Mercurial > hg > nginx
annotate src/http/ngx_http_upstream_round_robin.c @ 4412:d620f497c50f
Copyright updated.
| author | Maxim Konovalov <maxim@nginx.com> |
|---|---|
| date | Wed, 18 Jan 2012 15:07:43 +0000 |
| parents | 4fc91bae6f83 |
| children | 1db899642518 |
| rev | line source |
|---|---|
| 884 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4412 | 4 * Copyright (C) Nginx, Inc. |
| 884 | 5 */ |
| 6 | |
| 7 | |
| 8 #include <ngx_config.h> | |
| 9 #include <ngx_core.h> | |
| 10 #include <ngx_http.h> | |
| 11 | |
| 12 | |
|
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13 static ngx_int_t ngx_http_upstream_cmp_servers(const void *one, |
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14 const void *two); |
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15 static ngx_uint_t |
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16 ngx_http_upstream_get_peer(ngx_http_upstream_rr_peers_t *peers); |
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17 |
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18 #if (NGX_HTTP_SSL) |
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19 |
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20 static ngx_int_t ngx_http_upstream_empty_set_session(ngx_peer_connection_t *pc, |
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21 void *data); |
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22 static void ngx_http_upstream_empty_save_session(ngx_peer_connection_t *pc, |
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23 void *data); |
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24 |
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25 #endif |
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26 |
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27 |
| 884 | 28 ngx_int_t |
| 29 ngx_http_upstream_init_round_robin(ngx_conf_t *cf, | |
| 30 ngx_http_upstream_srv_conf_t *us) | |
| 31 { | |
| 32 ngx_url_t u; | |
| 33 ngx_uint_t i, j, n; | |
| 34 ngx_http_upstream_server_t *server; | |
| 1378 | 35 ngx_http_upstream_rr_peers_t *peers, *backup; |
| 884 | 36 |
| 37 us->peer.init = ngx_http_upstream_init_round_robin_peer; | |
| 38 | |
| 39 if (us->servers) { | |
| 40 server = us->servers->elts; | |
| 41 | |
| 1378 | 42 n = 0; |
| 43 | |
| 884 | 44 for (i = 0; i < us->servers->nelts; i++) { |
| 1378 | 45 if (server[i].backup) { |
| 46 continue; | |
| 47 } | |
| 48 | |
| 884 | 49 n += server[i].naddrs; |
| 50 } | |
| 51 | |
| 52 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
| 53 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
| 54 if (peers == NULL) { | |
| 55 return NGX_ERROR; | |
| 56 } | |
| 57 | |
| 1378 | 58 peers->single = (n == 1); |
| 884 | 59 peers->number = n; |
| 60 peers->name = &us->host; | |
| 61 | |
| 62 n = 0; | |
| 63 | |
| 64 for (i = 0; i < us->servers->nelts; i++) { | |
| 65 for (j = 0; j < server[i].naddrs; j++) { | |
| 1378 | 66 if (server[i].backup) { |
| 67 continue; | |
| 68 } | |
| 69 | |
| 884 | 70 peers->peer[n].sockaddr = server[i].addrs[j].sockaddr; |
| 71 peers->peer[n].socklen = server[i].addrs[j].socklen; | |
| 72 peers->peer[n].name = server[i].addrs[j].name; | |
| 73 peers->peer[n].max_fails = server[i].max_fails; | |
| 74 peers->peer[n].fail_timeout = server[i].fail_timeout; | |
| 75 peers->peer[n].down = server[i].down; | |
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76 peers->peer[n].weight = server[i].down ? 0 : server[i].weight; |
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77 peers->peer[n].current_weight = peers->peer[n].weight; |
| 884 | 78 n++; |
| 79 } | |
| 80 } | |
| 81 | |
| 82 us->peer.data = peers; | |
| 83 | |
| 1379 | 84 ngx_sort(&peers->peer[0], (size_t) n, |
| 85 sizeof(ngx_http_upstream_rr_peer_t), | |
| 86 ngx_http_upstream_cmp_servers); | |
| 87 | |
| 1378 | 88 /* backup servers */ |
| 89 | |
| 90 n = 0; | |
| 91 | |
| 92 for (i = 0; i < us->servers->nelts; i++) { | |
| 93 if (!server[i].backup) { | |
| 94 continue; | |
| 95 } | |
| 96 | |
| 97 n += server[i].naddrs; | |
| 98 } | |
| 99 | |
| 100 if (n == 0) { | |
| 101 return NGX_OK; | |
| 102 } | |
| 103 | |
| 104 backup = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
| 105 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
| 106 if (backup == NULL) { | |
| 107 return NGX_ERROR; | |
| 108 } | |
| 109 | |
| 110 peers->single = 0; | |
| 111 backup->single = 0; | |
| 112 backup->number = n; | |
| 113 backup->name = &us->host; | |
| 114 | |
| 115 n = 0; | |
| 116 | |
| 117 for (i = 0; i < us->servers->nelts; i++) { | |
| 118 for (j = 0; j < server[i].naddrs; j++) { | |
| 119 if (!server[i].backup) { | |
| 120 continue; | |
| 121 } | |
| 122 | |
| 123 backup->peer[n].sockaddr = server[i].addrs[j].sockaddr; | |
| 124 backup->peer[n].socklen = server[i].addrs[j].socklen; | |
| 125 backup->peer[n].name = server[i].addrs[j].name; | |
| 126 backup->peer[n].weight = server[i].weight; | |
| 127 backup->peer[n].current_weight = server[i].weight; | |
| 128 backup->peer[n].max_fails = server[i].max_fails; | |
| 129 backup->peer[n].fail_timeout = server[i].fail_timeout; | |
| 130 backup->peer[n].down = server[i].down; | |
| 131 n++; | |
| 132 } | |
| 133 } | |
| 134 | |
| 135 peers->next = backup; | |
| 136 | |
| 1379 | 137 ngx_sort(&backup->peer[0], (size_t) n, |
| 138 sizeof(ngx_http_upstream_rr_peer_t), | |
| 139 ngx_http_upstream_cmp_servers); | |
| 140 | |
| 884 | 141 return NGX_OK; |
| 142 } | |
| 143 | |
| 144 | |
| 145 /* an upstream implicitly defined by proxy_pass, etc. */ | |
| 146 | |
| 906 | 147 if (us->port == 0 && us->default_port == 0) { |
| 148 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, | |
| 149 "no port in upstream \"%V\" in %s:%ui", | |
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150 &us->host, us->file_name, us->line); |
| 906 | 151 return NGX_ERROR; |
| 152 } | |
| 153 | |
| 884 | 154 ngx_memzero(&u, sizeof(ngx_url_t)); |
| 155 | |
| 156 u.host = us->host; | |
| 916 | 157 u.port = (in_port_t) (us->port ? us->port : us->default_port); |
| 884 | 158 |
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159 if (ngx_inet_resolve_host(cf->pool, &u) != NGX_OK) { |
| 884 | 160 if (u.err) { |
| 161 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, | |
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162 "%s in upstream \"%V\" in %s:%ui", |
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163 u.err, &us->host, us->file_name, us->line); |
| 884 | 164 } |
| 165 | |
| 166 return NGX_ERROR; | |
| 167 } | |
| 168 | |
| 169 n = u.naddrs; | |
| 170 | |
| 171 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
| 172 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
| 173 if (peers == NULL) { | |
| 174 return NGX_ERROR; | |
| 175 } | |
| 176 | |
| 1378 | 177 peers->single = (n == 1); |
| 884 | 178 peers->number = n; |
| 179 peers->name = &us->host; | |
| 180 | |
| 181 for (i = 0; i < u.naddrs; i++) { | |
| 1564 | 182 peers->peer[i].sockaddr = u.addrs[i].sockaddr; |
| 183 peers->peer[i].socklen = u.addrs[i].socklen; | |
| 184 peers->peer[i].name = u.addrs[i].name; | |
| 185 peers->peer[i].weight = 1; | |
| 186 peers->peer[i].current_weight = 1; | |
| 187 peers->peer[i].max_fails = 1; | |
| 188 peers->peer[i].fail_timeout = 10; | |
| 884 | 189 } |
| 190 | |
| 191 us->peer.data = peers; | |
| 192 | |
| 1378 | 193 /* implicitly defined upstream has no backup servers */ |
| 194 | |
| 884 | 195 return NGX_OK; |
| 196 } | |
| 197 | |
| 198 | |
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199 static ngx_int_t |
| 1379 | 200 ngx_http_upstream_cmp_servers(const void *one, const void *two) |
| 201 { | |
| 202 ngx_http_upstream_rr_peer_t *first, *second; | |
| 203 | |
| 204 first = (ngx_http_upstream_rr_peer_t *) one; | |
| 205 second = (ngx_http_upstream_rr_peer_t *) two; | |
| 206 | |
| 207 return (first->weight < second->weight); | |
| 208 } | |
| 209 | |
| 210 | |
| 884 | 211 ngx_int_t |
| 212 ngx_http_upstream_init_round_robin_peer(ngx_http_request_t *r, | |
| 213 ngx_http_upstream_srv_conf_t *us) | |
| 214 { | |
| 215 ngx_uint_t n; | |
| 216 ngx_http_upstream_rr_peer_data_t *rrp; | |
| 217 | |
| 218 rrp = r->upstream->peer.data; | |
| 219 | |
| 220 if (rrp == NULL) { | |
| 221 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t)); | |
| 222 if (rrp == NULL) { | |
| 223 return NGX_ERROR; | |
| 224 } | |
| 225 | |
| 226 r->upstream->peer.data = rrp; | |
| 227 } | |
| 228 | |
| 229 rrp->peers = us->peer.data; | |
| 230 rrp->current = 0; | |
| 231 | |
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232 n = rrp->peers->number; |
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233 |
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234 if (rrp->peers->next && rrp->peers->next->number > n) { |
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235 n = rrp->peers->next->number; |
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236 } |
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237 |
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238 if (n <= 8 * sizeof(uintptr_t)) { |
| 884 | 239 rrp->tried = &rrp->data; |
| 240 rrp->data = 0; | |
| 241 | |
| 242 } else { | |
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243 n = (n + (8 * sizeof(uintptr_t) - 1)) / (8 * sizeof(uintptr_t)); |
| 884 | 244 |
| 245 rrp->tried = ngx_pcalloc(r->pool, n * sizeof(uintptr_t)); | |
| 246 if (rrp->tried == NULL) { | |
| 247 return NGX_ERROR; | |
| 248 } | |
| 249 } | |
| 250 | |
| 251 r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer; | |
| 252 r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer; | |
| 253 r->upstream->peer.tries = rrp->peers->number; | |
| 254 #if (NGX_HTTP_SSL) | |
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255 r->upstream->peer.set_session = |
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256 ngx_http_upstream_set_round_robin_peer_session; |
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257 r->upstream->peer.save_session = |
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258 ngx_http_upstream_save_round_robin_peer_session; |
| 884 | 259 #endif |
| 260 | |
| 261 return NGX_OK; | |
| 262 } | |
| 263 | |
| 264 | |
| 265 ngx_int_t | |
| 1658 | 266 ngx_http_upstream_create_round_robin_peer(ngx_http_request_t *r, |
| 267 ngx_http_upstream_resolved_t *ur) | |
| 268 { | |
| 269 u_char *p; | |
| 270 size_t len; | |
| 271 ngx_uint_t i, n; | |
| 272 struct sockaddr_in *sin; | |
| 273 ngx_http_upstream_rr_peers_t *peers; | |
| 274 ngx_http_upstream_rr_peer_data_t *rrp; | |
| 275 | |
| 276 rrp = r->upstream->peer.data; | |
| 277 | |
| 278 if (rrp == NULL) { | |
| 279 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t)); | |
| 280 if (rrp == NULL) { | |
| 281 return NGX_ERROR; | |
| 282 } | |
| 283 | |
| 284 r->upstream->peer.data = rrp; | |
| 285 } | |
| 286 | |
| 287 peers = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
| 288 + sizeof(ngx_http_upstream_rr_peer_t) * (ur->naddrs - 1)); | |
| 289 if (peers == NULL) { | |
| 290 return NGX_ERROR; | |
| 291 } | |
| 292 | |
| 293 peers->single = (ur->naddrs == 1); | |
| 294 peers->number = ur->naddrs; | |
| 295 peers->name = &ur->host; | |
| 296 | |
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297 if (ur->sockaddr) { |
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298 peers->peer[0].sockaddr = ur->sockaddr; |
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299 peers->peer[0].socklen = ur->socklen; |
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300 peers->peer[0].name = ur->host; |
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301 peers->peer[0].weight = 1; |
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302 peers->peer[0].current_weight = 1; |
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303 peers->peer[0].max_fails = 1; |
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304 peers->peer[0].fail_timeout = 10; |
| 1658 | 305 |
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306 } else { |
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307 |
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308 for (i = 0; i < ur->naddrs; i++) { |
| 1658 | 309 |
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310 len = NGX_INET_ADDRSTRLEN + sizeof(":65536") - 1; |
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311 |
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312 p = ngx_pnalloc(r->pool, len); |
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313 if (p == NULL) { |
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314 return NGX_ERROR; |
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315 } |
| 1658 | 316 |
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317 len = ngx_inet_ntop(AF_INET, &ur->addrs[i], p, NGX_INET_ADDRSTRLEN); |
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318 len = ngx_sprintf(&p[len], ":%d", ur->port) - p; |
| 1658 | 319 |
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320 sin = ngx_pcalloc(r->pool, sizeof(struct sockaddr_in)); |
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321 if (sin == NULL) { |
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322 return NGX_ERROR; |
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323 } |
| 1658 | 324 |
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325 sin->sin_family = AF_INET; |
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326 sin->sin_port = htons(ur->port); |
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327 sin->sin_addr.s_addr = ur->addrs[i]; |
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328 |
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329 peers->peer[i].sockaddr = (struct sockaddr *) sin; |
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330 peers->peer[i].socklen = sizeof(struct sockaddr_in); |
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331 peers->peer[i].name.len = len; |
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332 peers->peer[i].name.data = p; |
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333 peers->peer[i].weight = 1; |
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334 peers->peer[i].current_weight = 1; |
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335 peers->peer[i].max_fails = 1; |
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336 peers->peer[i].fail_timeout = 10; |
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337 } |
| 1658 | 338 } |
| 339 | |
| 340 rrp->peers = peers; | |
| 341 rrp->current = 0; | |
| 342 | |
| 343 if (rrp->peers->number <= 8 * sizeof(uintptr_t)) { | |
| 344 rrp->tried = &rrp->data; | |
| 345 rrp->data = 0; | |
| 346 | |
| 347 } else { | |
| 348 n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1)) | |
| 349 / (8 * sizeof(uintptr_t)); | |
| 350 | |
| 351 rrp->tried = ngx_pcalloc(r->pool, n * sizeof(uintptr_t)); | |
| 352 if (rrp->tried == NULL) { | |
| 353 return NGX_ERROR; | |
| 354 } | |
| 355 } | |
| 356 | |
| 357 r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer; | |
| 358 r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer; | |
| 359 r->upstream->peer.tries = rrp->peers->number; | |
| 360 #if (NGX_HTTP_SSL) | |
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361 r->upstream->peer.set_session = ngx_http_upstream_empty_set_session; |
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362 r->upstream->peer.save_session = ngx_http_upstream_empty_save_session; |
| 1658 | 363 #endif |
| 364 | |
| 365 return NGX_OK; | |
| 366 } | |
| 367 | |
| 368 | |
| 369 ngx_int_t | |
| 884 | 370 ngx_http_upstream_get_round_robin_peer(ngx_peer_connection_t *pc, void *data) |
| 371 { | |
| 372 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
| 373 | |
| 1378 | 374 time_t now; |
| 375 uintptr_t m; | |
| 376 ngx_int_t rc; | |
| 377 ngx_uint_t i, n; | |
| 378 ngx_connection_t *c; | |
| 379 ngx_http_upstream_rr_peer_t *peer; | |
| 380 ngx_http_upstream_rr_peers_t *peers; | |
| 884 | 381 |
| 382 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
| 383 "get rr peer, try: %ui", pc->tries); | |
| 384 | |
| 385 now = ngx_time(); | |
| 386 | |
| 387 /* ngx_lock_mutex(rrp->peers->mutex); */ | |
| 388 | |
| 389 if (rrp->peers->last_cached) { | |
| 390 | |
| 391 /* cached connection */ | |
| 392 | |
| 393 c = rrp->peers->cached[rrp->peers->last_cached]; | |
| 394 rrp->peers->last_cached--; | |
| 395 | |
| 396 /* ngx_unlock_mutex(ppr->peers->mutex); */ | |
| 397 | |
| 398 #if (NGX_THREADS) | |
| 399 c->read->lock = c->read->own_lock; | |
| 400 c->write->lock = c->write->own_lock; | |
| 401 #endif | |
| 402 | |
| 403 pc->connection = c; | |
| 404 pc->cached = 1; | |
| 405 | |
| 406 return NGX_OK; | |
| 407 } | |
| 408 | |
| 409 pc->cached = 0; | |
| 410 pc->connection = NULL; | |
| 411 | |
| 1378 | 412 if (rrp->peers->single) { |
| 884 | 413 peer = &rrp->peers->peer[0]; |
| 414 | |
| 415 } else { | |
| 416 | |
| 417 /* there are several peers */ | |
| 418 | |
| 419 if (pc->tries == rrp->peers->number) { | |
| 420 | |
| 421 /* it's a first try - get a current peer */ | |
| 422 | |
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423 i = pc->tries; |
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424 |
| 884 | 425 for ( ;; ) { |
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426 rrp->current = ngx_http_upstream_get_peer(rrp->peers); |
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427 |
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428 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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429 "get rr peer, current: %ui %i", |
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430 rrp->current, |
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431 rrp->peers->peer[rrp->current].current_weight); |
| 884 | 432 |
| 433 n = rrp->current / (8 * sizeof(uintptr_t)); | |
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434 m = (uintptr_t) 1 << rrp->current % (8 * sizeof(uintptr_t)); |
| 884 | 435 |
| 436 if (!(rrp->tried[n] & m)) { | |
| 437 peer = &rrp->peers->peer[rrp->current]; | |
| 438 | |
| 439 if (!peer->down) { | |
| 440 | |
| 441 if (peer->max_fails == 0 | |
| 442 || peer->fails < peer->max_fails) | |
| 443 { | |
| 444 break; | |
| 445 } | |
| 446 | |
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447 if (now - peer->checked > peer->fail_timeout) { |
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448 peer->checked = now; |
| 884 | 449 break; |
| 450 } | |
| 451 | |
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452 peer->current_weight = 0; |
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453 |
| 884 | 454 } else { |
| 455 rrp->tried[n] |= m; | |
| 456 } | |
| 457 | |
| 458 pc->tries--; | |
| 459 } | |
| 460 | |
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461 if (pc->tries == 0) { |
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462 goto failed; |
| 884 | 463 } |
| 464 | |
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465 if (--i == 0) { |
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466 ngx_log_error(NGX_LOG_ALERT, pc->log, 0, |
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467 "round robin upstream stuck on %ui tries", |
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468 pc->tries); |
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469 goto failed; |
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470 } |
| 884 | 471 } |
| 472 | |
| 473 peer->current_weight--; | |
| 474 | |
| 475 } else { | |
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476 |
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477 i = pc->tries; |
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478 |
| 884 | 479 for ( ;; ) { |
| 480 n = rrp->current / (8 * sizeof(uintptr_t)); | |
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481 m = (uintptr_t) 1 << rrp->current % (8 * sizeof(uintptr_t)); |
| 884 | 482 |
| 483 if (!(rrp->tried[n] & m)) { | |
| 484 | |
| 485 peer = &rrp->peers->peer[rrp->current]; | |
| 486 | |
| 487 if (!peer->down) { | |
| 488 | |
| 489 if (peer->max_fails == 0 | |
| 490 || peer->fails < peer->max_fails) | |
| 491 { | |
| 492 break; | |
| 493 } | |
| 494 | |
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495 if (now - peer->checked > peer->fail_timeout) { |
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496 peer->checked = now; |
| 884 | 497 break; |
| 498 } | |
| 499 | |
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500 peer->current_weight = 0; |
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501 |
| 884 | 502 } else { |
| 503 rrp->tried[n] |= m; | |
| 504 } | |
| 505 | |
| 506 pc->tries--; | |
| 507 } | |
| 508 | |
| 509 rrp->current++; | |
| 510 | |
| 511 if (rrp->current >= rrp->peers->number) { | |
| 512 rrp->current = 0; | |
| 513 } | |
| 514 | |
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515 if (pc->tries == 0) { |
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516 goto failed; |
| 884 | 517 } |
| 518 | |
|
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519 if (--i == 0) { |
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520 ngx_log_error(NGX_LOG_ALERT, pc->log, 0, |
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521 "round robin upstream stuck on %ui tries", |
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522 pc->tries); |
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523 goto failed; |
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524 } |
| 884 | 525 } |
| 526 | |
| 527 peer->current_weight--; | |
| 528 } | |
| 529 | |
| 530 rrp->tried[n] |= m; | |
| 531 } | |
| 532 | |
| 533 pc->sockaddr = peer->sockaddr; | |
| 534 pc->socklen = peer->socklen; | |
| 535 pc->name = &peer->name; | |
| 536 | |
| 537 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
| 538 | |
| 1378 | 539 if (pc->tries == 1 && rrp->peers->next) { |
| 540 pc->tries += rrp->peers->next->number; | |
| 541 | |
| 542 n = rrp->peers->next->number / (8 * sizeof(uintptr_t)) + 1; | |
| 1389 | 543 for (i = 0; i < n; i++) { |
| 1378 | 544 rrp->tried[i] = 0; |
| 545 } | |
| 546 } | |
| 547 | |
| 884 | 548 return NGX_OK; |
| 549 | |
| 550 failed: | |
| 551 | |
| 1378 | 552 peers = rrp->peers; |
| 553 | |
| 554 if (peers->next) { | |
| 555 | |
| 556 /* ngx_unlock_mutex(peers->mutex); */ | |
| 557 | |
| 558 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, pc->log, 0, "backup servers"); | |
| 559 | |
| 560 rrp->peers = peers->next; | |
| 561 pc->tries = rrp->peers->number; | |
| 562 | |
| 563 n = rrp->peers->number / (8 * sizeof(uintptr_t)) + 1; | |
| 1389 | 564 for (i = 0; i < n; i++) { |
| 1378 | 565 rrp->tried[i] = 0; |
| 566 } | |
| 567 | |
| 568 rc = ngx_http_upstream_get_round_robin_peer(pc, rrp); | |
| 569 | |
| 570 if (rc != NGX_BUSY) { | |
| 571 return rc; | |
| 572 } | |
| 573 | |
| 574 /* ngx_lock_mutex(peers->mutex); */ | |
| 575 } | |
| 576 | |
| 884 | 577 /* all peers failed, mark them as live for quick recovery */ |
| 578 | |
| 1378 | 579 for (i = 0; i < peers->number; i++) { |
| 580 peers->peer[i].fails = 0; | |
| 884 | 581 } |
| 582 | |
| 1378 | 583 /* ngx_unlock_mutex(peers->mutex); */ |
| 884 | 584 |
| 1378 | 585 pc->name = peers->name; |
| 884 | 586 |
| 587 return NGX_BUSY; | |
| 588 } | |
| 589 | |
| 590 | |
|
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591 static ngx_uint_t |
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592 ngx_http_upstream_get_peer(ngx_http_upstream_rr_peers_t *peers) |
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593 { |
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594 ngx_uint_t i, n, reset = 0; |
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595 ngx_http_upstream_rr_peer_t *peer; |
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596 |
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597 peer = &peers->peer[0]; |
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598 |
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599 for ( ;; ) { |
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600 |
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601 for (i = 0; i < peers->number; i++) { |
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602 |
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603 if (peer[i].current_weight <= 0) { |
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604 continue; |
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605 } |
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606 |
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607 n = i; |
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608 |
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609 while (i < peers->number - 1) { |
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610 |
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611 i++; |
|
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fair upstream weight balancer
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|
612 |
|
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|
613 if (peer[i].current_weight <= 0) { |
|
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|
614 continue; |
|
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|
615 } |
|
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parents:
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|
616 |
|
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|
617 if (peer[n].current_weight * 1000 / peer[i].current_weight |
|
1465
a9132739bb57
balance more fair when there are several servers with equal weights,
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|
618 > peer[n].weight * 1000 / peer[i].weight) |
|
1344
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|
619 { |
|
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|
620 return n; |
|
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|
621 } |
|
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|
622 |
|
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|
623 n = i; |
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|
624 } |
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|
625 |
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|
626 if (peer[i].current_weight > 0) { |
|
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|
627 n = i; |
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|
628 } |
|
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|
629 |
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|
630 return n; |
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|
631 } |
|
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parents:
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|
632 |
|
4010
74a93d3fdd85
Fixing cpu hog with all upstream servers marked "down".
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
633 if (reset++) { |
|
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Fixing cpu hog with all upstream servers marked "down".
Maxim Dounin <mdounin@mdounin.ru>
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|
634 return 0; |
|
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Fixing cpu hog with all upstream servers marked "down".
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
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|
635 } |
|
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Fixing cpu hog with all upstream servers marked "down".
Maxim Dounin <mdounin@mdounin.ru>
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changeset
|
636 |
|
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|
637 for (i = 0; i < peers->number; i++) { |
|
1887
abbef7b5dab8
set absolute weight, this fixes bogus "no live upstream" case when
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
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|
638 peer[i].current_weight = peer[i].weight; |
|
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|
639 } |
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|
640 } |
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|
641 } |
|
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|
642 |
|
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|
643 |
| 884 | 644 void |
| 645 ngx_http_upstream_free_round_robin_peer(ngx_peer_connection_t *pc, void *data, | |
| 646 ngx_uint_t state) | |
| 647 { | |
| 648 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
| 649 | |
| 650 time_t now; | |
| 651 ngx_http_upstream_rr_peer_t *peer; | |
| 652 | |
| 653 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
| 654 "free rr peer %ui %ui", pc->tries, state); | |
| 655 | |
| 656 if (state == 0 && pc->tries == 0) { | |
| 657 return; | |
| 658 } | |
| 659 | |
| 660 /* TODO: NGX_PEER_KEEPALIVE */ | |
| 661 | |
| 1378 | 662 if (rrp->peers->single) { |
| 884 | 663 pc->tries = 0; |
| 664 return; | |
| 665 } | |
| 666 | |
|
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Better recheck of dead upstream servers.
Maxim Dounin <mdounin@mdounin.ru>
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|
667 peer = &rrp->peers->peer[rrp->current]; |
|
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Better recheck of dead upstream servers.
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changeset
|
668 |
| 884 | 669 if (state & NGX_PEER_FAILED) { |
| 670 now = ngx_time(); | |
| 671 | |
| 672 /* ngx_lock_mutex(rrp->peers->mutex); */ | |
| 673 | |
| 674 peer->fails++; | |
| 675 peer->accessed = now; | |
|
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Better recheck of dead upstream servers.
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|
676 peer->checked = now; |
| 884 | 677 |
|
2204
70a2bcc7e307
fix divide by zero if max_fails=0
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
678 if (peer->max_fails) { |
|
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fix divide by zero if max_fails=0
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|
679 peer->current_weight -= peer->weight / peer->max_fails; |
|
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fix divide by zero if max_fails=0
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|
680 } |
|
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|
681 |
|
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|
682 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
|
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|
683 "free rr peer failed: %ui %i", |
|
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|
684 rrp->current, peer->current_weight); |
|
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|
685 |
|
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|
686 if (peer->current_weight < 0) { |
|
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|
687 peer->current_weight = 0; |
| 884 | 688 } |
| 689 | |
| 690 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
|
4207
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Better recheck of dead upstream servers.
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diff
changeset
|
691 |
|
4fc91bae6f83
Better recheck of dead upstream servers.
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|
692 } else { |
|
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Better recheck of dead upstream servers.
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diff
changeset
|
693 |
|
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Better recheck of dead upstream servers.
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changeset
|
694 /* mark peer live if check passed */ |
|
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Better recheck of dead upstream servers.
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diff
changeset
|
695 |
|
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Better recheck of dead upstream servers.
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parents:
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diff
changeset
|
696 if (peer->accessed < peer->checked) { |
|
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Better recheck of dead upstream servers.
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parents:
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changeset
|
697 peer->fails = 0; |
|
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Better recheck of dead upstream servers.
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|
698 } |
| 884 | 699 } |
| 700 | |
| 701 rrp->current++; | |
| 702 | |
| 703 if (rrp->current >= rrp->peers->number) { | |
| 704 rrp->current = 0; | |
| 705 } | |
| 706 | |
| 707 if (pc->tries) { | |
| 708 pc->tries--; | |
| 709 } | |
| 710 | |
| 711 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
| 712 } | |
| 713 | |
| 714 | |
| 715 #if (NGX_HTTP_SSL) | |
| 716 | |
|
1284
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fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
717 ngx_int_t |
|
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fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
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diff
changeset
|
718 ngx_http_upstream_set_round_robin_peer_session(ngx_peer_connection_t *pc, |
|
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fix segfault when session was freed twice
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diff
changeset
|
719 void *data) |
| 884 | 720 { |
| 721 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
| 722 | |
|
1284
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fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
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diff
changeset
|
723 ngx_int_t rc; |
| 884 | 724 ngx_ssl_session_t *ssl_session; |
| 725 ngx_http_upstream_rr_peer_t *peer; | |
| 726 | |
|
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Igor Sysoev <igor@sysoev.ru>
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diff
changeset
|
727 peer = &rrp->peers->peer[rrp->current]; |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
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diff
changeset
|
728 |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
729 /* TODO: threads only mutex */ |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
730 /* ngx_lock_mutex(rrp->peers->mutex); */ |
|
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fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
731 |
|
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fix segfault when session was freed twice
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parents:
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diff
changeset
|
732 ssl_session = peer->ssl_session; |
|
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fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
733 |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
734 rc = ngx_ssl_set_session(pc->connection, ssl_session); |
|
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fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
735 |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
736 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
| 1443 | 737 "set session: %p:%d", |
| 738 ssl_session, ssl_session ? ssl_session->references : 0); | |
|
1284
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
739 |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
740 /* ngx_unlock_mutex(rrp->peers->mutex); */ |
|
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fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
741 |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
742 return rc; |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
743 } |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
744 |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
745 |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
746 void |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
747 ngx_http_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc, |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
748 void *data) |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
749 { |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
750 ngx_http_upstream_rr_peer_data_t *rrp = data; |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
751 |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
752 ngx_ssl_session_t *old_ssl_session, *ssl_session; |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
753 ngx_http_upstream_rr_peer_t *peer; |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
754 |
| 884 | 755 ssl_session = ngx_ssl_get_session(pc->connection); |
| 756 | |
| 757 if (ssl_session == NULL) { | |
| 758 return; | |
| 759 } | |
| 760 | |
|
1284
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
761 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
| 1443 | 762 "save session: %p:%d", ssl_session, ssl_session->references); |
|
1284
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fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
763 |
| 884 | 764 peer = &rrp->peers->peer[rrp->current]; |
| 765 | |
|
1284
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
766 /* TODO: threads only mutex */ |
| 884 | 767 /* ngx_lock_mutex(rrp->peers->mutex); */ |
|
1284
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
768 |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
769 old_ssl_session = peer->ssl_session; |
| 884 | 770 peer->ssl_session = ssl_session; |
|
1284
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fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
771 |
| 884 | 772 /* ngx_unlock_mutex(rrp->peers->mutex); */ |
| 773 | |
|
1284
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
774 if (old_ssl_session) { |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
775 |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
776 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
| 1443 | 777 "old session: %p:%d", |
|
1284
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fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
778 old_ssl_session, old_ssl_session->references); |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
779 |
| 884 | 780 /* TODO: may block */ |
|
1284
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
781 |
|
be2b895d31e0
fix segfault when session was freed twice
Igor Sysoev <igor@sysoev.ru>
parents:
1206
diff
changeset
|
782 ngx_ssl_free_session(old_ssl_session); |
| 884 | 783 } |
| 784 } | |
| 785 | |
|
3964
ff127ba3b091
do not try to reuse and save a SSL session for a peer created on the fly
Igor Sysoev <igor@sysoev.ru>
parents:
2422
diff
changeset
|
786 |
|
ff127ba3b091
do not try to reuse and save a SSL session for a peer created on the fly
Igor Sysoev <igor@sysoev.ru>
parents:
2422
diff
changeset
|
787 static ngx_int_t |
|
ff127ba3b091
do not try to reuse and save a SSL session for a peer created on the fly
Igor Sysoev <igor@sysoev.ru>
parents:
2422
diff
changeset
|
788 ngx_http_upstream_empty_set_session(ngx_peer_connection_t *pc, void *data) |
|
ff127ba3b091
do not try to reuse and save a SSL session for a peer created on the fly
Igor Sysoev <igor@sysoev.ru>
parents:
2422
diff
changeset
|
789 { |
|
ff127ba3b091
do not try to reuse and save a SSL session for a peer created on the fly
Igor Sysoev <igor@sysoev.ru>
parents:
2422
diff
changeset
|
790 return NGX_OK; |
|
ff127ba3b091
do not try to reuse and save a SSL session for a peer created on the fly
Igor Sysoev <igor@sysoev.ru>
parents:
2422
diff
changeset
|
791 } |
|
ff127ba3b091
do not try to reuse and save a SSL session for a peer created on the fly
Igor Sysoev <igor@sysoev.ru>
parents:
2422
diff
changeset
|
792 |
|
ff127ba3b091
do not try to reuse and save a SSL session for a peer created on the fly
Igor Sysoev <igor@sysoev.ru>
parents:
2422
diff
changeset
|
793 |
|
ff127ba3b091
do not try to reuse and save a SSL session for a peer created on the fly
Igor Sysoev <igor@sysoev.ru>
parents:
2422
diff
changeset
|
794 static void |
|
ff127ba3b091
do not try to reuse and save a SSL session for a peer created on the fly
Igor Sysoev <igor@sysoev.ru>
parents:
2422
diff
changeset
|
795 ngx_http_upstream_empty_save_session(ngx_peer_connection_t *pc, void *data) |
|
ff127ba3b091
do not try to reuse and save a SSL session for a peer created on the fly
Igor Sysoev <igor@sysoev.ru>
parents:
2422
diff
changeset
|
796 { |
|
ff127ba3b091
do not try to reuse and save a SSL session for a peer created on the fly
Igor Sysoev <igor@sysoev.ru>
parents:
2422
diff
changeset
|
797 return; |
|
ff127ba3b091
do not try to reuse and save a SSL session for a peer created on the fly
Igor Sysoev <igor@sysoev.ru>
parents:
2422
diff
changeset
|
798 } |
|
ff127ba3b091
do not try to reuse and save a SSL session for a peer created on the fly
Igor Sysoev <igor@sysoev.ru>
parents:
2422
diff
changeset
|
799 |
| 884 | 800 #endif |