Mercurial > hg > nginx
annotate src/http/ngx_http_upstream_round_robin.c @ 2422:7af1e5fe102c
variable support for unix sockets in fastcgi_pass and proxy_pass
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Tue, 23 Dec 2008 19:35:12 +0000 |
| parents | 70a2bcc7e307 |
| children | ff127ba3b091 |
| 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 | |
|
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12 static ngx_int_t ngx_http_upstream_cmp_servers(const void *one, |
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13 const void *two); |
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14 static ngx_uint_t |
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15 ngx_http_upstream_get_peer(ngx_http_upstream_rr_peers_t *peers); |
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16 |
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17 |
| 884 | 18 ngx_int_t |
| 19 ngx_http_upstream_init_round_robin(ngx_conf_t *cf, | |
| 20 ngx_http_upstream_srv_conf_t *us) | |
| 21 { | |
| 22 ngx_url_t u; | |
| 23 ngx_uint_t i, j, n; | |
| 24 ngx_http_upstream_server_t *server; | |
| 1378 | 25 ngx_http_upstream_rr_peers_t *peers, *backup; |
| 884 | 26 |
| 27 us->peer.init = ngx_http_upstream_init_round_robin_peer; | |
| 28 | |
| 29 if (us->servers) { | |
| 30 server = us->servers->elts; | |
| 31 | |
| 1378 | 32 n = 0; |
| 33 | |
| 884 | 34 for (i = 0; i < us->servers->nelts; i++) { |
| 1378 | 35 if (server[i].backup) { |
| 36 continue; | |
| 37 } | |
| 38 | |
| 884 | 39 n += server[i].naddrs; |
| 40 } | |
| 41 | |
| 42 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
| 43 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
| 44 if (peers == NULL) { | |
| 45 return NGX_ERROR; | |
| 46 } | |
| 47 | |
| 1378 | 48 peers->single = (n == 1); |
| 884 | 49 peers->number = n; |
| 50 peers->name = &us->host; | |
| 51 | |
| 52 n = 0; | |
| 53 | |
| 54 for (i = 0; i < us->servers->nelts; i++) { | |
| 55 for (j = 0; j < server[i].naddrs; j++) { | |
| 1378 | 56 if (server[i].backup) { |
| 57 continue; | |
| 58 } | |
| 59 | |
| 884 | 60 peers->peer[n].sockaddr = server[i].addrs[j].sockaddr; |
| 61 peers->peer[n].socklen = server[i].addrs[j].socklen; | |
| 62 peers->peer[n].name = server[i].addrs[j].name; | |
| 63 peers->peer[n].max_fails = server[i].max_fails; | |
| 64 peers->peer[n].fail_timeout = server[i].fail_timeout; | |
| 65 peers->peer[n].down = server[i].down; | |
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66 peers->peer[n].weight = server[i].down ? 0 : server[i].weight; |
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67 peers->peer[n].current_weight = peers->peer[n].weight; |
| 884 | 68 n++; |
| 69 } | |
| 70 } | |
| 71 | |
| 72 us->peer.data = peers; | |
| 73 | |
| 1379 | 74 ngx_sort(&peers->peer[0], (size_t) n, |
| 75 sizeof(ngx_http_upstream_rr_peer_t), | |
| 76 ngx_http_upstream_cmp_servers); | |
| 77 | |
| 1378 | 78 /* backup servers */ |
| 79 | |
| 80 n = 0; | |
| 81 | |
| 82 for (i = 0; i < us->servers->nelts; i++) { | |
| 83 if (!server[i].backup) { | |
| 84 continue; | |
| 85 } | |
| 86 | |
| 87 n += server[i].naddrs; | |
| 88 } | |
| 89 | |
| 90 if (n == 0) { | |
| 91 return NGX_OK; | |
| 92 } | |
| 93 | |
| 94 backup = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
| 95 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
| 96 if (backup == NULL) { | |
| 97 return NGX_ERROR; | |
| 98 } | |
| 99 | |
| 100 peers->single = 0; | |
| 101 backup->single = 0; | |
| 102 backup->number = n; | |
| 103 backup->name = &us->host; | |
| 104 | |
| 105 n = 0; | |
| 106 | |
| 107 for (i = 0; i < us->servers->nelts; i++) { | |
| 108 for (j = 0; j < server[i].naddrs; j++) { | |
| 109 if (!server[i].backup) { | |
| 110 continue; | |
| 111 } | |
| 112 | |
| 113 backup->peer[n].sockaddr = server[i].addrs[j].sockaddr; | |
| 114 backup->peer[n].socklen = server[i].addrs[j].socklen; | |
| 115 backup->peer[n].name = server[i].addrs[j].name; | |
| 116 backup->peer[n].weight = server[i].weight; | |
| 117 backup->peer[n].current_weight = server[i].weight; | |
| 118 backup->peer[n].max_fails = server[i].max_fails; | |
| 119 backup->peer[n].fail_timeout = server[i].fail_timeout; | |
| 120 backup->peer[n].down = server[i].down; | |
| 121 n++; | |
| 122 } | |
| 123 } | |
| 124 | |
| 125 peers->next = backup; | |
| 126 | |
| 1379 | 127 ngx_sort(&backup->peer[0], (size_t) n, |
| 128 sizeof(ngx_http_upstream_rr_peer_t), | |
| 129 ngx_http_upstream_cmp_servers); | |
| 130 | |
| 884 | 131 return NGX_OK; |
| 132 } | |
| 133 | |
| 134 | |
| 135 /* an upstream implicitly defined by proxy_pass, etc. */ | |
| 136 | |
| 906 | 137 if (us->port == 0 && us->default_port == 0) { |
| 138 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, | |
| 139 "no port in upstream \"%V\" in %s:%ui", | |
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140 &us->host, us->file_name, us->line); |
| 906 | 141 return NGX_ERROR; |
| 142 } | |
| 143 | |
| 884 | 144 ngx_memzero(&u, sizeof(ngx_url_t)); |
| 145 | |
| 146 u.host = us->host; | |
| 916 | 147 u.port = (in_port_t) (us->port ? us->port : us->default_port); |
| 884 | 148 |
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149 if (ngx_inet_resolve_host(cf->pool, &u) != NGX_OK) { |
| 884 | 150 if (u.err) { |
| 151 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, | |
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152 "%s in upstream \"%V\" in %s:%ui", |
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153 u.err, &us->host, us->file_name, us->line); |
| 884 | 154 } |
| 155 | |
| 156 return NGX_ERROR; | |
| 157 } | |
| 158 | |
| 159 n = u.naddrs; | |
| 160 | |
| 161 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
| 162 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
| 163 if (peers == NULL) { | |
| 164 return NGX_ERROR; | |
| 165 } | |
| 166 | |
| 1378 | 167 peers->single = (n == 1); |
| 884 | 168 peers->number = n; |
| 169 peers->name = &us->host; | |
| 170 | |
| 171 for (i = 0; i < u.naddrs; i++) { | |
| 1564 | 172 peers->peer[i].sockaddr = u.addrs[i].sockaddr; |
| 173 peers->peer[i].socklen = u.addrs[i].socklen; | |
| 174 peers->peer[i].name = u.addrs[i].name; | |
| 175 peers->peer[i].weight = 1; | |
| 176 peers->peer[i].current_weight = 1; | |
| 177 peers->peer[i].max_fails = 1; | |
| 178 peers->peer[i].fail_timeout = 10; | |
| 884 | 179 } |
| 180 | |
| 181 us->peer.data = peers; | |
| 182 | |
| 1378 | 183 /* implicitly defined upstream has no backup servers */ |
| 184 | |
| 884 | 185 return NGX_OK; |
| 186 } | |
| 187 | |
| 188 | |
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189 static ngx_int_t |
| 1379 | 190 ngx_http_upstream_cmp_servers(const void *one, const void *two) |
| 191 { | |
| 192 ngx_http_upstream_rr_peer_t *first, *second; | |
| 193 | |
| 194 first = (ngx_http_upstream_rr_peer_t *) one; | |
| 195 second = (ngx_http_upstream_rr_peer_t *) two; | |
| 196 | |
| 197 return (first->weight < second->weight); | |
| 198 } | |
| 199 | |
| 200 | |
| 884 | 201 ngx_int_t |
| 202 ngx_http_upstream_init_round_robin_peer(ngx_http_request_t *r, | |
| 203 ngx_http_upstream_srv_conf_t *us) | |
| 204 { | |
| 205 ngx_uint_t n; | |
| 206 ngx_http_upstream_rr_peer_data_t *rrp; | |
| 207 | |
| 208 rrp = r->upstream->peer.data; | |
| 209 | |
| 210 if (rrp == NULL) { | |
| 211 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t)); | |
| 212 if (rrp == NULL) { | |
| 213 return NGX_ERROR; | |
| 214 } | |
| 215 | |
| 216 r->upstream->peer.data = rrp; | |
| 217 } | |
| 218 | |
| 219 rrp->peers = us->peer.data; | |
| 220 rrp->current = 0; | |
| 221 | |
| 222 if (rrp->peers->number <= 8 * sizeof(uintptr_t)) { | |
| 223 rrp->tried = &rrp->data; | |
| 224 rrp->data = 0; | |
| 225 | |
| 226 } else { | |
| 227 n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1)) | |
| 228 / (8 * sizeof(uintptr_t)); | |
| 229 | |
| 230 rrp->tried = ngx_pcalloc(r->pool, n * sizeof(uintptr_t)); | |
| 231 if (rrp->tried == NULL) { | |
| 232 return NGX_ERROR; | |
| 233 } | |
| 234 } | |
| 235 | |
| 236 r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer; | |
| 237 r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer; | |
| 238 r->upstream->peer.tries = rrp->peers->number; | |
| 239 #if (NGX_HTTP_SSL) | |
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240 r->upstream->peer.set_session = |
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241 ngx_http_upstream_set_round_robin_peer_session; |
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242 r->upstream->peer.save_session = |
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243 ngx_http_upstream_save_round_robin_peer_session; |
| 884 | 244 #endif |
| 245 | |
| 246 return NGX_OK; | |
| 247 } | |
| 248 | |
| 249 | |
| 250 ngx_int_t | |
| 1658 | 251 ngx_http_upstream_create_round_robin_peer(ngx_http_request_t *r, |
| 252 ngx_http_upstream_resolved_t *ur) | |
| 253 { | |
| 254 u_char *p; | |
| 255 size_t len; | |
| 256 ngx_uint_t i, n; | |
| 257 struct sockaddr_in *sin; | |
| 258 ngx_http_upstream_rr_peers_t *peers; | |
| 259 ngx_http_upstream_rr_peer_data_t *rrp; | |
| 260 | |
| 261 rrp = r->upstream->peer.data; | |
| 262 | |
| 263 if (rrp == NULL) { | |
| 264 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t)); | |
| 265 if (rrp == NULL) { | |
| 266 return NGX_ERROR; | |
| 267 } | |
| 268 | |
| 269 r->upstream->peer.data = rrp; | |
| 270 } | |
| 271 | |
| 272 peers = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
| 273 + sizeof(ngx_http_upstream_rr_peer_t) * (ur->naddrs - 1)); | |
| 274 if (peers == NULL) { | |
| 275 return NGX_ERROR; | |
| 276 } | |
| 277 | |
| 278 peers->single = (ur->naddrs == 1); | |
| 279 peers->number = ur->naddrs; | |
| 280 peers->name = &ur->host; | |
| 281 | |
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282 if (ur->sockaddr) { |
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283 peers->peer[0].sockaddr = ur->sockaddr; |
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284 peers->peer[0].socklen = ur->socklen; |
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285 peers->peer[0].name = ur->host; |
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286 peers->peer[0].weight = 1; |
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287 peers->peer[0].current_weight = 1; |
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288 peers->peer[0].max_fails = 1; |
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289 peers->peer[0].fail_timeout = 10; |
| 1658 | 290 |
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291 } else { |
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292 |
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293 for (i = 0; i < ur->naddrs; i++) { |
| 1658 | 294 |
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295 len = NGX_INET_ADDRSTRLEN + sizeof(":65536") - 1; |
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296 |
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297 p = ngx_pnalloc(r->pool, len); |
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298 if (p == NULL) { |
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299 return NGX_ERROR; |
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300 } |
| 1658 | 301 |
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302 len = ngx_inet_ntop(AF_INET, &ur->addrs[i], p, NGX_INET_ADDRSTRLEN); |
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303 len = ngx_sprintf(&p[len], ":%d", ur->port) - p; |
| 1658 | 304 |
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305 sin = ngx_pcalloc(r->pool, sizeof(struct sockaddr_in)); |
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306 if (sin == NULL) { |
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307 return NGX_ERROR; |
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308 } |
| 1658 | 309 |
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310 sin->sin_family = AF_INET; |
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311 sin->sin_port = htons(ur->port); |
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312 sin->sin_addr.s_addr = ur->addrs[i]; |
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313 |
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314 peers->peer[i].sockaddr = (struct sockaddr *) sin; |
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315 peers->peer[i].socklen = sizeof(struct sockaddr_in); |
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316 peers->peer[i].name.len = len; |
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317 peers->peer[i].name.data = p; |
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318 peers->peer[i].weight = 1; |
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319 peers->peer[i].current_weight = 1; |
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320 peers->peer[i].max_fails = 1; |
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321 peers->peer[i].fail_timeout = 10; |
|
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322 } |
| 1658 | 323 } |
| 324 | |
| 325 rrp->peers = peers; | |
| 326 rrp->current = 0; | |
| 327 | |
| 328 if (rrp->peers->number <= 8 * sizeof(uintptr_t)) { | |
| 329 rrp->tried = &rrp->data; | |
| 330 rrp->data = 0; | |
| 331 | |
| 332 } else { | |
| 333 n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1)) | |
| 334 / (8 * sizeof(uintptr_t)); | |
| 335 | |
| 336 rrp->tried = ngx_pcalloc(r->pool, n * sizeof(uintptr_t)); | |
| 337 if (rrp->tried == NULL) { | |
| 338 return NGX_ERROR; | |
| 339 } | |
| 340 } | |
| 341 | |
| 342 r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer; | |
| 343 r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer; | |
| 344 r->upstream->peer.tries = rrp->peers->number; | |
| 345 #if (NGX_HTTP_SSL) | |
| 346 r->upstream->peer.set_session = | |
| 347 ngx_http_upstream_set_round_robin_peer_session; | |
| 348 r->upstream->peer.save_session = | |
| 349 ngx_http_upstream_save_round_robin_peer_session; | |
| 350 #endif | |
| 351 | |
| 352 return NGX_OK; | |
| 353 } | |
| 354 | |
| 355 | |
| 356 ngx_int_t | |
| 884 | 357 ngx_http_upstream_get_round_robin_peer(ngx_peer_connection_t *pc, void *data) |
| 358 { | |
| 359 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
| 360 | |
| 1378 | 361 time_t now; |
| 362 uintptr_t m; | |
| 363 ngx_int_t rc; | |
| 364 ngx_uint_t i, n; | |
| 365 ngx_connection_t *c; | |
| 366 ngx_http_upstream_rr_peer_t *peer; | |
| 367 ngx_http_upstream_rr_peers_t *peers; | |
| 884 | 368 |
| 369 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
| 370 "get rr peer, try: %ui", pc->tries); | |
| 371 | |
| 372 now = ngx_time(); | |
| 373 | |
| 374 /* ngx_lock_mutex(rrp->peers->mutex); */ | |
| 375 | |
| 376 if (rrp->peers->last_cached) { | |
| 377 | |
| 378 /* cached connection */ | |
| 379 | |
| 380 c = rrp->peers->cached[rrp->peers->last_cached]; | |
| 381 rrp->peers->last_cached--; | |
| 382 | |
| 383 /* ngx_unlock_mutex(ppr->peers->mutex); */ | |
| 384 | |
| 385 #if (NGX_THREADS) | |
| 386 c->read->lock = c->read->own_lock; | |
| 387 c->write->lock = c->write->own_lock; | |
| 388 #endif | |
| 389 | |
| 390 pc->connection = c; | |
| 391 pc->cached = 1; | |
| 392 | |
| 393 return NGX_OK; | |
| 394 } | |
| 395 | |
| 396 pc->cached = 0; | |
| 397 pc->connection = NULL; | |
| 398 | |
| 1378 | 399 if (rrp->peers->single) { |
| 884 | 400 peer = &rrp->peers->peer[0]; |
| 401 | |
| 402 } else { | |
| 403 | |
| 404 /* there are several peers */ | |
| 405 | |
| 406 if (pc->tries == rrp->peers->number) { | |
| 407 | |
| 408 /* it's a first try - get a current peer */ | |
| 409 | |
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410 i = pc->tries; |
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411 |
| 884 | 412 for ( ;; ) { |
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413 rrp->current = ngx_http_upstream_get_peer(rrp->peers); |
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414 |
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415 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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416 "get rr peer, current: %ui %i", |
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417 rrp->current, |
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418 rrp->peers->peer[rrp->current].current_weight); |
| 884 | 419 |
| 420 n = rrp->current / (8 * sizeof(uintptr_t)); | |
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421 m = (uintptr_t) 1 << rrp->current % (8 * sizeof(uintptr_t)); |
| 884 | 422 |
| 423 if (!(rrp->tried[n] & m)) { | |
| 424 peer = &rrp->peers->peer[rrp->current]; | |
| 425 | |
| 426 if (!peer->down) { | |
| 427 | |
| 428 if (peer->max_fails == 0 | |
| 429 || peer->fails < peer->max_fails) | |
| 430 { | |
| 431 break; | |
| 432 } | |
| 433 | |
| 434 if (now - peer->accessed > peer->fail_timeout) { | |
| 435 peer->fails = 0; | |
| 436 break; | |
| 437 } | |
| 438 | |
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439 peer->current_weight = 0; |
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440 |
| 884 | 441 } else { |
| 442 rrp->tried[n] |= m; | |
| 443 } | |
| 444 | |
| 445 pc->tries--; | |
| 446 } | |
| 447 | |
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448 if (pc->tries == 0) { |
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449 goto failed; |
| 884 | 450 } |
| 451 | |
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452 if (--i == 0) { |
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453 ngx_log_error(NGX_LOG_ALERT, pc->log, 0, |
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454 "round robin upstream stuck on %ui tries", |
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455 pc->tries); |
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456 goto failed; |
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457 } |
| 884 | 458 } |
| 459 | |
| 460 peer->current_weight--; | |
| 461 | |
| 462 } else { | |
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463 |
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464 i = pc->tries; |
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465 |
| 884 | 466 for ( ;; ) { |
| 467 n = rrp->current / (8 * sizeof(uintptr_t)); | |
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468 m = (uintptr_t) 1 << rrp->current % (8 * sizeof(uintptr_t)); |
| 884 | 469 |
| 470 if (!(rrp->tried[n] & m)) { | |
| 471 | |
| 472 peer = &rrp->peers->peer[rrp->current]; | |
| 473 | |
| 474 if (!peer->down) { | |
| 475 | |
| 476 if (peer->max_fails == 0 | |
| 477 || peer->fails < peer->max_fails) | |
| 478 { | |
| 479 break; | |
| 480 } | |
| 481 | |
| 482 if (now - peer->accessed > peer->fail_timeout) { | |
| 483 peer->fails = 0; | |
| 484 break; | |
| 485 } | |
| 486 | |
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487 peer->current_weight = 0; |
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488 |
| 884 | 489 } else { |
| 490 rrp->tried[n] |= m; | |
| 491 } | |
| 492 | |
| 493 pc->tries--; | |
| 494 } | |
| 495 | |
| 496 rrp->current++; | |
| 497 | |
| 498 if (rrp->current >= rrp->peers->number) { | |
| 499 rrp->current = 0; | |
| 500 } | |
| 501 | |
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502 if (pc->tries == 0) { |
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503 goto failed; |
| 884 | 504 } |
| 505 | |
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506 if (--i == 0) { |
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507 ngx_log_error(NGX_LOG_ALERT, pc->log, 0, |
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508 "round robin upstream stuck on %ui tries", |
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509 pc->tries); |
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510 goto failed; |
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|
511 } |
| 884 | 512 } |
| 513 | |
| 514 peer->current_weight--; | |
| 515 } | |
| 516 | |
| 517 rrp->tried[n] |= m; | |
| 518 } | |
| 519 | |
| 520 pc->sockaddr = peer->sockaddr; | |
| 521 pc->socklen = peer->socklen; | |
| 522 pc->name = &peer->name; | |
| 523 | |
| 524 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
| 525 | |
| 1378 | 526 if (pc->tries == 1 && rrp->peers->next) { |
| 527 pc->tries += rrp->peers->next->number; | |
| 528 | |
| 529 n = rrp->peers->next->number / (8 * sizeof(uintptr_t)) + 1; | |
| 1389 | 530 for (i = 0; i < n; i++) { |
| 1378 | 531 rrp->tried[i] = 0; |
| 532 } | |
| 533 } | |
| 534 | |
| 884 | 535 return NGX_OK; |
| 536 | |
| 537 failed: | |
| 538 | |
| 1378 | 539 peers = rrp->peers; |
| 540 | |
| 541 if (peers->next) { | |
| 542 | |
| 543 /* ngx_unlock_mutex(peers->mutex); */ | |
| 544 | |
| 545 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, pc->log, 0, "backup servers"); | |
| 546 | |
| 547 rrp->peers = peers->next; | |
| 548 pc->tries = rrp->peers->number; | |
| 549 | |
| 550 n = rrp->peers->number / (8 * sizeof(uintptr_t)) + 1; | |
| 1389 | 551 for (i = 0; i < n; i++) { |
| 1378 | 552 rrp->tried[i] = 0; |
| 553 } | |
| 554 | |
| 555 rc = ngx_http_upstream_get_round_robin_peer(pc, rrp); | |
| 556 | |
| 557 if (rc != NGX_BUSY) { | |
| 558 return rc; | |
| 559 } | |
| 560 | |
| 561 /* ngx_lock_mutex(peers->mutex); */ | |
| 562 } | |
| 563 | |
| 884 | 564 /* all peers failed, mark them as live for quick recovery */ |
| 565 | |
| 1378 | 566 for (i = 0; i < peers->number; i++) { |
| 567 peers->peer[i].fails = 0; | |
| 884 | 568 } |
| 569 | |
| 1378 | 570 /* ngx_unlock_mutex(peers->mutex); */ |
| 884 | 571 |
| 1378 | 572 pc->name = peers->name; |
| 884 | 573 |
| 574 return NGX_BUSY; | |
| 575 } | |
| 576 | |
| 577 | |
|
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578 static ngx_uint_t |
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579 ngx_http_upstream_get_peer(ngx_http_upstream_rr_peers_t *peers) |
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580 { |
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581 ngx_uint_t i, n; |
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|
582 ngx_http_upstream_rr_peer_t *peer; |
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583 |
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584 peer = &peers->peer[0]; |
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585 |
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586 for ( ;; ) { |
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587 |
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588 for (i = 0; i < peers->number; i++) { |
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589 |
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590 if (peer[i].current_weight <= 0) { |
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|
591 continue; |
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592 } |
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|
593 |
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|
594 n = i; |
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595 |
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596 while (i < peers->number - 1) { |
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597 |
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598 i++; |
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599 |
|
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|
600 if (peer[i].current_weight <= 0) { |
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|
601 continue; |
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602 } |
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603 |
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|
604 if (peer[n].current_weight * 1000 / peer[i].current_weight |
|
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605 > peer[n].weight * 1000 / peer[i].weight) |
|
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|
606 { |
|
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|
607 return n; |
|
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|
608 } |
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|
609 |
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610 n = i; |
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611 } |
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612 |
|
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613 if (peer[i].current_weight > 0) { |
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614 n = i; |
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615 } |
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616 |
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617 return n; |
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618 } |
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619 |
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620 for (i = 0; i < peers->number; i++) { |
|
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621 peer[i].current_weight = peer[i].weight; |
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622 } |
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623 } |
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624 } |
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625 |
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626 |
| 884 | 627 void |
| 628 ngx_http_upstream_free_round_robin_peer(ngx_peer_connection_t *pc, void *data, | |
| 629 ngx_uint_t state) | |
| 630 { | |
| 631 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
| 632 | |
| 633 time_t now; | |
| 634 ngx_http_upstream_rr_peer_t *peer; | |
| 635 | |
| 636 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
| 637 "free rr peer %ui %ui", pc->tries, state); | |
| 638 | |
| 639 if (state == 0 && pc->tries == 0) { | |
| 640 return; | |
| 641 } | |
| 642 | |
| 643 /* TODO: NGX_PEER_KEEPALIVE */ | |
| 644 | |
| 1378 | 645 if (rrp->peers->single) { |
| 884 | 646 pc->tries = 0; |
| 647 return; | |
| 648 } | |
| 649 | |
| 650 if (state & NGX_PEER_FAILED) { | |
| 651 now = ngx_time(); | |
| 652 | |
| 653 peer = &rrp->peers->peer[rrp->current]; | |
| 654 | |
| 655 /* ngx_lock_mutex(rrp->peers->mutex); */ | |
| 656 | |
| 657 peer->fails++; | |
| 658 peer->accessed = now; | |
| 659 | |
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660 if (peer->max_fails) { |
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661 peer->current_weight -= peer->weight / peer->max_fails; |
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662 } |
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663 |
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664 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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665 "free rr peer failed: %ui %i", |
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666 rrp->current, peer->current_weight); |
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667 |
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668 if (peer->current_weight < 0) { |
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669 peer->current_weight = 0; |
| 884 | 670 } |
| 671 | |
| 672 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
| 673 } | |
| 674 | |
| 675 rrp->current++; | |
| 676 | |
| 677 if (rrp->current >= rrp->peers->number) { | |
| 678 rrp->current = 0; | |
| 679 } | |
| 680 | |
| 681 if (pc->tries) { | |
| 682 pc->tries--; | |
| 683 } | |
| 684 | |
| 685 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
| 686 } | |
| 687 | |
| 688 | |
| 689 #if (NGX_HTTP_SSL) | |
| 690 | |
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691 ngx_int_t |
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692 ngx_http_upstream_set_round_robin_peer_session(ngx_peer_connection_t *pc, |
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693 void *data) |
| 884 | 694 { |
| 695 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
| 696 | |
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697 ngx_int_t rc; |
| 884 | 698 ngx_ssl_session_t *ssl_session; |
| 699 ngx_http_upstream_rr_peer_t *peer; | |
| 700 | |
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701 peer = &rrp->peers->peer[rrp->current]; |
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702 |
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703 /* TODO: threads only mutex */ |
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704 /* ngx_lock_mutex(rrp->peers->mutex); */ |
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705 |
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706 ssl_session = peer->ssl_session; |
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707 |
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708 rc = ngx_ssl_set_session(pc->connection, ssl_session); |
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709 |
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710 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
| 1443 | 711 "set session: %p:%d", |
| 712 ssl_session, ssl_session ? ssl_session->references : 0); | |
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713 |
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714 /* ngx_unlock_mutex(rrp->peers->mutex); */ |
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715 |
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716 return rc; |
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717 } |
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718 |
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719 |
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720 void |
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721 ngx_http_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc, |
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722 void *data) |
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723 { |
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724 ngx_http_upstream_rr_peer_data_t *rrp = data; |
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725 |
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726 ngx_ssl_session_t *old_ssl_session, *ssl_session; |
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727 ngx_http_upstream_rr_peer_t *peer; |
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728 |
| 884 | 729 ssl_session = ngx_ssl_get_session(pc->connection); |
| 730 | |
| 731 if (ssl_session == NULL) { | |
| 732 return; | |
| 733 } | |
| 734 | |
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735 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
| 1443 | 736 "save session: %p:%d", ssl_session, ssl_session->references); |
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737 |
| 884 | 738 peer = &rrp->peers->peer[rrp->current]; |
| 739 | |
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740 /* TODO: threads only mutex */ |
| 884 | 741 /* ngx_lock_mutex(rrp->peers->mutex); */ |
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742 |
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743 old_ssl_session = peer->ssl_session; |
| 884 | 744 peer->ssl_session = ssl_session; |
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745 |
| 884 | 746 /* ngx_unlock_mutex(rrp->peers->mutex); */ |
| 747 | |
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748 if (old_ssl_session) { |
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749 |
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750 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
| 1443 | 751 "old session: %p:%d", |
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752 old_ssl_session, old_ssl_session->references); |
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753 |
| 884 | 754 /* TODO: may block */ |
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755 |
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756 ngx_ssl_free_session(old_ssl_session); |
| 884 | 757 } |
| 758 } | |
| 759 | |
| 760 #endif |