Mercurial > hg > ngx_http_upstream_keepalive
annotate ngx_http_upstream_keepalive_module.c @ 27:f3b50effc1d4
Keepalive: add proxy tests.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Tue, 26 Jul 2011 12:52:34 +0400 |
parents | cb15f6f4d820 |
children | baf671881a8d |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Maxim Dounin |
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4 */ |
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5 |
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6 |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 #include <ngx_http.h> |
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12 typedef struct { |
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13 ngx_uint_t max_cached; |
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14 ngx_uint_t single; /* unsigned:1 */ |
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15 |
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16 ngx_queue_t cache; |
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17 ngx_queue_t free; |
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18 |
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19 ngx_http_upstream_init_pt original_init_upstream; |
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20 ngx_http_upstream_init_peer_pt original_init_peer; |
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21 |
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22 } ngx_http_upstream_keepalive_srv_conf_t; |
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25 typedef struct { |
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26 ngx_http_upstream_keepalive_srv_conf_t *conf; |
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28 ngx_http_upstream_t *upstream; |
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30 void *data; |
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31 |
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32 ngx_event_get_peer_pt original_get_peer; |
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33 ngx_event_free_peer_pt original_free_peer; |
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34 |
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35 ngx_uint_t failed; /* unsigned:1 */ |
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37 } ngx_http_upstream_keepalive_peer_data_t; |
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38 |
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39 |
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40 typedef struct { |
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41 ngx_http_upstream_keepalive_srv_conf_t *conf; |
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42 |
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43 ngx_queue_t queue; |
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44 ngx_connection_t *connection; |
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45 |
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46 socklen_t socklen; |
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47 struct sockaddr_storage sockaddr; |
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48 |
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49 } ngx_http_upstream_keepalive_cache_t; |
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51 |
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52 static ngx_int_t ngx_http_upstream_init_keepalive_peer(ngx_http_request_t *r, |
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53 ngx_http_upstream_srv_conf_t *us); |
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54 static ngx_int_t ngx_http_upstream_get_keepalive_peer(ngx_peer_connection_t *pc, |
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55 void *data); |
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56 static void ngx_http_upstream_free_keepalive_peer(ngx_peer_connection_t *pc, |
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57 void *data, ngx_uint_t state); |
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58 |
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59 static void ngx_http_upstream_keepalive_dummy_handler(ngx_event_t *ev); |
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60 static void ngx_http_upstream_keepalive_close_handler(ngx_event_t *ev); |
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61 |
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62 static void *ngx_http_upstream_keepalive_create_conf(ngx_conf_t *cf); |
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63 static char *ngx_http_upstream_keepalive(ngx_conf_t *cf, ngx_command_t *cmd, |
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64 void *conf); |
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65 |
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66 |
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67 static ngx_command_t ngx_http_upstream_keepalive_commands[] = { |
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68 |
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69 { ngx_string("keepalive"), |
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70 NGX_HTTP_UPS_CONF|NGX_CONF_TAKE12, |
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71 ngx_http_upstream_keepalive, |
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72 0, |
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73 0, |
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74 NULL }, |
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75 |
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76 ngx_null_command |
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77 }; |
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78 |
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79 |
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80 static ngx_http_module_t ngx_http_upstream_keepalive_module_ctx = { |
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81 NULL, /* preconfiguration */ |
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82 NULL, /* postconfiguration */ |
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83 |
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84 NULL, /* create main configuration */ |
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85 NULL, /* init main configuration */ |
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86 |
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87 ngx_http_upstream_keepalive_create_conf, /* create server configuration */ |
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88 NULL, /* merge server configuration */ |
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89 |
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90 NULL, /* create location configuration */ |
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91 NULL /* merge location configuration */ |
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92 }; |
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94 |
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95 ngx_module_t ngx_http_upstream_keepalive_module = { |
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96 NGX_MODULE_V1, |
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97 &ngx_http_upstream_keepalive_module_ctx, /* module context */ |
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98 ngx_http_upstream_keepalive_commands, /* module directives */ |
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99 NGX_HTTP_MODULE, /* module type */ |
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100 NULL, /* init master */ |
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101 NULL, /* init module */ |
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102 NULL, /* init process */ |
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103 NULL, /* init thread */ |
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104 NULL, /* exit thread */ |
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105 NULL, /* exit process */ |
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106 NULL, /* exit master */ |
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107 NGX_MODULE_V1_PADDING |
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108 }; |
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109 |
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110 |
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111 ngx_int_t |
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112 ngx_http_upstream_init_keepalive(ngx_conf_t *cf, |
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113 ngx_http_upstream_srv_conf_t *us) |
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114 { |
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115 ngx_uint_t i; |
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116 ngx_http_upstream_keepalive_srv_conf_t *kcf; |
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117 ngx_http_upstream_keepalive_cache_t *cached; |
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118 |
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119 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, cf->log, 0, |
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120 "init keepalive"); |
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121 |
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122 kcf = ngx_http_conf_upstream_srv_conf(us, |
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123 ngx_http_upstream_keepalive_module); |
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124 |
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125 if (kcf->original_init_upstream(cf, us) != NGX_OK) { |
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126 return NGX_ERROR; |
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127 } |
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128 |
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129 kcf->original_init_peer = us->peer.init; |
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130 |
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131 us->peer.init = ngx_http_upstream_init_keepalive_peer; |
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132 |
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133 /* allocate cache items and add to free queue */ |
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134 |
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135 cached = ngx_pcalloc(cf->pool, |
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136 sizeof(ngx_http_upstream_keepalive_cache_t) * kcf->max_cached); |
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137 if (cached == NULL) { |
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138 return NGX_ERROR; |
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139 } |
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140 |
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141 ngx_queue_init(&kcf->cache); |
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142 ngx_queue_init(&kcf->free); |
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143 |
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144 for (i = 0; i < kcf->max_cached; i++) { |
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145 ngx_queue_insert_head(&kcf->free, &cached[i].queue); |
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146 cached[i].conf = kcf; |
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147 } |
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148 |
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149 return NGX_OK; |
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150 } |
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151 |
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152 |
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153 static ngx_int_t |
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154 ngx_http_upstream_init_keepalive_peer(ngx_http_request_t *r, |
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155 ngx_http_upstream_srv_conf_t *us) |
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156 { |
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157 ngx_http_upstream_keepalive_peer_data_t *kp; |
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158 ngx_http_upstream_keepalive_srv_conf_t *kcf; |
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159 |
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160 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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161 "init keepalive peer"); |
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162 |
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163 kcf = ngx_http_conf_upstream_srv_conf(us, |
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164 ngx_http_upstream_keepalive_module); |
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165 |
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166 kp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_keepalive_peer_data_t)); |
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167 if (kp == NULL) { |
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168 return NGX_ERROR; |
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169 } |
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170 |
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171 if (kcf->original_init_peer(r, us) != NGX_OK) { |
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172 return NGX_ERROR; |
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173 } |
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174 |
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175 kp->conf = kcf; |
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176 kp->upstream = r->upstream; |
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177 kp->data = r->upstream->peer.data; |
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178 kp->original_get_peer = r->upstream->peer.get; |
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179 kp->original_free_peer = r->upstream->peer.free; |
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180 |
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181 r->upstream->peer.data = kp; |
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182 r->upstream->peer.get = ngx_http_upstream_get_keepalive_peer; |
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183 r->upstream->peer.free = ngx_http_upstream_free_keepalive_peer; |
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184 |
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185 return NGX_OK; |
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186 } |
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187 |
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188 |
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189 static ngx_int_t |
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190 ngx_http_upstream_get_keepalive_peer(ngx_peer_connection_t *pc, void *data) |
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191 { |
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192 ngx_http_upstream_keepalive_peer_data_t *kp = data; |
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193 ngx_http_upstream_keepalive_cache_t *item; |
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194 |
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195 ngx_int_t rc; |
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196 ngx_queue_t *q, *cache; |
5 | 197 ngx_connection_t *c; |
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198 |
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199 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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200 "get keepalive peer"); |
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201 |
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202 kp->failed = 0; |
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203 |
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204 /* single pool of cached connections */ |
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205 |
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206 if (kp->conf->single && !ngx_queue_empty(&kp->conf->cache)) { |
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207 |
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208 q = ngx_queue_head(&kp->conf->cache); |
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209 ngx_queue_remove(q); |
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210 |
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211 item = ngx_queue_data(q, ngx_http_upstream_keepalive_cache_t, queue); |
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212 c = item->connection; |
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213 |
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214 ngx_queue_insert_head(&kp->conf->free, q); |
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215 |
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216 c->idle = 0; |
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217 c->log = pc->log; |
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218 c->read->log = pc->log; |
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219 c->write->log = pc->log; |
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220 |
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221 pc->connection = c; |
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222 pc->cached = 1; |
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223 |
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224 return NGX_DONE; |
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225 } |
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226 |
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227 rc = kp->original_get_peer(pc, kp->data); |
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228 |
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229 if (kp->conf->single || rc != NGX_OK) { |
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230 return rc; |
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231 } |
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232 |
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233 /* search cache for suitable connection */ |
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234 |
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235 cache = &kp->conf->cache; |
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236 |
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237 for (q = ngx_queue_head(cache); |
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238 q != ngx_queue_sentinel(cache); |
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239 q = ngx_queue_next(q)) |
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240 { |
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241 item = ngx_queue_data(q, ngx_http_upstream_keepalive_cache_t, queue); |
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242 c = item->connection; |
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243 |
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244 if (ngx_memn2cmp((u_char *) &item->sockaddr, (u_char *) pc->sockaddr, |
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245 item->socklen, pc->socklen) |
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246 == 0) |
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247 { |
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248 ngx_queue_remove(q); |
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249 ngx_queue_insert_head(&kp->conf->free, q); |
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250 |
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251 c->idle = 0; |
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252 c->log = pc->log; |
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253 c->read->log = pc->log; |
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254 c->write->log = pc->log; |
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255 |
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256 pc->connection = c; |
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257 pc->cached = 1; |
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258 |
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259 return NGX_DONE; |
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260 } |
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261 } |
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262 |
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263 return NGX_OK; |
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264 } |
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265 |
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266 |
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267 static void |
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268 ngx_http_upstream_free_keepalive_peer(ngx_peer_connection_t *pc, void *data, |
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269 ngx_uint_t state) |
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270 { |
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271 ngx_http_upstream_keepalive_peer_data_t *kp = data; |
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272 ngx_http_upstream_keepalive_cache_t *item; |
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273 |
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274 ngx_uint_t status; |
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275 ngx_queue_t *q; |
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276 ngx_connection_t *c; |
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277 ngx_http_upstream_t *u; |
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278 |
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279 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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280 "free keepalive peer"); |
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281 |
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282 /* remember failed state - peer.free() may be called more than once */ |
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283 |
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284 if (state & NGX_PEER_FAILED) { |
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285 kp->failed = 1; |
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286 } |
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287 |
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288 /* |
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289 * cache valid connections |
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290 * |
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291 * For memcached this means status either 404 or 200. For status 200 we |
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292 * should also check if all response body was read (u->length == 0) and |
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293 * make sure that u->length is valid (we use u->header_sent flag to test |
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294 * this). Memcached is the only supported protocol for now. |
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295 * |
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296 * Some notes on other possibilities (incomplete): |
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297 * |
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298 * fastcgi: u->pipe->upstream_done should be sufficient |
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299 * |
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300 * proxy buffered: u->pipe->upstream_done, 304 replies, replies to head |
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301 * requests (see RFC 2616, 4.4 Message Length) |
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302 * |
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303 * proxy unbuffered: 200 as for memcached (with u->length == 0 and |
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304 * header_sent), 304, replies to head requests |
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305 * |
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306 * subrequest_in_memory: won't work as of now |
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307 * |
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308 * TODO: move this logic to protocol modules (NGX_PEER_KEEPALIVE?) |
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309 */ |
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310 |
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311 u = kp->upstream; |
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312 c = pc->connection; |
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313 status = u->headers_in.status_n; |
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314 |
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315 if (!kp->failed |
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316 && c != NULL |
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317 && !c->read->timedout |
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318 && !c->write->timedout |
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319 #if (NGX_UPSTREAM_KEEPALIVE_PATCHED) |
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320 && u->keepalive) |
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321 #else |
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322 && (status == NGX_HTTP_NOT_FOUND |
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323 || (status == NGX_HTTP_OK && u->header_sent && u->length == 0))) |
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324 #endif |
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325 { |
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326 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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327 "free keepalive peer: saving connection %p", c); |
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328 |
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329 if (ngx_queue_empty(&kp->conf->free)) { |
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330 |
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331 q = ngx_queue_last(&kp->conf->cache); |
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332 ngx_queue_remove(q); |
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333 |
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334 item = ngx_queue_data(q, ngx_http_upstream_keepalive_cache_t, |
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335 queue); |
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336 |
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337 ngx_close_connection(item->connection); |
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338 |
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339 } else { |
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340 q = ngx_queue_head(&kp->conf->free); |
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341 ngx_queue_remove(q); |
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342 |
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343 item = ngx_queue_data(q, ngx_http_upstream_keepalive_cache_t, |
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344 queue); |
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345 } |
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346 |
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347 item->connection = c; |
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348 ngx_queue_insert_head(&kp->conf->cache, q); |
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349 |
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350 pc->connection = NULL; |
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351 |
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352 if (c->read->timer_set) { |
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353 ngx_del_timer(c->read); |
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354 } |
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355 if (c->write->timer_set) { |
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356 ngx_del_timer(c->write); |
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357 } |
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358 |
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359 c->write->handler = ngx_http_upstream_keepalive_dummy_handler; |
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360 c->read->handler = ngx_http_upstream_keepalive_close_handler; |
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361 |
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362 c->data = item; |
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363 c->idle = 1; |
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364 c->log = ngx_cycle->log; |
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Keepalive: common cache for all backends.
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0
diff
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|
365 c->read->log = ngx_cycle->log; |
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Keepalive: common cache for all backends.
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|
366 c->write->log = ngx_cycle->log; |
6
bef88ba0b378
Keepalive: distinguish between upstream servers by default.
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5
diff
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|
367 |
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Keepalive: distinguish between upstream servers by default.
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diff
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|
368 item->socklen = pc->socklen; |
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Keepalive: distinguish between upstream servers by default.
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|
369 ngx_memcpy(&item->sockaddr, pc->sockaddr, pc->socklen); |
1
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Keepalive: common cache for all backends.
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|
370 } |
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Keepalive: common cache for all backends.
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0
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|
371 |
0
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Keepalive upstream balancer: transparent skeleton.
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|
372 return kp->original_free_peer(pc, kp->data, state); |
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Keepalive upstream balancer: transparent skeleton.
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|
373 } |
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Keepalive upstream balancer: transparent skeleton.
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|
374 |
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Keepalive upstream balancer: transparent skeleton.
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|
375 |
1
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|
376 static void |
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Keepalive: common cache for all backends.
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|
377 ngx_http_upstream_keepalive_dummy_handler(ngx_event_t *ev) |
ca955a7f651b
Keepalive: common cache for all backends.
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|
378 { |
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Keepalive: common cache for all backends.
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|
379 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ev->log, 0, |
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Keepalive: common cache for all backends.
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|
380 "keepalive dummy handler"); |
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Keepalive: common cache for all backends.
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|
381 } |
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Keepalive: common cache for all backends.
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|
382 |
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Keepalive: common cache for all backends.
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|
383 |
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Keepalive: common cache for all backends.
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diff
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|
384 static void |
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Keepalive: common cache for all backends.
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0
diff
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|
385 ngx_http_upstream_keepalive_close_handler(ngx_event_t *ev) |
ca955a7f651b
Keepalive: common cache for all backends.
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0
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|
386 { |
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Keepalive: common cache for all backends.
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diff
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|
387 ngx_http_upstream_keepalive_srv_conf_t *conf; |
2
8545bbda9e4b
Keepalive: reimplement using queues.
Maxim Dounin <mdounin@mdounin.ru>
parents:
1
diff
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|
388 ngx_http_upstream_keepalive_cache_t *item; |
1
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Keepalive: common cache for all backends.
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|
389 |
21
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
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18
diff
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|
390 int n; |
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Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
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18
diff
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|
391 char buf[1]; |
1
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Keepalive: common cache for all backends.
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|
392 ngx_connection_t *c; |
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Keepalive: common cache for all backends.
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|
393 |
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|
394 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ev->log, 0, |
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Keepalive: common cache for all backends.
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0
diff
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|
395 "keepalive close handler"); |
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Keepalive: common cache for all backends.
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0
diff
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|
396 |
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diff
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|
397 c = ev->data; |
21
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Keepalive: avoid closing upstream connection on stale events.
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18
diff
changeset
|
398 |
24
2ee28064a04a
Keepalive: correctly close connections on gracefull shutdown.
Maxim Dounin <mdounin@mdounin.ru>
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|
399 if (c->close) { |
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Keepalive: correctly close connections on gracefull shutdown.
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|
400 goto close; |
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Keepalive: correctly close connections on gracefull shutdown.
Maxim Dounin <mdounin@mdounin.ru>
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21
diff
changeset
|
401 } |
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Keepalive: correctly close connections on gracefull shutdown.
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21
diff
changeset
|
402 |
21
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
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18
diff
changeset
|
403 n = recv(c->fd, buf, 1, MSG_PEEK); |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
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18
diff
changeset
|
404 |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
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18
diff
changeset
|
405 if (n == -1 && ngx_socket_errno == NGX_EAGAIN) { |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
parents:
18
diff
changeset
|
406 /* stale event */ |
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Keepalive: avoid closing upstream connection on stale events.
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18
diff
changeset
|
407 |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
parents:
18
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|
408 if (ngx_handle_read_event(c->read, 0) != NGX_OK) { |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
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18
diff
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|
409 goto close; |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
parents:
18
diff
changeset
|
410 } |
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Keepalive: avoid closing upstream connection on stale events.
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18
diff
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|
411 |
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Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
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18
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|
412 return; |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
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18
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|
413 } |
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Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
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18
diff
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|
414 |
9a4ee6fe1c6d
Keepalive: avoid closing upstream connection on stale events.
Maxim Dounin <mdounin@mdounin.ru>
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18
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changeset
|
415 close: |
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Keepalive: avoid closing upstream connection on stale events.
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18
diff
changeset
|
416 |
8
565939797f5c
Keepalive: fix connection closing and avoid for loop there.
Maxim Dounin <mdounin@mdounin.ru>
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6
diff
changeset
|
417 item = c->data; |
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Keepalive: fix connection closing and avoid for loop there.
Maxim Dounin <mdounin@mdounin.ru>
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6
diff
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|
418 conf = item->conf; |
1
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|
419 |
8
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|
420 ngx_queue_remove(&item->queue); |
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Keepalive: fix connection closing and avoid for loop there.
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|
421 ngx_close_connection(item->connection); |
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Keepalive: fix connection closing and avoid for loop there.
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|
422 ngx_queue_insert_head(&conf->free, &item->queue); |
1
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Keepalive: common cache for all backends.
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0
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|
423 } |
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Keepalive: common cache for all backends.
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parents:
0
diff
changeset
|
424 |
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Keepalive: common cache for all backends.
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0
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changeset
|
425 |
0
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
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diff
changeset
|
426 static void * |
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Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
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diff
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|
427 ngx_http_upstream_keepalive_create_conf(ngx_conf_t *cf) |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
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|
428 { |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
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diff
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|
429 ngx_http_upstream_keepalive_srv_conf_t *conf; |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
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diff
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|
430 |
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Keepalive upstream balancer: transparent skeleton.
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diff
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|
431 conf = ngx_pcalloc(cf->pool, |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
432 sizeof(ngx_http_upstream_keepalive_srv_conf_t)); |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
433 if (conf == NULL) { |
18
2054159546d0
Keepalive: fix create_conf to return NULL on errors.
Maxim Dounin <mdounin@mdounin.ru>
parents:
14
diff
changeset
|
434 return NULL; |
0
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
435 } |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
436 |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
437 /* |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
438 * set by ngx_pcalloc(): |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
439 * |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
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diff
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|
440 * conf->original_init_upstream = NULL; |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
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diff
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|
441 * conf->original_init_peer = NULL; |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
442 */ |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
443 |
1
ca955a7f651b
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0
diff
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|
444 conf->max_cached = 1; |
ca955a7f651b
Keepalive: common cache for all backends.
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0
diff
changeset
|
445 |
0
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
446 return conf; |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
447 } |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
448 |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
449 |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
450 static char * |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
451 ngx_http_upstream_keepalive(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
452 { |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
453 ngx_http_upstream_srv_conf_t *uscf; |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
454 ngx_http_upstream_keepalive_srv_conf_t *kcf; |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
455 |
1
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
456 ngx_int_t n; |
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
457 ngx_str_t *value; |
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
458 ngx_uint_t i; |
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
459 |
0
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
460 uscf = ngx_http_conf_get_module_srv_conf(cf, ngx_http_upstream_module); |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
461 |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
462 kcf = ngx_http_conf_upstream_srv_conf(uscf, |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
463 ngx_http_upstream_keepalive_module); |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
464 |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
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diff
changeset
|
465 kcf->original_init_upstream = uscf->peer.init_upstream |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
466 ? uscf->peer.init_upstream |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
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|
467 : ngx_http_upstream_init_round_robin; |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
468 |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
469 uscf->peer.init_upstream = ngx_http_upstream_init_keepalive; |
725ee11164f3
Keepalive upstream balancer: transparent skeleton.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
470 |
1
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
471 /* read options */ |
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
472 |
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
473 value = cf->args->elts; |
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
474 |
6
bef88ba0b378
Keepalive: distinguish between upstream servers by default.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5
diff
changeset
|
475 n = ngx_atoi(value[1].data, value[1].len); |
1
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
476 |
6
bef88ba0b378
Keepalive: distinguish between upstream servers by default.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5
diff
changeset
|
477 if (n == NGX_ERROR || n == 0) { |
bef88ba0b378
Keepalive: distinguish between upstream servers by default.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5
diff
changeset
|
478 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
bef88ba0b378
Keepalive: distinguish between upstream servers by default.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5
diff
changeset
|
479 "invalid value \"%V\" in \"%V\" directive", |
bef88ba0b378
Keepalive: distinguish between upstream servers by default.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5
diff
changeset
|
480 &value[1], &cmd->name); |
bef88ba0b378
Keepalive: distinguish between upstream servers by default.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5
diff
changeset
|
481 return NGX_CONF_ERROR; |
bef88ba0b378
Keepalive: distinguish between upstream servers by default.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5
diff
changeset
|
482 } |
1
ca955a7f651b
Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
0
diff
changeset
|
483 |
6
bef88ba0b378
Keepalive: distinguish between upstream servers by default.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5
diff
changeset
|
484 kcf->max_cached = n; |
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Keepalive: distinguish between upstream servers by default.
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485 |
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Keepalive: distinguish between upstream servers by default.
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486 for (i = 2; i < cf->args->nelts; i++) { |
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Keepalive: distinguish between upstream servers by default.
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487 |
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Keepalive: distinguish between upstream servers by default.
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488 if (ngx_strcmp(value[i].data, "single") == 0) { |
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Keepalive: distinguish between upstream servers by default.
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489 |
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Keepalive: distinguish between upstream servers by default.
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490 kcf->single = 1; |
1
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Keepalive: common cache for all backends.
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491 |
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Keepalive: common cache for all backends.
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492 continue; |
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Keepalive: common cache for all backends.
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493 } |
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Keepalive: common cache for all backends.
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494 |
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Keepalive: common cache for all backends.
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495 goto invalid; |
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Keepalive: common cache for all backends.
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496 } |
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Keepalive: common cache for all backends.
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parents:
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497 |
0
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Keepalive upstream balancer: transparent skeleton.
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498 return NGX_CONF_OK; |
1
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Keepalive: common cache for all backends.
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parents:
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499 |
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Keepalive: common cache for all backends.
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500 invalid: |
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Keepalive: common cache for all backends.
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parents:
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diff
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501 |
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Keepalive: common cache for all backends.
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502 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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Keepalive: common cache for all backends.
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503 "invalid parameter \"%V\"", &value[i]); |
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Keepalive: common cache for all backends.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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504 |
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Keepalive: common cache for all backends.
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parents:
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505 return NGX_CONF_ERROR; |
0
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Keepalive upstream balancer: transparent skeleton.
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parents:
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506 } |