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6115
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 * Copyright (C) Nginx, Inc.
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5 */
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6
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7
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10 #include <ngx_stream.h>
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11
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12
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13 static char *ngx_stream_upstream(ngx_conf_t *cf, ngx_command_t *cmd,
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14 void *dummy);
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15 static char *ngx_stream_upstream_server(ngx_conf_t *cf, ngx_command_t *cmd,
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16 void *conf);
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17 static void *ngx_stream_upstream_create_main_conf(ngx_conf_t *cf);
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18 static char *ngx_stream_upstream_init_main_conf(ngx_conf_t *cf, void *conf);
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19
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20
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21 static ngx_command_t ngx_stream_upstream_commands[] = {
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22
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23 { ngx_string("upstream"),
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24 NGX_STREAM_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE1,
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25 ngx_stream_upstream,
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26 0,
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27 0,
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28 NULL },
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29
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30 { ngx_string("server"),
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31 NGX_STREAM_UPS_CONF|NGX_CONF_1MORE,
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32 ngx_stream_upstream_server,
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33 NGX_STREAM_SRV_CONF_OFFSET,
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34 0,
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35 NULL },
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36
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37 ngx_null_command
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38 };
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39
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40
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41 static ngx_stream_module_t ngx_stream_upstream_module_ctx = {
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42 ngx_stream_upstream_create_main_conf, /* create main configuration */
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43 ngx_stream_upstream_init_main_conf, /* init main configuration */
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44
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45 NULL, /* create server configuration */
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46 NULL, /* merge server configuration */
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47 };
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48
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49
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50 ngx_module_t ngx_stream_upstream_module = {
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51 NGX_MODULE_V1,
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52 &ngx_stream_upstream_module_ctx, /* module context */
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53 ngx_stream_upstream_commands, /* module directives */
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54 NGX_STREAM_MODULE, /* module type */
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55 NULL, /* init master */
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56 NULL, /* init module */
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57 NULL, /* init process */
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58 NULL, /* init thread */
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59 NULL, /* exit thread */
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60 NULL, /* exit process */
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61 NULL, /* exit master */
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62 NGX_MODULE_V1_PADDING
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63 };
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64
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65
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66 static char *
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67 ngx_stream_upstream(ngx_conf_t *cf, ngx_command_t *cmd, void *dummy)
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68 {
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69 char *rv;
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70 void *mconf;
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71 ngx_str_t *value;
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72 ngx_url_t u;
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73 ngx_uint_t m;
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74 ngx_conf_t pcf;
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75 ngx_stream_module_t *module;
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76 ngx_stream_conf_ctx_t *ctx, *stream_ctx;
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77 ngx_stream_upstream_srv_conf_t *uscf;
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78
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79 ngx_memzero(&u, sizeof(ngx_url_t));
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80
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81 value = cf->args->elts;
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82 u.host = value[1];
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83 u.no_resolve = 1;
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84 u.no_port = 1;
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85
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86 uscf = ngx_stream_upstream_add(cf, &u, NGX_STREAM_UPSTREAM_CREATE
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87 |NGX_STREAM_UPSTREAM_WEIGHT
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88 |NGX_STREAM_UPSTREAM_MAX_FAILS
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89 |NGX_STREAM_UPSTREAM_FAIL_TIMEOUT
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90 |NGX_STREAM_UPSTREAM_DOWN
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91 |NGX_STREAM_UPSTREAM_BACKUP);
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92 if (uscf == NULL) {
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93 return NGX_CONF_ERROR;
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94 }
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95
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96
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97 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_stream_conf_ctx_t));
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98 if (ctx == NULL) {
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99 return NGX_CONF_ERROR;
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100 }
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101
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102 stream_ctx = cf->ctx;
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103 ctx->main_conf = stream_ctx->main_conf;
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104
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105 /* the upstream{}'s srv_conf */
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106
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107 ctx->srv_conf = ngx_pcalloc(cf->pool,
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108 sizeof(void *) * ngx_stream_max_module);
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109 if (ctx->srv_conf == NULL) {
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110 return NGX_CONF_ERROR;
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111 }
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112
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113 ctx->srv_conf[ngx_stream_upstream_module.ctx_index] = uscf;
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114
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115 uscf->srv_conf = ctx->srv_conf;
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116
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117 for (m = 0; ngx_modules[m]; m++) {
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118 if (ngx_modules[m]->type != NGX_STREAM_MODULE) {
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119 continue;
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120 }
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121
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122 module = ngx_modules[m]->ctx;
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123
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124 if (module->create_srv_conf) {
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125 mconf = module->create_srv_conf(cf);
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126 if (mconf == NULL) {
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127 return NGX_CONF_ERROR;
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128 }
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129
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130 ctx->srv_conf[ngx_modules[m]->ctx_index] = mconf;
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131 }
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132 }
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133
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134 uscf->servers = ngx_array_create(cf->pool, 4,
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135 sizeof(ngx_stream_upstream_server_t));
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136 if (uscf->servers == NULL) {
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137 return NGX_CONF_ERROR;
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138 }
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139
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140
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141 /* parse inside upstream{} */
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142
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143 pcf = *cf;
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144 cf->ctx = ctx;
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145 cf->cmd_type = NGX_STREAM_UPS_CONF;
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146
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147 rv = ngx_conf_parse(cf, NULL);
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148
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149 *cf = pcf;
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150
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151 if (rv != NGX_CONF_OK) {
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152 return rv;
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153 }
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154
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155 if (uscf->servers->nelts == 0) {
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156 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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157 "no servers are inside upstream");
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158 return NGX_CONF_ERROR;
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159 }
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160
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161 return rv;
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162 }
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163
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164
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165 static char *
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166 ngx_stream_upstream_server(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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167 {
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168 ngx_stream_upstream_srv_conf_t *uscf = conf;
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169
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170 time_t fail_timeout;
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171 ngx_str_t *value, s;
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172 ngx_url_t u;
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173 ngx_int_t weight, max_fails;
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174 ngx_uint_t i;
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175 ngx_stream_upstream_server_t *us;
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176
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177 us = ngx_array_push(uscf->servers);
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178 if (us == NULL) {
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179 return NGX_CONF_ERROR;
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180 }
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181
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182 ngx_memzero(us, sizeof(ngx_stream_upstream_server_t));
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183
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184 value = cf->args->elts;
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185
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186 weight = 1;
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187 max_fails = 1;
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188 fail_timeout = 10;
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189
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190 for (i = 2; i < cf->args->nelts; i++) {
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191
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192 if (ngx_strncmp(value[i].data, "weight=", 7) == 0) {
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193
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194 if (!(uscf->flags & NGX_STREAM_UPSTREAM_WEIGHT)) {
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195 goto not_supported;
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196 }
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197
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198 weight = ngx_atoi(&value[i].data[7], value[i].len - 7);
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199
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200 if (weight == NGX_ERROR || weight == 0) {
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201 goto invalid;
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202 }
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203
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204 continue;
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205 }
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206
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207 if (ngx_strncmp(value[i].data, "max_fails=", 10) == 0) {
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208
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209 if (!(uscf->flags & NGX_STREAM_UPSTREAM_MAX_FAILS)) {
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210 goto not_supported;
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211 }
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212
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213 max_fails = ngx_atoi(&value[i].data[10], value[i].len - 10);
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214
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215 if (max_fails == NGX_ERROR) {
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216 goto invalid;
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217 }
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218
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219 continue;
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220 }
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221
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222 if (ngx_strncmp(value[i].data, "fail_timeout=", 13) == 0) {
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223
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224 if (!(uscf->flags & NGX_STREAM_UPSTREAM_FAIL_TIMEOUT)) {
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225 goto not_supported;
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226 }
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227
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228 s.len = value[i].len - 13;
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229 s.data = &value[i].data[13];
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230
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231 fail_timeout = ngx_parse_time(&s, 1);
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232
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233 if (fail_timeout == (time_t) NGX_ERROR) {
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234 goto invalid;
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235 }
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236
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237 continue;
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238 }
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239
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240 if (ngx_strcmp(value[i].data, "backup") == 0) {
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241
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242 if (!(uscf->flags & NGX_STREAM_UPSTREAM_BACKUP)) {
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243 goto not_supported;
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244 }
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245
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246 us->backup = 1;
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247
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248 continue;
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249 }
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250
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251 if (ngx_strcmp(value[i].data, "down") == 0) {
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252
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253 if (!(uscf->flags & NGX_STREAM_UPSTREAM_DOWN)) {
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254 goto not_supported;
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255 }
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256
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257 us->down = 1;
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258
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259 continue;
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260 }
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261
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262 goto invalid;
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263 }
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264
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265 ngx_memzero(&u, sizeof(ngx_url_t));
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266
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267 u.url = value[1];
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268
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269 if (ngx_parse_url(cf->pool, &u) != NGX_OK) {
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270 if (u.err) {
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271 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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272 "%s in upstream \"%V\"", u.err, &u.url);
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273 }
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274
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275 return NGX_CONF_ERROR;
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276 }
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277
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278 if (u.no_port) {
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279 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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280 "no port in upstream \"%V\"", &u.url);
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281 return NGX_CONF_ERROR;
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282 }
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283
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284 us->name = u.url;
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285 us->addrs = u.addrs;
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286 us->naddrs = u.naddrs;
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287 us->weight = weight;
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288 us->max_fails = max_fails;
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289 us->fail_timeout = fail_timeout;
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290
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291 return NGX_CONF_OK;
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292
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293 invalid:
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294
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295 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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296 "invalid parameter \"%V\"", &value[i]);
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297
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298 return NGX_CONF_ERROR;
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299
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300 not_supported:
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301
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302 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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303 "balancing method does not support parameter \"%V\"",
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304 &value[i]);
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305
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306 return NGX_CONF_ERROR;
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307 }
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308
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309
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310 ngx_stream_upstream_srv_conf_t *
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311 ngx_stream_upstream_add(ngx_conf_t *cf, ngx_url_t *u, ngx_uint_t flags)
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312 {
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313 ngx_uint_t i;
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314 ngx_stream_upstream_server_t *us;
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315 ngx_stream_upstream_srv_conf_t *uscf, **uscfp;
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316 ngx_stream_upstream_main_conf_t *umcf;
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317
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318 if (!(flags & NGX_STREAM_UPSTREAM_CREATE)) {
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319
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320 if (ngx_parse_url(cf->pool, u) != NGX_OK) {
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321 if (u->err) {
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322 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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323 "%s in upstream \"%V\"", u->err, &u->url);
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324 }
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325
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326 return NULL;
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327 }
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328 }
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329
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330 umcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_upstream_module);
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331
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332 uscfp = umcf->upstreams.elts;
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333
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334 for (i = 0; i < umcf->upstreams.nelts; i++) {
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335
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336 if (uscfp[i]->host.len != u->host.len
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337 || ngx_strncasecmp(uscfp[i]->host.data, u->host.data, u->host.len)
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338 != 0)
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339 {
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340 continue;
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341 }
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342
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343 if ((flags & NGX_STREAM_UPSTREAM_CREATE)
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344 && (uscfp[i]->flags & NGX_STREAM_UPSTREAM_CREATE))
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345 {
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346 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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347 "duplicate upstream \"%V\"", &u->host);
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348 return NULL;
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349 }
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350
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351 if ((uscfp[i]->flags & NGX_STREAM_UPSTREAM_CREATE) && !u->no_port) {
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352 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
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353 "upstream \"%V\" may not have port %d",
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354 &u->host, u->port);
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355 return NULL;
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356 }
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357
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358 if ((flags & NGX_STREAM_UPSTREAM_CREATE) && !uscfp[i]->no_port) {
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359 ngx_log_error(NGX_LOG_WARN, cf->log, 0,
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360 "upstream \"%V\" may not have port %d in %s:%ui",
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361 &u->host, uscfp[i]->port,
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362 uscfp[i]->file_name, uscfp[i]->line);
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363 return NULL;
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364 }
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365
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366 if (uscfp[i]->port != u->port) {
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367 continue;
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368 }
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369
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370 if (flags & NGX_STREAM_UPSTREAM_CREATE) {
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371 uscfp[i]->flags = flags;
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372 }
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373
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374 return uscfp[i];
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375 }
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376
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377 uscf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_srv_conf_t));
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378 if (uscf == NULL) {
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379 return NULL;
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380 }
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381
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382 uscf->flags = flags;
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383 uscf->host = u->host;
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384 uscf->file_name = cf->conf_file->file.name.data;
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385 uscf->line = cf->conf_file->line;
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386 uscf->port = u->port;
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387 uscf->no_port = u->no_port;
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388
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389 if (u->naddrs == 1) {
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390 uscf->servers = ngx_array_create(cf->pool, 1,
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391 sizeof(ngx_stream_upstream_server_t));
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392 if (uscf->servers == NULL) {
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393 return NULL;
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394 }
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395
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396 us = ngx_array_push(uscf->servers);
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397 if (us == NULL) {
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398 return NULL;
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399 }
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400
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401 ngx_memzero(us, sizeof(ngx_stream_upstream_server_t));
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402
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403 us->addrs = u->addrs;
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404 us->naddrs = 1;
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405 }
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406
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407 uscfp = ngx_array_push(&umcf->upstreams);
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408 if (uscfp == NULL) {
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409 return NULL;
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410 }
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411
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412 *uscfp = uscf;
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413
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414 return uscf;
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415 }
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416
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417
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418 static void *
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419 ngx_stream_upstream_create_main_conf(ngx_conf_t *cf)
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420 {
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421 ngx_stream_upstream_main_conf_t *umcf;
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422
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423 umcf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_main_conf_t));
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424 if (umcf == NULL) {
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425 return NULL;
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426 }
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427
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428 if (ngx_array_init(&umcf->upstreams, cf->pool, 4,
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429 sizeof(ngx_stream_upstream_srv_conf_t *))
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430 != NGX_OK)
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431 {
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432 return NULL;
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433 }
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434
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435 return umcf;
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436 }
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437
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438
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439 static char *
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440 ngx_stream_upstream_init_main_conf(ngx_conf_t *cf, void *conf)
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|
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441 {
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442 ngx_stream_upstream_main_conf_t *umcf = conf;
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443
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444 ngx_uint_t i;
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445 ngx_stream_upstream_init_pt init;
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446 ngx_stream_upstream_srv_conf_t **uscfp;
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447
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|
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448 uscfp = umcf->upstreams.elts;
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449
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450 for (i = 0; i < umcf->upstreams.nelts; i++) {
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451
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452 init = uscfp[i]->peer.init_upstream
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453 ? uscfp[i]->peer.init_upstream
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454 : ngx_stream_upstream_init_round_robin;
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455
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456 if (init(cf, uscfp[i]) != NGX_OK) {
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457 return NGX_CONF_ERROR;
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458 }
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459 }
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460
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461 return NGX_CONF_OK;
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|
|
462 }
|
