Mercurial > hg > nginx-site
annotate xml/en/docs/http/ngx_http_upstream_module.xml @ 1027:dd64ce140de2
Status: virtual servers, caches, load_timestamp.
author | Ruslan Ermilov <ru@nginx.com> |
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date | Wed, 23 Oct 2013 13:36:17 +0400 |
parents | 3056640d5022 |
children | 6c021feec587 |
rev | line source |
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English translation of the ngx_http_upstream_module documentation.
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1 <?xml version="1.0"?> |
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2 |
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3 <!-- |
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4 Copyright (C) Igor Sysoev |
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5 Copyright (C) Nginx, Inc. |
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6 --> |
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7 |
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8 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd"> |
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9 |
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10 <module name="Module ngx_http_upstream_module" |
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11 link="/en/docs/http/ngx_http_upstream_module.html" |
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13 rev="12"> |
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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"/>, | |
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21 <link doc="ngx_http_fastcgi_module.xml" id="fastcgi_pass"/>, and |
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22 <link doc="ngx_http_memcached_module.xml" id="memcached_pass"/> directives. |
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23 </para> |
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24 |
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25 </section> |
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26 |
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27 |
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28 <section id="example" name="Example Configuration"> |
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29 |
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30 <para> |
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31 <example> |
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32 upstream <emphasis>backend</emphasis> { |
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33 server backend1.example.com weight=5; |
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34 server backend2.example.com:8080; |
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35 server unix:/tmp/backend3; |
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36 |
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37 server backup1.example.com:8080 backup; |
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38 server backup2.example.com:8080 backup; |
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39 } |
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40 |
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41 server { |
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42 location / { |
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43 proxy_pass http://<emphasis>backend</emphasis>; |
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44 } |
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45 } |
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46 </example> |
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47 </para> |
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48 |
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49 <para> |
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50 Dynamically configurable group, |
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51 available as part of our <commercial_version/> only: |
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52 <example> |
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53 upstream <emphasis>appservers</emphasis> { |
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54 zone appservers 64k; |
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55 |
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56 server appserv1.example.com weight=5; |
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57 server appserv2.example.com:8080 fail_timeout=5s slow_start=30s; |
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58 server 192.0.2.1 max_fails=3; |
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59 |
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60 server reserve1.example.com:8080 backup; |
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61 server reserve2.example.com:8080 backup; |
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62 } |
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63 |
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64 server { |
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65 location / { |
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66 proxy_pass http://<emphasis>appservers</emphasis>; |
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67 health_check; |
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68 } |
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69 |
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70 location /upstream_conf { |
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71 upstream_conf; |
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72 allow 127.0.0.1; |
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73 deny all; |
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74 } |
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75 } |
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76 </example> |
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77 </para> |
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78 |
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79 </section> |
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80 |
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81 |
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82 <section id="directives" name="Directives"> |
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83 |
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84 <directive name="upstream"> |
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85 <syntax block="yes"><value>name</value></syntax> |
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86 <default/> |
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87 <context>http</context> |
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88 |
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89 <para> |
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90 Defines a group of servers. |
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91 Servers can listen on different ports. |
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92 In addition, servers listening on TCP and UNIX-domain sockets |
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93 can be mixed. |
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94 </para> |
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95 |
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96 <para> |
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97 Example: |
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98 <example> |
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99 upstream backend { |
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100 server backend1.example.com weight=5; |
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101 server 127.0.0.1:8080 max_fails=3 fail_timeout=30s; |
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102 server unix:/tmp/backend3; |
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103 } |
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104 </example> |
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105 </para> |
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106 |
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107 <para> |
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109 weighted round-robin balancing method. |
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110 In the above example, each 7 requests will be distributed as follows: |
966 | 111 5 requests go to <literal>backend1.example.com</literal> |
112 and one request to each of the second and third servers. | |
113 If an error occurs during communication with a server, the request will | |
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114 be passed to the next server, and so on until all of the functioning |
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115 servers will be tried. |
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116 If a successful response could not be obtained from any of the servers, |
966 | 117 the client will receive the result of the communication with the last server. |
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118 </para> |
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119 |
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120 </directive> |
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121 |
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122 |
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123 <directive name="server"> |
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124 <syntax><value>address</value> [<value>parameters</value>]</syntax> |
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125 <default/> |
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126 <context>upstream</context> |
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127 |
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128 <para> |
966 | 129 Defines the <value>address</value> and other <value>parameters</value> |
130 of a server. | |
131 The address can be specified as a domain name or IP address, | |
132 with an optional port, or as a UNIX-domain socket path | |
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133 specified after the “<literal>unix:</literal>” prefix. |
966 | 134 If a port is not specified, the port 80 is used. |
135 A domain name that resolves to several IP addresses defines | |
136 multiple servers at once. | |
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137 </para> |
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138 |
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139 <para> |
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140 The following parameters can be defined: |
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141 <list type="tag"> |
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142 |
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143 <tag-name><literal>weight</literal>=<value>number</value></tag-name> |
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144 <tag-desc> |
966 | 145 sets the weight of the server, by default, 1. |
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146 </tag-desc> |
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147 |
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148 <tag-name><literal>max_fails</literal>=<value>number</value></tag-name> |
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149 <tag-desc> |
966 | 150 sets the number of unsuccessful attempts to communicate with the server |
151 that should happen in the duration set by the <literal>fail_timeout</literal> | |
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152 parameter to consider the server unavailable for a duration also set by the |
966 | 153 <literal>fail_timeout</literal> parameter. |
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154 By default, the number of unsuccessful attempts is set to 1. |
966 | 155 The zero value disables the accounting of attempts. |
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156 What is considered an unsuccessful attempt is defined by the |
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157 <link doc="ngx_http_proxy_module.xml" id="proxy_next_upstream"/>, |
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158 <link doc="ngx_http_fastcgi_module.xml" id="fastcgi_next_upstream"/>, and |
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159 <link doc="ngx_http_memcached_module.xml" id="memcached_next_upstream"/> |
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160 directives. |
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161 </tag-desc> |
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162 |
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163 <tag-name><literal>fail_timeout</literal>=<value>time</value></tag-name> |
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164 <tag-desc> |
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165 sets |
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166 <list type="bullet"> |
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167 |
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168 <listitem> |
966 | 169 the time during which the specified number of unsuccessful attempts to |
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170 communicate with the server should happen to consider the server unavailable; |
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171 </listitem> |
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172 |
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173 <listitem> |
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174 and the period of time the server will be considered unavailable. |
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175 </listitem> |
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176 |
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177 </list> |
966 | 178 By default, the parameter is set to 10 seconds. |
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179 </tag-desc> |
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180 |
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181 <tag-name><literal>slow_start</literal>=<value>time</value></tag-name> |
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182 <tag-desc> |
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183 sets the <value>time</value> during which the server will recover its weight |
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184 from zero to a nominal value, when unhealthy server becomes |
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185 <link id="health_check">healthy</link>, |
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186 or when the server becomes available after a period of time |
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187 it was considered unavailable. |
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188 Default value is zero, i.e. slow start is disabled. |
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189 <note> |
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190 This functionality is available as part of our <commercial_version/> only. |
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191 </note> |
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192 </tag-desc> |
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193 |
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194 <tag-name><literal>backup</literal></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><literal>down</literal></tag-name> |
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201 <tag-desc> |
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202 marks the server as permanently unavailable; used along with |
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203 the <link id="ip_hash"/> directive. |
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204 </tag-desc> |
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205 |
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206 <tag-name><literal>route</literal>=<value>string</value></tag-name> |
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207 <tag-desc> |
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208 sets the server route name. |
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209 <note> |
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210 This functionality is available as part of our <commercial_version/> only. |
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211 </note> |
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212 </tag-desc> |
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213 |
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214 </list> |
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215 </para> |
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216 |
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217 <para> |
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218 Example: |
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219 <example> |
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220 upstream backend { |
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221 server backend1.example.com weight=5; |
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222 server 127.0.0.1:8080 max_fails=3 fail_timeout=30s; |
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223 server unix:/tmp/backend3; |
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224 |
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225 server backup1.example.com:8080 backup; |
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226 } |
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227 </example> |
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228 |
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229 <note> |
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230 If there is only a single server in a group, <literal>max_fails</literal>, |
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231 <literal>fail_timeout</literal> and <literal>slow_start</literal> parameters |
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232 are ignored, and such a server will never be considered unavailable. |
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233 </note> |
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234 </para> |
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235 |
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236 </directive> |
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237 |
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238 |
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239 <directive name="zone"> |
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240 <syntax><value>name</value> <value>size</value></syntax> |
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241 <default/> |
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242 <context>upstream</context> |
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243 |
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244 <para> |
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245 Makes the group dynamically configurable. |
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246 Defines the <value>name</value> and <value>size</value> of a shared |
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247 memory zone that keeps group’s configuration and run-time state that are |
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248 shared between worker processes. |
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249 Such groups allow to add, remove, and modify servers at run time. |
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250 The configuration is accessible via a special location handled by |
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251 <link id="upstream_conf"/>. |
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252 </para> |
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253 |
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254 <para> |
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255 <note> |
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256 This directive is available as part of our <commercial_version/> only. |
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257 </note> |
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258 </para> |
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259 |
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260 </directive> |
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261 |
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262 |
293
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263 <directive name="ip_hash"> |
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264 <syntax/> |
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265 <default/> |
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266 <context>upstream</context> |
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267 |
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268 <para> |
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269 Specifies that a group should use a load balancing method where requests |
293
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270 are distributed between servers based on client IP addresses. |
542
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271 The first three octets of the client IPv4 address, or the entire IPv6 address, |
533
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272 are used as a hashing key. |
966 | 273 The method ensures that requests from the same client will always be |
968
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274 passed to the same server except when this server is unavailable. |
966 | 275 In the latter case client requests will be passed to another server. |
276 Most probably, it will always be the same server as well. | |
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277 <note> |
566 | 278 IPv6 addresses are supported starting from versions 1.3.2 and 1.2.2. |
542
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279 </note> |
293
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280 </para> |
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281 |
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282 <para> |
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283 If one of the servers needs to be temporarily removed, it should |
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284 be marked with the <literal>down</literal> parameter in |
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285 order to preserve the current hashing of client IP addresses. |
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286 </para> |
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287 |
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288 <para> |
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289 Example: |
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290 <example> |
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291 upstream backend { |
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292 ip_hash; |
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293 |
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294 server backend1.example.com; |
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295 server backend2.example.com; |
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296 server backend3.example.com <emphasis>down</emphasis>; |
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297 server backend4.example.com; |
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298 } |
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299 </example> |
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300 </para> |
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301 |
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302 <para> |
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303 <note> |
966 | 304 Until versions 1.3.1 and 1.2.2, it was not possible to specify a weight for |
533
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305 servers using the <literal>ip_hash</literal> load balancing method. |
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306 </note> |
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307 </para> |
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308 |
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309 </directive> |
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310 |
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311 |
316
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312 <directive name="keepalive"> |
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313 <syntax><value>connections</value></syntax> |
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314 <default/> |
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315 <context>upstream</context> |
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316 <appeared-in>1.1.4</appeared-in> |
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317 |
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318 <para> |
966 | 319 Activates the cache for connections to upstream servers. |
316
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320 </para> |
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321 |
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322 <para> |
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323 The <value>connections</value> parameter sets the maximum number of |
966 | 324 idle keepalive connections to upstream servers that are preserved in |
325 the cache of each worker process. | |
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326 When this number is exceeded, the least recently used connections |
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327 are closed. |
316
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328 <note> |
966 | 329 It should be particularly noted that the <literal>keepalive</literal> directive |
330 does not limit the total number of connections to upstream servers | |
331 that an nginx worker process can open. | |
332 The <value>connections</value> parameter should be set to a number small enough | |
333 to let upstream servers process new incoming connections as well. | |
316
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334 </note> |
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335 </para> |
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336 |
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337 <para> |
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338 Example configuration of memcached upstream with keepalive connections: |
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339 <example> |
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340 upstream memcached_backend { |
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341 server 127.0.0.1:11211; |
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342 server 10.0.0.2:11211; |
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343 |
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344 keepalive 32; |
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345 } |
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346 |
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347 server { |
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348 ... |
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349 |
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350 location /memcached/ { |
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351 set $memcached_key $uri; |
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352 memcached_pass memcached_backend; |
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353 } |
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354 |
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355 } |
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356 </example> |
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357 </para> |
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358 |
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359 <para> |
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360 For HTTP, the <link doc="ngx_http_proxy_module.xml" id="proxy_http_version"/> |
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361 directive should be set to “<literal>1.1</literal>” |
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362 and the <header>Connection</header> header field should be cleared: |
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363 <example> |
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364 upstream http_backend { |
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365 server 127.0.0.1:8080; |
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366 |
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367 keepalive 16; |
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368 } |
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369 |
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370 server { |
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371 ... |
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372 |
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373 location /http/ { |
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374 proxy_pass http://http_backend; |
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375 proxy_http_version 1.1; |
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376 proxy_set_header Connection ""; |
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377 ... |
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378 } |
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379 } |
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380 </example> |
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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 Alternatively, HTTP/1.0 persistent connections can be used by passing the |
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386 <header>Connection: Keep-Alive</header> header field to an upstream server, |
966 | 387 though this method is not recommended. |
316
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388 </note> |
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389 </para> |
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390 |
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391 <para> |
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392 For FastCGI servers, it is required to set |
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393 <link doc="ngx_http_fastcgi_module.xml" id="fastcgi_keep_conn"/> |
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394 for keepalive connections to work: |
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395 <example> |
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396 upstream fastcgi_backend { |
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397 server 127.0.0.1:9000; |
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398 |
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399 keepalive 8; |
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400 } |
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401 |
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402 server { |
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403 ... |
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404 |
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405 location /fastcgi/ { |
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406 fastcgi_pass fastcgi_backend; |
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407 fastcgi_keep_conn on; |
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408 ... |
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409 } |
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410 } |
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411 </example> |
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412 </para> |
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413 |
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414 <para> |
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415 <note> |
533
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416 When using load balancer methods other than the default |
966 | 417 round-robin method, it is necessary to activate them before |
316
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418 the <literal>keepalive</literal> directive. |
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419 </note> |
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420 |
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421 <note> |
533
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422 SCGI and uwsgi protocols do not have a notion of keepalive connections. |
316
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423 </note> |
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424 </para> |
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425 |
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426 </directive> |
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|
427 |
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|
428 |
526
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429 <directive name="least_conn"> |
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430 <syntax/> |
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431 <default/> |
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432 <context>upstream</context> |
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433 <appeared-in>1.3.1</appeared-in> |
566 | 434 <appeared-in>1.2.2</appeared-in> |
526
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|
435 |
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1.3.1 changes: ip_hash+weight, least_conn.
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436 <para> |
533
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|
437 Specifies that a group should use a load balancing method where a request |
526
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438 is passed to the server with the least number of active connections, |
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439 taking into account weights of servers. |
533
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440 If there are several such servers, they are tried using a |
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441 weighted round-robin balancing method. |
293
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442 </para> |
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|
443 |
34246e706f48
English translation of the ngx_http_upstream_module documentation.
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|
444 </directive> |
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|
445 |
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|
446 |
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447 <directive name="health_check"> |
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448 <syntax> |
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449 [<literal>interval=</literal><value>time</value>] |
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450 <!-- |
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451 [<literal>jitter=</literal><value>time</value>] |
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452 --> |
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453 [<literal>fails=</literal><value>number</value>] |
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454 [<literal>passes=</literal><value>number</value>] |
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455 [<literal>uri=</literal><value>uri</value>] |
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456 [<literal>match=</literal><value>name</value>]</syntax> |
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|
457 |
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|
458 <default/> |
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|
459 <context>location</context> |
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|
460 |
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|
461 <para> |
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462 Enables periodic health checks of the servers in a |
953
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463 <link id="upstream">group</link> referenced in the surrounding location. |
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464 </para> |
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|
465 |
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466 <para> |
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467 The following optional parameters are supported: |
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|
468 <list type="bullet"> |
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|
469 |
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|
470 <listitem> |
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471 <literal>interval</literal> |
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472 sets the interval between two consecutive health checks, |
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473 by default, 5 seconds; |
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474 </listitem> |
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|
475 |
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|
476 <listitem> |
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|
477 <literal>fails</literal> |
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|
478 sets the number of consecutive failed health checks of a particular server |
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479 after which this server will be considered unhealthy, |
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|
480 by default, 1; |
953
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|
481 </listitem> |
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|
482 |
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|
483 <listitem> |
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484 <literal>passes</literal> |
956
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485 sets the number of consecutive passed health checks of a particular server |
953
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486 after which the server will be considered healthy, |
956
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|
487 by default, 1; |
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|
488 </listitem> |
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|
489 |
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|
490 <listitem> |
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491 <literal>uri</literal> |
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492 defines the URI used in health check requests, |
956
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493 by default, “<literal>/</literal>”; |
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494 </listitem> |
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|
495 |
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|
496 <listitem> |
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497 <literal>match</literal> |
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498 specifies the <literal>match</literal> block configuring the tests that a |
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499 response should pass in order for a health check to pass; |
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500 by default, the response should have status code 2xx or 3xx. |
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501 </listitem> |
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|
502 |
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503 </list> |
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504 </para> |
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|
505 |
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|
506 <para> |
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507 For example, |
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508 <example> |
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509 location / { |
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510 proxy_pass http://backend; |
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511 health_check; |
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512 } |
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513 </example> |
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514 will send “<literal>/</literal>” requests to each |
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515 server in the <literal>backend</literal> group every five seconds. |
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516 If any communication error or timeout occurs, or a |
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517 proxied server responds with the status code other than |
956
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518 2xx or 3xx, the health check will fail, and the server will |
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519 be considered unhealthy. |
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520 Client requests are not passed to unhealthy servers. |
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521 </para> |
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522 |
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523 <para> |
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524 Health checks can be configured to test the status code of a response, |
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525 presence of certain header fields and their values, |
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526 and the body contents. |
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527 Tests are configured separately using the <link id="match"/> directive |
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528 and referenced in the <literal>match</literal> parameter. |
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529 For example: |
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530 <example> |
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531 http { |
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532 server { |
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533 ... |
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534 location / { |
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535 proxy_pass http://backend; |
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536 health_check match=welcome; |
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537 } |
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538 } |
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539 |
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540 match welcome { |
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541 status 200; |
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542 header Content-Type = text/html; |
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543 body ~ "Welcome to nginx!"; |
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544 } |
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545 } |
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546 </example> |
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547 This configuration tells that for a health check to pass, the response to a |
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548 health check request should succeed, |
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549 have status 200, content type “<literal>text/html</literal>”, |
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550 and contain “<literal>Welcome to nginx!</literal>” in the body. |
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551 </para> |
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552 |
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553 <para> |
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554 The server group must reside in the <link id="zone">shared memory</link>. |
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555 </para> |
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556 |
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557 <para> |
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558 If several health checks are defined for the same group of servers, |
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559 a single failure of any check will make the corresponding server be |
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560 considered unhealthy. |
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561 </para> |
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562 |
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563 <para> |
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564 <note> |
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565 This directive is available as part of our <commercial_version/> only. |
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566 </note> |
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567 </para> |
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568 |
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569 </directive> |
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570 |
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|
571 |
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572 <directive name="match"> |
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573 <syntax block="yes"><value>name</value></syntax> |
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574 <default/> |
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575 <context>http</context> |
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576 |
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577 <para> |
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578 Defines the named test set used to verify responses to health check requests. |
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579 </para> |
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|
580 |
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581 <para> |
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582 The following items can be tested in a response: |
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583 <list type="tag"> |
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|
584 |
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585 <tag-name><literal>status 200;</literal></tag-name> |
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586 <tag-desc>status is 200</tag-desc> |
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587 |
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588 <tag-name><literal>status ! 500;</literal></tag-name> |
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589 <tag-desc>status is not 500</tag-desc> |
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590 |
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591 <tag-name><literal>status 200 204;</literal></tag-name> |
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592 <tag-desc>status is 200 or 204</tag-desc> |
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|
593 |
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594 <tag-name><literal>status ! 301 302;</literal></tag-name> |
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595 <tag-desc>status is neither 301 nor 302</tag-desc> |
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596 |
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597 <tag-name><literal>status 200-399;</literal></tag-name> |
966 | 598 <tag-desc>status is in the range from 200 to 399</tag-desc> |
953
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|
599 |
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600 <tag-name><literal>status ! 400-599;</literal></tag-name> |
966 | 601 <tag-desc>status is not in the range from 400 to 599</tag-desc> |
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602 |
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603 <tag-name><literal>status 301-303 307;</literal></tag-name> |
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604 <tag-desc>status is either 301, 302, 303, or 307</tag-desc> |
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|
605 |
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|
606 </list> |
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|
607 |
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|
608 <list type="tag"> |
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|
609 |
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|
610 <tag-name><literal>header Content-Type = text/html;</literal></tag-name> |
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|
611 <tag-desc> |
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612 header contains <header>Content-Type</header> |
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613 with value <literal>text/html</literal> |
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|
614 </tag-desc> |
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|
615 |
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|
616 <tag-name><literal>header Content-Type != text/html;</literal></tag-name> |
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617 <tag-desc> |
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618 header contains <header>Content-Type</header> |
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619 with value other than <literal>text/html</literal> |
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620 </tag-desc> |
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|
621 |
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622 <tag-name><literal>header Connection ~ close;</literal></tag-name> |
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|
623 <tag-desc> |
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624 header contains <header>Connection</header> |
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625 with value matching regular expression <literal>close</literal> |
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|
626 </tag-desc> |
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|
627 |
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|
628 <tag-name><literal>header Connection !~ close;</literal></tag-name> |
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|
629 <tag-desc> |
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630 header contains <header>Connection</header> |
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631 with value not matching regular expression <literal>close</literal> |
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|
632 </tag-desc> |
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|
633 |
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|
634 <tag-name><literal>header Host;</literal></tag-name> |
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635 <tag-desc>header contains <header>Host</header></tag-desc> |
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|
636 |
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|
637 <tag-name><literal>header ! X-Accel-Redirect;</literal></tag-name> |
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638 <tag-desc>header lacks <header>X-Accel-Redirect</header></tag-desc> |
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|
639 |
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|
640 </list> |
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|
641 |
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|
642 <list type="tag"> |
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|
643 |
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644 <tag-name><literal>body ~ "Welcome to nginx!";</literal></tag-name> |
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645 <tag-desc> |
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646 body matches regular expression “<literal>Welcome to nginx!</literal>” |
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647 </tag-desc> |
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|
648 |
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649 <tag-name><literal>body !~ "Welcome to nginx!";</literal></tag-name> |
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650 <tag-desc> |
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651 body does not match regular expression “<literal>Welcome to nginx!</literal>” |
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|
652 </tag-desc> |
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changeset
|
653 |
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changeset
|
654 </list> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
655 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
656 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
657 <para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
658 If several tests are specified, |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
659 the response matches only if it matches all tests. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
660 <note> |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
661 Only the first 256k of the response body are examined. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
662 </note> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
663 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
664 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
665 <para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
666 Examples: |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
667 <example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
668 # status is 200, content type is "text/html", |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
669 # and body contains "Welcome to nginx!" |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
670 match welcome { |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
671 status 200; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
672 header Content-Type = text/html; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
673 body ~ "Welcome to nginx!"; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
674 } |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
675 </example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
676 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
677 <example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
678 # 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
|
679 match not_redirect { |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
680 status ! 301-303 307; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
681 header ! Refresh; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
682 } |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
683 </example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
684 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
685 <example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
686 # status ok and not in maintenance mode |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
687 match server_ok { |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
688 status 200-399; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
689 body !~ "maintenance mode"; |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
690 } |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
691 </example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
692 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
693 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
694 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
695 <para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
696 <note> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
697 This directive is available as part of our <commercial_version/> only. |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
698 </note> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
699 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
700 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
701 </directive> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
702 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
703 |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
704 <directive name="sticky"> |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
705 <syntax><literal>cookie</literal> <value>name</value> |
1001
35ae9ded0465
Updated the "sticky" directive description.
Vladimir Homutov <vl@nginx.com>
parents:
988
diff
changeset
|
706 [<literal>expires=</literal><value>time</value>] |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
707 [<literal>domain=</literal><value>domain</value>] |
1001
35ae9ded0465
Updated the "sticky" directive description.
Vladimir Homutov <vl@nginx.com>
parents:
988
diff
changeset
|
708 [<literal>path=</literal><value>path</value>]</syntax> |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
709 <syntax><literal>route</literal> <value>variable</value> ...</syntax> |
987
edd505634357
Documented the "sticky" directive.
Vladimir Homutov <vl@nginx.com>
parents:
981
diff
changeset
|
710 <default/> |
edd505634357
Documented the "sticky" directive.
Vladimir Homutov <vl@nginx.com>
parents:
981
diff
changeset
|
711 <context>upstream</context> |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
712 <appeared-in>1.5.7</appeared-in> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
713 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
714 <para> |
962
f3754c623e6b
Minor editing of the stiky_cookie_insert directive.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
960
diff
changeset
|
715 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
|
716 passed to the same server in a group of servers. |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
717 Two methods are available, |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
718 <literal>cookie</literal> and <literal>route</literal>. |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
719 </para> |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
720 |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
721 <para> |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
722 When the <literal>cookie</literal> method is used, information about the |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
723 designated server is passed in an HTTP cookie: |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
724 <example> |
960
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
725 upstream backend { |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
726 server backend1.example.com; |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
727 server backend2.example.com; |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
728 |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
729 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
|
730 } |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
731 </example> |
960
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
732 </para> |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
733 |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
734 <para> |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
735 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
|
736 is passed to the server selected by the configured balancing method. |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
737 Further requests from the same client are passed to the same server. |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
738 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
|
739 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
|
740 </para> |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
741 |
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
742 <para> |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
743 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
|
744 Additional parameters may be as follows: |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
745 <list type="tag"> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
746 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
747 <tag-name><literal>expires</literal></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
748 <tag-desc> |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
749 Sets the time for which a browser should keep the cookie. |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
750 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
|
751 “<literal>31 Dec 2037 23:55:55 GMT</literal>”. |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
752 This is the maximum time understood by old browsers. |
960
48ab154edf10
Upstream: removed obsoleted directives in the "sticky" module.
Vladimir Homutov <vl@nginx.com>
parents:
956
diff
changeset
|
753 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
|
754 the end of a browser session. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
755 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
756 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
757 <tag-name><literal>domain</literal></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
758 <tag-desc> |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
759 Defines the domain for which the cookie is set. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
760 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
761 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
762 <tag-name><literal>path</literal></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
763 <tag-desc> |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
764 Defines the path for which the cookie is set. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
765 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
766 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
767 </list> |
981 | 768 If any parameters are omitted, the corresponding cookie fields are not set. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
769 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
770 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
771 <para> |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
772 When the <literal>route</literal> method is used, proxied server assigns |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
773 client a route on receipt of the first request. |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
774 All subsequent requests from this client will carry routing information |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
775 in a cookie or URI. |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
776 This information is compared with the “<literal>route</literal>” parameter |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
777 of the <link id="server"/> directive to identify the server to which the |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
778 request should be proxied. |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
779 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
|
780 selected by the configured balancing method as if there is no routing |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
781 information in the request. |
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782 </para> |
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|
783 |
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|
784 <para> |
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|
785 The parameters of the <literal>route</literal> method specify variables that |
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|
786 may contain routing information. |
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|
787 The first non-empty variable is used to find the matching server. |
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|
788 </para> |
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|
789 |
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|
790 <para> |
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|
791 Example: |
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|
792 <example> |
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|
793 map $cookie_jsessionid $route_cookie { |
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|
794 ~.+\.(?P<route>\w+)$ $route; |
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|
795 } |
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|
796 |
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|
797 map $request_uri $route_uri { |
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|
798 ~jsessionid=.+\.(?P<route>\w+)$ $route; |
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|
799 } |
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|
800 |
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|
801 upstream backend { |
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|
802 server backend1.example.com route=a; |
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|
803 server backend2.example.com route=b; |
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|
804 |
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changeset
|
805 sticky route $route_cookie $route_uri; |
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diff
changeset
|
806 } |
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diff
changeset
|
807 </example> |
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diff
changeset
|
808 Here, the route is taken from the “<literal>JSESSIONID</literal>” cookie |
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parents:
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|
809 if present in a request. |
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|
810 Otherwise, the route from the URI is used. |
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|
811 </para> |
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|
812 |
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|
813 <para> |
953
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|
814 <note> |
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|
815 This directive is available as part of our <commercial_version/> only. |
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|
816 </note> |
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|
817 </para> |
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Commercial version documentation.
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|
818 |
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changeset
|
819 </directive> |
aded7086e84f
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changeset
|
820 |
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Commercial version documentation.
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|
821 |
1026
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diff
changeset
|
822 <directive name="sticky_cookie_insert"> |
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parents:
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changeset
|
823 <syntax><value>name</value> |
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|
824 [<literal>expires=</literal><value>time</value>] |
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|
825 [<literal>domain=</literal><value>domain</value>] |
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changeset
|
826 [<literal>path=</literal><value>path</value>]</syntax> |
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diff
changeset
|
827 <default/> |
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parents:
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diff
changeset
|
828 <context>upstream</context> |
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|
829 |
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diff
changeset
|
830 <para> |
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parents:
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changeset
|
831 This directive is obsolete since version 1.5.7. |
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diff
changeset
|
832 An equivalent |
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Upstream: documented new "sticky" features.
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changeset
|
833 <link id="sticky"/> directive with a new syntax should be used instead: |
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|
834 <note> |
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|
835 <literal>sticky cookie</literal> <value>name</value> |
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|
836 [<literal>expires=</literal><value>time</value>] |
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|
837 [<literal>domain=</literal><value>domain</value>] |
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|
838 [<literal>path=</literal><value>path</value>]; |
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|
839 </note> |
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diff
changeset
|
840 </para> |
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diff
changeset
|
841 |
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diff
changeset
|
842 </directive> |
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parents:
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diff
changeset
|
843 |
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changeset
|
844 |
953
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|
845 <directive name="upstream_conf"> |
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Commercial version documentation.
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|
846 <syntax/> |
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Commercial version documentation.
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parents:
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diff
changeset
|
847 <default/> |
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Commercial version documentation.
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parents:
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diff
changeset
|
848 <context>location</context> |
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Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
849 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
850 <para> |
956
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Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
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diff
changeset
|
851 Turns on the HTTP interface of upstream configuration in the surrounding |
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
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diff
changeset
|
852 location. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
853 Access to this location should be |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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changeset
|
854 <link doc="ngx_http_core_module.xml" id="satisfy">limited</link>. |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
855 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
856 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
857 <para> |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
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diff
changeset
|
858 Configuration commands can be used to: |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
859 <list type="bullet"> |
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Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
860 |
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Commercial version documentation.
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parents:
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diff
changeset
|
861 <listitem>view all primary or backup servers in a group;</listitem> |
aded7086e84f
Commercial version documentation.
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parents:
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diff
changeset
|
862 |
aded7086e84f
Commercial version documentation.
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parents:
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diff
changeset
|
863 <listitem>view an individual server;</listitem> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
864 |
aded7086e84f
Commercial version documentation.
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parents:
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diff
changeset
|
865 <listitem>modify an individual server;</listitem> |
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Commercial version documentation.
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changeset
|
866 |
956
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Text revision of commercial modules.
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parents:
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diff
changeset
|
867 <listitem>add a new server (see the note below);</listitem> |
953
aded7086e84f
Commercial version documentation.
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parents:
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changeset
|
868 |
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Commercial version documentation.
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parents:
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diff
changeset
|
869 <listitem>remove an individual server.</listitem> |
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Commercial version documentation.
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diff
changeset
|
870 |
aded7086e84f
Commercial version documentation.
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parents:
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diff
changeset
|
871 </list> |
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Commercial version documentation.
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parents:
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diff
changeset
|
872 <note> |
956
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Text revision of commercial modules.
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diff
changeset
|
873 As noted in the <link id="server"/> directive, specifying a server |
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
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diff
changeset
|
874 as a domain name may result in several servers being added to the group. |
953
aded7086e84f
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diff
changeset
|
875 Since addresses in a group are not required to be unique, individual |
aded7086e84f
Commercial version documentation.
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parents:
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changeset
|
876 servers in a group can be uniquely referenced to only by their ID. |
956
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Text revision of commercial modules.
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parents:
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diff
changeset
|
877 IDs are assigned automatically and shown on viewing of the group configuration. |
953
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Commercial version documentation.
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changeset
|
878 </note> |
aded7086e84f
Commercial version documentation.
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parents:
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diff
changeset
|
879 </para> |
aded7086e84f
Commercial version documentation.
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parents:
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diff
changeset
|
880 |
aded7086e84f
Commercial version documentation.
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parents:
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diff
changeset
|
881 <para> |
956
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Text revision of commercial modules.
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parents:
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diff
changeset
|
882 A configuration command consists of parameters passed as request arguments, |
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
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diff
changeset
|
883 for example: |
953
aded7086e84f
Commercial version documentation.
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parents:
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diff
changeset
|
884 <example> |
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parents:
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diff
changeset
|
885 http://127.0.0.1/upstream_conf?upstream=appservers |
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Commercial version documentation.
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parents:
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diff
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|
886 </example> |
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parents:
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diff
changeset
|
887 </para> |
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Commercial version documentation.
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parents:
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diff
changeset
|
888 |
aded7086e84f
Commercial version documentation.
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parents:
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diff
changeset
|
889 <para> |
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Commercial version documentation.
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parents:
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diff
changeset
|
890 The following parameters are supported: |
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Commercial version documentation.
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parents:
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diff
changeset
|
891 |
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Commercial version documentation.
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parents:
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diff
changeset
|
892 <list type="tag" compact="no"> |
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Commercial version documentation.
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parents:
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diff
changeset
|
893 |
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parents:
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diff
changeset
|
894 <tag-name> |
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parents:
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changeset
|
895 <literal>upstream=</literal><value>name</value></tag-name> |
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Commercial version documentation.
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parents:
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|
896 <tag-desc> |
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parents:
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diff
changeset
|
897 Selects a group. |
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Commercial version documentation.
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parents:
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diff
changeset
|
898 This parameter is mandatory. |
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Commercial version documentation.
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changeset
|
899 </tag-desc> |
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Commercial version documentation.
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parents:
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diff
changeset
|
900 |
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Commercial version documentation.
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parents:
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diff
changeset
|
901 <tag-name> |
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parents:
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diff
changeset
|
902 <literal>backup=</literal> |
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Commercial version documentation.
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parents:
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diff
changeset
|
903 </tag-name> |
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diff
changeset
|
904 <tag-desc> |
956
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diff
changeset
|
905 If not set, selects primary servers in the group. |
953
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diff
changeset
|
906 If set, selects backup servers in the group. |
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Commercial version documentation.
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parents:
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diff
changeset
|
907 </tag-desc> |
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Commercial version documentation.
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parents:
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diff
changeset
|
908 |
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diff
changeset
|
909 <tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
910 <literal>id=</literal><value>number</value></tag-name> |
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 Selects an individual primary or backup server in the group. |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
913 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
914 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
915 <tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
916 <literal>remove=</literal></tag-name> |
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 Removes an individual primary or backup server from the group. |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
919 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
920 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
921 <tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
922 <literal>add=</literal></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
923 <tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
924 Adds a new primary or backup server to the group. |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
925 </tag-desc> |
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 <tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
928 <literal>server=</literal><value>address</value></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
929 <tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
930 Same as the “<literal>address</literal>” parameter |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
931 of the <link id="server"/> directive. |
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> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
935 <literal>weight=</literal><value>number</value></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
936 <tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
937 Same as the “<literal>weight</literal>” parameter |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
938 of the <link id="server"/> directive. |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
939 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
940 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
941 <tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
942 <literal>max_fails=</literal><value>number</value></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
943 <tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
944 Same as the “<literal>max_fails</literal>” parameter |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
945 of the <link id="server"/> directive. |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
946 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
947 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
948 <tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
949 <literal>fail_timeout=</literal><value>time</value></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
950 <tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
951 Same as the “<literal>fail_timeout</literal>” parameter |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
952 of the <link id="server"/> directive. |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
953 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
954 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
955 <tag-name> |
955
28d580f1eb63
Documented the "slow_start" parameter of the upstream "server" directive.
Vladimir Homutov <vl@nginx.com>
parents:
953
diff
changeset
|
956 <literal>slow_start=</literal><value>time</value></tag-name> |
28d580f1eb63
Documented the "slow_start" parameter of the upstream "server" directive.
Vladimir Homutov <vl@nginx.com>
parents:
953
diff
changeset
|
957 <tag-desc> |
28d580f1eb63
Documented the "slow_start" parameter of the upstream "server" directive.
Vladimir Homutov <vl@nginx.com>
parents:
953
diff
changeset
|
958 Same as the “<literal>slow_start</literal>” parameter |
28d580f1eb63
Documented the "slow_start" parameter of the upstream "server" directive.
Vladimir Homutov <vl@nginx.com>
parents:
953
diff
changeset
|
959 of the <link id="server"/> directive. |
28d580f1eb63
Documented the "slow_start" parameter of the upstream "server" directive.
Vladimir Homutov <vl@nginx.com>
parents:
953
diff
changeset
|
960 </tag-desc> |
28d580f1eb63
Documented the "slow_start" parameter of the upstream "server" directive.
Vladimir Homutov <vl@nginx.com>
parents:
953
diff
changeset
|
961 |
28d580f1eb63
Documented the "slow_start" parameter of the upstream "server" directive.
Vladimir Homutov <vl@nginx.com>
parents:
953
diff
changeset
|
962 <tag-name> |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
963 <literal>down=</literal></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
964 <tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
965 Same as the “<literal>down</literal>” parameter |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
966 of the <link id="server"/> directive. |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
967 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
968 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
969 <tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
970 <literal>up=</literal></tag-name> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
971 <tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
972 The opposite of the “<literal>down</literal>” parameter |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
973 of the <link id="server"/> directive. |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
974 </tag-desc> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
975 |
1026
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
976 <tag-name> |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
977 <literal>route=</literal><value>string</value></tag-name> |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
978 <tag-desc> |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
979 Same as the “<literal>route</literal>” parameter |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
980 of the <link id="server"/> directive. |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
981 </tag-desc> |
3056640d5022
Upstream: documented new "sticky" features.
Ruslan Ermilov <ru@nginx.com>
parents:
1011
diff
changeset
|
982 |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
983 </list> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
984 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
985 The first three parameters select a target the command applies to. |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
986 Without other parameters, the command shows configuration of the selected |
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
987 target. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
988 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
989 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
990 <para> |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
991 For example, to view the primary servers in the group, send: |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
992 <example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
993 http://127.0.0.1/upstream_conf?upstream=appservers |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
994 </example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
995 |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
996 To view the backup servers in the group, send: |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
997 <example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
998 http://127.0.0.1/upstream_conf?upstream=appservers&backup= |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
999 </example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1000 |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
1001 To view an individual primary server in the group, send: |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1002 <example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1003 http://127.0.0.1/upstream_conf?upstream=appservers&id=42 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1004 </example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1005 |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
1006 To view an individual backup server in the group, send: |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1007 <example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1008 http://127.0.0.1/upstream_conf?upstream=appservers&backup=&id=42 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1009 </example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1010 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1011 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1012 <para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1013 To add a new primary or backup server to the group, |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
1014 specify its address in the “<literal>server=</literal>” parameter. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1015 Without other parameters specified, a server will be added with other |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1016 parameters set to their default values (see the <link id="server"/> directive). |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1017 </para> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1018 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1019 <para> |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
1020 For example, to add a new primary server to the group, send: |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1021 <example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1022 http://127.0.0.1/upstream_conf?add=&upstream=appservers&server=127.0.0.1:8080 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1023 </example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1024 |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
changeset
|
1025 To add a new backup server to the group, send: |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1026 <example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1027 http://127.0.0.1/upstream_conf?add=&upstream=appservers&backup=&server=127.0.0.1:8080 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1028 </example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1029 |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1030 To add a new primary server to the group, |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1031 set its parameters to non-default values |
968
fa19bacf6e1e
Unified upstream server up/down state terminology.
Vladimir Homutov <vl@nginx.com>
parents:
966
diff
changeset
|
1032 and mark it as “<literal>down</literal>”, send: |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1033 <example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1034 http://127.0.0.1/upstream_conf?add=&upstream=appservers&server=127.0.0.1:8080&weight=2&max_fails=3&fail_timeout=3s&down= |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
942
diff
changeset
|
1035 </example> |
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
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|
1036 </para> |
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|
1037 |
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Commercial version documentation.
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|
1038 <para> |
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Ruslan Ermilov <ru@nginx.com>
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|
1039 To remove an individual primary or backup server from the group, |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
955
diff
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|
1040 select it with the <literal>id=</literal> parameter. |
953
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Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
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diff
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|
1041 </para> |
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Ruslan Ermilov <ru@nginx.com>
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|
1042 |
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|
1043 <para> |
956
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Text revision of commercial modules.
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diff
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|
1044 For example, to remove an individual primary server from the group, send: |
953
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Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
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|
1045 <example> |
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parents:
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|
1046 http://127.0.0.1/upstream_conf?remove=&upstream=appservers&id=42 |
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Ruslan Ermilov <ru@nginx.com>
parents:
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|
1047 </example> |
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|
1048 |
956
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Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
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diff
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|
1049 To remove an individual backup server from the group, send: |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
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|
1050 <example> |
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parents:
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|
1051 http://127.0.0.1/upstream_conf?remove=&upstream=appservers&backup=&id=42 |
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Commercial version documentation.
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|
1052 </example> |
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|
1053 </para> |
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|
1054 |
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|
1055 <para> |
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|
1056 To modify an individual primary or backup server in the group, |
956
488a3f738db0
Text revision of commercial modules.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
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diff
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|
1057 select it with the <literal>id=</literal> parameter. |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
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|
1058 </para> |
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diff
changeset
|
1059 |
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|
1060 <para> |
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|
1061 For example, to modify an individual primary server in the group |
956
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|
1062 by marking it as “<literal>down</literal>”, send: |
953
aded7086e84f
Commercial version documentation.
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parents:
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diff
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|
1063 <example> |
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parents:
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|
1064 http://127.0.0.1/upstream_conf?upstream=appservers&id=42&down= |
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Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
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|
1065 </example> |
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Commercial version documentation.
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|
1066 |
956
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|
1067 To modify the address of an individual backup server in the group, send: |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
1068 <example> |
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|
1069 http://127.0.0.1/upstream_conf?upstream=appservers&backup=&id=42&server=192.0.2.3:8123 |
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Ruslan Ermilov <ru@nginx.com>
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|
1070 </example> |
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Ruslan Ermilov <ru@nginx.com>
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|
1071 |
956
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|
1072 To modify other parameters of an individual primary server in the group, send: |
953
aded7086e84f
Commercial version documentation.
Ruslan Ermilov <ru@nginx.com>
parents:
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|
1073 <example> |
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Commercial version documentation.
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|
1074 http://127.0.0.1/upstream_conf?upstream=appservers&id=42&max_fails=3&weight=4 |
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diff
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|
1075 </example> |
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Commercial version documentation.
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|
1076 |
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Commercial version documentation.
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diff
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|
1077 </para> |
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Commercial version documentation.
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diff
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|
1078 |
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Commercial version documentation.
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|
1079 <para> |
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diff
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|
1080 <note> |
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Commercial version documentation.
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|
1081 This directive is available as part of our <commercial_version/> only. |
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Commercial version documentation.
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parents:
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diff
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|
1082 </note> |
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Commercial version documentation.
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parents:
942
diff
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|
1083 </para> |
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Commercial version documentation.
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diff
changeset
|
1084 |
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Commercial version documentation.
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diff
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|
1085 </directive> |
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|
1086 |
293
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|
1087 </section> |
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|
1088 |
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English translation of the ngx_http_upstream_module documentation.
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|
1089 |
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English translation of the ngx_http_upstream_module documentation.
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|
1090 <section id="variables" name="Embedded Variables"> |
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English translation of the ngx_http_upstream_module documentation.
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|
1091 |
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|
1092 <para> |
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|
1093 The <literal>ngx_http_upstream_module</literal> module |
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|
1094 supports the following embedded variables: |
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English translation of the ngx_http_upstream_module documentation.
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|
1095 <list type="tag"> |
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English translation of the ngx_http_upstream_module documentation.
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|
1096 |
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|
1097 <tag-name><var>$upstream_addr</var></tag-name> |
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|
1098 <tag-desc> |
966 | 1099 keeps the IP address and port of the server, |
1100 or the path to the UNIX-domain socket. | |
293
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|
1101 If several servers were contacted during request processing, |
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|
1102 their addresses are separated by commas, e.g. |
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|
1103 “<literal>192.168.1.1:80, 192.168.1.2:80, unix:/tmp/sock</literal>”. |
966 | 1104 If an internal redirect from one server group to another happens, |
1105 initiated by | |
293
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|
1106 <header>X-Accel-Redirect</header> or |
966 | 1107 <link doc="ngx_http_core_module.xml" id="error_page"/>, |
1108 then the server addresses from different groups are separated by colons, e.g. | |
293
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|
1109 “<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>”. |
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|
1110 </tag-desc> |
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|
1111 |
731
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|
1112 <tag-name><var>$upstream_cache_status</var></tag-name> |
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Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
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|
1113 <tag-desc> |
966 | 1114 keeps the status of accessing a response cache (0.8.3). |
1115 The status can be either “<literal>MISS</literal>”, | |
731
f62328124e5b
Documented $upstream_cache_status and $upstream_response_length variables.
Vladimir Homutov <vl@nginx.com>
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|
1116 “<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
|
1117 “<literal>STALE</literal>”, “<literal>UPDATING</literal>”, |
2ad2f30efdf2
Documented the "fastcgi_" and "proxy_cache_revalidate" directives.
Vladimir Homutov <vl@nginx.com>
parents:
1003
diff
changeset
|
1118 “<literal>REVALIDATED</literal>” or “<literal>HIT</literal>”. |
731
f62328124e5b
Documented $upstream_cache_status and $upstream_response_length variables.
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|
1119 </tag-desc> |
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|
1120 |
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Documented $upstream_cache_status and $upstream_response_length variables.
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|
1121 <tag-name><var>$upstream_response_length</var></tag-name> |
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Documented $upstream_cache_status and $upstream_response_length variables.
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|
1122 <tag-desc> |
966 | 1123 keeps the lengths of responses obtained from the upstream servers (0.7.27); |
731
f62328124e5b
Documented $upstream_cache_status and $upstream_response_length variables.
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|
1124 lengths are kept in bytes. |
966 | 1125 Several response lengths are separated by commas and colons |
1126 like addresses in the <var>$upstream_addr</var> variable. | |
731
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Documented $upstream_cache_status and $upstream_response_length variables.
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|
1127 </tag-desc> |
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|
1128 |
293
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1129 <tag-name><var>$upstream_response_time</var></tag-name> |
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|
1130 <tag-desc> |
731
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|
1131 keeps times of responses obtained from upstream servers; |
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|
1132 times are kept in seconds with a milliseconds resolution. |
966 | 1133 Several response times are separated by commas and colons |
1134 like addresses in the <var>$upstream_addr</var> variable. | |
293
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1135 </tag-desc> |
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|
1136 |
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|
1137 <tag-name><var>$upstream_status</var></tag-name> |
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1138 <tag-desc> |
731
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|
1139 keeps codes of responses obtained from upstream servers. |
966 | 1140 Several response codes are separated by commas and colons |
1141 like addresses in the <var>$upstream_addr</var> variable. | |
293
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1142 </tag-desc> |
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|
1143 |
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|
1144 <tag-name><var>$upstream_http_...</var></tag-name> |
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|
1145 <tag-desc> |
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|
1146 keep server response header fields. |
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|
1147 For example, the <header>Server</header> response header field |
966 | 1148 is available through the <var>$upstream_http_server</var> variable. |
731
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|
1149 The rules of converting header field names to variable names are the same |
966 | 1150 as for the variables that start with the |
731
f62328124e5b
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|
1151 “<link doc="ngx_http_core_module.xml" id="variables">$http_</link>” prefix. |
f62328124e5b
Documented $upstream_cache_status and $upstream_response_length variables.
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|
1152 Only the last server’s response header fields are saved. |
293
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1153 </tag-desc> |
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|
1154 |
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|
1155 </list> |
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|
1156 </para> |
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|
1157 |
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|
1158 </section> |
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|
1159 |
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1160 </module> |