Mercurial > hg > nginx
annotate src/http/ngx_http_upstream_round_robin.c @ 1658:13f8dec720b5
proxy_pass variables support
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Tue, 27 Nov 2007 13:34:13 +0000 |
| parents | 771c4071f5f6 |
| children | abbef7b5dab8 |
| rev | line source |
|---|---|
| 884 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4 */ | |
| 5 | |
| 6 | |
| 7 #include <ngx_config.h> | |
| 8 #include <ngx_core.h> | |
| 9 #include <ngx_http.h> | |
| 10 | |
| 11 | |
| 1379 | 12 static int ngx_http_upstream_cmp_servers(const void *one, const void *two); |
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13 static ngx_uint_t |
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14 ngx_http_upstream_get_peer(ngx_http_upstream_rr_peers_t *peers); |
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15 |
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16 |
| 884 | 17 ngx_int_t |
| 18 ngx_http_upstream_init_round_robin(ngx_conf_t *cf, | |
| 19 ngx_http_upstream_srv_conf_t *us) | |
| 20 { | |
| 21 ngx_url_t u; | |
| 22 ngx_uint_t i, j, n; | |
| 23 ngx_http_upstream_server_t *server; | |
| 1378 | 24 ngx_http_upstream_rr_peers_t *peers, *backup; |
| 884 | 25 |
| 26 us->peer.init = ngx_http_upstream_init_round_robin_peer; | |
| 27 | |
| 28 if (us->servers) { | |
| 29 server = us->servers->elts; | |
| 30 | |
| 1378 | 31 n = 0; |
| 32 | |
| 884 | 33 for (i = 0; i < us->servers->nelts; i++) { |
| 1378 | 34 if (server[i].backup) { |
| 35 continue; | |
| 36 } | |
| 37 | |
| 884 | 38 n += server[i].naddrs; |
| 39 } | |
| 40 | |
| 41 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
| 42 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
| 43 if (peers == NULL) { | |
| 44 return NGX_ERROR; | |
| 45 } | |
| 46 | |
| 1378 | 47 peers->single = (n == 1); |
| 884 | 48 peers->number = n; |
| 49 peers->name = &us->host; | |
| 50 | |
| 51 n = 0; | |
| 52 | |
| 53 for (i = 0; i < us->servers->nelts; i++) { | |
| 54 for (j = 0; j < server[i].naddrs; j++) { | |
| 1378 | 55 if (server[i].backup) { |
| 56 continue; | |
| 57 } | |
| 58 | |
| 884 | 59 peers->peer[n].sockaddr = server[i].addrs[j].sockaddr; |
| 60 peers->peer[n].socklen = server[i].addrs[j].socklen; | |
| 61 peers->peer[n].name = server[i].addrs[j].name; | |
| 62 peers->peer[n].max_fails = server[i].max_fails; | |
| 63 peers->peer[n].fail_timeout = server[i].fail_timeout; | |
| 64 peers->peer[n].down = server[i].down; | |
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65 peers->peer[n].weight = server[i].down ? 0 : server[i].weight; |
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66 peers->peer[n].current_weight = peers->peer[n].weight; |
| 884 | 67 n++; |
| 68 } | |
| 69 } | |
| 70 | |
| 71 us->peer.data = peers; | |
| 72 | |
| 1379 | 73 ngx_sort(&peers->peer[0], (size_t) n, |
| 74 sizeof(ngx_http_upstream_rr_peer_t), | |
| 75 ngx_http_upstream_cmp_servers); | |
| 76 | |
| 1378 | 77 /* backup servers */ |
| 78 | |
| 79 n = 0; | |
| 80 | |
| 81 for (i = 0; i < us->servers->nelts; i++) { | |
| 82 if (!server[i].backup) { | |
| 83 continue; | |
| 84 } | |
| 85 | |
| 86 n += server[i].naddrs; | |
| 87 } | |
| 88 | |
| 89 if (n == 0) { | |
| 90 return NGX_OK; | |
| 91 } | |
| 92 | |
| 93 backup = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
| 94 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
| 95 if (backup == NULL) { | |
| 96 return NGX_ERROR; | |
| 97 } | |
| 98 | |
| 99 peers->single = 0; | |
| 100 backup->single = 0; | |
| 101 backup->number = n; | |
| 102 backup->name = &us->host; | |
| 103 | |
| 104 n = 0; | |
| 105 | |
| 106 for (i = 0; i < us->servers->nelts; i++) { | |
| 107 for (j = 0; j < server[i].naddrs; j++) { | |
| 108 if (!server[i].backup) { | |
| 109 continue; | |
| 110 } | |
| 111 | |
| 112 backup->peer[n].sockaddr = server[i].addrs[j].sockaddr; | |
| 113 backup->peer[n].socklen = server[i].addrs[j].socklen; | |
| 114 backup->peer[n].name = server[i].addrs[j].name; | |
| 115 backup->peer[n].weight = server[i].weight; | |
| 116 backup->peer[n].current_weight = server[i].weight; | |
| 117 backup->peer[n].max_fails = server[i].max_fails; | |
| 118 backup->peer[n].fail_timeout = server[i].fail_timeout; | |
| 119 backup->peer[n].down = server[i].down; | |
| 120 n++; | |
| 121 } | |
| 122 } | |
| 123 | |
| 124 peers->next = backup; | |
| 125 | |
| 1379 | 126 ngx_sort(&backup->peer[0], (size_t) n, |
| 127 sizeof(ngx_http_upstream_rr_peer_t), | |
| 128 ngx_http_upstream_cmp_servers); | |
| 129 | |
| 884 | 130 return NGX_OK; |
| 131 } | |
| 132 | |
| 133 | |
| 134 /* an upstream implicitly defined by proxy_pass, etc. */ | |
| 135 | |
| 906 | 136 if (us->port == 0 && us->default_port == 0) { |
| 137 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, | |
| 138 "no port in upstream \"%V\" in %s:%ui", | |
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139 &us->host, us->file_name, us->line); |
| 906 | 140 return NGX_ERROR; |
| 141 } | |
| 142 | |
| 884 | 143 ngx_memzero(&u, sizeof(ngx_url_t)); |
| 144 | |
| 145 u.host = us->host; | |
| 916 | 146 u.port = (in_port_t) (us->port ? us->port : us->default_port); |
| 884 | 147 |
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148 if (ngx_inet_resolve_host(cf->pool, &u) != NGX_OK) { |
| 884 | 149 if (u.err) { |
| 150 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, | |
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151 "%s in upstream \"%V\" in %s:%ui", |
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152 u.err, &us->host, us->file_name, us->line); |
| 884 | 153 } |
| 154 | |
| 155 return NGX_ERROR; | |
| 156 } | |
| 157 | |
| 158 n = u.naddrs; | |
| 159 | |
| 160 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
| 161 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
| 162 if (peers == NULL) { | |
| 163 return NGX_ERROR; | |
| 164 } | |
| 165 | |
| 1378 | 166 peers->single = (n == 1); |
| 884 | 167 peers->number = n; |
| 168 peers->name = &us->host; | |
| 169 | |
| 170 for (i = 0; i < u.naddrs; i++) { | |
| 1564 | 171 peers->peer[i].sockaddr = u.addrs[i].sockaddr; |
| 172 peers->peer[i].socklen = u.addrs[i].socklen; | |
| 173 peers->peer[i].name = u.addrs[i].name; | |
| 174 peers->peer[i].weight = 1; | |
| 175 peers->peer[i].current_weight = 1; | |
| 176 peers->peer[i].max_fails = 1; | |
| 177 peers->peer[i].fail_timeout = 10; | |
| 884 | 178 } |
| 179 | |
| 180 us->peer.data = peers; | |
| 181 | |
| 1378 | 182 /* implicitly defined upstream has no backup servers */ |
| 183 | |
| 884 | 184 return NGX_OK; |
| 185 } | |
| 186 | |
| 187 | |
| 1379 | 188 static int |
| 189 ngx_http_upstream_cmp_servers(const void *one, const void *two) | |
| 190 { | |
| 191 ngx_http_upstream_rr_peer_t *first, *second; | |
| 192 | |
| 193 first = (ngx_http_upstream_rr_peer_t *) one; | |
| 194 second = (ngx_http_upstream_rr_peer_t *) two; | |
| 195 | |
| 196 return (first->weight < second->weight); | |
| 197 } | |
| 198 | |
| 199 | |
| 884 | 200 ngx_int_t |
| 201 ngx_http_upstream_init_round_robin_peer(ngx_http_request_t *r, | |
| 202 ngx_http_upstream_srv_conf_t *us) | |
| 203 { | |
| 204 ngx_uint_t n; | |
| 205 ngx_http_upstream_rr_peer_data_t *rrp; | |
| 206 | |
| 207 rrp = r->upstream->peer.data; | |
| 208 | |
| 209 if (rrp == NULL) { | |
| 210 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t)); | |
| 211 if (rrp == NULL) { | |
| 212 return NGX_ERROR; | |
| 213 } | |
| 214 | |
| 215 r->upstream->peer.data = rrp; | |
| 216 } | |
| 217 | |
| 218 rrp->peers = us->peer.data; | |
| 219 rrp->current = 0; | |
| 220 | |
| 221 if (rrp->peers->number <= 8 * sizeof(uintptr_t)) { | |
| 222 rrp->tried = &rrp->data; | |
| 223 rrp->data = 0; | |
| 224 | |
| 225 } else { | |
| 226 n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1)) | |
| 227 / (8 * sizeof(uintptr_t)); | |
| 228 | |
| 229 rrp->tried = ngx_pcalloc(r->pool, n * sizeof(uintptr_t)); | |
| 230 if (rrp->tried == NULL) { | |
| 231 return NGX_ERROR; | |
| 232 } | |
| 233 } | |
| 234 | |
| 235 r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer; | |
| 236 r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer; | |
| 237 r->upstream->peer.tries = rrp->peers->number; | |
| 238 #if (NGX_HTTP_SSL) | |
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239 r->upstream->peer.set_session = |
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240 ngx_http_upstream_set_round_robin_peer_session; |
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241 r->upstream->peer.save_session = |
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242 ngx_http_upstream_save_round_robin_peer_session; |
| 884 | 243 #endif |
| 244 | |
| 245 return NGX_OK; | |
| 246 } | |
| 247 | |
| 248 | |
| 249 ngx_int_t | |
| 1658 | 250 ngx_http_upstream_create_round_robin_peer(ngx_http_request_t *r, |
| 251 ngx_http_upstream_resolved_t *ur) | |
| 252 { | |
| 253 u_char *p; | |
| 254 size_t len; | |
| 255 ngx_uint_t i, n; | |
| 256 struct sockaddr_in *sin; | |
| 257 ngx_http_upstream_rr_peers_t *peers; | |
| 258 ngx_http_upstream_rr_peer_data_t *rrp; | |
| 259 | |
| 260 rrp = r->upstream->peer.data; | |
| 261 | |
| 262 if (rrp == NULL) { | |
| 263 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t)); | |
| 264 if (rrp == NULL) { | |
| 265 return NGX_ERROR; | |
| 266 } | |
| 267 | |
| 268 r->upstream->peer.data = rrp; | |
| 269 } | |
| 270 | |
| 271 peers = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
| 272 + sizeof(ngx_http_upstream_rr_peer_t) * (ur->naddrs - 1)); | |
| 273 if (peers == NULL) { | |
| 274 return NGX_ERROR; | |
| 275 } | |
| 276 | |
| 277 peers->single = (ur->naddrs == 1); | |
| 278 peers->number = ur->naddrs; | |
| 279 peers->name = &ur->host; | |
| 280 | |
| 281 for (i = 0; i < ur->naddrs; i++) { | |
| 282 | |
| 283 len = INET_ADDRSTRLEN - 1 + 1 + sizeof(":65536") - 1; | |
| 284 | |
| 285 p = ngx_palloc(r->pool, len); | |
| 286 if (p == NULL) { | |
| 287 return NGX_ERROR; | |
| 288 } | |
| 289 | |
| 290 len = ngx_inet_ntop(AF_INET, &ur->addrs[i], p, INET_ADDRSTRLEN); | |
| 291 len = ngx_sprintf(&p[len], ":%d", ur->port) - p; | |
| 292 | |
| 293 sin = ngx_pcalloc(r->pool, sizeof(struct sockaddr_in)); | |
| 294 if (sin == NULL) { | |
| 295 return NGX_ERROR; | |
| 296 } | |
| 297 | |
| 298 sin->sin_family = AF_INET; | |
| 299 sin->sin_port = htons(ur->port); | |
| 300 sin->sin_addr.s_addr = ur->addrs[i]; | |
| 301 | |
| 302 peers->peer[i].sockaddr = (struct sockaddr *) sin; | |
| 303 peers->peer[i].socklen = sizeof(struct sockaddr_in); | |
| 304 peers->peer[i].name.len = len; | |
| 305 peers->peer[i].name.data = p; | |
| 306 peers->peer[i].weight = 1; | |
| 307 peers->peer[i].current_weight = 1; | |
| 308 peers->peer[i].max_fails = 1; | |
| 309 peers->peer[i].fail_timeout = 10; | |
| 310 } | |
| 311 | |
| 312 rrp->peers = peers; | |
| 313 rrp->current = 0; | |
| 314 | |
| 315 if (rrp->peers->number <= 8 * sizeof(uintptr_t)) { | |
| 316 rrp->tried = &rrp->data; | |
| 317 rrp->data = 0; | |
| 318 | |
| 319 } else { | |
| 320 n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1)) | |
| 321 / (8 * sizeof(uintptr_t)); | |
| 322 | |
| 323 rrp->tried = ngx_pcalloc(r->pool, n * sizeof(uintptr_t)); | |
| 324 if (rrp->tried == NULL) { | |
| 325 return NGX_ERROR; | |
| 326 } | |
| 327 } | |
| 328 | |
| 329 r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer; | |
| 330 r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer; | |
| 331 r->upstream->peer.tries = rrp->peers->number; | |
| 332 #if (NGX_HTTP_SSL) | |
| 333 r->upstream->peer.set_session = | |
| 334 ngx_http_upstream_set_round_robin_peer_session; | |
| 335 r->upstream->peer.save_session = | |
| 336 ngx_http_upstream_save_round_robin_peer_session; | |
| 337 #endif | |
| 338 | |
| 339 return NGX_OK; | |
| 340 } | |
| 341 | |
| 342 | |
| 343 ngx_int_t | |
| 884 | 344 ngx_http_upstream_get_round_robin_peer(ngx_peer_connection_t *pc, void *data) |
| 345 { | |
| 346 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
| 347 | |
| 1378 | 348 time_t now; |
| 349 uintptr_t m; | |
| 350 ngx_int_t rc; | |
| 351 ngx_uint_t i, n; | |
| 352 ngx_connection_t *c; | |
| 353 ngx_http_upstream_rr_peer_t *peer; | |
| 354 ngx_http_upstream_rr_peers_t *peers; | |
| 884 | 355 |
| 356 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
| 357 "get rr peer, try: %ui", pc->tries); | |
| 358 | |
| 359 now = ngx_time(); | |
| 360 | |
| 361 /* ngx_lock_mutex(rrp->peers->mutex); */ | |
| 362 | |
| 363 if (rrp->peers->last_cached) { | |
| 364 | |
| 365 /* cached connection */ | |
| 366 | |
| 367 c = rrp->peers->cached[rrp->peers->last_cached]; | |
| 368 rrp->peers->last_cached--; | |
| 369 | |
| 370 /* ngx_unlock_mutex(ppr->peers->mutex); */ | |
| 371 | |
| 372 #if (NGX_THREADS) | |
| 373 c->read->lock = c->read->own_lock; | |
| 374 c->write->lock = c->write->own_lock; | |
| 375 #endif | |
| 376 | |
| 377 pc->connection = c; | |
| 378 pc->cached = 1; | |
| 379 | |
| 380 return NGX_OK; | |
| 381 } | |
| 382 | |
| 383 pc->cached = 0; | |
| 384 pc->connection = NULL; | |
| 385 | |
| 1378 | 386 if (rrp->peers->single) { |
| 884 | 387 peer = &rrp->peers->peer[0]; |
| 388 | |
| 389 } else { | |
| 390 | |
| 391 /* there are several peers */ | |
| 392 | |
| 393 if (pc->tries == rrp->peers->number) { | |
| 394 | |
| 395 /* it's a first try - get a current peer */ | |
| 396 | |
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397 i = pc->tries; |
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398 |
| 884 | 399 for ( ;; ) { |
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400 rrp->current = ngx_http_upstream_get_peer(rrp->peers); |
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401 |
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402 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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403 "get rr peer, current: %ui %i", |
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404 rrp->current, |
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405 rrp->peers->peer[rrp->current].current_weight); |
| 884 | 406 |
| 407 n = rrp->current / (8 * sizeof(uintptr_t)); | |
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408 m = (uintptr_t) 1 << rrp->current % (8 * sizeof(uintptr_t)); |
| 884 | 409 |
| 410 if (!(rrp->tried[n] & m)) { | |
| 411 peer = &rrp->peers->peer[rrp->current]; | |
| 412 | |
| 413 if (!peer->down) { | |
| 414 | |
| 415 if (peer->max_fails == 0 | |
| 416 || peer->fails < peer->max_fails) | |
| 417 { | |
| 418 break; | |
| 419 } | |
| 420 | |
| 421 if (now - peer->accessed > peer->fail_timeout) { | |
| 422 peer->fails = 0; | |
| 423 break; | |
| 424 } | |
| 425 | |
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426 peer->current_weight = 0; |
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427 |
| 884 | 428 } else { |
| 429 rrp->tried[n] |= m; | |
| 430 } | |
| 431 | |
| 432 pc->tries--; | |
| 433 } | |
| 434 | |
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435 if (pc->tries == 0) { |
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436 goto failed; |
| 884 | 437 } |
| 438 | |
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439 if (--i == 0) { |
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440 ngx_log_error(NGX_LOG_ALERT, pc->log, 0, |
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441 "round robin upstream stuck on %ui tries", |
|
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442 pc->tries); |
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443 goto failed; |
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|
444 } |
| 884 | 445 } |
| 446 | |
| 447 peer->current_weight--; | |
| 448 | |
| 449 } else { | |
|
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450 |
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451 i = pc->tries; |
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452 |
| 884 | 453 for ( ;; ) { |
| 454 n = rrp->current / (8 * sizeof(uintptr_t)); | |
|
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455 m = (uintptr_t) 1 << rrp->current % (8 * sizeof(uintptr_t)); |
| 884 | 456 |
| 457 if (!(rrp->tried[n] & m)) { | |
| 458 | |
| 459 peer = &rrp->peers->peer[rrp->current]; | |
| 460 | |
| 461 if (!peer->down) { | |
| 462 | |
| 463 if (peer->max_fails == 0 | |
| 464 || peer->fails < peer->max_fails) | |
| 465 { | |
| 466 break; | |
| 467 } | |
| 468 | |
| 469 if (now - peer->accessed > peer->fail_timeout) { | |
| 470 peer->fails = 0; | |
| 471 break; | |
| 472 } | |
| 473 | |
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474 peer->current_weight = 0; |
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475 |
| 884 | 476 } else { |
| 477 rrp->tried[n] |= m; | |
| 478 } | |
| 479 | |
| 480 pc->tries--; | |
| 481 } | |
| 482 | |
| 483 rrp->current++; | |
| 484 | |
| 485 if (rrp->current >= rrp->peers->number) { | |
| 486 rrp->current = 0; | |
| 487 } | |
| 488 | |
|
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489 if (pc->tries == 0) { |
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490 goto failed; |
| 884 | 491 } |
| 492 | |
|
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493 if (--i == 0) { |
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494 ngx_log_error(NGX_LOG_ALERT, pc->log, 0, |
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495 "round robin upstream stuck on %ui tries", |
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496 pc->tries); |
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497 goto failed; |
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498 } |
| 884 | 499 } |
| 500 | |
| 501 peer->current_weight--; | |
| 502 } | |
| 503 | |
| 504 rrp->tried[n] |= m; | |
| 505 } | |
| 506 | |
| 507 pc->sockaddr = peer->sockaddr; | |
| 508 pc->socklen = peer->socklen; | |
| 509 pc->name = &peer->name; | |
| 510 | |
| 511 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
| 512 | |
| 1378 | 513 if (pc->tries == 1 && rrp->peers->next) { |
| 514 pc->tries += rrp->peers->next->number; | |
| 515 | |
| 516 n = rrp->peers->next->number / (8 * sizeof(uintptr_t)) + 1; | |
| 1389 | 517 for (i = 0; i < n; i++) { |
| 1378 | 518 rrp->tried[i] = 0; |
| 519 } | |
| 520 } | |
| 521 | |
| 884 | 522 return NGX_OK; |
| 523 | |
| 524 failed: | |
| 525 | |
| 1378 | 526 peers = rrp->peers; |
| 527 | |
| 528 if (peers->next) { | |
| 529 | |
| 530 /* ngx_unlock_mutex(peers->mutex); */ | |
| 531 | |
| 532 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, pc->log, 0, "backup servers"); | |
| 533 | |
| 534 rrp->peers = peers->next; | |
| 535 pc->tries = rrp->peers->number; | |
| 536 | |
| 537 n = rrp->peers->number / (8 * sizeof(uintptr_t)) + 1; | |
| 1389 | 538 for (i = 0; i < n; i++) { |
| 1378 | 539 rrp->tried[i] = 0; |
| 540 } | |
| 541 | |
| 542 rc = ngx_http_upstream_get_round_robin_peer(pc, rrp); | |
| 543 | |
| 544 if (rc != NGX_BUSY) { | |
| 545 return rc; | |
| 546 } | |
| 547 | |
| 548 /* ngx_lock_mutex(peers->mutex); */ | |
| 549 } | |
| 550 | |
| 884 | 551 /* all peers failed, mark them as live for quick recovery */ |
| 552 | |
| 1378 | 553 for (i = 0; i < peers->number; i++) { |
| 554 peers->peer[i].fails = 0; | |
| 884 | 555 } |
| 556 | |
| 1378 | 557 /* ngx_unlock_mutex(peers->mutex); */ |
| 884 | 558 |
| 1378 | 559 pc->name = peers->name; |
| 884 | 560 |
| 561 return NGX_BUSY; | |
| 562 } | |
| 563 | |
| 564 | |
|
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565 static ngx_uint_t |
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566 ngx_http_upstream_get_peer(ngx_http_upstream_rr_peers_t *peers) |
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567 { |
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568 ngx_uint_t i, n; |
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569 ngx_http_upstream_rr_peer_t *peer; |
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570 |
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571 peer = &peers->peer[0]; |
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572 |
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573 for ( ;; ) { |
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574 |
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575 for (i = 0; i < peers->number; i++) { |
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576 |
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577 if (peer[i].current_weight <= 0) { |
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578 continue; |
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579 } |
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580 |
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581 n = i; |
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582 |
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583 while (i < peers->number - 1) { |
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584 |
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585 i++; |
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586 |
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587 if (peer[i].current_weight <= 0) { |
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588 continue; |
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589 } |
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590 |
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591 if (peer[n].current_weight * 1000 / peer[i].current_weight |
|
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592 > peer[n].weight * 1000 / peer[i].weight) |
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593 { |
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594 return n; |
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595 } |
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596 |
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597 n = i; |
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598 } |
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599 |
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600 if (peer[i].current_weight > 0) { |
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601 n = i; |
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602 } |
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603 |
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604 return n; |
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605 } |
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606 |
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607 for (i = 0; i < peers->number; i++) { |
|
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771c4071f5f6
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608 peer[i].current_weight += peer[i].weight; |
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609 } |
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610 } |
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611 } |
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612 |
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613 |
| 884 | 614 void |
| 615 ngx_http_upstream_free_round_robin_peer(ngx_peer_connection_t *pc, void *data, | |
| 616 ngx_uint_t state) | |
| 617 { | |
| 618 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
| 619 | |
| 620 time_t now; | |
| 621 ngx_http_upstream_rr_peer_t *peer; | |
| 622 | |
| 623 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
| 624 "free rr peer %ui %ui", pc->tries, state); | |
| 625 | |
| 626 if (state == 0 && pc->tries == 0) { | |
| 627 return; | |
| 628 } | |
| 629 | |
| 630 /* TODO: NGX_PEER_KEEPALIVE */ | |
| 631 | |
| 1378 | 632 if (rrp->peers->single) { |
| 884 | 633 pc->tries = 0; |
| 634 return; | |
| 635 } | |
| 636 | |
| 637 if (state & NGX_PEER_FAILED) { | |
| 638 now = ngx_time(); | |
| 639 | |
| 640 peer = &rrp->peers->peer[rrp->current]; | |
| 641 | |
| 642 /* ngx_lock_mutex(rrp->peers->mutex); */ | |
| 643 | |
| 644 peer->fails++; | |
| 645 peer->accessed = now; | |
| 646 | |
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647 peer->current_weight -= peer->weight / peer->max_fails; |
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648 |
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649 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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650 "free rr peer failed: %ui %i", |
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651 rrp->current, peer->current_weight); |
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652 |
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653 if (peer->current_weight < 0) { |
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654 peer->current_weight = 0; |
| 884 | 655 } |
| 656 | |
| 657 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
| 658 } | |
| 659 | |
| 660 rrp->current++; | |
| 661 | |
| 662 if (rrp->current >= rrp->peers->number) { | |
| 663 rrp->current = 0; | |
| 664 } | |
| 665 | |
| 666 if (pc->tries) { | |
| 667 pc->tries--; | |
| 668 } | |
| 669 | |
| 670 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
| 671 } | |
| 672 | |
| 673 | |
| 674 #if (NGX_HTTP_SSL) | |
| 675 | |
|
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676 ngx_int_t |
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677 ngx_http_upstream_set_round_robin_peer_session(ngx_peer_connection_t *pc, |
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678 void *data) |
| 884 | 679 { |
| 680 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
| 681 | |
|
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682 ngx_int_t rc; |
| 884 | 683 ngx_ssl_session_t *ssl_session; |
| 684 ngx_http_upstream_rr_peer_t *peer; | |
| 685 | |
|
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686 peer = &rrp->peers->peer[rrp->current]; |
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687 |
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688 /* TODO: threads only mutex */ |
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689 /* ngx_lock_mutex(rrp->peers->mutex); */ |
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690 |
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691 ssl_session = peer->ssl_session; |
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692 |
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693 rc = ngx_ssl_set_session(pc->connection, ssl_session); |
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694 |
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695 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
| 1443 | 696 "set session: %p:%d", |
| 697 ssl_session, ssl_session ? ssl_session->references : 0); | |
|
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698 |
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699 /* ngx_unlock_mutex(rrp->peers->mutex); */ |
|
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700 |
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701 return rc; |
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702 } |
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703 |
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704 |
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705 void |
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706 ngx_http_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc, |
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707 void *data) |
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708 { |
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709 ngx_http_upstream_rr_peer_data_t *rrp = data; |
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710 |
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711 ngx_ssl_session_t *old_ssl_session, *ssl_session; |
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712 ngx_http_upstream_rr_peer_t *peer; |
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713 |
| 884 | 714 ssl_session = ngx_ssl_get_session(pc->connection); |
| 715 | |
| 716 if (ssl_session == NULL) { | |
| 717 return; | |
| 718 } | |
| 719 | |
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720 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
| 1443 | 721 "save session: %p:%d", ssl_session, ssl_session->references); |
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722 |
| 884 | 723 peer = &rrp->peers->peer[rrp->current]; |
| 724 | |
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725 /* TODO: threads only mutex */ |
| 884 | 726 /* ngx_lock_mutex(rrp->peers->mutex); */ |
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727 |
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728 old_ssl_session = peer->ssl_session; |
| 884 | 729 peer->ssl_session = ssl_session; |
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730 |
| 884 | 731 /* ngx_unlock_mutex(rrp->peers->mutex); */ |
| 732 | |
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733 if (old_ssl_session) { |
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734 |
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735 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
| 1443 | 736 "old session: %p:%d", |
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737 old_ssl_session, old_ssl_session->references); |
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738 |
| 884 | 739 /* TODO: may block */ |
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740 |
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741 ngx_ssl_free_session(old_ssl_session); |
| 884 | 742 } |
| 743 } | |
| 744 | |
| 745 #endif |