Mercurial > hg > nginx-site
annotate xml/ru/docs/http/ngx_http_upstream_conf_module.xml @ 1950:ef22a80a2696
Described the "checking" state in "health_check mandatory"
author | Yaroslav Zhuravlev <yar@nginx.com> |
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date | Thu, 30 Mar 2017 21:26:44 +0300 |
parents | 57c3f36b3b6a |
children | 5c55b7054b58 |
rev | line source |
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222
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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" |
589 | 11 lang="ru" |
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12 rev="3"> |
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13 |
110
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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 </para> |
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26 |
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27 <para> |
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28 <note> |
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29 Модуль доступен как часть |
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30 <commercial_version>коммерческой подписки</commercial_version>. |
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31 </note> |
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32 </para> |
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33 |
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34 </section> |
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35 |
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36 |
292 | 37 <section id="example" name="Пример конфигурации"> |
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38 |
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39 <para> |
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40 <example> |
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41 upstream backend { |
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42 zone upstream_backend 64k; |
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43 |
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44 ... |
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45 } |
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46 |
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47 server { |
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48 location /upstream_conf { |
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49 <emphasis>upstream_conf</emphasis>; |
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50 allow 127.0.0.1; |
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51 deny all; |
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52 } |
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53 } |
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54 </example> |
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55 </para> |
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56 |
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57 </section> |
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58 |
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292 | 60 <section id="directives" name="Директивы"> |
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61 |
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62 <directive name="upstream_conf"> |
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63 <syntax/> |
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64 <default/> |
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65 <context>location</context> |
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66 |
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67 <para> |
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68 Активирует HTTP-интерфейс для настройки групп серверов в содержащем location. |
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69 Доступ в location следует |
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70 <link doc="ngx_http_core_module.xml" id="satisfy">ограничить</link>. |
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71 </para> |
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72 |
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73 <para> |
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74 С помощью команд настройки можно: |
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75 <list type="bullet"> |
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76 |
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77 <listitem>просматривать конфигурацию группы;</listitem> |
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78 |
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79 <listitem> |
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80 просматривать или изменять конфигурацию, а также |
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81 удалять серверы; |
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82 </listitem> |
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83 |
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84 <listitem>добавлять новые серверы.</listitem> |
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85 |
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86 </list> |
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87 <note> |
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88 Поскольку адреса в группе не обязаны быть уникальными, |
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89 обращение к отдельным серверам в группе осуществляется по их идентификаторам. |
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90 Идентификаторы назначаются автоматически и показываются при добавлении сервера |
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91 или просмотре конфигурации группы. |
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92 </note> |
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93 </para> |
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94 |
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95 <para> |
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96 Команда настройки состоит из параметров, передаваемых в аргументах запроса, |
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97 например: |
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98 <example> |
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99 http://127.0.0.1/upstream_conf?upstream=backend |
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100 </example> |
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101 </para> |
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102 |
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103 <para> |
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104 Поддерживаются следующие параметры: |
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105 |
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106 <list type="tag" compact="no"> |
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107 |
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108 <tag-name> |
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109 <literal>stream=</literal></tag-name> |
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110 <tag-desc> |
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111 Выбирает группу серверов |
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112 <link doc="../stream/ngx_stream_upstream_module.xml">stream</link>. |
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113 Если параметр не задан, будет выбрана группа серверов |
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114 <link doc="ngx_http_upstream_module.xml">http</link>. |
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115 </tag-desc> |
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116 |
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117 <tag-name> |
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118 <literal>upstream=</literal><value>имя</value></tag-name> |
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119 <tag-desc> |
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120 Выбирает группу серверов для работы. |
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121 Параметр является обязательным. |
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122 </tag-desc> |
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123 |
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124 <tag-name> |
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125 <literal>id=</literal><value>число</value></tag-name> |
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126 <tag-desc> |
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127 Выбирает сервер для просмотра, изменения или удаления. |
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128 </tag-desc> |
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129 |
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130 <tag-name> |
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131 <literal>remove=</literal></tag-name> |
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132 <tag-desc> |
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133 Удаляет сервер из группы. |
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134 </tag-desc> |
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135 |
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136 <tag-name> |
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137 <literal>add=</literal></tag-name> |
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138 <tag-desc> |
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139 Добавляет новый сервер в группу. |
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140 </tag-desc> |
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141 |
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142 <tag-name> |
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143 <literal>backup=</literal></tag-name> |
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144 <tag-desc> |
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145 Необходим для добавления запасного сервера. |
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146 <note> |
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147 До версии 1.7.2 параметр <literal>backup=</literal> требовался |
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148 также для просмотра, изменения или удаления существующих запасных серверов. |
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149 </note> |
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150 </tag-desc> |
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151 |
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152 <tag-name> |
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153 <literal>server=</literal><value>адрес</value></tag-name> |
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154 <tag-desc> |
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155 То же, что и параметр “<literal>адрес</literal>” сервера группы |
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156 <link doc="ngx_http_upstream_module.xml" id="server">http</link> |
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157 или |
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158 <link doc="../stream/ngx_stream_upstream_module.xml" id="server">stream</link>. |
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159 <para> |
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160 При добавлении сервер можно задать в виде доменного имени. |
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161 В этом случае любые изменения IP-адресов, соответствующих доменному имени |
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162 сервера, отслеживаются и автоматически применяются к конфигурации группы |
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163 без необходимости перезапуска nginx (1.7.2). |
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164 Для этого в блоке |
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165 <link doc="ngx_http_core_module.xml" id="resolver">http</link> |
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166 или |
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167 <link doc="../stream/ngx_stream_core_module.xml" id="resolver">stream</link> |
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168 должна быть задана директива “<literal>resolver</literal>”. |
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169 См. также параметр “<literal>resolve</literal>” сервера группы |
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170 <link doc="ngx_http_upstream_module.xml" id="resolve">http</link> |
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171 или |
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172 <link doc="../stream/ngx_stream_upstream_module.xml" id="resolve">stream</link>. |
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173 </para> |
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174 </tag-desc> |
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175 |
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176 <tag-name> |
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177 <literal>service=</literal><value>имя</value></tag-name> |
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178 <tag-desc> |
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179 То же, что и параметр “<literal>service</literal>” сервера группы |
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180 <link doc="ngx_http_upstream_module.xml" id="service">http</link> |
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181 или |
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182 <link doc="../stream/ngx_stream_upstream_module.xml" id="service">stream</link> |
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183 (1.9.13). |
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184 </tag-desc> |
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185 |
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186 <tag-name> |
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187 <literal>weight=</literal><value>число</value></tag-name> |
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188 <tag-desc> |
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189 То же, что и параметр “<literal>weight</literal>” сервера группы |
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190 <link doc="ngx_http_upstream_module.xml" id="weight">http</link> |
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191 или |
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192 <link doc="../stream/ngx_stream_upstream_module.xml" id="weight">stream</link>. |
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193 </tag-desc> |
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194 |
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195 <tag-name> |
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196 <literal>max_conns=</literal><value>число</value></tag-name> |
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197 <tag-desc> |
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198 То же, что и параметр “<literal>max_conns</literal>” сервера группы |
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199 <link doc="ngx_http_upstream_module.xml" id="max_conns">http</link> |
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200 или |
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201 <link doc="../stream/ngx_stream_upstream_module.xml" id="max_conns">stream</link>. |
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202 </tag-desc> |
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203 |
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204 <tag-name> |
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205 <literal>max_fails=</literal><value>число</value></tag-name> |
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206 <tag-desc> |
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207 То же, что и параметр “<literal>max_fails</literal>” сервера группы |
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208 <link doc="ngx_http_upstream_module.xml" id="max_fails">http</link> |
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209 или |
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210 <link doc="../stream/ngx_stream_upstream_module.xml" id="max_fails">stream</link>. |
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211 </tag-desc> |
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212 |
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213 <tag-name> |
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214 <literal>fail_timeout=</literal><value>время</value></tag-name> |
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215 <tag-desc> |
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216 То же, что и параметр “<literal>fail_timeout</literal>” сервера группы |
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217 <link doc="ngx_http_upstream_module.xml" id="fail_timeout">http</link> |
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218 или |
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219 <link doc="../stream/ngx_stream_upstream_module.xml" id="fail_timeout">stream</link>. |
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220 </tag-desc> |
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221 |
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222 <tag-name> |
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223 <literal>slow_start=</literal><value>время</value></tag-name> |
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224 <tag-desc> |
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225 То же, что и параметр “<literal>slow_start</literal>” сервера группы |
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226 <link doc="ngx_http_upstream_module.xml" id="slow_start">http</link> |
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227 или |
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228 <link doc="../stream/ngx_stream_upstream_module.xml" id="slow_start">stream</link>. |
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229 </tag-desc> |
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230 |
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231 <tag-name> |
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232 <literal>down=</literal></tag-name> |
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233 <tag-desc> |
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234 То же, что и параметр “<literal>down</literal>” сервера группы |
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235 <link doc="ngx_http_upstream_module.xml" id="down">http</link> |
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236 или |
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237 <link doc="../stream/ngx_stream_upstream_module.xml" id="down">stream</link>. |
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238 </tag-desc> |
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239 |
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240 <tag-name id="drain"><literal>drain=</literal></tag-name> |
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241 <tag-desc> |
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242 Переводит сервер группы серверов |
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243 <link doc="ngx_http_upstream_module.xml">http</link> |
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244 в режим “draining” (1.7.5). |
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245 В этом режиме на сервер будут проксироваться только |
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246 <link doc="ngx_http_upstream_module.xml" id="sticky">привязанные</link> |
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247 к нему запросы. |
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248 </tag-desc> |
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249 |
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250 <tag-name> |
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251 <literal>up=</literal></tag-name> |
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252 <tag-desc> |
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253 Параметр, обратный по значению параметру “<literal>down</literal>” сервера группы |
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254 <link doc="ngx_http_upstream_module.xml" id="down">http</link> |
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255 или |
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256 <link doc="../stream/ngx_stream_upstream_module.xml" id="down">stream</link>. |
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257 </tag-desc> |
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258 |
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259 <tag-name> |
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260 <literal>route=</literal><value>строка</value></tag-name> |
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261 <tag-desc> |
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262 То же, что и параметр “<literal>route</literal>” сервера группы |
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263 <link doc="ngx_http_upstream_module.xml" id="route">http</link>. |
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264 </tag-desc> |
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265 |
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266 </list> |
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267 |
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268 Первые три параметра выбирают объект. |
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269 Объектом может быть либо группа серверов http или stream, |
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270 либо отдельный сервер. |
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271 Если остальные параметры не указаны, то показывается конфигурация выбранной |
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272 группы или сервера. |
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273 </para> |
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274 |
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275 <para> |
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276 Например, команда для просмотра конфигурации всей группы |
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277 выглядит следующим образом: |
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278 <example> |
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279 http://127.0.0.1/upstream_conf?upstream=backend |
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280 </example> |
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281 |
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282 Для просмотра конфигурации отдельного сервера следует указать его идентификатор: |
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283 <example> |
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284 http://127.0.0.1/upstream_conf?upstream=backend&id=42 |
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285 </example> |
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286 </para> |
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287 |
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288 <para> |
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289 Для добавления нового сервера в группу |
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290 следует указать его адрес в параметре “<literal>server=</literal>”. |
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291 Если остальные параметры не указаны, то при добавлении сервера |
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292 их значения будут установлены по умолчанию (см. директиву |
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293 “<literal>server</literal>” для |
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294 <link doc="ngx_http_upstream_module.xml" id="server">http</link> |
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295 или |
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296 <link doc="../stream/ngx_stream_upstream_module.xml" id="server">stream</link>). |
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297 </para> |
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298 |
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299 <para> |
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300 Например, команда для добавления нового основного сервера в группу |
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301 выглядит следующим образом: |
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302 <example> |
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303 http://127.0.0.1/upstream_conf?add=&upstream=backend&server=127.0.0.1:8080 |
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304 </example> |
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305 |
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306 Добавление нового запасного сервера происходит следующим образом: |
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307 <example> |
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308 http://127.0.0.1/upstream_conf?add=&upstream=backend&backup=&server=127.0.0.1:8080 |
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309 </example> |
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310 |
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311 Добавление нового основного сервера с нестандартными |
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312 значениями параметров и с пометкой его как постоянно недоступного |
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313 (“<literal>down</literal>”) происходит следующим образом: |
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314 <example> |
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315 http://127.0.0.1/upstream_conf?add=&upstream=backend&server=127.0.0.1:8080&weight=2&down= |
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316 </example> |
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317 |
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318 Для удаления сервера следует указать его идентификатор: |
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319 <example> |
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320 http://127.0.0.1/upstream_conf?remove=&upstream=backend&id=42 |
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321 </example> |
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322 |
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323 Пометка существующего сервера как постоянно недоступного |
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324 (“<literal>down</literal>”) происходит следующим образом: |
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325 <example> |
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326 http://127.0.0.1/upstream_conf?upstream=backend&id=42&down= |
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327 </example> |
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328 |
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329 Изменение адреса существующего сервера происходит следующим образом: |
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330 <example> |
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331 http://127.0.0.1/upstream_conf?upstream=backend&id=42&server=192.0.2.3:8123 |
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332 </example> |
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333 |
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334 Изменение других параметров существующего сервера происходит следующим образом: |
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335 <example> |
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336 http://127.0.0.1/upstream_conf?upstream=backend&id=42&max_fails=3&weight=4 |
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337 </example> |
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338 |
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339 Вышеприведённые примеры актуальны для группы серверов |
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340 <link doc="ngx_http_upstream_module.xml">http</link>. |
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341 Аналогичные примеры для группы серверов |
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342 <link doc="../stream/ngx_stream_upstream_module.xml">stream</link> |
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343 требуют указания параметра “<literal>stream=</literal>”. |
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344 </para> |
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345 |
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346 </directive> |
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347 |
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348 </section> |
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349 |
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350 </module> |