Mercurial > hg > nginx-site
annotate xml/en/docs/http/ngx_http_upstream_module.xml @ 2559:82e6029db0c0
Updated with Netcraft June 2020 Web Server Survey stats.
author | Yaroslav Zhuravlev <yar@nginx.com> |
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date | Thu, 25 Jun 2020 13:12:56 +0100 |
parents | 504536999408 |
children | fdfe54a01ea1 |
rev | line source |
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1 <?xml version="1.0"?> |
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2 |
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3 <!-- |
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4 Copyright (C) Igor Sysoev |
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5 Copyright (C) Nginx, Inc. |
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6 --> |
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7 |
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8 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd"> |
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9 |
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10 <module name="Module ngx_http_upstream_module" |
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11 link="/en/docs/http/ngx_http_upstream_module.html" |
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13 rev="84"> |
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14 |
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15 <section id="summary"> |
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16 |
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17 <para> |
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18 The <literal>ngx_http_upstream_module</literal> module |
966 | 19 is used to define groups of servers that can be referenced |
20 by the <link doc="ngx_http_proxy_module.xml" id="proxy_pass"/>, | |
1181 | 21 <link doc="ngx_http_fastcgi_module.xml" id="fastcgi_pass"/>, |
1194 | 22 <link doc="ngx_http_uwsgi_module.xml" id="uwsgi_pass"/>, |
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23 <link doc="ngx_http_scgi_module.xml" id="scgi_pass"/>, |
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24 <link doc="ngx_http_memcached_module.xml" id="memcached_pass"/>, and |
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25 <link doc="ngx_http_grpc_module.xml" id="grpc_pass"/> directives. |
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26 </para> |
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27 |
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28 </section> |
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29 |
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30 |
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31 <section id="example" name="Example Configuration"> |
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32 |
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33 <para> |
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34 <example> |
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35 upstream <emphasis>backend</emphasis> { |
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36 server backend1.example.com weight=5; |
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37 server backend2.example.com:8080; |
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38 server unix:/tmp/backend3; |
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39 |
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40 server backup1.example.com:8080 backup; |
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41 server backup2.example.com:8080 backup; |
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42 } |
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43 |
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44 server { |
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45 location / { |
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46 proxy_pass http://<emphasis>backend</emphasis>; |
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47 } |
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48 } |
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49 </example> |
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50 </para> |
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51 |
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52 <para> |
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53 Dynamically configurable group with |
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54 periodic <link doc="ngx_http_upstream_hc_module.xml">health checks</link> is |
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55 available as part of our |
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56 <commercial_version>commercial subscription</commercial_version>: |
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57 <example> |
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58 resolver 10.0.0.1; |
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59 |
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60 upstream <emphasis>dynamic</emphasis> { |
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61 zone upstream_dynamic 64k; |
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62 |
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63 server backend1.example.com weight=5; |
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64 server backend2.example.com:8080 fail_timeout=5s slow_start=30s; |
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65 server 192.0.2.1 max_fails=3; |
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66 server backend3.example.com resolve; |
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67 server backend4.example.com service=http resolve; |
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68 |
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69 server backup1.example.com:8080 backup; |
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70 server backup2.example.com:8080 backup; |
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71 } |
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72 |
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73 server { |
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74 location / { |
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75 proxy_pass http://<emphasis>dynamic</emphasis>; |
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76 health_check; |
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77 } |
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78 } |
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79 </example> |
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80 </para> |
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81 |
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82 </section> |
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83 |
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84 |
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85 <section id="directives" name="Directives"> |
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86 |
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87 <directive name="upstream"> |
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88 <syntax block="yes"><value>name</value></syntax> |
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89 <default/> |
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90 <context>http</context> |
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91 |
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92 <para> |
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93 Defines a group of servers. |
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94 Servers can listen on different ports. |
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95 In addition, servers listening on TCP and UNIX-domain sockets |
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96 can be mixed. |
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97 </para> |
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98 |
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99 <para> |
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100 Example: |
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101 <example> |
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102 upstream backend { |
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103 server backend1.example.com weight=5; |
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104 server 127.0.0.1:8080 max_fails=3 fail_timeout=30s; |
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105 server unix:/tmp/backend3; |
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106 |
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107 server backup1.example.com backup; |
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108 } |
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109 </example> |
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110 </para> |
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111 |
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112 <para> |
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114 weighted round-robin balancing method. |
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115 In the above example, each 7 requests will be distributed as follows: |
966 | 116 5 requests go to <literal>backend1.example.com</literal> |
117 and one request to each of the second and third servers. | |
118 If an error occurs during communication with a server, the request will | |
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119 be passed to the next server, and so on until all of the functioning |
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120 servers will be tried. |
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121 If a successful response could not be obtained from any of the servers, |
966 | 122 the client will receive the result of the communication with the last server. |
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123 </para> |
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124 |
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125 </directive> |
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126 |
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127 |
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128 <directive name="server"> |
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129 <syntax><value>address</value> [<value>parameters</value>]</syntax> |
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130 <default/> |
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131 <context>upstream</context> |
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132 |
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133 <para> |
966 | 134 Defines the <value>address</value> and other <value>parameters</value> |
135 of a server. | |
136 The address can be specified as a domain name or IP address, | |
137 with an optional port, or as a UNIX-domain socket path | |
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138 specified after the “<literal>unix:</literal>” prefix. |
966 | 139 If a port is not specified, the port 80 is used. |
140 A domain name that resolves to several IP addresses defines | |
141 multiple servers at once. | |
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142 </para> |
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143 |
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144 <para> |
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145 The following parameters can be defined: |
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146 <list type="tag"> |
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147 |
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148 <tag-name id="weight"> |
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149 <literal>weight</literal>=<value>number</value> |
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150 </tag-name> |
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151 <tag-desc> |
966 | 152 sets the weight of the server, by default, 1. |
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153 </tag-desc> |
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154 |
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155 <tag-name id="max_conns"> |
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156 <literal>max_conns</literal>=<value>number</value> |
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157 </tag-name> |
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158 <tag-desc> |
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159 limits the maximum <value>number</value> of simultaneous active |
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160 connections to the proxied server (1.11.5). |
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161 Default value is zero, meaning there is no limit. |
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162 If the server group does not reside in the <link id="zone">shared memory</link>, |
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163 the limitation works per each worker process. |
1800
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164 <note> |
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165 If <link id="keepalive">idle keepalive</link> connections, |
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166 multiple <link doc="../ngx_core_module.xml" id="worker_processes">workers</link>, |
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167 and the <link id="zone">shared memory</link> are enabled, |
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168 the total number of active and idle connections to the proxied server |
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169 may exceed the <literal>max_conns</literal> value. |
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170 </note> |
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171 <note> |
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172 Since version 1.5.9 and prior to version 1.11.5, |
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173 this parameter was available as part of our |
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174 <commercial_version>commercial subscription</commercial_version>. |
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175 </note> |
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176 </tag-desc> |
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177 |
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178 <tag-name id="max_fails"> |
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179 <literal>max_fails</literal>=<value>number</value> |
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180 </tag-name> |
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181 <tag-desc> |
966 | 182 sets the number of unsuccessful attempts to communicate with the server |
183 that should happen in the duration set by the <literal>fail_timeout</literal> | |
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184 parameter to consider the server unavailable for a duration also set by the |
966 | 185 <literal>fail_timeout</literal> parameter. |
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186 By default, the number of unsuccessful attempts is set to 1. |
966 | 187 The zero value disables the accounting of attempts. |
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188 What is considered an unsuccessful attempt is defined by the |
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189 <link doc="ngx_http_proxy_module.xml" id="proxy_next_upstream"/>, |
1181 | 190 <link doc="ngx_http_fastcgi_module.xml" id="fastcgi_next_upstream"/>, |
1194 | 191 <link doc="ngx_http_uwsgi_module.xml" id="uwsgi_next_upstream"/>, |
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192 <link doc="ngx_http_scgi_module.xml" id="scgi_next_upstream"/>, |
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193 <link doc="ngx_http_memcached_module.xml" id="memcached_next_upstream"/>, and |
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194 <link doc="ngx_http_grpc_module.xml" id="grpc_next_upstream"/> |
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195 directives. |
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196 </tag-desc> |
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197 |
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198 <tag-name id="fail_timeout"> |
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199 <literal>fail_timeout</literal>=<value>time</value> |
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200 </tag-name> |
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201 <tag-desc> |
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202 sets |
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203 <list type="bullet"> |
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204 |
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205 <listitem> |
966 | 206 the time during which the specified number of unsuccessful attempts to |
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207 communicate with the server should happen to consider the server unavailable; |
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208 </listitem> |
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209 |
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210 <listitem> |
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211 and the period of time the server will be considered unavailable. |
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212 </listitem> |
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213 |
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214 </list> |
966 | 215 By default, the parameter is set to 10 seconds. |
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216 </tag-desc> |
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217 |
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218 <tag-name id="backup"> |
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219 <literal>backup</literal> |
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220 </tag-name> |
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221 <tag-desc> |
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222 marks the server as a backup server. |
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223 It will be passed requests when the primary servers are unavailable. |
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224 <note> |
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225 The parameter cannot be used along with the |
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226 <link id="hash"/>, <link id="ip_hash"/>, and <link id="random"/> |
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227 load balancing methods. |
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228 </note> |
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229 </tag-desc> |
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230 |
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231 <tag-name id="down"> |
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232 <literal>down</literal> |
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233 </tag-name> |
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234 <tag-desc> |
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235 marks the server as permanently unavailable. |
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236 </tag-desc> |
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237 |
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238 </list> |
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239 </para> |
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240 |
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241 <para> |
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242 Additionally, |
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243 the following parameters are available as part of our |
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244 <commercial_version>commercial subscription</commercial_version>: |
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245 <list type="tag"> |
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246 |
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247 <tag-name id="resolve"> |
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248 <literal>resolve</literal> |
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249 </tag-name> |
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250 <tag-desc> |
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251 monitors changes of the IP addresses |
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252 that correspond to a domain name of the server, |
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253 and automatically modifies the upstream configuration |
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254 without the need of restarting nginx (1.5.12). |
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255 The server group must reside in the <link id="zone">shared memory</link>. |
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256 <para> |
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257 In order for this parameter to work, |
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258 the <literal>resolver</literal> directive |
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259 must be specified in the |
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260 <link doc="ngx_http_core_module.xml" id="resolver">http</link> block |
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261 or in the corresponding <link id="resolver">upstream</link> block. |
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262 </para> |
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263 </tag-desc> |
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264 |
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265 <tag-name id="route"> |
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266 <literal>route</literal>=<value>string</value> |
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267 </tag-name> |
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268 <tag-desc> |
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269 sets the server route name. |
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270 </tag-desc> |
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271 |
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272 <tag-name id="service"> |
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273 <literal>service</literal>=<value>name</value> |
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274 </tag-name> |
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275 <tag-desc> |
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276 enables resolving of DNS |
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277 <link url="https://tools.ietf.org/html/rfc2782">SRV</link> |
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278 records and sets the service <value>name</value> (1.9.13). |
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279 In order for this parameter to work, it is necessary to specify |
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280 the <link id="resolve"/> parameter for the server |
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281 and specify a hostname without a port number. |
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282 <para> |
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283 If the service name does not contain a dot (“<literal>.</literal>”), then |
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284 the <link url="https://tools.ietf.org/html/rfc2782">RFC</link>-compliant name |
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285 is constructed |
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286 and the TCP protocol is added to the service prefix. |
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287 For example, to look up the |
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288 <literal>_http._tcp.backend.example.com</literal> SRV record, |
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289 it is necessary to specify the directive: |
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290 <example> |
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291 server backend.example.com service=http resolve; |
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292 </example> |
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293 If the service name contains one or more dots, then the name is constructed |
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294 by joining the service prefix and the server name. |
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295 For example, to look up the <literal>_http._tcp.backend.example.com</literal> |
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296 and <literal>server1.backend.example.com</literal> SRV records, |
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297 it is necessary to specify the directives: |
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298 <example> |
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299 server backend.example.com service=_http._tcp resolve; |
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300 server example.com service=server1.backend resolve; |
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301 </example> |
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302 </para> |
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303 |
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304 <para> |
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305 Highest-priority SRV records |
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306 (records with the same lowest-number priority value) |
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307 are resolved as primary servers, |
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308 the rest of SRV records are resolved as backup servers. |
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309 If the <link id="backup"/> parameter is specified for the server, |
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310 high-priority SRV records are resolved as backup servers, |
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311 the rest of SRV records are ignored. |
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312 </para> |
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313 </tag-desc> |
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314 |
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315 <tag-name id="slow_start"> |
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316 <literal>slow_start</literal>=<value>time</value> |
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317 </tag-name> |
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318 <tag-desc> |
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319 sets the <value>time</value> during which the server will recover its weight |
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320 from zero to a nominal value, when unhealthy server becomes |
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321 <link doc="ngx_http_upstream_hc_module.xml" id="health_check">healthy</link>, |
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322 or when the server becomes available after a period of time |
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323 it was considered <link id="fail_timeout">unavailable</link>. |
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324 Default value is zero, i.e. slow start is disabled. |
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325 <note> |
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326 The parameter cannot be used along with the |
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327 <link id="hash"/>, <link id="ip_hash"/>, and <link id="random"/> |
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328 load balancing methods. |
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329 </note> |
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330 </tag-desc> |
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331 |
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332 <tag-name id="drain"> |
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333 <literal>drain</literal> |
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334 </tag-name> |
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335 <tag-desc> |
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336 puts the server into the “draining” mode (1.13.6). |
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337 In this mode, only requests <link id="sticky">bound</link> to the server |
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338 will be proxied to it. |
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339 <note> |
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340 Prior to version 1.13.6, |
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341 the parameter could be changed only with the |
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342 <link doc="ngx_http_api_module.xml">API</link> module. |
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343 </note> |
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344 </tag-desc> |
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345 |
533
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346 </list> |
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347 </para> |
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348 |
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349 <para> |
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350 <note> |
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351 If there is only a single server in a group, <literal>max_fails</literal>, |
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352 <literal>fail_timeout</literal> and <literal>slow_start</literal> parameters |
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353 are ignored, and such a server will never be considered unavailable. |
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354 </note> |
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355 </para> |
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356 |
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357 </directive> |
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358 |
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359 |
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360 <directive name="zone"> |
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361 <syntax><value>name</value> [<value>size</value>]</syntax> |
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362 <default/> |
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363 <context>upstream</context> |
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364 <appeared-in>1.9.0</appeared-in> |
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365 |
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366 <para> |
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367 Defines the <value>name</value> and <value>size</value> of the shared |
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368 memory zone that keeps the group’s configuration and run-time state that are |
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369 shared between worker processes. |
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370 Several groups may share the same zone. |
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371 In this case, it is enough to specify the <value>size</value> only once. |
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372 </para> |
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373 |
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374 <para> |
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375 Additionally, |
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376 as part of our <commercial_version>commercial subscription</commercial_version>, |
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377 such groups allow changing the group membership |
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378 or modifying the settings of a particular server |
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379 without the need of restarting nginx. |
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380 The configuration is accessible via the |
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381 <link doc="ngx_http_api_module.xml">API</link> module (1.13.3). |
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382 <note> |
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383 Prior to version 1.13.3, |
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384 the configuration was accessible only via a special location |
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385 handled by |
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386 <link doc="ngx_http_upstream_conf_module.xml" id="upstream_conf"/>. |
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387 </note> |
953
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388 </para> |
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389 |
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390 </directive> |
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391 |
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392 |
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393 <directive name="state"> |
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394 <syntax><value>file</value></syntax> |
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395 <default/> |
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396 <context>upstream</context> |
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397 <appeared-in>1.9.7</appeared-in> |
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398 |
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399 <para> |
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400 Specifies a <value>file</value> that keeps the state |
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401 of the dynamically configurable group. |
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402 </para> |
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403 |
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404 <para> |
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405 Examples: |
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406 <example> |
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407 state /var/lib/nginx/state/servers.conf; # path for Linux |
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408 state /var/db/nginx/state/servers.conf; # path for FreeBSD |
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409 </example> |
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410 </para> |
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411 |
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412 <para> |
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413 The state is currently limited to the list of servers with their parameters. |
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414 The file is read when parsing the configuration and is updated each time |
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415 the upstream configuration is |
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416 <link doc="ngx_http_api_module.xml" id="http_upstreams_http_upstream_name_servers_">changed</link>. |
1636
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417 Changing the file content directly should be avoided. |
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418 The directive cannot be used |
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419 along with the <link id="server"/> directive. |
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420 </para> |
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421 |
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422 <para> |
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423 <note> |
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424 Changes made during |
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425 <link doc="../control.xml" id="reconfiguration">configuration reload</link> |
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426 or <link doc="../control.xml" id="upgrade">binary upgrade</link> |
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427 can be lost. |
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428 </note> |
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429 </para> |
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430 |
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431 <para> |
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432 <note> |
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433 This directive is available as part of our |
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434 <commercial_version>commercial subscription</commercial_version>. |
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435 </note> |
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436 </para> |
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437 |
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438 </directive> |
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439 |
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440 |
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441 <directive name="hash"> |
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442 <syntax><value>key</value> [<literal>consistent</literal>]</syntax> |
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443 <default/> |
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444 <context>upstream</context> |
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445 <appeared-in>1.7.2</appeared-in> |
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446 |
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447 <para> |
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448 Specifies a load balancing method for a server group |
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449 where the client-server mapping is based on the hashed <value>key</value> value. |
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450 The <value>key</value> can contain text, variables, and their combinations. |
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451 Note that adding or removing a server from the group |
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452 may result in remapping most of the keys to different servers. |
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|
453 The method is compatible with the |
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|
454 <link url="https://metacpan.org/pod/Cache::Memcached">Cache::Memcached</link> |
1230
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|
455 Perl library. |
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|
456 </para> |
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457 |
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|
458 <para> |
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459 If the <literal>consistent</literal> parameter is specified, |
2274
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|
460 the <link url="https://www.metabrew.com/article/libketama-consistent-hashing-algo-memcached-clients">ketama</link> |
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|
461 consistent hashing method will be used instead. |
1230
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462 The method ensures that only a few keys |
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463 will be remapped to different servers |
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464 when a server is added to or removed from the group. |
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|
465 This helps to achieve a higher cache hit ratio for caching servers. |
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|
466 The method is compatible with the |
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|
467 <link url="https://metacpan.org/pod/Cache::Memcached::Fast">Cache::Memcached::Fast</link> |
1236 | 468 Perl library with the <value>ketama_points</value> parameter set to 160. |
1230
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|
469 </para> |
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|
470 |
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|
471 </directive> |
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|
472 |
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|
473 |
293
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|
474 <directive name="ip_hash"> |
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|
475 <syntax/> |
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|
476 <default/> |
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|
477 <context>upstream</context> |
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|
478 |
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|
479 <para> |
533
fb630c3c5039
Revamped the upstream documentation somewhat.
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diff
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|
480 Specifies that a group should use a load balancing method where requests |
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|
481 are distributed between servers based on client IP addresses. |
542
a9e6a8613534
Documented IPv6 support in ip_hash.
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533
diff
changeset
|
482 The first three octets of the client IPv4 address, or the entire IPv6 address, |
533
fb630c3c5039
Revamped the upstream documentation somewhat.
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diff
changeset
|
483 are used as a hashing key. |
966 | 484 The method ensures that requests from the same client will always be |
968
fa19bacf6e1e
Unified upstream server up/down state terminology.
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diff
changeset
|
485 passed to the same server except when this server is unavailable. |
966 | 486 In the latter case client requests will be passed to another server. |
487 Most probably, it will always be the same server as well. | |
542
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diff
changeset
|
488 <note> |
566 | 489 IPv6 addresses are supported starting from versions 1.3.2 and 1.2.2. |
542
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490 </note> |
293
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491 </para> |
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492 |
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493 <para> |
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494 If one of the servers needs to be temporarily removed, it should |
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495 be marked with the <literal>down</literal> parameter in |
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496 order to preserve the current hashing of client IP addresses. |
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497 </para> |
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498 |
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499 <para> |
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500 Example: |
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501 <example> |
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502 upstream backend { |
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503 ip_hash; |
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504 |
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505 server backend1.example.com; |
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506 server backend2.example.com; |
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507 server backend3.example.com <emphasis>down</emphasis>; |
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508 server backend4.example.com; |
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509 } |
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510 </example> |
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511 </para> |
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512 |
526
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513 <para> |
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514 <note> |
966 | 515 Until versions 1.3.1 and 1.2.2, it was not possible to specify a weight for |
533
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526
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516 servers using the <literal>ip_hash</literal> load balancing method. |
526
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517 </note> |
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518 </para> |
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519 |
293
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520 </directive> |
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521 |
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522 |
316
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523 <directive name="keepalive"> |
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524 <syntax><value>connections</value></syntax> |
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525 <default/> |
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526 <context>upstream</context> |
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527 <appeared-in>1.1.4</appeared-in> |
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528 |
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529 <para> |
966 | 530 Activates the cache for connections to upstream servers. |
316
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531 </para> |
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532 |
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533 <para> |
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534 The <value>connections</value> parameter sets the maximum number of |
966 | 535 idle keepalive connections to upstream servers that are preserved in |
536 the cache of each worker process. | |
654
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537 When this number is exceeded, the least recently used connections |
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538 are closed. |
316
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539 <note> |
966 | 540 It should be particularly noted that the <literal>keepalive</literal> directive |
541 does not limit the total number of connections to upstream servers | |
542 that an nginx worker process can open. | |
543 The <value>connections</value> parameter should be set to a number small enough | |
544 to let upstream servers process new incoming connections as well. | |
316
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545 </note> |
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546 </para> |
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547 |
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548 <para> |
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549 Example configuration of memcached upstream with keepalive connections: |
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550 <example> |
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551 upstream memcached_backend { |
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552 server 127.0.0.1:11211; |
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553 server 10.0.0.2:11211; |
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554 |
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555 keepalive 32; |
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556 } |
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557 |
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558 server { |
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559 ... |
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560 |
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561 location /memcached/ { |
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562 set $memcached_key $uri; |
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563 memcached_pass memcached_backend; |
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564 } |
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565 |
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566 } |
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567 </example> |
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568 </para> |
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569 |
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570 <para> |
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571 For HTTP, the <link doc="ngx_http_proxy_module.xml" id="proxy_http_version"/> |
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572 directive should be set to “<literal>1.1</literal>” |
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573 and the <header>Connection</header> header field should be cleared: |
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574 <example> |
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575 upstream http_backend { |
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576 server 127.0.0.1:8080; |
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577 |
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578 keepalive 16; |
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579 } |
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580 |
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581 server { |
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582 ... |
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583 |
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584 location /http/ { |
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585 proxy_pass http://http_backend; |
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586 proxy_http_version 1.1; |
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587 proxy_set_header Connection ""; |
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588 ... |
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589 } |
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590 } |
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591 </example> |
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592 </para> |
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593 |
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|
594 <para> |
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595 <note> |
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596 Alternatively, HTTP/1.0 persistent connections can be used by passing the |
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597 <header>Connection: Keep-Alive</header> header field to an upstream server, |
966 | 598 though this method is not recommended. |
316
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599 </note> |
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600 </para> |
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|
601 |
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|
602 <para> |
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603 For FastCGI servers, it is required to set |
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604 <link doc="ngx_http_fastcgi_module.xml" id="fastcgi_keep_conn"/> |
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605 for keepalive connections to work: |
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606 <example> |
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607 upstream fastcgi_backend { |
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608 server 127.0.0.1:9000; |
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609 |
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610 keepalive 8; |
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611 } |
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diff
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|
612 |
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|
613 server { |
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|
614 ... |
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diff
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|
615 |
1fb1c077658b
Documented the following directives: "keepalive", "proxy_http_version",
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diff
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|
616 location /fastcgi/ { |
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diff
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|
617 fastcgi_pass fastcgi_backend; |
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diff
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|
618 fastcgi_keep_conn on; |
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|
619 ... |
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diff
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|
620 } |
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|
621 } |
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|
622 </example> |
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|
623 </para> |
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|
624 |
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|
625 <para> |
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|
626 <note> |
533
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Revamped the upstream documentation somewhat.
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diff
changeset
|
627 When using load balancer methods other than the default |
966 | 628 round-robin method, it is necessary to activate them before |
316
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|
629 the <literal>keepalive</literal> directive. |
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|
630 </note> |
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|
631 |
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|
632 <note> |
533
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|
633 SCGI and uwsgi protocols do not have a notion of keepalive connections. |
316
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|
634 </note> |
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|
635 </para> |
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|
636 |
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|
637 </directive> |
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|
638 |
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|
639 |
2223
a692df6ef304
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|
640 <directive name="keepalive_requests"> |
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|
641 <syntax><value>number</value></syntax> |
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|
642 <default>100</default> |
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|
643 <context>upstream</context> |
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|
644 <appeared-in>1.15.3</appeared-in> |
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|
645 |
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|
646 <para> |
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|
647 Sets the maximum number of requests that can be |
2225
e2c3d17d0f58
Unified wording of upstream keepalive directives.
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|
648 served through one keepalive connection. |
2223
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|
649 After the maximum number of requests is made, the connection is closed. |
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|
650 </para> |
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|
651 |
2450
a26a42699207
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changeset
|
652 <para> |
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|
653 Closing connections periodically is necessary to free |
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|
654 per-connection memory allocations. |
a26a42699207
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|
655 Therefore, using too high maximum number of requests |
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|
656 could result in excessive memory usage and not recommended. |
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diff
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|
657 </para> |
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changeset
|
658 |
2223
a692df6ef304
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|
659 </directive> |
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diff
changeset
|
660 |
a692df6ef304
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diff
changeset
|
661 |
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|
662 <directive name="keepalive_timeout"> |
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|
663 <syntax><value>timeout</value></syntax> |
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|
664 <default>60s</default> |
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|
665 <context>upstream</context> |
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|
666 <appeared-in>1.15.3</appeared-in> |
a692df6ef304
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diff
changeset
|
667 |
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diff
changeset
|
668 <para> |
2225
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diff
changeset
|
669 Sets a timeout during which an idle keepalive |
2223
a692df6ef304
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changeset
|
670 connection to an upstream server will stay open. |
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|
671 </para> |
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changeset
|
672 |
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changeset
|
673 </directive> |
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diff
changeset
|
674 |
a692df6ef304
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diff
changeset
|
675 |
1561
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|
676 <directive name="ntlm"> |
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|
677 <syntax/> |
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|
678 <default/> |
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|
679 <context>upstream</context> |
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|
680 <appeared-in>1.9.2</appeared-in> |
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|
681 |
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|
682 <para> |
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|
683 Allows proxying requests with |
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|
684 <link url="https://en.wikipedia.org/wiki/Integrated_Windows_Authentication">NTLM |
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|
685 Authentication</link>. |
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|
686 The upstream connection is bound to the client connection |
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|
687 once the client sends a request with the <header>Authorization</header> |
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|
688 header field value |
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|
689 starting with “<literal>Negotiate</literal>” or “<literal>NTLM</literal>”. |
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|
690 Further client requests will be proxied through the same upstream connection, |
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|
691 keeping the authentication context. |
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changeset
|
692 </para> |
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changeset
|
693 |
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changeset
|
694 <para> |
1587
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|
695 In order for NTLM authentication to work, |
c2a0a18e65ba
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|
696 it is necessary to enable keepalive connections to upstream servers. |
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|
697 The <link doc="ngx_http_proxy_module.xml" id="proxy_http_version"/> |
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|
698 directive should be set to “<literal>1.1</literal>” |
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|
699 and the <header>Connection</header> header field should be cleared: |
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|
700 <example> |
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|
701 upstream http_backend { |
c2a0a18e65ba
Added keepalive info for ntlm.
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changeset
|
702 server 127.0.0.1:8080; |
c2a0a18e65ba
Added keepalive info for ntlm.
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diff
changeset
|
703 |
c2a0a18e65ba
Added keepalive info for ntlm.
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changeset
|
704 ntlm; |
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changeset
|
705 } |
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diff
changeset
|
706 |
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changeset
|
707 server { |
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changeset
|
708 ... |
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diff
changeset
|
709 |
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Added keepalive info for ntlm.
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changeset
|
710 location /http/ { |
c2a0a18e65ba
Added keepalive info for ntlm.
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changeset
|
711 proxy_pass http://http_backend; |
c2a0a18e65ba
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|
712 proxy_http_version 1.1; |
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changeset
|
713 proxy_set_header Connection ""; |
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Added keepalive info for ntlm.
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changeset
|
714 ... |
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Added keepalive info for ntlm.
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diff
changeset
|
715 } |
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Added keepalive info for ntlm.
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diff
changeset
|
716 } |
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changeset
|
717 </example> |
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Added keepalive info for ntlm.
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|
718 </para> |
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changeset
|
719 |
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changeset
|
720 <para> |
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|
721 <note> |
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|
722 When using load balancer methods other than the default |
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changeset
|
723 round-robin method, it is necessary to activate them before |
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Added keepalive info for ntlm.
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changeset
|
724 the <literal>ntlm</literal> directive. |
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|
725 </note> |
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|
726 </para> |
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Added keepalive info for ntlm.
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changeset
|
727 |
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changeset
|
728 <para> |
1561
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|
729 <note> |
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changeset
|
730 This directive is available as part of our |
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changeset
|
731 <commercial_version>commercial subscription</commercial_version>. |
ed420c318557
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1544
diff
changeset
|
732 </note> |
ed420c318557
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1544
diff
changeset
|
733 </para> |
ed420c318557
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1544
diff
changeset
|
734 |
ed420c318557
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1544
diff
changeset
|
735 </directive> |
ed420c318557
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1544
diff
changeset
|
736 |
ed420c318557
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1544
diff
changeset
|
737 |
526
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
738 <directive name="least_conn"> |
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
739 <syntax/> |
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
740 <default/> |
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
741 <context>upstream</context> |
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
742 <appeared-in>1.3.1</appeared-in> |
566 | 743 <appeared-in>1.2.2</appeared-in> |
526
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
744 |
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
745 <para> |
533
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
746 Specifies that a group should use a load balancing method where a request |
526
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
747 is passed to the server with the least number of active connections, |
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
Ruslan Ermilov <ru@nginx.com>
parents:
316
diff
changeset
|
748 taking into account weights of servers. |
1232
ab2ea38f3512
Upstream: least_conn description corresponds to the Russian text.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1230
diff
changeset
|
749 If there are several such servers, they are tried in turn using a |
533
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
750 weighted round-robin balancing method. |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
751 </para> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
752 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
753 </directive> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
754 |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
755 |
1450
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
756 <directive name="least_time"> |
1925
a58b35cc0823
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1891
diff
changeset
|
757 <syntax> |
a58b35cc0823
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1891
diff
changeset
|
758 <literal>header</literal> | |
a58b35cc0823
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1891
diff
changeset
|
759 <literal>last_byte</literal> |
a58b35cc0823
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1891
diff
changeset
|
760 [<literal>inflight</literal>]</syntax> |
1450
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
761 <default/> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
762 <context>upstream</context> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
763 <appeared-in>1.7.10</appeared-in> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
764 |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
765 <para> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
766 Specifies that a group should use a load balancing method where a request |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
767 is passed to the server with the least average response time and |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
768 least number of active connections, taking into account weights of servers. |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
769 If there are several such servers, they are tried in turn using a |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
770 weighted round-robin balancing method. |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
771 </para> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
772 |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
773 <para> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
774 If the <literal>header</literal> parameter is specified, |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
775 time to receive the |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
776 <link id="var_upstream_header_time">response header</link> is used. |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
777 If the <literal>last_byte</literal> parameter is specified, |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
778 time to receive the <link id="var_upstream_response_time">full response</link> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
779 is used. |
1925
a58b35cc0823
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1891
diff
changeset
|
780 If the <literal>inflight</literal> parameter is specified (1.11.6), |
a58b35cc0823
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1891
diff
changeset
|
781 incomplete requests are also taken into account. |
a58b35cc0823
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1891
diff
changeset
|
782 <note> |
a58b35cc0823
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1891
diff
changeset
|
783 Prior to version 1.11.6, incomplete requests were taken into account by default. |
a58b35cc0823
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1891
diff
changeset
|
784 </note> |
1450
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
785 </para> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
786 |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
787 <para> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
788 <note> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
789 This directive is available as part of our |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
790 <commercial_version>commercial subscription</commercial_version>. |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
791 </note> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
792 </para> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
793 |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
794 </directive> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
795 |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
796 |
1125
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
797 <directive name="queue"> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
798 <syntax> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
799 <value>number</value> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
800 [<literal>timeout</literal>=<value>time</value>]</syntax> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
801 <default/> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
802 <context>upstream</context> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
803 <appeared-in>1.5.12</appeared-in> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
804 |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
805 <para> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
806 If an upstream server cannot be selected immediately |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
807 while processing a request, |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
808 the request will be placed into the queue. |
2067
014323d0cc38
Highlighted the "number" value in the queue directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2062
diff
changeset
|
809 The directive specifies the maximum <value>number</value> of requests |
014323d0cc38
Highlighted the "number" value in the queue directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2062
diff
changeset
|
810 that can be in the queue at the same time. |
1125
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
811 If the queue is filled up, |
1543
08242a0abf11
Fixed grammar in the upstream queue directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1504
diff
changeset
|
812 or the server to pass the request to cannot be selected within |
1125
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
813 the time period specified in the <literal>timeout</literal> parameter, |
1625
0ba4b2e561bd
Added 502 error to the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1587
diff
changeset
|
814 the <http-status code="502" text="Bad Gateway"/> |
0ba4b2e561bd
Added 502 error to the "queue" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1587
diff
changeset
|
815 error will be returned to the client. |
1125
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
816 </para> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
817 |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
818 <para> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
819 The default value of the <literal>timeout</literal> parameter is 60 seconds. |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
820 </para> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
821 |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
822 <para> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
823 <note> |
1925
a58b35cc0823
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1891
diff
changeset
|
824 When using load balancer methods other than the default |
a58b35cc0823
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1891
diff
changeset
|
825 round-robin method, it is necessary to activate them before |
a58b35cc0823
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1891
diff
changeset
|
826 the <literal>queue</literal> directive. |
a58b35cc0823
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1891
diff
changeset
|
827 </note> |
a58b35cc0823
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1891
diff
changeset
|
828 |
a58b35cc0823
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1891
diff
changeset
|
829 <note> |
1128
1594ed379f1f
De-i18n'ed <commercial_version/>.
Ruslan Ermilov <ru@nginx.com>
parents:
1127
diff
changeset
|
830 This directive is available as part of our |
1594ed379f1f
De-i18n'ed <commercial_version/>.
Ruslan Ermilov <ru@nginx.com>
parents:
1127
diff
changeset
|
831 <commercial_version>commercial subscription</commercial_version>. |
1125
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
832 </note> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
833 </para> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
834 |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
835 </directive> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
836 |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
837 |
2191
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
838 <directive name="random"> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
839 <syntax>[<literal>two</literal> [<value>method</value>]]</syntax> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
840 <default/> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
841 <context>upstream</context> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
842 <appeared-in>1.15.1</appeared-in> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
843 |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
844 <para> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
845 Specifies that a group should use a load balancing method where a request |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
846 is passed to a randomly selected server, taking into account weights |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
847 of servers. |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
848 </para> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
849 |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
850 <para> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
851 The optional <literal>two</literal> parameter |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
852 instructs nginx to randomly select |
2197
03f8a9c5e8ae
Updated link in the "random" directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2191
diff
changeset
|
853 <link url="https://homes.cs.washington.edu/~karlin/papers/balls.pdf">two</link> |
2191
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
854 servers and then choose a server |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
855 using the specified <literal>method</literal>. |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
856 The default method is <literal>least_conn</literal> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
857 which passes a request to a server |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
858 with the least number of active connections. |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
859 </para> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
860 |
2230
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2225
diff
changeset
|
861 <para id="random_least_time"> |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2225
diff
changeset
|
862 The <literal>least_time</literal> method passes a request to a server |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2225
diff
changeset
|
863 with the least average response time and least number of active connections. |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
864 If <literal>least_time=header</literal> is specified, the time to receive the |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2225
diff
changeset
|
865 <link id="var_upstream_header_time">response header</link> is used. |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2225
diff
changeset
|
866 If <literal>least_time=last_byte</literal> is specified, the time to receive the |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2225
diff
changeset
|
867 <link id="var_upstream_response_time">full response</link> is used. |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2225
diff
changeset
|
868 <note> |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2225
diff
changeset
|
869 The <literal>least_time</literal> method is available as a part of our |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2225
diff
changeset
|
870 <commercial_version>commercial subscription</commercial_version>. |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2225
diff
changeset
|
871 </note> |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2225
diff
changeset
|
872 </para> |
283b1e67eaa6
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2225
diff
changeset
|
873 |
2191
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
874 </directive> |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
875 |
2c56f91c304a
Documented the "random" directive.
Vladimir Homutov <vl@nginx.com>
parents:
2139
diff
changeset
|
876 |
2469
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
877 <directive name="resolver"> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
878 <syntax> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
879 <value>address</value> ... |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
880 [<literal>valid</literal>=<value>time</value>] |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
881 [<literal>ipv6</literal>=<literal>on</literal>|<literal>off</literal>] |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
882 [<literal>status_zone</literal>=<value>zone</value>]</syntax> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
883 <default/> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
884 <context>upstream</context> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
885 <appeared-in>1.17.5</appeared-in> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
886 |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
887 <para> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
888 Configures name servers used to resolve names of upstream servers |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
889 into addresses, for example: |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
890 <example> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
891 resolver 127.0.0.1 [::1]:5353; |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
892 </example> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
893 The address can be specified as a domain name or IP address, |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
894 with an optional port. |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
895 If port is not specified, the port 53 is used. |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
896 Name servers are queried in a round-robin fashion. |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
897 </para> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
898 |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
899 <para id="resolver_ipv6"> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
900 By default, nginx will look up both IPv4 and IPv6 addresses while resolving. |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
901 If looking up of IPv6 addresses is not desired, |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
902 the <literal>ipv6=off</literal> parameter can be specified. |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
903 </para> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
904 |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
905 <para id="resolver_valid"> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
906 By default, nginx caches answers using the TTL value of a response. |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
907 An optional <literal>valid</literal> parameter allows overriding it: |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
908 <example> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
909 resolver 127.0.0.1 [::1]:5353 valid=30s; |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
910 </example> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
911 <note> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
912 To prevent DNS spoofing, it is recommended |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
913 configuring DNS servers in a properly secured trusted local network. |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
914 </note> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
915 </para> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
916 |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
917 <para id="resolver_status_zone"> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
918 The optional <literal>status_zone</literal> parameter |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
919 enables |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
920 <link doc="ngx_http_api_module.xml" id="resolvers_">collection</link> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
921 of DNS server statistics of requests and responses |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
922 in the specified <value>zone</value>. |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
923 </para> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
924 |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
925 <para> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
926 <note> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
927 This directive is available as part of our |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
928 <commercial_version>commercial subscription</commercial_version>. |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
929 </note> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
930 </para> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
931 |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
932 </directive> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
933 |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
934 |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
935 <directive name="resolver_timeout"> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
936 <syntax><value>time</value></syntax> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
937 <default>30s</default> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
938 <context>upstream</context> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
939 <appeared-in>1.17.5</appeared-in> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
940 |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
941 <para> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
942 Sets a timeout for name resolution, for example: |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
943 <example> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
944 resolver_timeout 5s; |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
945 </example> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
946 </para> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
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parents:
2450
diff
changeset
|
947 |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
948 <para> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
949 <note> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
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parents:
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diff
changeset
|
950 This directive is available as part of our |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
951 <commercial_version>commercial subscription</commercial_version>. |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
952 </note> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
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parents:
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diff
changeset
|
953 </para> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
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parents:
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diff
changeset
|
954 |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2450
diff
changeset
|
955 </directive> |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
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parents:
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diff
changeset
|
956 |
98fd810c13e0
Updated docs for the upcoming NGINX Plus release.
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parents:
2450
diff
changeset
|
957 |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
958 <directive name="sticky"> |
1259
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
959 <syntax> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
960 <literal>cookie</literal> <value>name</value> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
961 [<literal>expires=</literal><value>time</value>] |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
962 [<literal>domain=</literal><value>domain</value>] |
1450
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
963 [<literal>httponly</literal>] |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
964 [<literal>secure</literal>] |
1259
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
965 [<literal>path=</literal><value>path</value>]</syntax> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
966 <syntax> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
967 <literal>route</literal> <value>$variable</value> ...</syntax> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
968 <syntax> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
969 <literal>learn</literal> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
970 <literal>create=</literal><value>$variable</value> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
971 <literal>lookup=</literal><value>$variable</value> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
972 <literal>zone=</literal><value>name</value>:<value>size</value> |
2028
5c55b7054b58
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1945
diff
changeset
|
973 [<literal>timeout=</literal><value>time</value>] |
2139
f6e578b1b02d
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2134
diff
changeset
|
974 [<literal>header</literal>] |
f6e578b1b02d
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2134
diff
changeset
|
975 [<literal>sync</literal>]</syntax> |
987
edd505634357
Documented the "sticky" directive.
Vladimir Homutov <vl@nginx.com>
parents:
981
diff
changeset
|
976 <default/> |
edd505634357
Documented the "sticky" directive.
Vladimir Homutov <vl@nginx.com>
parents:
981
diff
changeset
|
977 <context>upstream</context> |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
978 <appeared-in>1.5.7</appeared-in> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
979 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
980 <para> |
962
f3754c623e6b
Minor editing of the stiky_cookie_insert directive.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
960
diff
changeset
|
981 Enables session affinity, which causes requests from the same client to be |
960
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
982 passed to the same server in a group of servers. |
1259
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
983 Three methods are available: |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
984 <list type="tag"> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
985 <tag-name id="sticky_cookie"><literal>cookie</literal></tag-name> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
986 <tag-desc> |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
987 |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
988 <para> |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
989 When the <literal>cookie</literal> method is used, information about the |
1259
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
990 designated server is passed in an HTTP cookie generated by nginx: |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
991 <example> |
960
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
992 upstream backend { |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
993 server backend1.example.com; |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
994 server backend2.example.com; |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
995 |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
996 sticky cookie srv_id expires=1h domain=.example.com path=/; |
960
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
997 } |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
998 </example> |
960
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
999 </para> |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
1000 |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
1001 <para> |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
1002 A request that comes from a client not yet bound to a particular server |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
1003 is passed to the server selected by the configured balancing method. |
1259
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
1004 Further requests with this cookie will be passed to the designated server. |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1005 If the designated server cannot process a request, the new server is |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1006 selected as if the client has not been bound yet. |
960
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
1007 </para> |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
1008 |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
1009 <para> |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1010 The first parameter sets the name of the cookie to be set or inspected. |
2041
29b68a7b42fc
Documented cookie name for sticky cookie and server route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2028
diff
changeset
|
1011 The cookie value is |
29b68a7b42fc
Documented cookie name for sticky cookie and server route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2028
diff
changeset
|
1012 a hexadecimal representation of the MD5 hash of the IP address and port, |
29b68a7b42fc
Documented cookie name for sticky cookie and server route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2028
diff
changeset
|
1013 or of the UNIX-domain socket path. |
29b68a7b42fc
Documented cookie name for sticky cookie and server route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2028
diff
changeset
|
1014 However, if the “<literal>route</literal>” parameter of the |
29b68a7b42fc
Documented cookie name for sticky cookie and server route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2028
diff
changeset
|
1015 <link id="server"/> directive is specified, the cookie value will be |
29b68a7b42fc
Documented cookie name for sticky cookie and server route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2028
diff
changeset
|
1016 the value of the “<literal>route</literal>” parameter: |
29b68a7b42fc
Documented cookie name for sticky cookie and server route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2028
diff
changeset
|
1017 <example> |
29b68a7b42fc
Documented cookie name for sticky cookie and server route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2028
diff
changeset
|
1018 upstream backend { |
29b68a7b42fc
Documented cookie name for sticky cookie and server route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2028
diff
changeset
|
1019 server backend1.example.com route=<emphasis>a</emphasis>; |
29b68a7b42fc
Documented cookie name for sticky cookie and server route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2028
diff
changeset
|
1020 server backend2.example.com route=<emphasis>b</emphasis>; |
29b68a7b42fc
Documented cookie name for sticky cookie and server route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2028
diff
changeset
|
1021 |
29b68a7b42fc
Documented cookie name for sticky cookie and server route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2028
diff
changeset
|
1022 sticky cookie srv_id expires=1h domain=.example.com path=/; |
29b68a7b42fc
Documented cookie name for sticky cookie and server route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2028
diff
changeset
|
1023 } |
29b68a7b42fc
Documented cookie name for sticky cookie and server route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2028
diff
changeset
|
1024 </example> |
29b68a7b42fc
Documented cookie name for sticky cookie and server route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2028
diff
changeset
|
1025 In this case, the value of the “<literal>srv_id</literal>” cookie will be |
29b68a7b42fc
Documented cookie name for sticky cookie and server route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2028
diff
changeset
|
1026 either <value>a</value> or <value>b</value>. |
29b68a7b42fc
Documented cookie name for sticky cookie and server route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2028
diff
changeset
|
1027 </para> |
29b68a7b42fc
Documented cookie name for sticky cookie and server route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2028
diff
changeset
|
1028 |
29b68a7b42fc
Documented cookie name for sticky cookie and server route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2028
diff
changeset
|
1029 <para> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1030 Additional parameters may be as follows: |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1031 <list type="tag"> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1032 |
1450
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1033 <tag-name><literal>expires=</literal><value>time</value></tag-name> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1034 <tag-desc> |
1450
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1035 Sets the <value>time</value> for which a browser should keep the cookie. |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1036 The special value <literal>max</literal> will cause the cookie to expire on |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1037 “<literal>31 Dec 2037 23:55:55 GMT</literal>”. |
960
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
1038 If the parameter is not specified, it will cause the cookie to expire at |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
1039 the end of a browser session. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1040 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1041 |
1450
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1042 <tag-name><literal>domain=</literal><value>domain</value></tag-name> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1043 <tag-desc> |
1450
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1044 Defines the <value>domain</value> for which the cookie is set. |
1825
56b6244ddadb
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1818
diff
changeset
|
1045 Parameter value can contain variables (1.11.5). |
1450
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1046 </tag-desc> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1047 |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1048 <tag-name><literal>httponly</literal></tag-name> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1049 <tag-desc> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1050 Adds the <literal>HttpOnly</literal> attribute to the cookie (1.7.11). |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1051 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1052 |
1450
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1053 <tag-name><literal>secure</literal></tag-name> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1054 <tag-desc> |
1450
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1055 Adds the <literal>Secure</literal> attribute to the cookie (1.7.11). |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1056 |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1057 </tag-desc> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1058 |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1059 <tag-name><literal>path=</literal><value>path</value></tag-name> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1060 <tag-desc> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1061 Defines the <value>path</value> for which the cookie is set. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1062 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1063 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1064 </list> |
981 | 1065 If any parameters are omitted, the corresponding cookie fields are not set. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1066 </para> |
1259
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
1067 </tag-desc> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
1068 |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
1069 <tag-name id="sticky_route"><literal>route</literal></tag-name> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
1070 <tag-desc> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1071 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1072 <para> |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1073 When the <literal>route</literal> method is used, proxied server assigns |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1074 client a route on receipt of the first request. |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1075 All subsequent requests from this client will carry routing information |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1076 in a cookie or URI. |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1077 This information is compared with the “<literal>route</literal>” parameter |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1078 of the <link id="server"/> directive to identify the server to which the |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1079 request should be proxied. |
1854
dca985318cfe
Documented default value for server route in sticky route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1825
diff
changeset
|
1080 If the “<literal>route</literal>” parameter is not specified, the route name |
dca985318cfe
Documented default value for server route in sticky route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1825
diff
changeset
|
1081 will be a hexadecimal representation of the MD5 hash of the IP address and port, |
dca985318cfe
Documented default value for server route in sticky route.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1825
diff
changeset
|
1082 or of the UNIX-domain socket path. |
1026
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1083 If the designated server cannot process a request, the new server is |
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|
1084 selected by the configured balancing method as if there is no routing |
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diff
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|
1085 information in the request. |
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diff
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|
1086 </para> |
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|
1087 |
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diff
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|
1088 <para> |
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parents:
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|
1089 The parameters of the <literal>route</literal> method specify variables that |
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|
1090 may contain routing information. |
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|
1091 The first non-empty variable is used to find the matching server. |
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|
1092 </para> |
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|
1093 |
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|
1094 <para> |
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|
1095 Example: |
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diff
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|
1096 <example> |
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parents:
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|
1097 map $cookie_jsessionid $route_cookie { |
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|
1098 ~.+\.(?P<route>\w+)$ $route; |
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|
1099 } |
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|
1100 |
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|
1101 map $request_uri $route_uri { |
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diff
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|
1102 ~jsessionid=.+\.(?P<route>\w+)$ $route; |
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|
1103 } |
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|
1104 |
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|
1105 upstream backend { |
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|
1106 server backend1.example.com route=a; |
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Upstream: documented new "sticky" features.
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|
1107 server backend2.example.com route=b; |
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|
1108 |
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diff
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|
1109 sticky route $route_cookie $route_uri; |
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diff
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|
1110 } |
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diff
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|
1111 </example> |
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diff
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|
1112 Here, the route is taken from the “<literal>JSESSIONID</literal>” cookie |
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Upstream: documented new "sticky" features.
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|
1113 if present in a request. |
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Upstream: documented new "sticky" features.
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|
1114 Otherwise, the route from the URI is used. |
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Upstream: documented new "sticky" features.
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diff
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|
1115 </para> |
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|
1116 |
1259
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|
1117 </tag-desc> |
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|
1118 |
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|
1119 <tag-name id="sticky_learn"><literal>learn</literal></tag-name> |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1120 <tag-desc> |
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diff
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|
1121 <para> |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1122 When the <literal>learn</literal> method (1.7.1) is used, nginx |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1123 analyzes upstream server responses and learns server-initiated sessions |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1124 usually passed in an HTTP cookie. |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1125 <example> |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1126 upstream backend { |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1127 server backend1.example.com:8080; |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1128 server backend2.example.com:8081; |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1129 |
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Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
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diff
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|
1130 sticky learn |
1544
627a9309011c
Renamed cookie in the example of the sticky directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
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|
1131 create=$upstream_cookie_examplecookie |
627a9309011c
Renamed cookie in the example of the sticky directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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|
1132 lookup=$cookie_examplecookie |
1259
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
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|
1133 zone=client_sessions:1m; |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1134 } |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1135 </example> |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1136 |
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Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
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|
1137 In the example, the upstream server creates a session by setting the |
1544
627a9309011c
Renamed cookie in the example of the sticky directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1543
diff
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|
1138 cookie “<literal>EXAMPLECOOKIE</literal>” in the response. |
1259
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Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
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|
1139 Further requests with this cookie will be passed to the same server. |
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Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
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|
1140 If the server cannot process the request, the new server is |
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Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
1141 selected as if the client has not been bound yet. |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
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diff
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|
1142 </para> |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1143 |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1144 <para> |
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Upstream: "session learn" sticky method and upstream_conf changes.
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diff
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|
1145 The parameters <literal>create</literal> and <literal>lookup</literal> |
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Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
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|
1146 specify variables that indicate how new sessions are created and existing |
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Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
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|
1147 sessions are searched, respectively. |
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Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
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|
1148 Both parameters may be specified more than once, in which case the first |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
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|
1149 non-empty variable is used. |
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Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
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|
1150 </para> |
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Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
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diff
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|
1151 |
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Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
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|
1152 <para> |
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Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
1153 Sessions are stored in a shared memory zone, whose <value>name</value> and |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
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diff
changeset
|
1154 <value>size</value> are configured by the <literal>zone</literal> parameter. |
2139
f6e578b1b02d
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
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|
1155 One megabyte zone can store about 4000 sessions on the 64-bit platform. |
1259
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
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diff
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|
1156 The sessions that are not accessed during the time specified by the |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
1157 <literal>timeout</literal> parameter get removed from the zone. |
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Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
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changeset
|
1158 By default, <literal>timeout</literal> is set to 10 minutes. |
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Upstream: "session learn" sticky method and upstream_conf changes.
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diff
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|
1159 </para> |
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Upstream: "session learn" sticky method and upstream_conf changes.
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diff
changeset
|
1160 |
2028
5c55b7054b58
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1945
diff
changeset
|
1161 <para id="sticky_learn_header"> |
5c55b7054b58
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1945
diff
changeset
|
1162 The <literal>header</literal> parameter (1.13.1) allows creating a session |
5c55b7054b58
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1945
diff
changeset
|
1163 right after receiving response headers from the upstream server. |
5c55b7054b58
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1945
diff
changeset
|
1164 </para> |
5c55b7054b58
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1945
diff
changeset
|
1165 |
2139
f6e578b1b02d
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2134
diff
changeset
|
1166 <para id="sticky_learn_sync"> |
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Updated docs for the upcoming NGINX Plus release.
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|
1167 The <literal>sync</literal> parameter (1.13.8) enables |
f6e578b1b02d
Updated docs for the upcoming NGINX Plus release.
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diff
changeset
|
1168 <link doc="../stream/ngx_stream_zone_sync_module.xml" id="zone_sync">synchronization</link> |
f6e578b1b02d
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
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|
1169 of the shared memory zone. |
f6e578b1b02d
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
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|
1170 </para> |
f6e578b1b02d
Updated docs for the upcoming NGINX Plus release.
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|
1171 |
1259
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|
1172 </tag-desc> |
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|
1173 </list> |
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|
1174 </para> |
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|
1175 |
1026
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|
1176 <para> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1177 <note> |
1128
1594ed379f1f
De-i18n'ed <commercial_version/>.
Ruslan Ermilov <ru@nginx.com>
parents:
1127
diff
changeset
|
1178 This directive is available as part of our |
1594ed379f1f
De-i18n'ed <commercial_version/>.
Ruslan Ermilov <ru@nginx.com>
parents:
1127
diff
changeset
|
1179 <commercial_version>commercial subscription</commercial_version>. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1180 </note> |
aded7086e84f
Commercial version documentation.
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parents:
942
diff
changeset
|
1181 </para> |
aded7086e84f
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parents:
942
diff
changeset
|
1182 |
aded7086e84f
Commercial version documentation.
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parents:
942
diff
changeset
|
1183 </directive> |
aded7086e84f
Commercial version documentation.
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parents:
942
diff
changeset
|
1184 |
aded7086e84f
Commercial version documentation.
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942
diff
changeset
|
1185 |
1026
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changeset
|
1186 <directive name="sticky_cookie_insert"> |
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|
1187 <syntax><value>name</value> |
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diff
changeset
|
1188 [<literal>expires=</literal><value>time</value>] |
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changeset
|
1189 [<literal>domain=</literal><value>domain</value>] |
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diff
changeset
|
1190 [<literal>path=</literal><value>path</value>]</syntax> |
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parents:
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diff
changeset
|
1191 <default/> |
3056640d5022
Upstream: documented new "sticky" features.
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parents:
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diff
changeset
|
1192 <context>upstream</context> |
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parents:
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diff
changeset
|
1193 |
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diff
changeset
|
1194 <para> |
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Upstream: documented new "sticky" features.
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parents:
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diff
changeset
|
1195 This directive is obsolete since version 1.5.7. |
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Upstream: documented new "sticky" features.
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diff
changeset
|
1196 An equivalent |
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Upstream: documented new "sticky" features.
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parents:
1011
diff
changeset
|
1197 <link id="sticky"/> directive with a new syntax should be used instead: |
3056640d5022
Upstream: documented new "sticky" features.
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parents:
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diff
changeset
|
1198 <note> |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1199 <literal>sticky cookie</literal> <value>name</value> |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1200 [<literal>expires=</literal><value>time</value>] |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1201 [<literal>domain=</literal><value>domain</value>] |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1202 [<literal>path=</literal><value>path</value>]; |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1203 </note> |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1204 </para> |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1205 |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1206 </directive> |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1207 |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1208 </section> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1209 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1210 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1211 <section id="variables" name="Embedded Variables"> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1212 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1213 <para> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1214 The <literal>ngx_http_upstream_module</literal> module |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1215 supports the following embedded variables: |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1216 <list type="tag"> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1217 |
1155
07402a11fd8d
Assigned IDs to tags describing variables.
Vladimir Homutov <vl@nginx.com>
parents:
1128
diff
changeset
|
1218 <tag-name id="var_upstream_addr"><var>$upstream_addr</var></tag-name> |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1219 <tag-desc> |
1391
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1220 keeps the IP address and port, |
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1221 or the path to the UNIX-domain socket of the upstream server. |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1222 If several servers were contacted during request processing, |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1223 their addresses are separated by commas, e.g. |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1224 “<literal>192.168.1.1:80, 192.168.1.2:80, unix:/tmp/sock</literal>”. |
966 | 1225 If an internal redirect from one server group to another happens, |
1226 initiated by | |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1227 <header>X-Accel-Redirect</header> or |
966 | 1228 <link doc="ngx_http_core_module.xml" id="error_page"/>, |
1229 then the server addresses from different groups are separated by colons, e.g. | |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1230 “<literal>192.168.1.1:80, 192.168.1.2:80, unix:/tmp/sock : 192.168.10.1:80, 192.168.10.2:80</literal>”. |
2058
eb58ee50561d
Documented upstream name in $upstream_addr.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2041
diff
changeset
|
1231 If a server cannot be selected, |
eb58ee50561d
Documented upstream name in $upstream_addr.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2041
diff
changeset
|
1232 the variable keeps the name of the server group. |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1233 </tag-desc> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1234 |
1783
031566771bbd
Documented $upstream_bytes_received for http upstream.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1722
diff
changeset
|
1235 <tag-name id="var_upstream_bytes_received"><var>$upstream_bytes_received</var></tag-name> |
031566771bbd
Documented $upstream_bytes_received for http upstream.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1722
diff
changeset
|
1236 <tag-desc> |
031566771bbd
Documented $upstream_bytes_received for http upstream.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1722
diff
changeset
|
1237 number of bytes received from an upstream server (1.11.4). |
031566771bbd
Documented $upstream_bytes_received for http upstream.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1722
diff
changeset
|
1238 Values from several connections |
031566771bbd
Documented $upstream_bytes_received for http upstream.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1722
diff
changeset
|
1239 are separated by commas and colons like addresses in the |
031566771bbd
Documented $upstream_bytes_received for http upstream.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1722
diff
changeset
|
1240 <link id="var_upstream_addr">$upstream_addr</link> variable. |
031566771bbd
Documented $upstream_bytes_received for http upstream.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1722
diff
changeset
|
1241 </tag-desc> |
031566771bbd
Documented $upstream_bytes_received for http upstream.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1722
diff
changeset
|
1242 |
2307
994207cf96da
Documented the "$upstream_bytes_sent" variable for http.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2282
diff
changeset
|
1243 <tag-name id="var_upstream_bytes_sent"><var>$upstream_bytes_sent</var></tag-name> |
994207cf96da
Documented the "$upstream_bytes_sent" variable for http.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2282
diff
changeset
|
1244 <tag-desc> |
994207cf96da
Documented the "$upstream_bytes_sent" variable for http.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2282
diff
changeset
|
1245 number of bytes sent to an upstream server (1.15.8). |
994207cf96da
Documented the "$upstream_bytes_sent" variable for http.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2282
diff
changeset
|
1246 Values from several connections |
994207cf96da
Documented the "$upstream_bytes_sent" variable for http.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2282
diff
changeset
|
1247 are separated by commas and colons like addresses in the |
994207cf96da
Documented the "$upstream_bytes_sent" variable for http.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2282
diff
changeset
|
1248 <link id="var_upstream_addr">$upstream_addr</link> variable. |
994207cf96da
Documented the "$upstream_bytes_sent" variable for http.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2282
diff
changeset
|
1249 </tag-desc> |
994207cf96da
Documented the "$upstream_bytes_sent" variable for http.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2282
diff
changeset
|
1250 |
1155
07402a11fd8d
Assigned IDs to tags describing variables.
Vladimir Homutov <vl@nginx.com>
parents:
1128
diff
changeset
|
1251 <tag-name id="var_upstream_cache_status"><var>$upstream_cache_status</var> |
07402a11fd8d
Assigned IDs to tags describing variables.
Vladimir Homutov <vl@nginx.com>
parents:
1128
diff
changeset
|
1252 </tag-name> |
731
f62328124e5b
Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents:
654
diff
changeset
|
1253 <tag-desc> |
966 | 1254 keeps the status of accessing a response cache (0.8.3). |
1075
6c021feec587
Removed unjustified non-breakable spaces.
Ruslan Ermilov <ru@nginx.com>
parents:
1026
diff
changeset
|
1255 The status can be either “<literal>MISS</literal>”, |
731
f62328124e5b
Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents:
654
diff
changeset
|
1256 “<literal>BYPASS</literal>”, “<literal>EXPIRED</literal>”, |
1011
2ad2f30efdf2
Documented the "fastcgi_" and "proxy_cache_revalidate" directives.
Vladimir Homutov <vl@nginx.com>
parents:
1003
diff
changeset
|
1257 “<literal>STALE</literal>”, “<literal>UPDATING</literal>”, |
1391
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1258 “<literal>REVALIDATED</literal>”, or “<literal>HIT</literal>”. |
731
f62328124e5b
Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents:
654
diff
changeset
|
1259 </tag-desc> |
f62328124e5b
Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents:
654
diff
changeset
|
1260 |
1481
f29398a167d0
Documented the upstream_connect_time variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1461
diff
changeset
|
1261 <tag-name id="var_upstream_connect_time"><var>$upstream_connect_time</var> |
f29398a167d0
Documented the upstream_connect_time variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1461
diff
changeset
|
1262 </tag-name> |
f29398a167d0
Documented the upstream_connect_time variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1461
diff
changeset
|
1263 <tag-desc> |
f29398a167d0
Documented the upstream_connect_time variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1461
diff
changeset
|
1264 keeps time spent on establishing a connection with the upstream server (1.9.1); |
f29398a167d0
Documented the upstream_connect_time variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1461
diff
changeset
|
1265 the time is kept in seconds with millisecond resolution. |
f29398a167d0
Documented the upstream_connect_time variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1461
diff
changeset
|
1266 In case of SSL, includes time spent on handshake. |
f29398a167d0
Documented the upstream_connect_time variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1461
diff
changeset
|
1267 Times of several connections |
f29398a167d0
Documented the upstream_connect_time variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1461
diff
changeset
|
1268 are separated by commas and colons like addresses in the |
f29398a167d0
Documented the upstream_connect_time variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1461
diff
changeset
|
1269 <link id="var_upstream_addr">$upstream_addr</link> variable. |
f29398a167d0
Documented the upstream_connect_time variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1461
diff
changeset
|
1270 </tag-desc> |
f29398a167d0
Documented the upstream_connect_time variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1461
diff
changeset
|
1271 |
1186
8125bec5c7a1
Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1181
diff
changeset
|
1272 <tag-name id="var_upstream_cookie_"><var>$upstream_cookie_</var><value>name</value> |
8125bec5c7a1
Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1181
diff
changeset
|
1273 </tag-name> |
8125bec5c7a1
Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1181
diff
changeset
|
1274 <tag-desc> |
8125bec5c7a1
Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1181
diff
changeset
|
1275 cookie with the specified <value>name</value> sent by the upstream server |
8125bec5c7a1
Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1181
diff
changeset
|
1276 in the <header>Set-Cookie</header> response header field (1.7.1). |
1391
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1277 Only the cookies from the response of the last server are saved. |
1186
8125bec5c7a1
Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1181
diff
changeset
|
1278 </tag-desc> |
8125bec5c7a1
Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1181
diff
changeset
|
1279 |
1393
15e8779f0ceb
Documented the $upstream_header_time variable.
Ruslan Ermilov <ru@nginx.com>
parents:
1392
diff
changeset
|
1280 <tag-name id="var_upstream_header_time"><var>$upstream_header_time</var> |
15e8779f0ceb
Documented the $upstream_header_time variable.
Ruslan Ermilov <ru@nginx.com>
parents:
1392
diff
changeset
|
1281 </tag-name> |
15e8779f0ceb
Documented the $upstream_header_time variable.
Ruslan Ermilov <ru@nginx.com>
parents:
1392
diff
changeset
|
1282 <tag-desc> |
15e8779f0ceb
Documented the $upstream_header_time variable.
Ruslan Ermilov <ru@nginx.com>
parents:
1392
diff
changeset
|
1283 keeps time |
15e8779f0ceb
Documented the $upstream_header_time variable.
Ruslan Ermilov <ru@nginx.com>
parents:
1392
diff
changeset
|
1284 spent on receiving the response header from the upstream server (1.7.10); |
15e8779f0ceb
Documented the $upstream_header_time variable.
Ruslan Ermilov <ru@nginx.com>
parents:
1392
diff
changeset
|
1285 the time is kept in seconds with millisecond resolution. |
15e8779f0ceb
Documented the $upstream_header_time variable.
Ruslan Ermilov <ru@nginx.com>
parents:
1392
diff
changeset
|
1286 Times of several responses |
15e8779f0ceb
Documented the $upstream_header_time variable.
Ruslan Ermilov <ru@nginx.com>
parents:
1392
diff
changeset
|
1287 are separated by commas and colons like addresses in the |
15e8779f0ceb
Documented the $upstream_header_time variable.
Ruslan Ermilov <ru@nginx.com>
parents:
1392
diff
changeset
|
1288 <link id="var_upstream_addr">$upstream_addr</link> variable. |
15e8779f0ceb
Documented the $upstream_header_time variable.
Ruslan Ermilov <ru@nginx.com>
parents:
1392
diff
changeset
|
1289 </tag-desc> |
15e8779f0ceb
Documented the $upstream_header_time variable.
Ruslan Ermilov <ru@nginx.com>
parents:
1392
diff
changeset
|
1290 |
1392
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1291 <tag-name id="var_upstream_http_"><var>$upstream_http_</var><value>name</value></tag-name> |
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1292 <tag-desc> |
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1293 keep server response header fields. |
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1294 For example, the <header>Server</header> response header field |
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1295 is available through the <var>$upstream_http_server</var> variable. |
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1296 The rules of converting header field names to variable names are the same |
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1297 as for the variables that start with the |
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1298 “<link doc="ngx_http_core_module.xml" id="var_http_">$http_</link>” prefix. |
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1299 Only the header fields from the response of the last server are saved. |
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1300 </tag-desc> |
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1301 |
2139
f6e578b1b02d
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2134
diff
changeset
|
1302 <tag-name id="var_upstream_queue_time"><var>$upstream_queue_time</var></tag-name> |
f6e578b1b02d
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2134
diff
changeset
|
1303 <tag-desc> |
f6e578b1b02d
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2134
diff
changeset
|
1304 keeps time the request spent in the upstream <link id="queue">queue</link> |
f6e578b1b02d
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2134
diff
changeset
|
1305 (1.13.9); |
f6e578b1b02d
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2134
diff
changeset
|
1306 the time is kept in seconds with millisecond resolution. |
f6e578b1b02d
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2134
diff
changeset
|
1307 Times of several responses |
f6e578b1b02d
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2134
diff
changeset
|
1308 are separated by commas and colons like addresses in the |
f6e578b1b02d
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2134
diff
changeset
|
1309 <link id="var_upstream_addr">$upstream_addr</link> variable. |
f6e578b1b02d
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2134
diff
changeset
|
1310 </tag-desc> |
f6e578b1b02d
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
2134
diff
changeset
|
1311 |
1155
07402a11fd8d
Assigned IDs to tags describing variables.
Vladimir Homutov <vl@nginx.com>
parents:
1128
diff
changeset
|
1312 <tag-name id="var_upstream_response_length"><var>$upstream_response_length</var> |
07402a11fd8d
Assigned IDs to tags describing variables.
Vladimir Homutov <vl@nginx.com>
parents:
1128
diff
changeset
|
1313 </tag-name> |
731
f62328124e5b
Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents:
654
diff
changeset
|
1314 <tag-desc> |
1391
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1315 keeps the length of the response obtained from the upstream server (0.7.27); |
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1316 the length is kept in bytes. |
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1317 Lengths of several responses |
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1318 are separated by commas and colons like addresses in the |
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1319 <link id="var_upstream_addr">$upstream_addr</link> variable. |
731
f62328124e5b
Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents:
654
diff
changeset
|
1320 </tag-desc> |
f62328124e5b
Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents:
654
diff
changeset
|
1321 |
1155
07402a11fd8d
Assigned IDs to tags describing variables.
Vladimir Homutov <vl@nginx.com>
parents:
1128
diff
changeset
|
1322 <tag-name id="var_upstream_response_time"><var>$upstream_response_time</var> |
07402a11fd8d
Assigned IDs to tags describing variables.
Vladimir Homutov <vl@nginx.com>
parents:
1128
diff
changeset
|
1323 </tag-name> |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1324 <tag-desc> |
1391
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1325 keeps time spent on receiving the response from the upstream server; |
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1326 the time is kept in seconds with millisecond resolution. |
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1327 Times of several responses |
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1328 are separated by commas and colons like addresses in the |
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1329 <link id="var_upstream_addr">$upstream_addr</link> variable. |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1330 </tag-desc> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1331 |
1155
07402a11fd8d
Assigned IDs to tags describing variables.
Vladimir Homutov <vl@nginx.com>
parents:
1128
diff
changeset
|
1332 <tag-name id="var_upstream_status"><var>$upstream_status</var></tag-name> |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1333 <tag-desc> |
1391
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1334 keeps status code of the response obtained from the upstream server. |
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1335 Status codes of several responses |
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1336 are separated by commas and colons like addresses in the |
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1337 <link id="var_upstream_addr">$upstream_addr</link> variable. |
2062
7275c134ec67
Documented "no live upstreams" case for $upstream_status.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2058
diff
changeset
|
1338 If a server cannot be selected, |
7275c134ec67
Documented "no live upstreams" case for $upstream_status.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2058
diff
changeset
|
1339 the variable keeps the <http-status code="502" text="Bad Gateway"/> status code. |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1340 </tag-desc> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1341 |
2113
180269c4a220
Documented the "upstream_trailer_" variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2097
diff
changeset
|
1342 <tag-name id="var_upstream_trailer_"><var>$upstream_trailer_</var><value>name</value></tag-name> |
180269c4a220
Documented the "upstream_trailer_" variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2097
diff
changeset
|
1343 <tag-desc> |
180269c4a220
Documented the "upstream_trailer_" variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2097
diff
changeset
|
1344 keeps fields from the end of the response |
180269c4a220
Documented the "upstream_trailer_" variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2097
diff
changeset
|
1345 obtained from the upstream server (1.13.10). |
180269c4a220
Documented the "upstream_trailer_" variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2097
diff
changeset
|
1346 </tag-desc> |
180269c4a220
Documented the "upstream_trailer_" variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
2097
diff
changeset
|
1347 |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1348 </list> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1349 </para> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1350 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1351 </section> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1352 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1353 </module> |