Mercurial > hg > nginx-site
annotate xml/en/docs/http/ngx_http_upstream_module.xml @ 1780:8df9ba4e56c6
Documented 400 error in stream $status.
author | Yaroslav Zhuravlev <yar@nginx.com> |
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date | Tue, 13 Sep 2016 16:14:49 +0300 |
parents | 61aca81458a0 |
children | 031566771bbd |
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" |
589 | 12 lang="en" |
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13 rev="48"> |
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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"/>, |
1181 | 23 <link doc="ngx_http_scgi_module.xml" id="scgi_pass"/>, and |
533
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24 <link doc="ngx_http_memcached_module.xml" id="memcached_pass"/> directives. |
293
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25 </para> |
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26 |
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27 </section> |
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28 |
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29 |
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30 <section id="example" name="Example Configuration"> |
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31 |
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32 <para> |
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33 <example> |
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34 upstream <emphasis>backend</emphasis> { |
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35 server backend1.example.com weight=5; |
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36 server backend2.example.com:8080; |
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37 server unix:/tmp/backend3; |
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38 |
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39 server backup1.example.com:8080 backup; |
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40 server backup2.example.com:8080 backup; |
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41 } |
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42 |
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43 server { |
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44 location / { |
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45 proxy_pass http://<emphasis>backend</emphasis>; |
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46 } |
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47 } |
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48 </example> |
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49 </para> |
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50 |
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51 <para> |
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52 Dynamically configurable group, |
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53 available as part of our |
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54 <commercial_version>commercial subscription</commercial_version>: |
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55 <example> |
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56 resolver 10.0.0.1; |
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57 |
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58 upstream <emphasis>dynamic</emphasis> { |
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59 zone upstream_dynamic 64k; |
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60 |
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61 server backend1.example.com weight=5; |
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62 server backend2.example.com:8080 fail_timeout=5s slow_start=30s; |
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63 server 192.0.2.1 max_fails=3; |
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64 server backend3.example.com resolve; |
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65 server backend4.example.com service=http resolve; |
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66 |
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67 server backup1.example.com:8080 backup; |
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68 server backup2.example.com:8080 backup; |
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69 } |
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70 |
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71 server { |
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72 location / { |
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73 proxy_pass http://<emphasis>dynamic</emphasis>; |
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74 health_check; |
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75 } |
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76 } |
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77 </example> |
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78 </para> |
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79 |
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80 </section> |
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81 |
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82 |
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83 <section id="directives" name="Directives"> |
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84 |
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85 <directive name="upstream"> |
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86 <syntax block="yes"><value>name</value></syntax> |
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87 <default/> |
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88 <context>http</context> |
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89 |
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90 <para> |
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91 Defines a group of servers. |
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92 Servers can listen on different ports. |
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93 In addition, servers listening on TCP and UNIX-domain sockets |
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94 can be mixed. |
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95 </para> |
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96 |
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97 <para> |
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98 Example: |
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99 <example> |
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100 upstream backend { |
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101 server backend1.example.com weight=5; |
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102 server 127.0.0.1:8080 max_fails=3 fail_timeout=30s; |
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103 server unix:/tmp/backend3; |
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104 |
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105 server backup1.example.com backup; |
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106 } |
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107 </example> |
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108 </para> |
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109 |
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110 <para> |
966 | 111 By default, requests are distributed between the servers using a |
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112 weighted round-robin balancing method. |
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113 In the above example, each 7 requests will be distributed as follows: |
966 | 114 5 requests go to <literal>backend1.example.com</literal> |
115 and one request to each of the second and third servers. | |
116 If an error occurs during communication with a server, the request will | |
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117 be passed to the next server, and so on until all of the functioning |
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118 servers will be tried. |
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119 If a successful response could not be obtained from any of the servers, |
966 | 120 the client will receive the result of the communication with the last server. |
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121 </para> |
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122 |
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123 </directive> |
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124 |
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125 |
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126 <directive name="server"> |
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127 <syntax><value>address</value> [<value>parameters</value>]</syntax> |
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128 <default/> |
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129 <context>upstream</context> |
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130 |
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131 <para> |
966 | 132 Defines the <value>address</value> and other <value>parameters</value> |
133 of a server. | |
134 The address can be specified as a domain name or IP address, | |
135 with an optional port, or as a UNIX-domain socket path | |
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136 specified after the “<literal>unix:</literal>” prefix. |
966 | 137 If a port is not specified, the port 80 is used. |
138 A domain name that resolves to several IP addresses defines | |
139 multiple servers at once. | |
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140 </para> |
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141 |
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142 <para> |
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143 The following parameters can be defined: |
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144 <list type="tag"> |
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145 |
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146 <tag-name id="weight"> |
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147 <literal>weight</literal>=<value>number</value> |
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148 </tag-name> |
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149 <tag-desc> |
966 | 150 sets the weight of the server, by default, 1. |
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151 </tag-desc> |
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152 |
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153 <tag-name id="max_fails"> |
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154 <literal>max_fails</literal>=<value>number</value> |
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155 </tag-name> |
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156 <tag-desc> |
966 | 157 sets the number of unsuccessful attempts to communicate with the server |
158 that should happen in the duration set by the <literal>fail_timeout</literal> | |
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159 parameter to consider the server unavailable for a duration also set by the |
966 | 160 <literal>fail_timeout</literal> parameter. |
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161 By default, the number of unsuccessful attempts is set to 1. |
966 | 162 The zero value disables the accounting of attempts. |
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163 What is considered an unsuccessful attempt is defined by the |
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164 <link doc="ngx_http_proxy_module.xml" id="proxy_next_upstream"/>, |
1181 | 165 <link doc="ngx_http_fastcgi_module.xml" id="fastcgi_next_upstream"/>, |
1194 | 166 <link doc="ngx_http_uwsgi_module.xml" id="uwsgi_next_upstream"/>, |
1181 | 167 <link doc="ngx_http_scgi_module.xml" id="scgi_next_upstream"/>, and |
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168 <link doc="ngx_http_memcached_module.xml" id="memcached_next_upstream"/> |
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169 directives. |
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170 </tag-desc> |
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171 |
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172 <tag-name id="fail_timeout"> |
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173 <literal>fail_timeout</literal>=<value>time</value> |
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174 </tag-name> |
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175 <tag-desc> |
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176 sets |
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177 <list type="bullet"> |
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178 |
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179 <listitem> |
966 | 180 the time during which the specified number of unsuccessful attempts to |
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181 communicate with the server should happen to consider the server unavailable; |
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182 </listitem> |
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183 |
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184 <listitem> |
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185 and the period of time the server will be considered unavailable. |
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186 </listitem> |
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187 |
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188 </list> |
966 | 189 By default, the parameter is set to 10 seconds. |
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190 </tag-desc> |
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191 |
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192 <tag-name id="backup"> |
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193 <literal>backup</literal> |
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194 </tag-name> |
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195 <tag-desc> |
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196 marks the server as a backup server. |
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197 It will be passed requests when the primary servers are unavailable. |
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198 </tag-desc> |
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199 |
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200 <tag-name id="down"> |
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201 <literal>down</literal> |
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202 </tag-name> |
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203 <tag-desc> |
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204 marks the server as permanently unavailable. |
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205 </tag-desc> |
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206 |
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207 </list> |
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208 </para> |
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209 |
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210 <para> |
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211 Additionally, |
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212 the following parameters are available as part of our |
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213 <commercial_version>commercial subscription</commercial_version>: |
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214 <list type="tag"> |
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215 |
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216 <tag-name id="max_conns"> |
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217 <literal>max_conns</literal>=<value>number</value> |
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218 </tag-name> |
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219 <tag-desc> |
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220 limits the maximum <value>number</value> of simultaneous active |
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221 connections to the proxied server (1.5.9). |
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222 Default value is zero, meaning there is no limit. |
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223 <note> |
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224 When <link id="keepalive"/> connections and multiple |
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225 <link doc="../ngx_core_module.xml" id="worker_processes">workers</link> |
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226 are enabled, |
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227 the total number of connections to the proxied server |
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228 may exceed the <literal>max_conns</literal> value. |
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229 </note> |
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230 </tag-desc> |
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231 |
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232 <tag-name id="resolve"> |
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233 <literal>resolve</literal> |
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234 </tag-name> |
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235 <tag-desc> |
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236 monitors changes of the IP addresses |
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237 that correspond to a domain name of the server, |
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238 and automatically modifies the upstream configuration |
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239 without the need of restarting nginx (1.5.12). |
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240 The server group must reside in the <link id="zone">shared memory</link>. |
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241 <para> |
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242 In order for this parameter to work, |
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243 the <link doc="ngx_http_core_module.xml" id="resolver"/> directive |
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244 must be specified in the |
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245 <link doc="ngx_http_core_module.xml" id="http"/> block. |
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246 Example: |
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247 <example> |
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248 http { |
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249 resolver 10.0.0.1; |
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250 |
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251 upstream u { |
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252 zone ...; |
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253 ... |
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254 server example.com resolve; |
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255 } |
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256 } |
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257 </example> |
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258 </para> |
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259 </tag-desc> |
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260 |
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261 <tag-name id="route"> |
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262 <literal>route</literal>=<value>string</value> |
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263 </tag-name> |
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264 <tag-desc> |
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265 sets the server route name. |
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266 </tag-desc> |
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267 |
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268 <tag-name id="service"> |
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269 <literal>service</literal>=<value>name</value> |
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270 </tag-name> |
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271 <tag-desc> |
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272 enables resolving of DNS |
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273 <link url="https://tools.ietf.org/html/rfc2782">SRV</link> |
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274 records and sets the service <value>name</value> (1.9.13). |
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275 In order for this parameter to work, it is necessary to specify |
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276 the <link id="resolve"/> parameter for the server |
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277 and specify a hostname without a port number. |
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278 <para> |
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279 If the service name does not contain a dot (“<literal>.</literal>”), then |
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280 the <link url="https://tools.ietf.org/html/rfc2782">RFC</link>-compliant name |
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281 is constructed |
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282 and the TCP protocol is added to the service prefix. |
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283 For example, to look up the |
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284 <literal>_http._tcp.backend.example.com</literal> SRV record, |
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285 it is necessary to specify the directive: |
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286 <example> |
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287 server backend.example.com service=http resolve; |
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288 </example> |
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289 If the service name contains one or more dots, then the name is constructed |
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290 by joining the service prefix and the server name. |
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291 For example, to look up the <literal>_http._tcp.backend.example.com</literal> |
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292 and <literal>server1.backend.example.com</literal> SRV records, |
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293 it is necessary to specify the directives: |
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294 <example> |
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295 server backend.example.com service=_http._tcp resolve; |
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296 server example.com service=server1.backend resolve; |
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297 </example> |
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298 </para> |
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299 |
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300 <para> |
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301 Highest-priority SRV records |
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302 (records with the same lowest-number priority value) |
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303 are resolved as primary servers, |
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304 the rest of SRV records are resolved as backup servers. |
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305 If the <link id="backup"/> parameter is specified for the server, |
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306 high-priority SRV records are resolved as backup servers, |
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307 the rest of SRV records are ignored. |
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308 </para> |
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309 </tag-desc> |
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310 |
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311 <tag-name id="slow_start"> |
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312 <literal>slow_start</literal>=<value>time</value> |
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313 </tag-name> |
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314 <tag-desc> |
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315 sets the <value>time</value> during which the server will recover its weight |
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316 from zero to a nominal value, when unhealthy server becomes |
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317 <link id="health_check">healthy</link>, |
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318 or when the server becomes available after a period of time |
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319 it was considered <link id="fail_timeout">unavailable</link>. |
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320 Default value is zero, i.e. slow start is disabled. |
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321 </tag-desc> |
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322 |
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323 </list> |
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324 </para> |
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325 |
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326 <para> |
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327 <note> |
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328 If there is only a single server in a group, <literal>max_fails</literal>, |
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329 <literal>fail_timeout</literal> and <literal>slow_start</literal> parameters |
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330 are ignored, and such a server will never be considered unavailable. |
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331 </note> |
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332 </para> |
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333 |
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334 </directive> |
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335 |
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336 |
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337 <directive name="zone"> |
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338 <syntax><value>name</value> [<value>size</value>]</syntax> |
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339 <default/> |
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340 <context>upstream</context> |
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341 <appeared-in>1.9.0</appeared-in> |
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342 |
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343 <para> |
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344 Defines the <value>name</value> and <value>size</value> of the shared |
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345 memory zone that keeps the group’s configuration and run-time state that are |
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346 shared between worker processes. |
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347 Several groups may share the same zone. |
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348 In this case, it is enough to specify the <value>size</value> only once. |
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349 </para> |
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350 |
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351 <para> |
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352 Additionally, |
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353 as part of our <commercial_version>commercial subscription</commercial_version>, |
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354 such groups allow changing the group membership |
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355 or modifying the settings of a particular server |
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356 without the need of restarting nginx. |
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357 The configuration is accessible via a special location |
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358 handled by |
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359 <link doc="ngx_http_upstream_conf_module.xml" id="upstream_conf"/>. |
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360 </para> |
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361 |
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362 </directive> |
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363 |
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364 |
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365 <directive name="state"> |
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366 <syntax><value>file</value></syntax> |
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367 <default/> |
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368 <context>upstream</context> |
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369 <appeared-in>1.9.7</appeared-in> |
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370 |
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371 <para> |
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372 Specifies a <value>file</value> that keeps the state |
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373 of the dynamically configurable group. |
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374 The state is currently limited to the list of servers with their parameters. |
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375 The file is read when parsing the configuration and is updated each time |
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376 the upstream configuration is |
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377 <link doc="ngx_http_upstream_conf_module.xml" id="upstream_conf">changed</link>. |
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378 Changing the file content directly should be avoided. |
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379 The directive cannot be used |
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380 along with the <link id="server"/> directive. |
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381 </para> |
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382 |
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383 <para> |
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384 <note> |
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385 Changes made during |
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386 <link doc="../control.xml" id="reconfiguration">configuration reload</link> |
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387 or <link doc="../control.xml" id="upgrade">binary upgrade</link> |
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388 can be lost. |
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389 </note> |
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390 </para> |
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391 |
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392 <para> |
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393 <note> |
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394 This directive is available as part of our |
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395 <commercial_version>commercial subscription</commercial_version>. |
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396 </note> |
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397 </para> |
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398 |
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399 </directive> |
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400 |
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401 |
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402 <directive name="hash"> |
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403 <syntax><value>key</value> [<literal>consistent</literal>]</syntax> |
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404 <default/> |
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405 <context>upstream</context> |
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406 <appeared-in>1.7.2</appeared-in> |
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407 |
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408 <para> |
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409 Specifies a load balancing method for a server group |
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410 where the client-server mapping is based on the hashed <value>key</value> value. |
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411 The <value>key</value> can contain text, variables, and their combinations. |
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412 Note that adding or removing a server from the group |
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413 may result in remapping most of the keys to different servers. |
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414 The method is compatible with the |
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415 <link url="http://search.cpan.org/perldoc?Cache%3A%3AMemcached">Cache::Memcached</link> |
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416 Perl library. |
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417 </para> |
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418 |
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419 <para> |
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420 If the <literal>consistent</literal> parameter is specified |
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421 the <link url="http://www.last.fm/user/RJ/journal/2007/04/10/392555/">ketama</link> |
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422 consistent hashing method will be used instead. |
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423 The method ensures that only a few keys |
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424 will be remapped to different servers |
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425 when a server is added to or removed from the group. |
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426 This helps to achieve a higher cache hit ratio for caching servers. |
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427 The method is compatible with the |
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428 <link url="http://search.cpan.org/perldoc?Cache%3A%3AMemcached%3A%3AFast">Cache::Memcached::Fast</link> |
1236 | 429 Perl library with the <value>ketama_points</value> parameter set to 160. |
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430 </para> |
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431 |
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432 </directive> |
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433 |
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434 |
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435 <directive name="ip_hash"> |
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436 <syntax/> |
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437 <default/> |
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438 <context>upstream</context> |
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439 |
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440 <para> |
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441 Specifies that a group should use a load balancing method where requests |
293
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442 are distributed between servers based on client IP addresses. |
542
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443 The first three octets of the client IPv4 address, or the entire IPv6 address, |
533
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444 are used as a hashing key. |
966 | 445 The method ensures that requests from the same client will always be |
968
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446 passed to the same server except when this server is unavailable. |
966 | 447 In the latter case client requests will be passed to another server. |
448 Most probably, it will always be the same server as well. | |
542
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449 <note> |
566 | 450 IPv6 addresses are supported starting from versions 1.3.2 and 1.2.2. |
542
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451 </note> |
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452 </para> |
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453 |
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454 <para> |
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455 If one of the servers needs to be temporarily removed, it should |
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456 be marked with the <literal>down</literal> parameter in |
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457 order to preserve the current hashing of client IP addresses. |
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458 </para> |
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459 |
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460 <para> |
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461 Example: |
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462 <example> |
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463 upstream backend { |
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464 ip_hash; |
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465 |
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466 server backend1.example.com; |
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467 server backend2.example.com; |
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468 server backend3.example.com <emphasis>down</emphasis>; |
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469 server backend4.example.com; |
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470 } |
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471 </example> |
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472 </para> |
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473 |
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474 <para> |
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475 <note> |
966 | 476 Until versions 1.3.1 and 1.2.2, it was not possible to specify a weight for |
533
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477 servers using the <literal>ip_hash</literal> load balancing method. |
526
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478 </note> |
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479 </para> |
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480 |
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481 </directive> |
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482 |
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483 |
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484 <directive name="keepalive"> |
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485 <syntax><value>connections</value></syntax> |
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486 <default/> |
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487 <context>upstream</context> |
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488 <appeared-in>1.1.4</appeared-in> |
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489 |
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490 <para> |
966 | 491 Activates the cache for connections to upstream servers. |
316
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492 </para> |
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493 |
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494 <para> |
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495 The <value>connections</value> parameter sets the maximum number of |
966 | 496 idle keepalive connections to upstream servers that are preserved in |
497 the cache of each worker process. | |
654
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498 When this number is exceeded, the least recently used connections |
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499 are closed. |
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500 <note> |
966 | 501 It should be particularly noted that the <literal>keepalive</literal> directive |
502 does not limit the total number of connections to upstream servers | |
503 that an nginx worker process can open. | |
504 The <value>connections</value> parameter should be set to a number small enough | |
505 to let upstream servers process new incoming connections as well. | |
316
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506 </note> |
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507 </para> |
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508 |
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509 <para> |
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510 Example configuration of memcached upstream with keepalive connections: |
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511 <example> |
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512 upstream memcached_backend { |
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513 server 127.0.0.1:11211; |
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514 server 10.0.0.2:11211; |
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515 |
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516 keepalive 32; |
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517 } |
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518 |
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519 server { |
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520 ... |
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521 |
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522 location /memcached/ { |
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523 set $memcached_key $uri; |
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524 memcached_pass memcached_backend; |
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525 } |
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526 |
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527 } |
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528 </example> |
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529 </para> |
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530 |
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531 <para> |
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532 For HTTP, the <link doc="ngx_http_proxy_module.xml" id="proxy_http_version"/> |
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533 directive should be set to “<literal>1.1</literal>” |
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534 and the <header>Connection</header> header field should be cleared: |
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535 <example> |
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536 upstream http_backend { |
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537 server 127.0.0.1:8080; |
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538 |
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539 keepalive 16; |
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540 } |
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541 |
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542 server { |
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543 ... |
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544 |
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545 location /http/ { |
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546 proxy_pass http://http_backend; |
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547 proxy_http_version 1.1; |
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548 proxy_set_header Connection ""; |
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549 ... |
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550 } |
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551 } |
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552 </example> |
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553 </para> |
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554 |
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555 <para> |
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556 <note> |
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557 Alternatively, HTTP/1.0 persistent connections can be used by passing the |
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558 <header>Connection: Keep-Alive</header> header field to an upstream server, |
966 | 559 though this method is not recommended. |
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560 </note> |
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561 </para> |
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562 |
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563 <para> |
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564 For FastCGI servers, it is required to set |
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565 <link doc="ngx_http_fastcgi_module.xml" id="fastcgi_keep_conn"/> |
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566 for keepalive connections to work: |
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567 <example> |
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568 upstream fastcgi_backend { |
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569 server 127.0.0.1:9000; |
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570 |
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571 keepalive 8; |
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572 } |
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573 |
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574 server { |
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575 ... |
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576 |
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577 location /fastcgi/ { |
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578 fastcgi_pass fastcgi_backend; |
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579 fastcgi_keep_conn on; |
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580 ... |
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581 } |
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582 } |
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583 </example> |
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584 </para> |
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585 |
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586 <para> |
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587 <note> |
533
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588 When using load balancer methods other than the default |
966 | 589 round-robin method, it is necessary to activate them before |
316
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590 the <literal>keepalive</literal> directive. |
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591 </note> |
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592 |
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593 <note> |
533
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594 SCGI and uwsgi protocols do not have a notion of keepalive connections. |
316
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595 </note> |
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596 </para> |
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597 |
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598 </directive> |
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599 |
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600 |
1561
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601 <directive name="ntlm"> |
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602 <syntax/> |
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603 <default/> |
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604 <context>upstream</context> |
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605 <appeared-in>1.9.2</appeared-in> |
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606 |
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607 <para> |
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608 Allows proxying requests with |
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609 <link url="https://en.wikipedia.org/wiki/Integrated_Windows_Authentication">NTLM |
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610 Authentication</link>. |
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611 The upstream connection is bound to the client connection |
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612 once the client sends a request with the <header>Authorization</header> |
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613 header field value |
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614 starting with “<literal>Negotiate</literal>” or “<literal>NTLM</literal>”. |
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615 Further client requests will be proxied through the same upstream connection, |
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616 keeping the authentication context. |
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617 </para> |
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618 |
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619 <para> |
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|
620 In order for NTLM authentication to work, |
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|
621 it is necessary to enable keepalive connections to upstream servers. |
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|
622 The <link doc="ngx_http_proxy_module.xml" id="proxy_http_version"/> |
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|
623 directive should be set to “<literal>1.1</literal>” |
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|
624 and the <header>Connection</header> header field should be cleared: |
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|
625 <example> |
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|
626 upstream http_backend { |
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|
627 server 127.0.0.1:8080; |
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|
628 |
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|
629 ntlm; |
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|
630 } |
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|
631 |
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|
632 server { |
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|
633 ... |
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|
634 |
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|
635 location /http/ { |
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|
636 proxy_pass http://http_backend; |
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|
637 proxy_http_version 1.1; |
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|
638 proxy_set_header Connection ""; |
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|
639 ... |
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|
640 } |
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|
641 } |
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|
642 </example> |
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|
643 </para> |
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|
644 |
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|
645 <para> |
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|
646 <note> |
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|
647 When using load balancer methods other than the default |
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|
648 round-robin method, it is necessary to activate them before |
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|
649 the <literal>ntlm</literal> directive. |
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|
650 </note> |
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|
651 </para> |
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|
652 |
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|
653 <para> |
1561
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|
654 <note> |
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|
655 This directive is available as part of our |
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Updated docs for the upcoming NGINX Plus release.
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|
656 <commercial_version>commercial subscription</commercial_version>. |
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|
657 </note> |
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|
658 </para> |
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|
659 |
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|
660 </directive> |
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|
661 |
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|
662 |
526
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
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|
663 <directive name="least_conn"> |
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|
664 <syntax/> |
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|
665 <default/> |
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1.3.1 changes: ip_hash+weight, least_conn.
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|
666 <context>upstream</context> |
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1.3.1 changes: ip_hash+weight, least_conn.
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|
667 <appeared-in>1.3.1</appeared-in> |
566 | 668 <appeared-in>1.2.2</appeared-in> |
526
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1.3.1 changes: ip_hash+weight, least_conn.
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|
669 |
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1.3.1 changes: ip_hash+weight, least_conn.
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diff
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|
670 <para> |
533
fb630c3c5039
Revamped the upstream documentation somewhat.
Ruslan Ermilov <ru@nginx.com>
parents:
526
diff
changeset
|
671 Specifies that a group should use a load balancing method where a request |
526
4f907cde0382
1.3.1 changes: ip_hash+weight, least_conn.
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|
672 is passed to the server with the least number of active connections, |
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1.3.1 changes: ip_hash+weight, least_conn.
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|
673 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
|
674 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
|
675 weighted round-robin balancing method. |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
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parents:
diff
changeset
|
676 </para> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
677 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
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parents:
diff
changeset
|
678 </directive> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
679 |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
680 |
1450
f5b5eefc43cb
Updated commercial docs for the upcoming release.
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diff
changeset
|
681 <directive name="least_time"> |
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Updated commercial docs for the upcoming release.
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|
682 <syntax><literal>header</literal> | <literal>last_byte</literal></syntax> |
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Updated commercial docs for the upcoming release.
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diff
changeset
|
683 <default/> |
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parents:
1424
diff
changeset
|
684 <context>upstream</context> |
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Updated commercial docs for the upcoming release.
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parents:
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diff
changeset
|
685 <appeared-in>1.7.10</appeared-in> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
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parents:
1424
diff
changeset
|
686 |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
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parents:
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diff
changeset
|
687 <para> |
f5b5eefc43cb
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parents:
1424
diff
changeset
|
688 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
|
689 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
|
690 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
|
691 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
|
692 weighted round-robin balancing method. |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
693 </para> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
694 |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
695 <para> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
696 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
|
697 time to receive the |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
698 <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
|
699 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
|
700 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
|
701 is used. |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
702 </para> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
703 |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
704 <para> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
705 <note> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
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parents:
1424
diff
changeset
|
706 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
|
707 <commercial_version>commercial subscription</commercial_version>. |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
708 </note> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
709 </para> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
710 |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
711 </directive> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
712 |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
713 |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
714 <directive name="health_check"> |
1241
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
715 <syntax>[<value>parameters</value>]</syntax> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
716 <default/> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
717 <context>location</context> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
718 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
719 <para> |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
720 Enables periodic health checks of the servers in a |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
721 <link id="upstream">group</link> referenced in the surrounding location. |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
722 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
723 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
724 <para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
725 The following optional parameters are supported: |
1241
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
726 <list type="tag"> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
727 |
1241
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
728 <tag-name id="interval"> |
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
729 <literal>interval</literal>=<value>time</value> |
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
730 </tag-name> |
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
731 <tag-desc> |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
732 sets the interval between two consecutive health checks, |
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
733 by default, 5 seconds; |
1241
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
734 </tag-desc> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
735 |
1241
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
736 <tag-name id="fails"> |
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
737 <literal>fails</literal>=<value>number</value> |
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
738 </tag-name> |
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
739 <tag-desc> |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
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diff
changeset
|
740 sets the number of consecutive failed health checks of a particular server |
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
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diff
changeset
|
741 after which this server will be considered unhealthy, |
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
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diff
changeset
|
742 by default, 1; |
1241
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Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
743 </tag-desc> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
744 |
1241
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Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
745 <tag-name id="passes"> |
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
746 <literal>passes</literal>=<value>number</value> |
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
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diff
changeset
|
747 </tag-name> |
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
748 <tag-desc> |
956
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Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
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diff
changeset
|
749 sets the number of consecutive passed health checks of a particular server |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
750 after which the server will be considered healthy, |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
751 by default, 1; |
1241
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
752 </tag-desc> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
753 |
1241
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
754 <tag-name id="uri"> |
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
755 <literal>uri</literal>=<value>uri</value> |
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
756 </tag-name> |
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
757 <tag-desc> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
758 defines the URI used in health check requests, |
956
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Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
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diff
changeset
|
759 by default, “<literal>/</literal>”; |
1241
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Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
760 </tag-desc> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
761 |
1241
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
762 <tag-name id="hc_match"> |
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
763 <literal>match</literal>=<value>name</value> |
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
764 </tag-name> |
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
765 <tag-desc> |
956
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parents:
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diff
changeset
|
766 specifies the <literal>match</literal> block configuring the tests that a |
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
767 response should pass in order for a health check to pass; |
1636
44c4323144c5
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1625
diff
changeset
|
768 by default, the response should have status code 2xx or 3xx; |
44c4323144c5
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1625
diff
changeset
|
769 </tag-desc> |
44c4323144c5
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1625
diff
changeset
|
770 |
44c4323144c5
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1625
diff
changeset
|
771 <tag-name id="health_check_port"> |
44c4323144c5
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1625
diff
changeset
|
772 <literal>port</literal>=<value>number</value> |
44c4323144c5
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1625
diff
changeset
|
773 </tag-name> |
44c4323144c5
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1625
diff
changeset
|
774 <tag-desc> |
44c4323144c5
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1625
diff
changeset
|
775 defines the port used when connecting to a server |
44c4323144c5
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1625
diff
changeset
|
776 to perform a health check (1.9.7); |
44c4323144c5
Updated docs for the upcoming NGINX Plus release.
Ruslan Ermilov <ru@nginx.com>
parents:
1625
diff
changeset
|
777 by default, equals the <link id="server"/> port. |
1241
2246339a6a93
Upstream: added IDs for "server" and "health_check" params.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1236
diff
changeset
|
778 </tag-desc> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
779 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
780 </list> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
781 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
782 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
783 <para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
784 For example, |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
785 <example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
786 location / { |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
787 proxy_pass http://backend; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
788 health_check; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
789 } |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
790 </example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
791 will send “<literal>/</literal>” requests to each |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
792 server in the <literal>backend</literal> group every five seconds. |
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
793 If any communication error or timeout occurs, or a |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
794 proxied server responds with the status code other than |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
795 2xx or 3xx, the health check will fail, and the server will |
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
796 be considered unhealthy. |
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
797 Client requests are not passed to unhealthy servers. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
798 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
799 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
800 <para> |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
801 Health checks can be configured to test the status code of a response, |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
802 presence of certain header fields and their values, |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
803 and the body contents. |
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
804 Tests are configured separately using the <link id="match"/> directive |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
805 and referenced in the <literal>match</literal> parameter. |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
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diff
changeset
|
806 For example: |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
807 <example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
808 http { |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
809 server { |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
810 ... |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
811 location / { |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
812 proxy_pass http://backend; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
813 health_check match=welcome; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
814 } |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
815 } |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
816 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
817 match welcome { |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
818 status 200; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
819 header Content-Type = text/html; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
820 body ~ "Welcome to nginx!"; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
821 } |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
822 } |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
823 </example> |
1722
61aca81458a0
Corrected sentence in the upstream module.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1700
diff
changeset
|
824 This configuration shows that in order for a health check to pass, the response |
61aca81458a0
Corrected sentence in the upstream module.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1700
diff
changeset
|
825 to a health check request should succeed, |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
826 have status 200, content type “<literal>text/html</literal>”, |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
827 and contain “<literal>Welcome to nginx!</literal>” in the body. |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
828 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
829 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
830 <para> |
956
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Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
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diff
changeset
|
831 The server group must reside in the <link id="zone">shared memory</link>. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
832 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
833 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
834 <para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
835 If several health checks are defined for the same group of servers, |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
836 a single failure of any check will make the corresponding server be |
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
837 considered unhealthy. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
838 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
839 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
840 <para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
841 <note> |
1348
5e45198fa991
Documented that with health checks most variables are useless.
Ruslan Ermilov <ru@nginx.com>
parents:
1259
diff
changeset
|
842 Please note that most of the variables will have empty values |
5e45198fa991
Documented that with health checks most variables are useless.
Ruslan Ermilov <ru@nginx.com>
parents:
1259
diff
changeset
|
843 when used with health checks. |
5e45198fa991
Documented that with health checks most variables are useless.
Ruslan Ermilov <ru@nginx.com>
parents:
1259
diff
changeset
|
844 </note> |
5e45198fa991
Documented that with health checks most variables are useless.
Ruslan Ermilov <ru@nginx.com>
parents:
1259
diff
changeset
|
845 </para> |
5e45198fa991
Documented that with health checks most variables are useless.
Ruslan Ermilov <ru@nginx.com>
parents:
1259
diff
changeset
|
846 |
5e45198fa991
Documented that with health checks most variables are useless.
Ruslan Ermilov <ru@nginx.com>
parents:
1259
diff
changeset
|
847 <para> |
5e45198fa991
Documented that with health checks most variables are useless.
Ruslan Ermilov <ru@nginx.com>
parents:
1259
diff
changeset
|
848 <note> |
1128
1594ed379f1f
De-i18n'ed <commercial_version/>.
Ruslan Ermilov <ru@nginx.com>
parents:
1127
diff
changeset
|
849 This directive is available as part of our |
1594ed379f1f
De-i18n'ed <commercial_version/>.
Ruslan Ermilov <ru@nginx.com>
parents:
1127
diff
changeset
|
850 <commercial_version>commercial subscription</commercial_version>. |
953
aded7086e84f
Commercial version documentation.
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parents:
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diff
changeset
|
851 </note> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
852 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
853 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
854 </directive> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
855 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
856 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
857 <directive name="match"> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
858 <syntax block="yes"><value>name</value></syntax> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
859 <default/> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
860 <context>http</context> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
861 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
862 <para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
863 Defines the named test set used to verify responses to health check requests. |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
864 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
865 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
866 <para> |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
867 The following items can be tested in a response: |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
868 <list type="tag"> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
869 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
870 <tag-name><literal>status 200;</literal></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
871 <tag-desc>status is 200</tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
872 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
873 <tag-name><literal>status ! 500;</literal></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
874 <tag-desc>status is not 500</tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
875 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
876 <tag-name><literal>status 200 204;</literal></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
877 <tag-desc>status is 200 or 204</tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
878 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
879 <tag-name><literal>status ! 301 302;</literal></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
880 <tag-desc>status is neither 301 nor 302</tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
881 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
882 <tag-name><literal>status 200-399;</literal></tag-name> |
966 | 883 <tag-desc>status is in the range from 200 to 399</tag-desc> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
884 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
885 <tag-name><literal>status ! 400-599;</literal></tag-name> |
966 | 886 <tag-desc>status is not in the range from 400 to 599</tag-desc> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
887 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
888 <tag-name><literal>status 301-303 307;</literal></tag-name> |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
889 <tag-desc>status is either 301, 302, 303, or 307</tag-desc> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
890 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
891 </list> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
892 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
893 <list type="tag"> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
894 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
895 <tag-name><literal>header Content-Type = text/html;</literal></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
896 <tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
897 header contains <header>Content-Type</header> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
898 with value <literal>text/html</literal> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
899 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
900 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
901 <tag-name><literal>header Content-Type != text/html;</literal></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
902 <tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
903 header contains <header>Content-Type</header> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
904 with value other than <literal>text/html</literal> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
905 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
906 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
907 <tag-name><literal>header Connection ~ close;</literal></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
908 <tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
909 header contains <header>Connection</header> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
910 with value matching regular expression <literal>close</literal> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
911 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
912 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
913 <tag-name><literal>header Connection !~ close;</literal></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
914 <tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
915 header contains <header>Connection</header> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
916 with value not matching regular expression <literal>close</literal> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
917 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
918 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
919 <tag-name><literal>header Host;</literal></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
920 <tag-desc>header contains <header>Host</header></tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
921 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
922 <tag-name><literal>header ! X-Accel-Redirect;</literal></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
923 <tag-desc>header lacks <header>X-Accel-Redirect</header></tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
924 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
925 </list> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
926 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
927 <list type="tag"> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
928 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
929 <tag-name><literal>body ~ "Welcome to nginx!";</literal></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
930 <tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
931 body matches regular expression “<literal>Welcome to nginx!</literal>” |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
932 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
933 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
934 <tag-name><literal>body !~ "Welcome to nginx!";</literal></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
935 <tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
936 body does not match regular expression “<literal>Welcome to nginx!</literal>” |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
937 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
938 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
939 </list> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
940 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
941 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
942 <para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
943 If several tests are specified, |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
944 the response matches only if it matches all tests. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
945 <note> |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
946 Only the first 256k of the response body are examined. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
947 </note> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
948 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
949 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
950 <para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
951 Examples: |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
952 <example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
953 # status is 200, content type is "text/html", |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
954 # and body contains "Welcome to nginx!" |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
955 match welcome { |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
956 status 200; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
957 header Content-Type = text/html; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
958 body ~ "Welcome to nginx!"; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
959 } |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
960 </example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
961 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
962 <example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
963 # status is not one of 301, 302, 303, or 307, and header does not have "Refresh:" |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
964 match not_redirect { |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
965 status ! 301-303 307; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
966 header ! Refresh; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
967 } |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
968 </example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
969 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
970 <example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
971 # status ok and not in maintenance mode |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
972 match server_ok { |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
973 status 200-399; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
974 body !~ "maintenance mode"; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
975 } |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
976 </example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
977 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
978 </para> |
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> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
981 <note> |
1128
1594ed379f1f
De-i18n'ed <commercial_version/>.
Ruslan Ermilov <ru@nginx.com>
parents:
1127
diff
changeset
|
982 This directive is available as part of our |
1594ed379f1f
De-i18n'ed <commercial_version/>.
Ruslan Ermilov <ru@nginx.com>
parents:
1127
diff
changeset
|
983 <commercial_version>commercial subscription</commercial_version>. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
984 </note> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
985 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
986 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
987 </directive> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
988 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
989 |
1125
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
990 <directive name="queue"> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
991 <syntax> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
992 <value>number</value> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
993 [<literal>timeout</literal>=<value>time</value>]</syntax> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
994 <default/> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
995 <context>upstream</context> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
996 <appeared-in>1.5.12</appeared-in> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
997 |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
998 <para> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
999 If an upstream server cannot be selected immediately |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
1000 while processing a request, |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
1001 and there are the servers in the group that have reached the |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
1002 <link id="max_conns"/> limit, |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
1003 the request will be placed into the queue. |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
1004 The directive specifies the maximum number of requests that can be in the queue |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
1005 at the same time. |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
1006 If the queue is filled up, |
1543
08242a0abf11
Fixed grammar in the upstream queue directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1504
diff
changeset
|
1007 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
|
1008 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
|
1009 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
|
1010 error will be returned to the client. |
1125
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
1011 </para> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
1012 |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
1013 <para> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
1014 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
|
1015 </para> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
1016 |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
1017 <para> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
1018 <note> |
1128
1594ed379f1f
De-i18n'ed <commercial_version/>.
Ruslan Ermilov <ru@nginx.com>
parents:
1127
diff
changeset
|
1019 This directive is available as part of our |
1594ed379f1f
De-i18n'ed <commercial_version/>.
Ruslan Ermilov <ru@nginx.com>
parents:
1127
diff
changeset
|
1020 <commercial_version>commercial subscription</commercial_version>. |
1125
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
1021 </note> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
1022 </para> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
1023 |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
1024 </directive> |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
1025 |
9a95b9026a16
Upstream: reallocated the "queue" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
1124
diff
changeset
|
1026 |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1027 <directive name="sticky"> |
1259
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
1028 <syntax> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
1029 <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
|
1030 [<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
|
1031 [<literal>domain=</literal><value>domain</value>] |
1450
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1032 [<literal>httponly</literal>] |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1033 [<literal>secure</literal>] |
1259
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
1034 [<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
|
1035 <syntax> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
1036 <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
|
1037 <syntax> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
1038 <literal>learn</literal> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
1039 <literal>create=</literal><value>$variable</value> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
1040 <literal>lookup=</literal><value>$variable</value> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
1041 <literal>zone=</literal><value>name</value>:<value>size</value> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
1042 [<literal>timeout=</literal><value>time</value>]</syntax> |
987
edd505634357
Documented the "sticky" directive.
Vladimir Homutov <vl@nginx.com>
parents:
981
diff
changeset
|
1043 <default/> |
edd505634357
Documented the "sticky" directive.
Vladimir Homutov <vl@nginx.com>
parents:
981
diff
changeset
|
1044 <context>upstream</context> |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1045 <appeared-in>1.5.7</appeared-in> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1046 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1047 <para> |
962
f3754c623e6b
Minor editing of the stiky_cookie_insert directive.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
960
diff
changeset
|
1048 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
|
1049 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
|
1050 Three methods are available: |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
1051 <list type="tag"> |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
Ruslan Ermilov <ru@nginx.com>
parents:
1241
diff
changeset
|
1052 <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
|
1053 <tag-desc> |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1054 |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1055 <para> |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1056 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
|
1057 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
|
1058 <example> |
960
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
1059 upstream backend { |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
1060 server backend1.example.com; |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
1061 server backend2.example.com; |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
1062 |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1063 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
|
1064 } |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1065 </example> |
960
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
1066 </para> |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
1067 |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
1068 <para> |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
1069 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
|
1070 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
|
1071 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
|
1072 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
|
1073 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
|
1074 </para> |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
1075 |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
1076 <para> |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1077 The first parameter sets the name of the cookie to be set or inspected. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1078 Additional parameters may be as follows: |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1079 <list type="tag"> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1080 |
1450
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1081 <tag-name><literal>expires=</literal><value>time</value></tag-name> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1082 <tag-desc> |
1450
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1083 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
|
1084 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
|
1085 “<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
|
1086 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
|
1087 the end of a browser session. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1088 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1089 |
1450
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1090 <tag-name><literal>domain=</literal><value>domain</value></tag-name> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1091 <tag-desc> |
1450
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1092 Defines the <value>domain</value> for which the cookie is set. |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1093 </tag-desc> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1094 |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1095 <tag-name><literal>httponly</literal></tag-name> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1096 <tag-desc> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1097 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
|
1098 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1099 |
1450
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1100 <tag-name><literal>secure</literal></tag-name> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1101 <tag-desc> |
1450
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1102 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
|
1103 |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1104 </tag-desc> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1105 |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1106 <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
|
1107 <tag-desc> |
f5b5eefc43cb
Updated commercial docs for the upcoming release.
Ruslan Ermilov <ru@nginx.com>
parents:
1424
diff
changeset
|
1108 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
|
1109 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1110 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1111 </list> |
981 | 1112 If any parameters are omitted, the corresponding cookie fields are not set. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
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1113 </para> |
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1114 </tag-desc> |
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1115 |
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1116 <tag-name id="sticky_route"><literal>route</literal></tag-name> |
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1117 <tag-desc> |
953
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|
1118 |
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1119 <para> |
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1120 When the <literal>route</literal> method is used, proxied server assigns |
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1121 client a route on receipt of the first request. |
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1122 All subsequent requests from this client will carry routing information |
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1123 in a cookie or URI. |
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1124 This information is compared with the “<literal>route</literal>” parameter |
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1125 of the <link id="server"/> directive to identify the server to which the |
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1126 request should be proxied. |
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1127 If the designated server cannot process a request, the new server is |
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1128 selected by the configured balancing method as if there is no routing |
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1129 information in the request. |
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1130 </para> |
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1131 |
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1132 <para> |
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1133 The parameters of the <literal>route</literal> method specify variables that |
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1134 may contain routing information. |
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1135 The first non-empty variable is used to find the matching server. |
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1136 </para> |
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|
1137 |
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1138 <para> |
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|
1139 Example: |
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|
1140 <example> |
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1141 map $cookie_jsessionid $route_cookie { |
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1142 ~.+\.(?P<route>\w+)$ $route; |
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1143 } |
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1144 |
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1145 map $request_uri $route_uri { |
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1146 ~jsessionid=.+\.(?P<route>\w+)$ $route; |
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1147 } |
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|
1148 |
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|
1149 upstream backend { |
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|
1150 server backend1.example.com route=a; |
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|
1151 server backend2.example.com route=b; |
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|
1152 |
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|
1153 sticky route $route_cookie $route_uri; |
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|
1154 } |
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|
1155 </example> |
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|
1156 Here, the route is taken from the “<literal>JSESSIONID</literal>” cookie |
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|
1157 if present in a request. |
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|
1158 Otherwise, the route from the URI is used. |
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|
1159 </para> |
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|
1160 |
1259
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1161 </tag-desc> |
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1162 |
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1163 <tag-name id="sticky_learn"><literal>learn</literal></tag-name> |
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1164 <tag-desc> |
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1165 <para> |
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1166 When the <literal>learn</literal> method (1.7.1) is used, nginx |
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|
1167 analyzes upstream server responses and learns server-initiated sessions |
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|
1168 usually passed in an HTTP cookie. |
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|
1169 <example> |
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|
1170 upstream backend { |
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|
1171 server backend1.example.com:8080; |
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|
1172 server backend2.example.com:8081; |
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|
1173 |
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|
1174 sticky learn |
1544
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Renamed cookie in the example of the sticky directive.
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|
1175 create=$upstream_cookie_examplecookie |
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Renamed cookie in the example of the sticky directive.
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|
1176 lookup=$cookie_examplecookie |
1259
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|
1177 zone=client_sessions:1m; |
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|
1178 } |
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|
1179 </example> |
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|
1180 |
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|
1181 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>
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|
1182 cookie “<literal>EXAMPLECOOKIE</literal>” in the response. |
1259
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1183 Further requests with this cookie will be passed to the same server. |
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|
1184 If the server cannot process the request, the new server is |
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|
1185 selected as if the client has not been bound yet. |
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|
1186 </para> |
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|
1187 |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1188 <para> |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1189 The parameters <literal>create</literal> and <literal>lookup</literal> |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1190 specify variables that indicate how new sessions are created and existing |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1191 sessions are searched, respectively. |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1192 Both parameters may be specified more than once, in which case the first |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1193 non-empty variable is used. |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1194 </para> |
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|
1195 |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1196 <para> |
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|
1197 Sessions are stored in a shared memory zone, whose <value>name</value> and |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1198 <value>size</value> are configured by the <literal>zone</literal> parameter. |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1199 One megabyte zone can store about 8000 sessions on the 64-bit platform. |
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|
1200 The sessions that are not accessed during the time specified by the |
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changeset
|
1201 <literal>timeout</literal> parameter get removed from the zone. |
954dcc02cb63
Upstream: "session learn" sticky method and upstream_conf changes.
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parents:
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diff
changeset
|
1202 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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parents:
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diff
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|
1203 </para> |
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|
1204 |
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|
1205 </tag-desc> |
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|
1206 </list> |
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Upstream: "session learn" sticky method and upstream_conf changes.
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|
1207 </para> |
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|
1208 |
1026
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diff
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|
1209 <para> |
953
aded7086e84f
Commercial version documentation.
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changeset
|
1210 <note> |
1128
1594ed379f1f
De-i18n'ed <commercial_version/>.
Ruslan Ermilov <ru@nginx.com>
parents:
1127
diff
changeset
|
1211 This directive is available as part of our |
1594ed379f1f
De-i18n'ed <commercial_version/>.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
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|
1212 <commercial_version>commercial subscription</commercial_version>. |
953
aded7086e84f
Commercial version documentation.
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|
1213 </note> |
aded7086e84f
Commercial version documentation.
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changeset
|
1214 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
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diff
changeset
|
1215 |
aded7086e84f
Commercial version documentation.
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changeset
|
1216 </directive> |
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Commercial version documentation.
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|
1217 |
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|
1218 |
1026
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|
1219 <directive name="sticky_cookie_insert"> |
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diff
changeset
|
1220 <syntax><value>name</value> |
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|
1221 [<literal>expires=</literal><value>time</value>] |
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diff
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|
1222 [<literal>domain=</literal><value>domain</value>] |
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diff
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|
1223 [<literal>path=</literal><value>path</value>]</syntax> |
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diff
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|
1224 <default/> |
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diff
changeset
|
1225 <context>upstream</context> |
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diff
changeset
|
1226 |
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parents:
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diff
changeset
|
1227 <para> |
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parents:
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diff
changeset
|
1228 This directive is obsolete since version 1.5.7. |
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diff
changeset
|
1229 An equivalent |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1230 <link id="sticky"/> directive with a new syntax should be used instead: |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1231 <note> |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1232 <literal>sticky cookie</literal> <value>name</value> |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1233 [<literal>expires=</literal><value>time</value>] |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1234 [<literal>domain=</literal><value>domain</value>] |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1235 [<literal>path=</literal><value>path</value>]; |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1236 </note> |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1237 </para> |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1238 |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1239 </directive> |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
1240 |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1241 </section> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1242 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1243 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1244 <section id="variables" name="Embedded Variables"> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1245 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1246 <para> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1247 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
|
1248 supports the following embedded variables: |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1249 <list type="tag"> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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_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
|
1252 <tag-desc> |
1391
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1253 keeps the IP address and port, |
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1254 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
|
1255 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
|
1256 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
|
1257 “<literal>192.168.1.1:80, 192.168.1.2:80, unix:/tmp/sock</literal>”. |
966 | 1258 If an internal redirect from one server group to another happens, |
1259 initiated by | |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1260 <header>X-Accel-Redirect</header> or |
966 | 1261 <link doc="ngx_http_core_module.xml" id="error_page"/>, |
1262 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
|
1263 “<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>”. |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1264 </tag-desc> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1265 |
1155
07402a11fd8d
Assigned IDs to tags describing variables.
Vladimir Homutov <vl@nginx.com>
parents:
1128
diff
changeset
|
1266 <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
|
1267 </tag-name> |
731
f62328124e5b
Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents:
654
diff
changeset
|
1268 <tag-desc> |
966 | 1269 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
|
1270 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
|
1271 “<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
|
1272 “<literal>STALE</literal>”, “<literal>UPDATING</literal>”, |
1391
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1273 “<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
|
1274 </tag-desc> |
f62328124e5b
Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents:
654
diff
changeset
|
1275 |
1481
f29398a167d0
Documented the upstream_connect_time variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1461
diff
changeset
|
1276 <tag-name id="var_upstream_connect_time"><var>$upstream_connect_time</var> |
f29398a167d0
Documented the upstream_connect_time variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1461
diff
changeset
|
1277 </tag-name> |
f29398a167d0
Documented the upstream_connect_time variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1461
diff
changeset
|
1278 <tag-desc> |
f29398a167d0
Documented the upstream_connect_time variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1461
diff
changeset
|
1279 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
|
1280 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
|
1281 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
|
1282 Times of several connections |
f29398a167d0
Documented the upstream_connect_time variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1461
diff
changeset
|
1283 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
|
1284 <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
|
1285 </tag-desc> |
f29398a167d0
Documented the upstream_connect_time variable.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
1461
diff
changeset
|
1286 |
1186
8125bec5c7a1
Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1181
diff
changeset
|
1287 <tag-name id="var_upstream_cookie_"><var>$upstream_cookie_</var><value>name</value> |
8125bec5c7a1
Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1181
diff
changeset
|
1288 </tag-name> |
8125bec5c7a1
Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1181
diff
changeset
|
1289 <tag-desc> |
8125bec5c7a1
Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1181
diff
changeset
|
1290 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
|
1291 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
|
1292 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
|
1293 </tag-desc> |
8125bec5c7a1
Upstream: documented the $upstream_cookie_* variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1181
diff
changeset
|
1294 |
1393
15e8779f0ceb
Documented the $upstream_header_time variable.
Ruslan Ermilov <ru@nginx.com>
parents:
1392
diff
changeset
|
1295 <tag-name id="var_upstream_header_time"><var>$upstream_header_time</var> |
15e8779f0ceb
Documented the $upstream_header_time variable.
Ruslan Ermilov <ru@nginx.com>
parents:
1392
diff
changeset
|
1296 </tag-name> |
15e8779f0ceb
Documented the $upstream_header_time variable.
Ruslan Ermilov <ru@nginx.com>
parents:
1392
diff
changeset
|
1297 <tag-desc> |
15e8779f0ceb
Documented the $upstream_header_time variable.
Ruslan Ermilov <ru@nginx.com>
parents:
1392
diff
changeset
|
1298 keeps time |
15e8779f0ceb
Documented the $upstream_header_time variable.
Ruslan Ermilov <ru@nginx.com>
parents:
1392
diff
changeset
|
1299 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
|
1300 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
|
1301 Times of several responses |
15e8779f0ceb
Documented the $upstream_header_time variable.
Ruslan Ermilov <ru@nginx.com>
parents:
1392
diff
changeset
|
1302 are separated by commas and colons like addresses in the |
15e8779f0ceb
Documented the $upstream_header_time variable.
Ruslan Ermilov <ru@nginx.com>
parents:
1392
diff
changeset
|
1303 <link id="var_upstream_addr">$upstream_addr</link> variable. |
15e8779f0ceb
Documented the $upstream_header_time variable.
Ruslan Ermilov <ru@nginx.com>
parents:
1392
diff
changeset
|
1304 </tag-desc> |
15e8779f0ceb
Documented the $upstream_header_time variable.
Ruslan Ermilov <ru@nginx.com>
parents:
1392
diff
changeset
|
1305 |
1392
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1306 <tag-name id="var_upstream_http_"><var>$upstream_http_</var><value>name</value></tag-name> |
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1307 <tag-desc> |
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1308 keep server response header fields. |
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1309 For example, the <header>Server</header> response header field |
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1310 is available through the <var>$upstream_http_server</var> variable. |
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1311 The rules of converting header field names to variable names are the same |
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1312 as for the variables that start with the |
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1313 “<link doc="ngx_http_core_module.xml" id="var_http_">$http_</link>” prefix. |
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1314 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
|
1315 </tag-desc> |
82e62822abe8
Sorted upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1391
diff
changeset
|
1316 |
1155
07402a11fd8d
Assigned IDs to tags describing variables.
Vladimir Homutov <vl@nginx.com>
parents:
1128
diff
changeset
|
1317 <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
|
1318 </tag-name> |
731
f62328124e5b
Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents:
654
diff
changeset
|
1319 <tag-desc> |
1391
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1320 keeps the length of the response obtained from the upstream server (0.7.27); |
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1321 the length is kept in bytes. |
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1322 Lengths of several responses |
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1323 are separated by commas and colons like addresses in the |
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1324 <link id="var_upstream_addr">$upstream_addr</link> variable. |
731
f62328124e5b
Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents:
654
diff
changeset
|
1325 </tag-desc> |
f62328124e5b
Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
parents:
654
diff
changeset
|
1326 |
1155
07402a11fd8d
Assigned IDs to tags describing variables.
Vladimir Homutov <vl@nginx.com>
parents:
1128
diff
changeset
|
1327 <tag-name id="var_upstream_response_time"><var>$upstream_response_time</var> |
07402a11fd8d
Assigned IDs to tags describing variables.
Vladimir Homutov <vl@nginx.com>
parents:
1128
diff
changeset
|
1328 </tag-name> |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1329 <tag-desc> |
1391
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1330 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
|
1331 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
|
1332 Times of several responses |
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1333 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
|
1334 <link id="var_upstream_addr">$upstream_addr</link> variable. |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1335 </tag-desc> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1336 |
1155
07402a11fd8d
Assigned IDs to tags describing variables.
Vladimir Homutov <vl@nginx.com>
parents:
1128
diff
changeset
|
1337 <tag-name id="var_upstream_status"><var>$upstream_status</var></tag-name> |
293
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1338 <tag-desc> |
1391
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1339 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
|
1340 Status codes of several responses |
0702cc081c63
Revised descriptions of upstream module variables.
Ruslan Ermilov <ru@nginx.com>
parents:
1386
diff
changeset
|
1341 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
|
1342 <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
|
1343 </tag-desc> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1344 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1345 </list> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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changeset
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1346 </para> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1347 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1348 </section> |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1349 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
1350 </module> |