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annotate xml/ru/docs/http/ngx_http_upstream_conf_module.xml @ 2948:37e082fd009c

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Added TLSv1.3 to the default value of ssl_protocols and friends.
author Yaroslav Zhuravlev <yar@nginx.com>
date Fri, 10 Mar 2023 22:17:07 +0000
parents 283b1e67eaa6
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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) Nginx, Inc.
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5 -->
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6
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7 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd">
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8
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9 <module name="Модуль ngx_http_upstream_conf_module"
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10 link="/ru/docs/http/ngx_http_upstream_conf_module.html"
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11 lang="ru"
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12 rev="6">
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13
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14 <section id="summary">
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15
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16 <para>
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17 Модуль <literal>ngx_http_upstream_conf_module</literal>
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18 позволяет оперативно настраивать группы серверов
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19 при помощи простого HTTP-интерфейса без необходимости перезапуска nginx.
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20 Группа серверов
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21 <link doc="ngx_http_upstream_module.xml" id="zone">http</link>
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22 или
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23 <link doc="../stream/ngx_stream_upstream_module.xml" id="zone">stream</link>
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24 должна находиться в разделяемой памяти.
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25 <note>
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26 Этот модуль был доступен как часть
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27 <commercial_version>коммерческой подписки</commercial_version>
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28 до версии 1.13.10.
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29 Модуль был заменён модулем
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30 <link doc="ngx_http_api_module.xml">ngx_http_api_module</link>
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31 в версии 1.13.3.
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32 </note>
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33 </para>
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34
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35 </section>
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36
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37
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38 <section id="example" name="Пример конфигурации">
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39
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40 <para>
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41 <example>
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42 upstream backend {
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43 zone upstream_backend 64k;
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44
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45 ...
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46 }
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47
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48 server {
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49 location /upstream_conf {
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50 <emphasis>upstream_conf</emphasis>;
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51 allow 127.0.0.1;
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52 deny all;
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53 }
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54 }
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55 </example>
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56 </para>
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57
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58 </section>
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59
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60
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61 <section id="directives" name="Директивы">
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62
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63 <directive name="upstream_conf">
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64 <syntax/>
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65 <default/>
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66 <context>location</context>
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67
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68 <para>
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69 Активирует HTTP-интерфейс для настройки групп серверов в содержащем location.
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70 Доступ в location следует
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71 <link doc="ngx_http_core_module.xml" id="satisfy">ограничить</link>.
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72 </para>
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73
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74 <para>
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75 С помощью команд настройки можно:
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76 <list type="bullet">
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77
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78 <listitem>просматривать конфигурацию группы;</listitem>
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79
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80 <listitem>
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81 просматривать или изменять конфигурацию, а также
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82 удалять серверы;
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83 </listitem>
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84
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85 <listitem>добавлять новые серверы.</listitem>
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86
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87 </list>
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88 <note>
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89 Поскольку адреса в группе не обязаны быть уникальными,
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90 обращение к отдельным серверам в группе осуществляется по их идентификаторам.
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91 Идентификаторы назначаются автоматически и показываются при добавлении сервера
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92 или просмотре конфигурации группы.
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93 </note>
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94 </para>
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95
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96 <para>
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97 Команда настройки состоит из параметров, передаваемых в аргументах запроса,
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98 например:
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99 <example>
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100 http://127.0.0.1/upstream_conf?upstream=backend
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101 </example>
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102 </para>
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103
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104 <para>
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105 Поддерживаются следующие параметры:
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106
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107 <list type="tag" compact="no">
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108
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109 <tag-name>
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110 <literal>stream=</literal></tag-name>
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111 <tag-desc>
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112 Выбирает группу серверов
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113 <link doc="../stream/ngx_stream_upstream_module.xml">stream</link>.
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114 Если параметр не задан, будет выбрана группа серверов
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115 <link doc="ngx_http_upstream_module.xml">http</link>.
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116 </tag-desc>
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117
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118 <tag-name>
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119 <literal>upstream=</literal><value>имя</value></tag-name>
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120 <tag-desc>
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121 Выбирает группу серверов для работы.
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122 Параметр является обязательным.
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123 </tag-desc>
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124
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125 <tag-name>
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126 <literal>id=</literal><value>число</value></tag-name>
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127 <tag-desc>
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128 Выбирает сервер для просмотра, изменения или удаления.
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129 </tag-desc>
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130
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131 <tag-name>
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132 <literal>remove=</literal></tag-name>
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133 <tag-desc>
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134 Удаляет сервер из группы.
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135 </tag-desc>
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136
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137 <tag-name>
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138 <literal>add=</literal></tag-name>
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139 <tag-desc>
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140 Добавляет новый сервер в группу.
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141 </tag-desc>
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142
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143 <tag-name>
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144 <literal>backup=</literal></tag-name>
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145 <tag-desc>
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146 Необходим для добавления запасного сервера.
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147 <note>
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148 До версии 1.7.2 параметр <literal>backup=</literal> требовался
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149 также для просмотра, изменения или удаления существующих запасных серверов.
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150 </note>
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151 </tag-desc>
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152
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153 <tag-name>
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154 <literal>server=</literal><value>адрес</value></tag-name>
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155 <tag-desc>
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156 То же, что и параметр “<literal>адрес</literal>” сервера группы
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157 <link doc="ngx_http_upstream_module.xml" id="server">http</link>
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158 или
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159 <link doc="../stream/ngx_stream_upstream_module.xml" id="server">stream</link>.
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160 <para>
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161 При добавлении сервер можно задать в виде доменного имени.
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162 В этом случае любые изменения IP-адресов, соответствующих доменному имени
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163 сервера, отслеживаются и автоматически применяются к конфигурации группы
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164 без необходимости перезапуска nginx (1.7.2).
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165 Для этого в блоке
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166 <link doc="ngx_http_core_module.xml" id="resolver">http</link>
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167 или
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168 <link doc="../stream/ngx_stream_core_module.xml" id="resolver">stream</link>
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169 должна быть задана директива “<literal>resolver</literal>”.
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170 См. также параметр “<literal>resolve</literal>” сервера группы
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171 <link doc="ngx_http_upstream_module.xml" id="resolve">http</link>
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172 или
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173 <link doc="../stream/ngx_stream_upstream_module.xml" id="resolve">stream</link>.
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174 </para>
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175 </tag-desc>
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176
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177 <tag-name>
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178 <literal>service=</literal><value>имя</value></tag-name>
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179 <tag-desc>
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180 То же, что и параметр “<literal>service</literal>” сервера группы
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181 <link doc="ngx_http_upstream_module.xml" id="service">http</link>
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182 или
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183 <link doc="../stream/ngx_stream_upstream_module.xml" id="service">stream</link>
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184 (1.9.13).
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185 </tag-desc>
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186
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187 <tag-name>
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188 <literal>weight=</literal><value>число</value></tag-name>
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189 <tag-desc>
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190 То же, что и параметр “<literal>weight</literal>” сервера группы
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191 <link doc="ngx_http_upstream_module.xml" id="weight">http</link>
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192 или
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193 <link doc="../stream/ngx_stream_upstream_module.xml" id="weight">stream</link>.
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194 </tag-desc>
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195
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196 <tag-name>
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197 <literal>max_conns=</literal><value>число</value></tag-name>
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198 <tag-desc>
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199 То же, что и параметр “<literal>max_conns</literal>” сервера группы
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200 <link doc="ngx_http_upstream_module.xml" id="max_conns">http</link>
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201 или
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202 <link doc="../stream/ngx_stream_upstream_module.xml" id="max_conns">stream</link>.
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203 </tag-desc>
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204
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205 <tag-name>
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206 <literal>max_fails=</literal><value>число</value></tag-name>
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207 <tag-desc>
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208 То же, что и параметр “<literal>max_fails</literal>” сервера группы
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209 <link doc="ngx_http_upstream_module.xml" id="max_fails">http</link>
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210 или
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211 <link doc="../stream/ngx_stream_upstream_module.xml" id="max_fails">stream</link>.
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212 </tag-desc>
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213
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214 <tag-name>
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215 <literal>fail_timeout=</literal><value>время</value></tag-name>
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216 <tag-desc>
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217 То же, что и параметр “<literal>fail_timeout</literal>” сервера группы
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218 <link doc="ngx_http_upstream_module.xml" id="fail_timeout">http</link>
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219 или
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220 <link doc="../stream/ngx_stream_upstream_module.xml" id="fail_timeout">stream</link>.
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221 </tag-desc>
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222
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223 <tag-name>
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224 <literal>slow_start=</literal><value>время</value></tag-name>
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225 <tag-desc>
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226 То же, что и параметр “<literal>slow_start</literal>” сервера группы
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227 <link doc="ngx_http_upstream_module.xml" id="slow_start">http</link>
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228 или
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229 <link doc="../stream/ngx_stream_upstream_module.xml" id="slow_start">stream</link>.
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230 </tag-desc>
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231
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232 <tag-name>
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233 <literal>down=</literal></tag-name>
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234 <tag-desc>
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235 То же, что и параметр “<literal>down</literal>” сервера группы
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236 <link doc="ngx_http_upstream_module.xml" id="down">http</link>
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237 или
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238 <link doc="../stream/ngx_stream_upstream_module.xml" id="down">stream</link>.
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239 </tag-desc>
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240
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241 <tag-name id="drain"><literal>drain=</literal></tag-name>
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242 <tag-desc>
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243 Переводит сервер группы серверов
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244 <link doc="ngx_http_upstream_module.xml">http</link>
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245 в режим “draining” (1.7.5).
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246 В этом режиме на сервер будут проксироваться только
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247 <link doc="ngx_http_upstream_module.xml" id="sticky">привязанные</link>
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248 к нему запросы.
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249 </tag-desc>
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250
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251 <tag-name>
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252 <literal>up=</literal></tag-name>
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253 <tag-desc>
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254 Параметр, обратный по значению параметру “<literal>down</literal>” сервера группы
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255 <link doc="ngx_http_upstream_module.xml" id="down">http</link>
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256 или
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257 <link doc="../stream/ngx_stream_upstream_module.xml" id="down">stream</link>.
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258 </tag-desc>
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259
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260 <tag-name>
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261 <literal>route=</literal><value>строка</value></tag-name>
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262 <tag-desc>
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263 То же, что и параметр “<literal>route</literal>” сервера группы
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264 <link doc="ngx_http_upstream_module.xml" id="route">http</link>.
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265 </tag-desc>
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266
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267 </list>
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268
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269 Первые три параметра выбирают объект.
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270 Объектом может быть либо группа серверов http или stream,
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271 либо отдельный сервер.
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272 Если остальные параметры не указаны, то показывается конфигурация выбранной
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273 группы или сервера.
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274 </para>
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275
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276 <para>
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277 Например, команда для просмотра конфигурации всей группы
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278 выглядит следующим образом:
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279 <example>
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280 http://127.0.0.1/upstream_conf?upstream=backend
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281 </example>
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282
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283 Для просмотра конфигурации отдельного сервера следует указать его идентификатор:
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284 <example>
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285 http://127.0.0.1/upstream_conf?upstream=backend&amp;id=42
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286 </example>
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287 </para>
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288
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289 <para>
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290 Для добавления нового сервера в группу
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291 следует указать его адрес в параметре “<literal>server=</literal>”.
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292 Если остальные параметры не указаны, то при добавлении сервера
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293 их значения будут установлены по умолчанию (см. директиву
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294 “<literal>server</literal>” для
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295 <link doc="ngx_http_upstream_module.xml" id="server">http</link>
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296 или
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297 <link doc="../stream/ngx_stream_upstream_module.xml" id="server">stream</link>).
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298 </para>
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299
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300 <para>
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301 Например, команда для добавления нового основного сервера в группу
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302 выглядит следующим образом:
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303 <example>
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304 http://127.0.0.1/upstream_conf?add=&amp;upstream=backend&amp;server=127.0.0.1:8080
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305 </example>
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306
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307 Добавление нового запасного сервера происходит следующим образом:
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308 <example>
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309 http://127.0.0.1/upstream_conf?add=&amp;upstream=backend&amp;backup=&amp;server=127.0.0.1:8080
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310 </example>
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311
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312 Добавление нового основного сервера с нестандартными
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313 значениями параметров и с пометкой его как постоянно недоступного
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314 (“<literal>down</literal>”) происходит следующим образом:
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315 <example>
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316 http://127.0.0.1/upstream_conf?add=&amp;upstream=backend&amp;server=127.0.0.1:8080&amp;weight=2&amp;down=
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317 </example>
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318
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319 Для удаления сервера следует указать его идентификатор:
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320 <example>
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321 http://127.0.0.1/upstream_conf?remove=&amp;upstream=backend&amp;id=42
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322 </example>
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323
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324 Пометка существующего сервера как постоянно недоступного
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325 (“<literal>down</literal>”) происходит следующим образом:
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326 <example>
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327 http://127.0.0.1/upstream_conf?upstream=backend&amp;id=42&amp;down=
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328 </example>
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329
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330 Изменение адреса существующего сервера происходит следующим образом:
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331 <example>
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332 http://127.0.0.1/upstream_conf?upstream=backend&amp;id=42&amp;server=192.0.2.3:8123
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333 </example>
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334
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335 Изменение других параметров существующего сервера происходит следующим образом:
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336 <example>
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337 http://127.0.0.1/upstream_conf?upstream=backend&amp;id=42&amp;max_fails=3&amp;weight=4
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338 </example>
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339
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340 Вышеприведённые примеры актуальны для группы серверов
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341 <link doc="ngx_http_upstream_module.xml">http</link>.
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342 Аналогичные примеры для группы серверов
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343 <link doc="../stream/ngx_stream_upstream_module.xml">stream</link>
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344 требуют указания параметра “<literal>stream=</literal>”.
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345 </para>
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346
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347 </directive>
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348
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349 </section>
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350
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351 </module>