Mercurial > hg > nginx
annotate src/http/ngx_http_upstream_round_robin.c @ 6102:3264b7828f72
Upstreams: locking.
| author | Ruslan Ermilov <ru@nginx.com> |
|---|---|
| date | Tue, 14 Apr 2015 19:01:23 +0300 |
| parents | c44459611d91 |
| children | 79ddb0bdb273 |
| rev | line source |
|---|---|
| 884 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4412 | 4 * Copyright (C) Nginx, Inc. |
| 884 | 5 */ |
| 6 | |
| 7 | |
| 8 #include <ngx_config.h> | |
| 9 #include <ngx_core.h> | |
| 10 #include <ngx_http.h> | |
| 11 | |
| 12 | |
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13 #define ngx_http_upstream_tries(p) ((p)->number \ |
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14 + ((p)->next ? (p)->next->number : 0)) |
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15 |
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16 |
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17 static ngx_http_upstream_rr_peer_t *ngx_http_upstream_get_peer( |
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18 ngx_http_upstream_rr_peer_data_t *rrp); |
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19 |
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20 #if (NGX_HTTP_SSL) |
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21 |
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22 static ngx_int_t ngx_http_upstream_empty_set_session(ngx_peer_connection_t *pc, |
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23 void *data); |
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24 static void ngx_http_upstream_empty_save_session(ngx_peer_connection_t *pc, |
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25 void *data); |
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26 |
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27 #endif |
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28 |
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29 |
| 884 | 30 ngx_int_t |
| 31 ngx_http_upstream_init_round_robin(ngx_conf_t *cf, | |
| 32 ngx_http_upstream_srv_conf_t *us) | |
| 33 { | |
| 34 ngx_url_t u; | |
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35 ngx_uint_t i, j, n, w; |
| 884 | 36 ngx_http_upstream_server_t *server; |
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37 ngx_http_upstream_rr_peer_t *peer, **peerp; |
| 1378 | 38 ngx_http_upstream_rr_peers_t *peers, *backup; |
| 884 | 39 |
| 40 us->peer.init = ngx_http_upstream_init_round_robin_peer; | |
| 41 | |
| 42 if (us->servers) { | |
| 43 server = us->servers->elts; | |
| 44 | |
| 1378 | 45 n = 0; |
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46 w = 0; |
| 1378 | 47 |
| 884 | 48 for (i = 0; i < us->servers->nelts; i++) { |
| 1378 | 49 if (server[i].backup) { |
| 50 continue; | |
| 51 } | |
| 52 | |
| 884 | 53 n += server[i].naddrs; |
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54 w += server[i].naddrs * server[i].weight; |
| 884 | 55 } |
| 56 | |
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57 if (n == 0) { |
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58 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, |
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59 "no servers in upstream \"%V\" in %s:%ui", |
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60 &us->host, us->file_name, us->line); |
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61 return NGX_ERROR; |
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62 } |
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63 |
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64 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t)); |
| 884 | 65 if (peers == NULL) { |
| 66 return NGX_ERROR; | |
| 67 } | |
| 68 | |
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69 peer = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peer_t) * n); |
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70 if (peer == NULL) { |
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71 return NGX_ERROR; |
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72 } |
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73 |
| 1378 | 74 peers->single = (n == 1); |
| 884 | 75 peers->number = n; |
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76 peers->weighted = (w != n); |
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77 peers->total_weight = w; |
| 884 | 78 peers->name = &us->host; |
| 79 | |
| 80 n = 0; | |
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81 peerp = &peers->peer; |
| 884 | 82 |
| 83 for (i = 0; i < us->servers->nelts; i++) { | |
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84 if (server[i].backup) { |
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85 continue; |
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86 } |
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87 |
| 884 | 88 for (j = 0; j < server[i].naddrs; j++) { |
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89 peer[n].sockaddr = server[i].addrs[j].sockaddr; |
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90 peer[n].socklen = server[i].addrs[j].socklen; |
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91 peer[n].name = server[i].addrs[j].name; |
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92 peer[n].weight = server[i].weight; |
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93 peer[n].effective_weight = server[i].weight; |
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94 peer[n].current_weight = 0; |
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95 peer[n].max_fails = server[i].max_fails; |
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96 peer[n].fail_timeout = server[i].fail_timeout; |
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97 peer[n].down = server[i].down; |
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98 peer[n].server = server[i].name; |
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99 |
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100 *peerp = &peer[n]; |
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101 peerp = &peer[n].next; |
| 884 | 102 n++; |
| 103 } | |
| 104 } | |
| 105 | |
| 106 us->peer.data = peers; | |
| 107 | |
| 1378 | 108 /* backup servers */ |
| 109 | |
| 110 n = 0; | |
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111 w = 0; |
| 1378 | 112 |
| 113 for (i = 0; i < us->servers->nelts; i++) { | |
| 114 if (!server[i].backup) { | |
| 115 continue; | |
| 116 } | |
| 117 | |
| 118 n += server[i].naddrs; | |
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119 w += server[i].naddrs * server[i].weight; |
| 1378 | 120 } |
| 121 | |
| 122 if (n == 0) { | |
| 123 return NGX_OK; | |
| 124 } | |
| 125 | |
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126 backup = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t)); |
| 1378 | 127 if (backup == NULL) { |
| 128 return NGX_ERROR; | |
| 129 } | |
| 130 | |
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131 peer = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peer_t) * n); |
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132 if (peer == NULL) { |
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133 return NGX_ERROR; |
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134 } |
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135 |
| 1378 | 136 peers->single = 0; |
| 137 backup->single = 0; | |
| 138 backup->number = n; | |
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139 backup->weighted = (w != n); |
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140 backup->total_weight = w; |
| 1378 | 141 backup->name = &us->host; |
| 142 | |
| 143 n = 0; | |
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144 peerp = &backup->peer; |
| 1378 | 145 |
| 146 for (i = 0; i < us->servers->nelts; i++) { | |
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147 if (!server[i].backup) { |
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148 continue; |
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149 } |
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150 |
| 1378 | 151 for (j = 0; j < server[i].naddrs; j++) { |
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152 peer[n].sockaddr = server[i].addrs[j].sockaddr; |
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153 peer[n].socklen = server[i].addrs[j].socklen; |
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154 peer[n].name = server[i].addrs[j].name; |
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155 peer[n].weight = server[i].weight; |
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156 peer[n].effective_weight = server[i].weight; |
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157 peer[n].current_weight = 0; |
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158 peer[n].max_fails = server[i].max_fails; |
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159 peer[n].fail_timeout = server[i].fail_timeout; |
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160 peer[n].down = server[i].down; |
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161 peer[n].server = server[i].name; |
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162 |
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163 *peerp = &peer[n]; |
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164 peerp = &peer[n].next; |
| 1378 | 165 n++; |
| 166 } | |
| 167 } | |
| 168 | |
| 169 peers->next = backup; | |
| 170 | |
| 884 | 171 return NGX_OK; |
| 172 } | |
| 173 | |
| 174 | |
| 175 /* an upstream implicitly defined by proxy_pass, etc. */ | |
| 176 | |
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177 if (us->port == 0) { |
| 906 | 178 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, |
| 179 "no port in upstream \"%V\" in %s:%ui", | |
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180 &us->host, us->file_name, us->line); |
| 906 | 181 return NGX_ERROR; |
| 182 } | |
| 183 | |
| 884 | 184 ngx_memzero(&u, sizeof(ngx_url_t)); |
| 185 | |
| 186 u.host = us->host; | |
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187 u.port = us->port; |
| 884 | 188 |
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189 if (ngx_inet_resolve_host(cf->pool, &u) != NGX_OK) { |
| 884 | 190 if (u.err) { |
| 191 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, | |
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192 "%s in upstream \"%V\" in %s:%ui", |
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193 u.err, &us->host, us->file_name, us->line); |
| 884 | 194 } |
| 195 | |
| 196 return NGX_ERROR; | |
| 197 } | |
| 198 | |
| 199 n = u.naddrs; | |
| 200 | |
|
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201 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t)); |
| 884 | 202 if (peers == NULL) { |
| 203 return NGX_ERROR; | |
| 204 } | |
| 205 | |
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206 peer = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peer_t) * n); |
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207 if (peer == NULL) { |
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208 return NGX_ERROR; |
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209 } |
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210 |
| 1378 | 211 peers->single = (n == 1); |
| 884 | 212 peers->number = n; |
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213 peers->weighted = 0; |
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214 peers->total_weight = n; |
| 884 | 215 peers->name = &us->host; |
| 216 | |
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217 peerp = &peers->peer; |
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218 |
| 884 | 219 for (i = 0; i < u.naddrs; i++) { |
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220 peer[i].sockaddr = u.addrs[i].sockaddr; |
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221 peer[i].socklen = u.addrs[i].socklen; |
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222 peer[i].name = u.addrs[i].name; |
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223 peer[i].weight = 1; |
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224 peer[i].effective_weight = 1; |
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225 peer[i].current_weight = 0; |
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226 peer[i].max_fails = 1; |
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227 peer[i].fail_timeout = 10; |
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228 *peerp = &peer[i]; |
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229 peerp = &peer[i].next; |
| 884 | 230 } |
| 231 | |
| 232 us->peer.data = peers; | |
| 233 | |
| 1378 | 234 /* implicitly defined upstream has no backup servers */ |
| 235 | |
| 884 | 236 return NGX_OK; |
| 237 } | |
| 238 | |
| 239 | |
| 240 ngx_int_t | |
| 241 ngx_http_upstream_init_round_robin_peer(ngx_http_request_t *r, | |
| 242 ngx_http_upstream_srv_conf_t *us) | |
| 243 { | |
| 244 ngx_uint_t n; | |
| 245 ngx_http_upstream_rr_peer_data_t *rrp; | |
| 246 | |
| 247 rrp = r->upstream->peer.data; | |
| 248 | |
| 249 if (rrp == NULL) { | |
| 250 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t)); | |
| 251 if (rrp == NULL) { | |
| 252 return NGX_ERROR; | |
| 253 } | |
| 254 | |
| 255 r->upstream->peer.data = rrp; | |
| 256 } | |
| 257 | |
| 258 rrp->peers = us->peer.data; | |
|
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259 rrp->current = NULL; |
| 884 | 260 |
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261 n = rrp->peers->number; |
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262 |
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263 if (rrp->peers->next && rrp->peers->next->number > n) { |
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264 n = rrp->peers->next->number; |
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265 } |
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266 |
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267 if (n <= 8 * sizeof(uintptr_t)) { |
| 884 | 268 rrp->tried = &rrp->data; |
| 269 rrp->data = 0; | |
| 270 | |
| 271 } else { | |
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272 n = (n + (8 * sizeof(uintptr_t) - 1)) / (8 * sizeof(uintptr_t)); |
| 884 | 273 |
| 274 rrp->tried = ngx_pcalloc(r->pool, n * sizeof(uintptr_t)); | |
| 275 if (rrp->tried == NULL) { | |
| 276 return NGX_ERROR; | |
| 277 } | |
| 278 } | |
| 279 | |
| 280 r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer; | |
| 281 r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer; | |
|
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282 r->upstream->peer.tries = ngx_http_upstream_tries(rrp->peers); |
| 884 | 283 #if (NGX_HTTP_SSL) |
|
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|
284 r->upstream->peer.set_session = |
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285 ngx_http_upstream_set_round_robin_peer_session; |
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286 r->upstream->peer.save_session = |
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287 ngx_http_upstream_save_round_robin_peer_session; |
| 884 | 288 #endif |
| 289 | |
| 290 return NGX_OK; | |
| 291 } | |
| 292 | |
| 293 | |
| 294 ngx_int_t | |
| 1658 | 295 ngx_http_upstream_create_round_robin_peer(ngx_http_request_t *r, |
| 296 ngx_http_upstream_resolved_t *ur) | |
| 297 { | |
| 298 u_char *p; | |
| 299 size_t len; | |
|
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300 socklen_t socklen; |
| 1658 | 301 ngx_uint_t i, n; |
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302 struct sockaddr *sockaddr; |
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303 ngx_http_upstream_rr_peer_t *peer, **peerp; |
| 1658 | 304 ngx_http_upstream_rr_peers_t *peers; |
| 305 ngx_http_upstream_rr_peer_data_t *rrp; | |
| 306 | |
| 307 rrp = r->upstream->peer.data; | |
| 308 | |
| 309 if (rrp == NULL) { | |
| 310 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t)); | |
| 311 if (rrp == NULL) { | |
| 312 return NGX_ERROR; | |
| 313 } | |
| 314 | |
| 315 r->upstream->peer.data = rrp; | |
| 316 } | |
| 317 | |
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318 peers = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_rr_peers_t)); |
| 1658 | 319 if (peers == NULL) { |
| 320 return NGX_ERROR; | |
| 321 } | |
| 322 | |
|
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323 peer = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_rr_peer_t) |
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324 * ur->naddrs); |
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325 if (peer == NULL) { |
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326 return NGX_ERROR; |
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327 } |
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328 |
| 1658 | 329 peers->single = (ur->naddrs == 1); |
| 330 peers->number = ur->naddrs; | |
| 331 peers->name = &ur->host; | |
| 332 | |
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333 if (ur->sockaddr) { |
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334 peer[0].sockaddr = ur->sockaddr; |
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335 peer[0].socklen = ur->socklen; |
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336 peer[0].name = ur->host; |
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337 peer[0].weight = 1; |
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338 peer[0].effective_weight = 1; |
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339 peer[0].current_weight = 0; |
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340 peer[0].max_fails = 1; |
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341 peer[0].fail_timeout = 10; |
|
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342 peers->peer = peer; |
| 1658 | 343 |
|
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|
344 } else { |
|
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|
345 peerp = &peers->peer; |
|
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346 |
|
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|
347 for (i = 0; i < ur->naddrs; i++) { |
| 1658 | 348 |
|
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|
349 socklen = ur->addrs[i].socklen; |
|
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|
350 |
|
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|
351 sockaddr = ngx_palloc(r->pool, socklen); |
|
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352 if (sockaddr == NULL) { |
|
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353 return NGX_ERROR; |
|
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|
354 } |
|
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355 |
|
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|
356 ngx_memcpy(sockaddr, ur->addrs[i].sockaddr, socklen); |
|
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357 |
|
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358 switch (sockaddr->sa_family) { |
|
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359 #if (NGX_HAVE_INET6) |
|
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360 case AF_INET6: |
|
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361 ((struct sockaddr_in6 *) sockaddr)->sin6_port = htons(ur->port); |
|
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362 break; |
|
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|
363 #endif |
|
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|
364 default: /* AF_INET */ |
|
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|
365 ((struct sockaddr_in *) sockaddr)->sin_port = htons(ur->port); |
|
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366 } |
|
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367 |
|
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368 p = ngx_pnalloc(r->pool, NGX_SOCKADDR_STRLEN); |
|
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369 if (p == NULL) { |
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370 return NGX_ERROR; |
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371 } |
| 1658 | 372 |
|
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|
373 len = ngx_sock_ntop(sockaddr, socklen, p, NGX_SOCKADDR_STRLEN, 1); |
| 1658 | 374 |
|
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375 peer[i].sockaddr = sockaddr; |
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|
376 peer[i].socklen = socklen; |
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377 peer[i].name.len = len; |
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|
378 peer[i].name.data = p; |
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379 peer[i].weight = 1; |
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380 peer[i].effective_weight = 1; |
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381 peer[i].current_weight = 0; |
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|
382 peer[i].max_fails = 1; |
|
ab540dd44528
Upstream: simplified some code that accesses peers.
Ruslan Ermilov <ru@nginx.com>
parents:
5717
diff
changeset
|
383 peer[i].fail_timeout = 10; |
|
6100
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
384 *peerp = &peer[i]; |
|
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
385 peerp = &peer[i].next; |
|
2422
7af1e5fe102c
variable support for unix sockets in fastcgi_pass and proxy_pass
Igor Sysoev <igor@sysoev.ru>
parents:
2204
diff
changeset
|
386 } |
| 1658 | 387 } |
| 388 | |
| 389 rrp->peers = peers; | |
|
6100
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
390 rrp->current = NULL; |
| 1658 | 391 |
| 392 if (rrp->peers->number <= 8 * sizeof(uintptr_t)) { | |
| 393 rrp->tried = &rrp->data; | |
| 394 rrp->data = 0; | |
| 395 | |
| 396 } else { | |
| 397 n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1)) | |
| 398 / (8 * sizeof(uintptr_t)); | |
| 399 | |
| 400 rrp->tried = ngx_pcalloc(r->pool, n * sizeof(uintptr_t)); | |
| 401 if (rrp->tried == NULL) { | |
| 402 return NGX_ERROR; | |
| 403 } | |
| 404 } | |
| 405 | |
| 406 r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer; | |
| 407 r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer; | |
|
5831
575175ebf4b4
Upstream: included backup peers into peer.tries.
Roman Arutyunyan <arut@nginx.com>
parents:
5756
diff
changeset
|
408 r->upstream->peer.tries = ngx_http_upstream_tries(rrp->peers); |
| 1658 | 409 #if (NGX_HTTP_SSL) |
|
3964
ff127ba3b091
do not try to reuse and save a SSL session for a peer created on the fly
Igor Sysoev <igor@sysoev.ru>
parents:
2422
diff
changeset
|
410 r->upstream->peer.set_session = ngx_http_upstream_empty_set_session; |
|
ff127ba3b091
do not try to reuse and save a SSL session for a peer created on the fly
Igor Sysoev <igor@sysoev.ru>
parents:
2422
diff
changeset
|
411 r->upstream->peer.save_session = ngx_http_upstream_empty_save_session; |
| 1658 | 412 #endif |
| 413 | |
| 414 return NGX_OK; | |
| 415 } | |
| 416 | |
| 417 | |
| 418 ngx_int_t | |
| 884 | 419 ngx_http_upstream_get_round_robin_peer(ngx_peer_connection_t *pc, void *data) |
| 420 { | |
| 421 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
| 422 | |
| 1378 | 423 ngx_int_t rc; |
| 424 ngx_uint_t i, n; | |
| 425 ngx_http_upstream_rr_peer_t *peer; | |
| 426 ngx_http_upstream_rr_peers_t *peers; | |
| 884 | 427 |
| 428 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
| 429 "get rr peer, try: %ui", pc->tries); | |
| 430 | |
| 431 pc->cached = 0; | |
| 432 pc->connection = NULL; | |
| 433 | |
|
5720
ab540dd44528
Upstream: simplified some code that accesses peers.
Ruslan Ermilov <ru@nginx.com>
parents:
5717
diff
changeset
|
434 peers = rrp->peers; |
| 6102 | 435 ngx_http_upstream_rr_peers_wlock(peers); |
|
5720
ab540dd44528
Upstream: simplified some code that accesses peers.
Ruslan Ermilov <ru@nginx.com>
parents:
5717
diff
changeset
|
436 |
|
ab540dd44528
Upstream: simplified some code that accesses peers.
Ruslan Ermilov <ru@nginx.com>
parents:
5717
diff
changeset
|
437 if (peers->single) { |
|
6100
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
438 peer = peers->peer; |
| 884 | 439 |
|
4914
dcb853acae97
Upstream: honor the "down" flag for a single server.
Ruslan Ermilov <ru@nginx.com>
parents:
4655
diff
changeset
|
440 if (peer->down) { |
|
dcb853acae97
Upstream: honor the "down" flag for a single server.
Ruslan Ermilov <ru@nginx.com>
parents:
4655
diff
changeset
|
441 goto failed; |
|
dcb853acae97
Upstream: honor the "down" flag for a single server.
Ruslan Ermilov <ru@nginx.com>
parents:
4655
diff
changeset
|
442 } |
|
dcb853acae97
Upstream: honor the "down" flag for a single server.
Ruslan Ermilov <ru@nginx.com>
parents:
4655
diff
changeset
|
443 |
|
6100
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
444 rrp->current = peer; |
|
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
445 |
| 884 | 446 } else { |
| 447 | |
| 448 /* there are several peers */ | |
| 449 | |
|
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
450 peer = ngx_http_upstream_get_peer(rrp); |
| 884 | 451 |
|
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
452 if (peer == NULL) { |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
453 goto failed; |
| 884 | 454 } |
| 455 | |
|
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
456 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
|
6100
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
457 "get rr peer, current: %p %i", |
|
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
458 peer, peer->current_weight); |
| 884 | 459 } |
| 460 | |
| 461 pc->sockaddr = peer->sockaddr; | |
| 462 pc->socklen = peer->socklen; | |
| 463 pc->name = &peer->name; | |
| 464 | |
|
6099
6ff0ebd6fbf4
Upstream: track the number of active connections to upstreams.
Ruslan Ermilov <ru@nginx.com>
parents:
5831
diff
changeset
|
465 peer->conns++; |
|
6ff0ebd6fbf4
Upstream: track the number of active connections to upstreams.
Ruslan Ermilov <ru@nginx.com>
parents:
5831
diff
changeset
|
466 |
| 6102 | 467 ngx_http_upstream_rr_peers_unlock(peers); |
| 884 | 468 |
| 469 return NGX_OK; | |
| 470 | |
| 471 failed: | |
| 472 | |
| 1378 | 473 if (peers->next) { |
| 474 | |
| 475 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, pc->log, 0, "backup servers"); | |
| 476 | |
| 477 rrp->peers = peers->next; | |
| 478 | |
|
4991
a384c60d55f3
Upstream: fixed state resetting when switching to backup servers.
Valentin Bartenev <vbart@nginx.com>
parents:
4914
diff
changeset
|
479 n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1)) |
|
a384c60d55f3
Upstream: fixed state resetting when switching to backup servers.
Valentin Bartenev <vbart@nginx.com>
parents:
4914
diff
changeset
|
480 / (8 * sizeof(uintptr_t)); |
|
a384c60d55f3
Upstream: fixed state resetting when switching to backup servers.
Valentin Bartenev <vbart@nginx.com>
parents:
4914
diff
changeset
|
481 |
| 1389 | 482 for (i = 0; i < n; i++) { |
| 1378 | 483 rrp->tried[i] = 0; |
| 484 } | |
| 485 | |
| 6102 | 486 ngx_http_upstream_rr_peers_unlock(peers); |
| 487 | |
| 1378 | 488 rc = ngx_http_upstream_get_round_robin_peer(pc, rrp); |
| 489 | |
| 490 if (rc != NGX_BUSY) { | |
| 491 return rc; | |
| 492 } | |
| 493 | |
| 6102 | 494 ngx_http_upstream_rr_peers_wlock(peers); |
| 1378 | 495 } |
| 496 | |
| 884 | 497 /* all peers failed, mark them as live for quick recovery */ |
| 498 | |
|
6100
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
499 for (peer = peers->peer; peer; peer = peer->next) { |
|
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
500 peer->fails = 0; |
| 884 | 501 } |
| 502 | |
| 6102 | 503 ngx_http_upstream_rr_peers_unlock(peers); |
| 884 | 504 |
| 1378 | 505 pc->name = peers->name; |
| 884 | 506 |
| 507 return NGX_BUSY; | |
| 508 } | |
| 509 | |
| 510 | |
|
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
511 static ngx_http_upstream_rr_peer_t * |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
512 ngx_http_upstream_get_peer(ngx_http_upstream_rr_peer_data_t *rrp) |
|
1344
8f5b5641966c
fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
513 { |
|
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
514 time_t now; |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
515 uintptr_t m; |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
516 ngx_int_t total; |
|
6100
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
517 ngx_uint_t i, n, p; |
|
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
518 ngx_http_upstream_rr_peer_t *peer, *best; |
|
1344
8f5b5641966c
fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
519 |
|
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
520 now = ngx_time(); |
|
1344
8f5b5641966c
fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
521 |
|
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
522 best = NULL; |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
523 total = 0; |
|
1344
8f5b5641966c
fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
524 |
|
6100
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
525 #if (NGX_SUPPRESS_WARN) |
|
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
526 p = 0; |
|
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
527 #endif |
|
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
528 |
|
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
529 for (peer = rrp->peers->peer, i = 0; |
|
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
530 peer; |
|
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
531 peer = peer->next, i++) |
|
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
532 { |
|
1344
8f5b5641966c
fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
533 |
|
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
534 n = i / (8 * sizeof(uintptr_t)); |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
535 m = (uintptr_t) 1 << i % (8 * sizeof(uintptr_t)); |
|
1344
8f5b5641966c
fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
536 |
|
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
537 if (rrp->tried[n] & m) { |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
538 continue; |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
539 } |
|
1344
8f5b5641966c
fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
540 |
|
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
541 if (peer->down) { |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
542 continue; |
|
1344
8f5b5641966c
fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
543 } |
|
8f5b5641966c
fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
544 |
|
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
545 if (peer->max_fails |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
546 && peer->fails >= peer->max_fails |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
547 && now - peer->checked <= peer->fail_timeout) |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
548 { |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
549 continue; |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
550 } |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
551 |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
552 peer->current_weight += peer->effective_weight; |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
553 total += peer->effective_weight; |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
554 |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
555 if (peer->effective_weight < peer->weight) { |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
556 peer->effective_weight++; |
|
4010
74a93d3fdd85
Fixing cpu hog with all upstream servers marked "down".
Maxim Dounin <mdounin@mdounin.ru>
parents:
3964
diff
changeset
|
557 } |
|
74a93d3fdd85
Fixing cpu hog with all upstream servers marked "down".
Maxim Dounin <mdounin@mdounin.ru>
parents:
3964
diff
changeset
|
558 |
|
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
559 if (best == NULL || peer->current_weight > best->current_weight) { |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
560 best = peer; |
|
6100
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
561 p = i; |
|
1344
8f5b5641966c
fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
562 } |
|
8f5b5641966c
fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
563 } |
|
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
564 |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
565 if (best == NULL) { |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
566 return NULL; |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
567 } |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
568 |
|
6100
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
569 rrp->current = best; |
|
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
570 |
|
6100
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
571 n = p / (8 * sizeof(uintptr_t)); |
|
c44459611d91
Upstream: store peers as a linked list.
Ruslan Ermilov <ru@nginx.com>
parents:
6099
diff
changeset
|
572 m = (uintptr_t) 1 << p % (8 * sizeof(uintptr_t)); |
|
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
573 |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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574 rrp->tried[n] |= m; |
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|
575 |
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576 best->current_weight -= total; |
|
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577 |
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578 if (now - best->checked > best->fail_timeout) { |
|
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|
579 best->checked = now; |
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580 } |
|
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581 |
|
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Upstream: smooth weighted round-robin balancing.
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582 return best; |
|
1344
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|
583 } |
|
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584 |
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585 |
| 884 | 586 void |
| 587 ngx_http_upstream_free_round_robin_peer(ngx_peer_connection_t *pc, void *data, | |
| 588 ngx_uint_t state) | |
| 589 { | |
| 590 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
| 591 | |
| 592 time_t now; | |
| 593 ngx_http_upstream_rr_peer_t *peer; | |
| 594 | |
| 595 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
| 596 "free rr peer %ui %ui", pc->tries, state); | |
| 597 | |
| 598 /* TODO: NGX_PEER_KEEPALIVE */ | |
| 599 | |
|
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600 peer = rrp->current; |
|
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601 |
| 1378 | 602 if (rrp->peers->single) { |
|
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changeset
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603 |
|
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604 peer->conns--; |
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605 |
| 884 | 606 pc->tries = 0; |
| 607 return; | |
| 608 } | |
| 609 | |
| 6102 | 610 ngx_http_upstream_rr_peers_rlock(rrp->peers); |
| 611 ngx_http_upstream_rr_peer_lock(rrp->peers, peer); | |
| 612 | |
| 884 | 613 if (state & NGX_PEER_FAILED) { |
| 614 now = ngx_time(); | |
| 615 | |
| 616 peer->fails++; | |
| 617 peer->accessed = now; | |
|
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changeset
|
618 peer->checked = now; |
| 884 | 619 |
|
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Igor Sysoev <igor@sysoev.ru>
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|
620 if (peer->max_fails) { |
|
4621
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diff
changeset
|
621 peer->effective_weight -= peer->weight / peer->max_fails; |
|
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622 } |
|
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|
623 |
|
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|
624 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
|
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625 "free rr peer failed: %p %i", |
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626 peer, peer->effective_weight); |
|
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|
627 |
|
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|
628 if (peer->effective_weight < 0) { |
|
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|
629 peer->effective_weight = 0; |
| 884 | 630 } |
| 631 | |
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632 } else { |
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633 |
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634 /* mark peer live if check passed */ |
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635 |
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636 if (peer->accessed < peer->checked) { |
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637 peer->fails = 0; |
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638 } |
| 884 | 639 } |
| 640 | |
|
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641 peer->conns--; |
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642 |
| 6102 | 643 ngx_http_upstream_rr_peer_unlock(rrp->peers, peer); |
| 644 ngx_http_upstream_rr_peers_unlock(rrp->peers); | |
| 645 | |
| 884 | 646 if (pc->tries) { |
| 647 pc->tries--; | |
| 648 } | |
| 649 } | |
| 650 | |
| 651 | |
| 652 #if (NGX_HTTP_SSL) | |
| 653 | |
|
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654 ngx_int_t |
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655 ngx_http_upstream_set_round_robin_peer_session(ngx_peer_connection_t *pc, |
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656 void *data) |
| 884 | 657 { |
| 658 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
| 659 | |
|
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660 ngx_int_t rc; |
| 884 | 661 ngx_ssl_session_t *ssl_session; |
| 662 ngx_http_upstream_rr_peer_t *peer; | |
| 663 | |
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664 peer = rrp->current; |
|
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665 |
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666 ssl_session = peer->ssl_session; |
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667 |
|
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|
668 rc = ngx_ssl_set_session(pc->connection, ssl_session); |
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|
669 |
|
5756
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|
670 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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671 "set session: %p", ssl_session); |
|
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|
672 |
|
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|
673 return rc; |
|
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|
674 } |
|
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|
675 |
|
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changeset
|
676 |
|
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|
677 void |
|
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|
678 ngx_http_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc, |
|
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|
679 void *data) |
|
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|
680 { |
|
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|
681 ngx_http_upstream_rr_peer_data_t *rrp = data; |
|
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|
682 |
|
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|
683 ngx_ssl_session_t *old_ssl_session, *ssl_session; |
|
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|
684 ngx_http_upstream_rr_peer_t *peer; |
|
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|
685 |
| 884 | 686 ssl_session = ngx_ssl_get_session(pc->connection); |
| 687 | |
| 688 if (ssl_session == NULL) { | |
| 689 return; | |
| 690 } | |
| 691 | |
|
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|
692 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
|
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|
693 "save session: %p", ssl_session); |
|
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|
694 |
|
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|
695 peer = rrp->current; |
| 884 | 696 |
|
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|
697 old_ssl_session = peer->ssl_session; |
| 884 | 698 peer->ssl_session = ssl_session; |
|
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|
699 |
|
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|
700 if (old_ssl_session) { |
|
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changeset
|
701 |
|
5756
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|
702 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
|
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|
703 "old session: %p", old_ssl_session); |
|
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|
704 |
| 884 | 705 /* TODO: may block */ |
|
1284
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changeset
|
706 |
|
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changeset
|
707 ngx_ssl_free_session(old_ssl_session); |
| 884 | 708 } |
| 709 } | |
| 710 | |
|
3964
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changeset
|
711 |
|
ff127ba3b091
do not try to reuse and save a SSL session for a peer created on the fly
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|
712 static ngx_int_t |
|
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|
713 ngx_http_upstream_empty_set_session(ngx_peer_connection_t *pc, void *data) |
|
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|
714 { |
|
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|
715 return NGX_OK; |
|
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|
716 } |
|
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|
717 |
|
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|
718 |
|
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|
719 static void |
|
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|
720 ngx_http_upstream_empty_save_session(ngx_peer_connection_t *pc, void *data) |
|
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|
721 { |
|
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|
722 return; |
|
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|
723 } |
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|
724 |
| 884 | 725 #endif |