Mercurial > hg > nginx
annotate src/stream/ngx_stream_upstream_round_robin.c @ 7682:2ab0ecfe5a5f
release-1.19.1 tag
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Tue, 07 Jul 2020 18:56:06 +0300 |
| parents | b99cbafd51da |
| children | 90cc7194e993 |
| rev | line source |
|---|---|
| 6115 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4 * Copyright (C) Nginx, Inc. | |
| 5 */ | |
| 6 | |
| 7 | |
| 8 #include <ngx_config.h> | |
| 9 #include <ngx_core.h> | |
| 10 #include <ngx_stream.h> | |
| 11 | |
| 12 | |
| 13 #define ngx_stream_upstream_tries(p) ((p)->number \ | |
| 14 + ((p)->next ? (p)->next->number : 0)) | |
| 15 | |
| 16 | |
| 17 static ngx_stream_upstream_rr_peer_t *ngx_stream_upstream_get_peer( | |
| 18 ngx_stream_upstream_rr_peer_data_t *rrp); | |
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19 static void ngx_stream_upstream_notify_round_robin_peer( |
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20 ngx_peer_connection_t *pc, void *data, ngx_uint_t state); |
| 6115 | 21 |
| 22 #if (NGX_STREAM_SSL) | |
| 23 | |
| 24 static ngx_int_t ngx_stream_upstream_set_round_robin_peer_session( | |
| 25 ngx_peer_connection_t *pc, void *data); | |
| 26 static void ngx_stream_upstream_save_round_robin_peer_session( | |
| 27 ngx_peer_connection_t *pc, void *data); | |
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28 static ngx_int_t ngx_stream_upstream_empty_set_session( |
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29 ngx_peer_connection_t *pc, void *data); |
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30 static void ngx_stream_upstream_empty_save_session(ngx_peer_connection_t *pc, |
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31 void *data); |
| 6115 | 32 |
| 33 #endif | |
| 34 | |
| 35 | |
| 36 ngx_int_t | |
| 37 ngx_stream_upstream_init_round_robin(ngx_conf_t *cf, | |
| 38 ngx_stream_upstream_srv_conf_t *us) | |
| 39 { | |
| 40 ngx_url_t u; | |
| 41 ngx_uint_t i, j, n, w; | |
| 42 ngx_stream_upstream_server_t *server; | |
| 43 ngx_stream_upstream_rr_peer_t *peer, **peerp; | |
| 44 ngx_stream_upstream_rr_peers_t *peers, *backup; | |
| 45 | |
| 46 us->peer.init = ngx_stream_upstream_init_round_robin_peer; | |
| 47 | |
| 48 if (us->servers) { | |
| 49 server = us->servers->elts; | |
| 50 | |
| 51 n = 0; | |
| 52 w = 0; | |
| 53 | |
| 54 for (i = 0; i < us->servers->nelts; i++) { | |
| 55 if (server[i].backup) { | |
| 56 continue; | |
| 57 } | |
| 58 | |
| 59 n += server[i].naddrs; | |
| 60 w += server[i].naddrs * server[i].weight; | |
| 61 } | |
| 62 | |
| 63 if (n == 0) { | |
| 64 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, | |
| 65 "no servers in upstream \"%V\" in %s:%ui", | |
| 66 &us->host, us->file_name, us->line); | |
| 67 return NGX_ERROR; | |
| 68 } | |
| 69 | |
| 70 peers = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_rr_peers_t)); | |
| 71 if (peers == NULL) { | |
| 72 return NGX_ERROR; | |
| 73 } | |
| 74 | |
| 75 peer = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_rr_peer_t) * n); | |
| 76 if (peer == NULL) { | |
| 77 return NGX_ERROR; | |
| 78 } | |
| 79 | |
| 80 peers->single = (n == 1); | |
| 81 peers->number = n; | |
| 82 peers->weighted = (w != n); | |
| 83 peers->total_weight = w; | |
| 84 peers->name = &us->host; | |
| 85 | |
| 86 n = 0; | |
| 87 peerp = &peers->peer; | |
| 88 | |
| 89 for (i = 0; i < us->servers->nelts; i++) { | |
| 90 if (server[i].backup) { | |
| 91 continue; | |
| 92 } | |
| 93 | |
| 94 for (j = 0; j < server[i].naddrs; j++) { | |
| 95 peer[n].sockaddr = server[i].addrs[j].sockaddr; | |
| 96 peer[n].socklen = server[i].addrs[j].socklen; | |
| 97 peer[n].name = server[i].addrs[j].name; | |
| 98 peer[n].weight = server[i].weight; | |
| 99 peer[n].effective_weight = server[i].weight; | |
| 100 peer[n].current_weight = 0; | |
| 6705 | 101 peer[n].max_conns = server[i].max_conns; |
| 6115 | 102 peer[n].max_fails = server[i].max_fails; |
| 103 peer[n].fail_timeout = server[i].fail_timeout; | |
| 104 peer[n].down = server[i].down; | |
| 105 peer[n].server = server[i].name; | |
| 106 | |
| 107 *peerp = &peer[n]; | |
| 108 peerp = &peer[n].next; | |
| 109 n++; | |
| 110 } | |
| 111 } | |
| 112 | |
| 113 us->peer.data = peers; | |
| 114 | |
| 115 /* backup servers */ | |
| 116 | |
| 117 n = 0; | |
| 118 w = 0; | |
| 119 | |
| 120 for (i = 0; i < us->servers->nelts; i++) { | |
| 121 if (!server[i].backup) { | |
| 122 continue; | |
| 123 } | |
| 124 | |
| 125 n += server[i].naddrs; | |
| 126 w += server[i].naddrs * server[i].weight; | |
| 127 } | |
| 128 | |
| 129 if (n == 0) { | |
| 130 return NGX_OK; | |
| 131 } | |
| 132 | |
| 133 backup = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_rr_peers_t)); | |
| 134 if (backup == NULL) { | |
| 135 return NGX_ERROR; | |
| 136 } | |
| 137 | |
| 138 peer = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_rr_peer_t) * n); | |
| 139 if (peer == NULL) { | |
| 140 return NGX_ERROR; | |
| 141 } | |
| 142 | |
| 143 peers->single = 0; | |
| 144 backup->single = 0; | |
| 145 backup->number = n; | |
| 146 backup->weighted = (w != n); | |
| 147 backup->total_weight = w; | |
| 148 backup->name = &us->host; | |
| 149 | |
| 150 n = 0; | |
| 151 peerp = &backup->peer; | |
| 152 | |
| 153 for (i = 0; i < us->servers->nelts; i++) { | |
| 154 if (!server[i].backup) { | |
| 155 continue; | |
| 156 } | |
| 157 | |
| 158 for (j = 0; j < server[i].naddrs; j++) { | |
| 159 peer[n].sockaddr = server[i].addrs[j].sockaddr; | |
| 160 peer[n].socklen = server[i].addrs[j].socklen; | |
| 161 peer[n].name = server[i].addrs[j].name; | |
| 162 peer[n].weight = server[i].weight; | |
| 163 peer[n].effective_weight = server[i].weight; | |
| 164 peer[n].current_weight = 0; | |
| 6705 | 165 peer[n].max_conns = server[i].max_conns; |
| 6115 | 166 peer[n].max_fails = server[i].max_fails; |
| 167 peer[n].fail_timeout = server[i].fail_timeout; | |
| 168 peer[n].down = server[i].down; | |
| 169 peer[n].server = server[i].name; | |
| 170 | |
| 171 *peerp = &peer[n]; | |
| 172 peerp = &peer[n].next; | |
| 173 n++; | |
| 174 } | |
| 175 } | |
| 176 | |
| 177 peers->next = backup; | |
| 178 | |
| 179 return NGX_OK; | |
| 180 } | |
| 181 | |
| 182 | |
| 183 /* an upstream implicitly defined by proxy_pass, etc. */ | |
| 184 | |
| 185 if (us->port == 0) { | |
| 186 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, | |
| 187 "no port in upstream \"%V\" in %s:%ui", | |
| 188 &us->host, us->file_name, us->line); | |
| 189 return NGX_ERROR; | |
| 190 } | |
| 191 | |
| 192 ngx_memzero(&u, sizeof(ngx_url_t)); | |
| 193 | |
| 194 u.host = us->host; | |
| 195 u.port = us->port; | |
| 196 | |
| 197 if (ngx_inet_resolve_host(cf->pool, &u) != NGX_OK) { | |
| 198 if (u.err) { | |
| 199 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, | |
| 200 "%s in upstream \"%V\" in %s:%ui", | |
| 201 u.err, &us->host, us->file_name, us->line); | |
| 202 } | |
| 203 | |
| 204 return NGX_ERROR; | |
| 205 } | |
| 206 | |
| 207 n = u.naddrs; | |
| 208 | |
| 209 peers = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_rr_peers_t)); | |
| 210 if (peers == NULL) { | |
| 211 return NGX_ERROR; | |
| 212 } | |
| 213 | |
| 214 peer = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_rr_peer_t) * n); | |
| 215 if (peer == NULL) { | |
| 216 return NGX_ERROR; | |
| 217 } | |
| 218 | |
| 219 peers->single = (n == 1); | |
| 220 peers->number = n; | |
| 221 peers->weighted = 0; | |
| 222 peers->total_weight = n; | |
| 223 peers->name = &us->host; | |
| 224 | |
| 225 peerp = &peers->peer; | |
| 226 | |
| 227 for (i = 0; i < u.naddrs; i++) { | |
| 228 peer[i].sockaddr = u.addrs[i].sockaddr; | |
| 229 peer[i].socklen = u.addrs[i].socklen; | |
| 230 peer[i].name = u.addrs[i].name; | |
| 231 peer[i].weight = 1; | |
| 232 peer[i].effective_weight = 1; | |
| 233 peer[i].current_weight = 0; | |
| 6705 | 234 peer[i].max_conns = 0; |
| 6115 | 235 peer[i].max_fails = 1; |
| 236 peer[i].fail_timeout = 10; | |
| 237 *peerp = &peer[i]; | |
| 238 peerp = &peer[i].next; | |
| 239 } | |
| 240 | |
| 241 us->peer.data = peers; | |
| 242 | |
| 243 /* implicitly defined upstream has no backup servers */ | |
| 244 | |
| 245 return NGX_OK; | |
| 246 } | |
| 247 | |
| 248 | |
| 249 ngx_int_t | |
| 250 ngx_stream_upstream_init_round_robin_peer(ngx_stream_session_t *s, | |
| 251 ngx_stream_upstream_srv_conf_t *us) | |
| 252 { | |
| 253 ngx_uint_t n; | |
| 254 ngx_stream_upstream_rr_peer_data_t *rrp; | |
| 255 | |
| 256 rrp = s->upstream->peer.data; | |
| 257 | |
| 258 if (rrp == NULL) { | |
| 259 rrp = ngx_palloc(s->connection->pool, | |
| 260 sizeof(ngx_stream_upstream_rr_peer_data_t)); | |
| 261 if (rrp == NULL) { | |
| 262 return NGX_ERROR; | |
| 263 } | |
| 264 | |
| 265 s->upstream->peer.data = rrp; | |
| 266 } | |
| 267 | |
| 268 rrp->peers = us->peer.data; | |
| 269 rrp->current = NULL; | |
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270 rrp->config = 0; |
| 6115 | 271 |
| 272 n = rrp->peers->number; | |
| 273 | |
| 274 if (rrp->peers->next && rrp->peers->next->number > n) { | |
| 275 n = rrp->peers->next->number; | |
| 276 } | |
| 277 | |
| 278 if (n <= 8 * sizeof(uintptr_t)) { | |
| 279 rrp->tried = &rrp->data; | |
| 280 rrp->data = 0; | |
| 281 | |
| 282 } else { | |
| 283 n = (n + (8 * sizeof(uintptr_t) - 1)) / (8 * sizeof(uintptr_t)); | |
| 284 | |
| 285 rrp->tried = ngx_pcalloc(s->connection->pool, n * sizeof(uintptr_t)); | |
| 286 if (rrp->tried == NULL) { | |
| 287 return NGX_ERROR; | |
| 288 } | |
| 289 } | |
| 290 | |
| 291 s->upstream->peer.get = ngx_stream_upstream_get_round_robin_peer; | |
| 292 s->upstream->peer.free = ngx_stream_upstream_free_round_robin_peer; | |
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293 s->upstream->peer.notify = ngx_stream_upstream_notify_round_robin_peer; |
| 6115 | 294 s->upstream->peer.tries = ngx_stream_upstream_tries(rrp->peers); |
| 295 #if (NGX_STREAM_SSL) | |
| 296 s->upstream->peer.set_session = | |
| 297 ngx_stream_upstream_set_round_robin_peer_session; | |
| 298 s->upstream->peer.save_session = | |
| 299 ngx_stream_upstream_save_round_robin_peer_session; | |
| 300 #endif | |
| 301 | |
| 302 return NGX_OK; | |
| 303 } | |
| 304 | |
| 305 | |
| 306 ngx_int_t | |
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307 ngx_stream_upstream_create_round_robin_peer(ngx_stream_session_t *s, |
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308 ngx_stream_upstream_resolved_t *ur) |
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309 { |
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310 u_char *p; |
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311 size_t len; |
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312 socklen_t socklen; |
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313 ngx_uint_t i, n; |
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314 struct sockaddr *sockaddr; |
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315 ngx_stream_upstream_rr_peer_t *peer, **peerp; |
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316 ngx_stream_upstream_rr_peers_t *peers; |
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317 ngx_stream_upstream_rr_peer_data_t *rrp; |
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318 |
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319 rrp = s->upstream->peer.data; |
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320 |
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321 if (rrp == NULL) { |
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322 rrp = ngx_palloc(s->connection->pool, |
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323 sizeof(ngx_stream_upstream_rr_peer_data_t)); |
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324 if (rrp == NULL) { |
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325 return NGX_ERROR; |
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326 } |
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327 |
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328 s->upstream->peer.data = rrp; |
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329 } |
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330 |
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331 peers = ngx_pcalloc(s->connection->pool, |
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332 sizeof(ngx_stream_upstream_rr_peers_t)); |
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333 if (peers == NULL) { |
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334 return NGX_ERROR; |
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335 } |
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336 |
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337 peer = ngx_pcalloc(s->connection->pool, |
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338 sizeof(ngx_stream_upstream_rr_peer_t) * ur->naddrs); |
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339 if (peer == NULL) { |
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340 return NGX_ERROR; |
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341 } |
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342 |
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343 peers->single = (ur->naddrs == 1); |
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344 peers->number = ur->naddrs; |
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345 peers->name = &ur->host; |
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346 |
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347 if (ur->sockaddr) { |
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348 peer[0].sockaddr = ur->sockaddr; |
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349 peer[0].socklen = ur->socklen; |
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350 peer[0].name = ur->name; |
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351 peer[0].weight = 1; |
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352 peer[0].effective_weight = 1; |
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353 peer[0].current_weight = 0; |
| 6706 | 354 peer[0].max_conns = 0; |
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355 peer[0].max_fails = 1; |
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356 peer[0].fail_timeout = 10; |
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357 peers->peer = peer; |
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358 |
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359 } else { |
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360 peerp = &peers->peer; |
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361 |
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362 for (i = 0; i < ur->naddrs; i++) { |
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363 |
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364 socklen = ur->addrs[i].socklen; |
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365 |
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366 sockaddr = ngx_palloc(s->connection->pool, socklen); |
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367 if (sockaddr == NULL) { |
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368 return NGX_ERROR; |
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369 } |
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370 |
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371 ngx_memcpy(sockaddr, ur->addrs[i].sockaddr, socklen); |
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372 ngx_inet_set_port(sockaddr, ur->port); |
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373 |
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374 p = ngx_pnalloc(s->connection->pool, NGX_SOCKADDR_STRLEN); |
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375 if (p == NULL) { |
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376 return NGX_ERROR; |
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377 } |
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378 |
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379 len = ngx_sock_ntop(sockaddr, socklen, p, NGX_SOCKADDR_STRLEN, 1); |
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380 |
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381 peer[i].sockaddr = sockaddr; |
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382 peer[i].socklen = socklen; |
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383 peer[i].name.len = len; |
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384 peer[i].name.data = p; |
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385 peer[i].weight = 1; |
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386 peer[i].effective_weight = 1; |
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387 peer[i].current_weight = 0; |
| 6706 | 388 peer[i].max_conns = 0; |
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389 peer[i].max_fails = 1; |
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390 peer[i].fail_timeout = 10; |
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391 *peerp = &peer[i]; |
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392 peerp = &peer[i].next; |
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393 } |
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394 } |
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395 |
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396 rrp->peers = peers; |
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397 rrp->current = NULL; |
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398 rrp->config = 0; |
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399 |
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400 if (rrp->peers->number <= 8 * sizeof(uintptr_t)) { |
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401 rrp->tried = &rrp->data; |
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402 rrp->data = 0; |
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403 |
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404 } else { |
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405 n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1)) |
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406 / (8 * sizeof(uintptr_t)); |
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407 |
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408 rrp->tried = ngx_pcalloc(s->connection->pool, n * sizeof(uintptr_t)); |
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409 if (rrp->tried == NULL) { |
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410 return NGX_ERROR; |
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411 } |
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412 } |
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413 |
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414 s->upstream->peer.get = ngx_stream_upstream_get_round_robin_peer; |
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415 s->upstream->peer.free = ngx_stream_upstream_free_round_robin_peer; |
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416 s->upstream->peer.tries = ngx_stream_upstream_tries(rrp->peers); |
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417 #if (NGX_STREAM_SSL) |
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418 s->upstream->peer.set_session = ngx_stream_upstream_empty_set_session; |
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419 s->upstream->peer.save_session = ngx_stream_upstream_empty_save_session; |
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420 #endif |
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421 |
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422 return NGX_OK; |
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423 } |
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424 |
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425 |
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426 ngx_int_t |
| 6115 | 427 ngx_stream_upstream_get_round_robin_peer(ngx_peer_connection_t *pc, void *data) |
| 428 { | |
| 429 ngx_stream_upstream_rr_peer_data_t *rrp = data; | |
| 430 | |
| 431 ngx_int_t rc; | |
| 432 ngx_uint_t i, n; | |
| 433 ngx_stream_upstream_rr_peer_t *peer; | |
| 434 ngx_stream_upstream_rr_peers_t *peers; | |
| 435 | |
| 436 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, pc->log, 0, | |
| 437 "get rr peer, try: %ui", pc->tries); | |
| 438 | |
| 439 pc->connection = NULL; | |
| 440 | |
| 441 peers = rrp->peers; | |
| 442 ngx_stream_upstream_rr_peers_wlock(peers); | |
| 443 | |
| 444 if (peers->single) { | |
| 445 peer = peers->peer; | |
| 446 | |
| 447 if (peer->down) { | |
| 448 goto failed; | |
| 449 } | |
| 450 | |
| 6705 | 451 if (peer->max_conns && peer->conns >= peer->max_conns) { |
| 452 goto failed; | |
| 453 } | |
| 454 | |
| 6115 | 455 rrp->current = peer; |
| 456 | |
| 457 } else { | |
| 458 | |
| 459 /* there are several peers */ | |
| 460 | |
| 461 peer = ngx_stream_upstream_get_peer(rrp); | |
| 462 | |
| 463 if (peer == NULL) { | |
| 464 goto failed; | |
| 465 } | |
| 466 | |
| 467 ngx_log_debug2(NGX_LOG_DEBUG_STREAM, pc->log, 0, | |
| 468 "get rr peer, current: %p %i", | |
| 469 peer, peer->current_weight); | |
| 470 } | |
| 471 | |
| 472 pc->sockaddr = peer->sockaddr; | |
| 473 pc->socklen = peer->socklen; | |
| 474 pc->name = &peer->name; | |
| 475 | |
| 476 peer->conns++; | |
| 477 | |
| 478 ngx_stream_upstream_rr_peers_unlock(peers); | |
| 479 | |
| 480 return NGX_OK; | |
| 481 | |
| 482 failed: | |
| 483 | |
| 484 if (peers->next) { | |
| 485 | |
| 486 ngx_log_debug0(NGX_LOG_DEBUG_STREAM, pc->log, 0, "backup servers"); | |
| 487 | |
| 488 rrp->peers = peers->next; | |
| 489 | |
| 490 n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1)) | |
| 491 / (8 * sizeof(uintptr_t)); | |
| 492 | |
| 493 for (i = 0; i < n; i++) { | |
| 6474 | 494 rrp->tried[i] = 0; |
| 6115 | 495 } |
| 496 | |
| 497 ngx_stream_upstream_rr_peers_unlock(peers); | |
| 498 | |
| 499 rc = ngx_stream_upstream_get_round_robin_peer(pc, rrp); | |
| 500 | |
| 501 if (rc != NGX_BUSY) { | |
| 502 return rc; | |
| 503 } | |
| 504 | |
| 505 ngx_stream_upstream_rr_peers_wlock(peers); | |
| 506 } | |
| 507 | |
| 508 ngx_stream_upstream_rr_peers_unlock(peers); | |
| 509 | |
| 510 pc->name = peers->name; | |
| 511 | |
| 512 return NGX_BUSY; | |
| 513 } | |
| 514 | |
| 515 | |
| 516 static ngx_stream_upstream_rr_peer_t * | |
| 517 ngx_stream_upstream_get_peer(ngx_stream_upstream_rr_peer_data_t *rrp) | |
| 518 { | |
| 519 time_t now; | |
| 520 uintptr_t m; | |
| 521 ngx_int_t total; | |
| 522 ngx_uint_t i, n, p; | |
| 523 ngx_stream_upstream_rr_peer_t *peer, *best; | |
| 524 | |
| 525 now = ngx_time(); | |
| 526 | |
| 527 best = NULL; | |
| 528 total = 0; | |
| 529 | |
| 530 #if (NGX_SUPPRESS_WARN) | |
| 531 p = 0; | |
| 532 #endif | |
| 533 | |
| 534 for (peer = rrp->peers->peer, i = 0; | |
| 535 peer; | |
| 536 peer = peer->next, i++) | |
| 537 { | |
| 538 n = i / (8 * sizeof(uintptr_t)); | |
| 539 m = (uintptr_t) 1 << i % (8 * sizeof(uintptr_t)); | |
| 540 | |
| 541 if (rrp->tried[n] & m) { | |
| 542 continue; | |
| 543 } | |
| 544 | |
| 545 if (peer->down) { | |
| 546 continue; | |
| 547 } | |
| 548 | |
| 549 if (peer->max_fails | |
| 550 && peer->fails >= peer->max_fails | |
| 551 && now - peer->checked <= peer->fail_timeout) | |
| 552 { | |
| 553 continue; | |
| 554 } | |
| 555 | |
| 6705 | 556 if (peer->max_conns && peer->conns >= peer->max_conns) { |
| 557 continue; | |
| 558 } | |
| 559 | |
| 6115 | 560 peer->current_weight += peer->effective_weight; |
| 561 total += peer->effective_weight; | |
| 562 | |
| 563 if (peer->effective_weight < peer->weight) { | |
| 564 peer->effective_weight++; | |
| 565 } | |
| 566 | |
| 567 if (best == NULL || peer->current_weight > best->current_weight) { | |
| 568 best = peer; | |
| 569 p = i; | |
| 570 } | |
| 571 } | |
| 572 | |
| 573 if (best == NULL) { | |
| 574 return NULL; | |
| 575 } | |
| 576 | |
| 577 rrp->current = best; | |
| 578 | |
| 579 n = p / (8 * sizeof(uintptr_t)); | |
| 580 m = (uintptr_t) 1 << p % (8 * sizeof(uintptr_t)); | |
| 581 | |
| 582 rrp->tried[n] |= m; | |
| 583 | |
| 584 best->current_weight -= total; | |
| 585 | |
| 586 if (now - best->checked > best->fail_timeout) { | |
| 587 best->checked = now; | |
| 588 } | |
| 589 | |
| 590 return best; | |
| 591 } | |
| 592 | |
| 593 | |
| 594 void | |
| 595 ngx_stream_upstream_free_round_robin_peer(ngx_peer_connection_t *pc, void *data, | |
| 596 ngx_uint_t state) | |
| 597 { | |
| 598 ngx_stream_upstream_rr_peer_data_t *rrp = data; | |
| 599 | |
| 600 time_t now; | |
| 601 ngx_stream_upstream_rr_peer_t *peer; | |
| 602 | |
| 603 ngx_log_debug2(NGX_LOG_DEBUG_STREAM, pc->log, 0, | |
| 604 "free rr peer %ui %ui", pc->tries, state); | |
| 605 | |
| 606 peer = rrp->current; | |
| 607 | |
| 608 ngx_stream_upstream_rr_peers_rlock(rrp->peers); | |
| 609 ngx_stream_upstream_rr_peer_lock(rrp->peers, peer); | |
| 610 | |
| 611 if (rrp->peers->single) { | |
| 612 peer->conns--; | |
| 613 | |
| 614 ngx_stream_upstream_rr_peer_unlock(rrp->peers, peer); | |
| 615 ngx_stream_upstream_rr_peers_unlock(rrp->peers); | |
| 616 | |
| 617 pc->tries = 0; | |
| 618 return; | |
| 619 } | |
| 620 | |
| 621 if (state & NGX_PEER_FAILED) { | |
| 622 now = ngx_time(); | |
| 623 | |
| 624 peer->fails++; | |
| 625 peer->accessed = now; | |
| 626 peer->checked = now; | |
| 627 | |
| 628 if (peer->max_fails) { | |
| 629 peer->effective_weight -= peer->weight / peer->max_fails; | |
|
6154
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630 |
|
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|
631 if (peer->fails >= peer->max_fails) { |
|
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632 ngx_log_error(NGX_LOG_WARN, pc->log, 0, |
|
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633 "upstream server temporarily disabled"); |
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|
634 } |
| 6115 | 635 } |
| 636 | |
| 637 ngx_log_debug2(NGX_LOG_DEBUG_STREAM, pc->log, 0, | |
| 638 "free rr peer failed: %p %i", | |
| 639 peer, peer->effective_weight); | |
| 640 | |
| 641 if (peer->effective_weight < 0) { | |
| 642 peer->effective_weight = 0; | |
| 643 } | |
| 644 | |
| 645 } else { | |
| 646 | |
| 647 /* mark peer live if check passed */ | |
| 648 | |
| 649 if (peer->accessed < peer->checked) { | |
| 650 peer->fails = 0; | |
| 651 } | |
| 652 } | |
| 653 | |
| 654 peer->conns--; | |
| 655 | |
| 656 ngx_stream_upstream_rr_peer_unlock(rrp->peers, peer); | |
| 657 ngx_stream_upstream_rr_peers_unlock(rrp->peers); | |
| 658 | |
| 659 if (pc->tries) { | |
| 660 pc->tries--; | |
| 661 } | |
| 662 } | |
| 663 | |
| 664 | |
|
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665 static void |
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666 ngx_stream_upstream_notify_round_robin_peer(ngx_peer_connection_t *pc, |
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667 void *data, ngx_uint_t type) |
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668 { |
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669 ngx_stream_upstream_rr_peer_data_t *rrp = data; |
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670 |
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671 ngx_stream_upstream_rr_peer_t *peer; |
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672 |
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673 peer = rrp->current; |
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674 |
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675 if (type == NGX_STREAM_UPSTREAM_NOTIFY_CONNECT |
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676 && pc->connection->type == SOCK_STREAM) |
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677 { |
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678 ngx_stream_upstream_rr_peers_rlock(rrp->peers); |
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679 ngx_stream_upstream_rr_peer_lock(rrp->peers, peer); |
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680 |
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681 if (peer->accessed < peer->checked) { |
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682 peer->fails = 0; |
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683 } |
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684 |
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685 ngx_stream_upstream_rr_peer_unlock(rrp->peers, peer); |
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686 ngx_stream_upstream_rr_peers_unlock(rrp->peers); |
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687 } |
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688 } |
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689 |
|
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|
690 |
| 6115 | 691 #if (NGX_STREAM_SSL) |
| 692 | |
| 693 static ngx_int_t | |
| 694 ngx_stream_upstream_set_round_robin_peer_session(ngx_peer_connection_t *pc, | |
| 695 void *data) | |
| 696 { | |
| 697 ngx_stream_upstream_rr_peer_data_t *rrp = data; | |
| 698 | |
| 699 ngx_int_t rc; | |
| 700 ngx_ssl_session_t *ssl_session; | |
| 701 ngx_stream_upstream_rr_peer_t *peer; | |
| 702 #if (NGX_STREAM_UPSTREAM_ZONE) | |
| 703 int len; | |
|
7509
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|
704 const u_char *p; |
| 6115 | 705 ngx_stream_upstream_rr_peers_t *peers; |
| 706 u_char buf[NGX_SSL_MAX_SESSION_SIZE]; | |
| 707 #endif | |
| 708 | |
| 709 peer = rrp->current; | |
| 710 | |
| 711 #if (NGX_STREAM_UPSTREAM_ZONE) | |
| 712 peers = rrp->peers; | |
| 713 | |
| 714 if (peers->shpool) { | |
| 715 ngx_stream_upstream_rr_peers_rlock(peers); | |
| 716 ngx_stream_upstream_rr_peer_lock(peers, peer); | |
| 717 | |
| 718 if (peer->ssl_session == NULL) { | |
| 719 ngx_stream_upstream_rr_peer_unlock(peers, peer); | |
| 720 ngx_stream_upstream_rr_peers_unlock(peers); | |
| 721 return NGX_OK; | |
| 722 } | |
| 723 | |
| 724 len = peer->ssl_session_len; | |
| 725 | |
| 726 ngx_memcpy(buf, peer->ssl_session, len); | |
| 727 | |
| 728 ngx_stream_upstream_rr_peer_unlock(peers, peer); | |
| 729 ngx_stream_upstream_rr_peers_unlock(peers); | |
| 730 | |
| 731 p = buf; | |
| 732 ssl_session = d2i_SSL_SESSION(NULL, &p, len); | |
| 733 | |
| 734 rc = ngx_ssl_set_session(pc->connection, ssl_session); | |
| 735 | |
| 736 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, pc->log, 0, | |
| 737 "set session: %p", ssl_session); | |
| 738 | |
| 739 ngx_ssl_free_session(ssl_session); | |
| 740 | |
| 741 return rc; | |
| 742 } | |
| 743 #endif | |
| 744 | |
| 745 ssl_session = peer->ssl_session; | |
| 746 | |
| 747 rc = ngx_ssl_set_session(pc->connection, ssl_session); | |
| 748 | |
| 749 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, pc->log, 0, | |
| 750 "set session: %p", ssl_session); | |
| 751 | |
| 752 return rc; | |
| 753 } | |
| 754 | |
| 755 | |
| 756 static void | |
| 757 ngx_stream_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc, | |
| 758 void *data) | |
| 759 { | |
| 760 ngx_stream_upstream_rr_peer_data_t *rrp = data; | |
| 761 | |
| 762 ngx_ssl_session_t *old_ssl_session, *ssl_session; | |
| 763 ngx_stream_upstream_rr_peer_t *peer; | |
| 764 #if (NGX_STREAM_UPSTREAM_ZONE) | |
| 765 int len; | |
| 766 u_char *p; | |
| 767 ngx_stream_upstream_rr_peers_t *peers; | |
| 768 u_char buf[NGX_SSL_MAX_SESSION_SIZE]; | |
| 769 #endif | |
| 770 | |
| 771 #if (NGX_STREAM_UPSTREAM_ZONE) | |
| 772 peers = rrp->peers; | |
| 773 | |
| 774 if (peers->shpool) { | |
| 775 | |
|
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diff
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|
776 ssl_session = ngx_ssl_get0_session(pc->connection); |
| 6115 | 777 |
| 778 if (ssl_session == NULL) { | |
| 779 return; | |
| 780 } | |
| 781 | |
| 782 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, pc->log, 0, | |
| 783 "save session: %p", ssl_session); | |
| 784 | |
| 785 len = i2d_SSL_SESSION(ssl_session, NULL); | |
| 786 | |
| 787 /* do not cache too big session */ | |
| 788 | |
| 789 if (len > NGX_SSL_MAX_SESSION_SIZE) { | |
| 790 return; | |
| 791 } | |
| 792 | |
| 793 p = buf; | |
| 794 (void) i2d_SSL_SESSION(ssl_session, &p); | |
| 795 | |
| 796 peer = rrp->current; | |
| 797 | |
| 798 ngx_stream_upstream_rr_peers_rlock(peers); | |
| 799 ngx_stream_upstream_rr_peer_lock(peers, peer); | |
| 800 | |
| 801 if (len > peer->ssl_session_len) { | |
| 802 ngx_shmtx_lock(&peers->shpool->mutex); | |
| 803 | |
| 804 if (peer->ssl_session) { | |
| 805 ngx_slab_free_locked(peers->shpool, peer->ssl_session); | |
| 806 } | |
| 807 | |
| 808 peer->ssl_session = ngx_slab_alloc_locked(peers->shpool, len); | |
| 809 | |
| 810 ngx_shmtx_unlock(&peers->shpool->mutex); | |
| 811 | |
| 812 if (peer->ssl_session == NULL) { | |
| 813 peer->ssl_session_len = 0; | |
| 814 | |
| 815 ngx_stream_upstream_rr_peer_unlock(peers, peer); | |
| 816 ngx_stream_upstream_rr_peers_unlock(peers); | |
| 817 return; | |
| 818 } | |
| 819 | |
| 820 peer->ssl_session_len = len; | |
| 821 } | |
| 822 | |
| 823 ngx_memcpy(peer->ssl_session, buf, len); | |
| 824 | |
| 825 ngx_stream_upstream_rr_peer_unlock(peers, peer); | |
| 826 ngx_stream_upstream_rr_peers_unlock(peers); | |
| 827 | |
| 828 return; | |
| 829 } | |
| 830 #endif | |
| 831 | |
| 832 ssl_session = ngx_ssl_get_session(pc->connection); | |
| 833 | |
| 834 if (ssl_session == NULL) { | |
| 835 return; | |
| 836 } | |
| 837 | |
| 838 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, pc->log, 0, | |
| 839 "save session: %p", ssl_session); | |
| 840 | |
| 841 peer = rrp->current; | |
| 842 | |
| 843 old_ssl_session = peer->ssl_session; | |
| 844 peer->ssl_session = ssl_session; | |
| 845 | |
| 846 if (old_ssl_session) { | |
| 847 | |
| 848 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, pc->log, 0, | |
| 849 "old session: %p", old_ssl_session); | |
| 850 | |
| 851 /* TODO: may block */ | |
| 852 | |
| 853 ngx_ssl_free_session(old_ssl_session); | |
| 854 } | |
| 855 } | |
| 856 | |
|
6643
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|
857 |
|
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|
858 static ngx_int_t |
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859 ngx_stream_upstream_empty_set_session(ngx_peer_connection_t *pc, void *data) |
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860 { |
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|
861 return NGX_OK; |
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862 } |
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|
863 |
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864 |
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|
865 static void |
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866 ngx_stream_upstream_empty_save_session(ngx_peer_connection_t *pc, void *data) |
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|
867 { |
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|
868 return; |
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869 } |
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870 |
| 6115 | 871 #endif |