Mercurial > hg > nginx
annotate src/http/ngx_http_upstream_round_robin.c @ 5135:0811376954e4
Upstream: removed sorting of upstream servers.
Sorting of upstream servers by their weights is not required by
current balancing algorithms.
This will likely change mapping to backends served by ip_hash
weighted upstreams.
| author | Ruslan Ermilov <ru@nginx.com> |
|---|---|
| date | Mon, 25 Mar 2013 13:41:30 +0000 |
| parents | 089a662c17d1 |
| children | 88a302caca75 |
| 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_http_upstream_rr_peer_t *ngx_http_upstream_get_peer( |
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14 ngx_http_upstream_rr_peer_data_t *rrp); |
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15 |
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16 #if (NGX_HTTP_SSL) |
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17 |
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18 static ngx_int_t ngx_http_upstream_empty_set_session(ngx_peer_connection_t *pc, |
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19 void *data); |
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20 static void ngx_http_upstream_empty_save_session(ngx_peer_connection_t *pc, |
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21 void *data); |
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22 |
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23 #endif |
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24 |
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25 |
| 884 | 26 ngx_int_t |
| 27 ngx_http_upstream_init_round_robin(ngx_conf_t *cf, | |
| 28 ngx_http_upstream_srv_conf_t *us) | |
| 29 { | |
| 30 ngx_url_t u; | |
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31 ngx_uint_t i, j, n, w; |
| 884 | 32 ngx_http_upstream_server_t *server; |
| 1378 | 33 ngx_http_upstream_rr_peers_t *peers, *backup; |
| 884 | 34 |
| 35 us->peer.init = ngx_http_upstream_init_round_robin_peer; | |
| 36 | |
| 37 if (us->servers) { | |
| 38 server = us->servers->elts; | |
| 39 | |
| 1378 | 40 n = 0; |
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41 w = 0; |
| 1378 | 42 |
| 884 | 43 for (i = 0; i < us->servers->nelts; i++) { |
| 1378 | 44 if (server[i].backup) { |
| 45 continue; | |
| 46 } | |
| 47 | |
| 884 | 48 n += server[i].naddrs; |
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49 w += server[i].naddrs * server[i].weight; |
| 884 | 50 } |
| 51 | |
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52 if (n == 0) { |
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53 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, |
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54 "no servers in upstream \"%V\" in %s:%ui", |
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55 &us->host, us->file_name, us->line); |
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56 return NGX_ERROR; |
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57 } |
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58 |
| 884 | 59 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) |
| 60 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
| 61 if (peers == NULL) { | |
| 62 return NGX_ERROR; | |
| 63 } | |
| 64 | |
| 1378 | 65 peers->single = (n == 1); |
| 884 | 66 peers->number = n; |
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67 peers->weighted = (w != n); |
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68 peers->total_weight = w; |
| 884 | 69 peers->name = &us->host; |
| 70 | |
| 71 n = 0; | |
| 72 | |
| 73 for (i = 0; i < us->servers->nelts; i++) { | |
| 74 for (j = 0; j < server[i].naddrs; j++) { | |
| 1378 | 75 if (server[i].backup) { |
| 76 continue; | |
| 77 } | |
| 78 | |
| 884 | 79 peers->peer[n].sockaddr = server[i].addrs[j].sockaddr; |
| 80 peers->peer[n].socklen = server[i].addrs[j].socklen; | |
| 81 peers->peer[n].name = server[i].addrs[j].name; | |
| 82 peers->peer[n].max_fails = server[i].max_fails; | |
| 83 peers->peer[n].fail_timeout = server[i].fail_timeout; | |
| 84 peers->peer[n].down = server[i].down; | |
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85 peers->peer[n].weight = server[i].weight; |
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86 peers->peer[n].effective_weight = server[i].weight; |
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87 peers->peer[n].current_weight = 0; |
| 884 | 88 n++; |
| 89 } | |
| 90 } | |
| 91 | |
| 92 us->peer.data = peers; | |
| 93 | |
| 1378 | 94 /* backup servers */ |
| 95 | |
| 96 n = 0; | |
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97 w = 0; |
| 1378 | 98 |
| 99 for (i = 0; i < us->servers->nelts; i++) { | |
| 100 if (!server[i].backup) { | |
| 101 continue; | |
| 102 } | |
| 103 | |
| 104 n += server[i].naddrs; | |
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105 w += server[i].naddrs * server[i].weight; |
| 1378 | 106 } |
| 107 | |
| 108 if (n == 0) { | |
| 109 return NGX_OK; | |
| 110 } | |
| 111 | |
| 112 backup = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
| 113 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
| 114 if (backup == NULL) { | |
| 115 return NGX_ERROR; | |
| 116 } | |
| 117 | |
| 118 peers->single = 0; | |
| 119 backup->single = 0; | |
| 120 backup->number = n; | |
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121 backup->weighted = (w != n); |
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122 backup->total_weight = w; |
| 1378 | 123 backup->name = &us->host; |
| 124 | |
| 125 n = 0; | |
| 126 | |
| 127 for (i = 0; i < us->servers->nelts; i++) { | |
| 128 for (j = 0; j < server[i].naddrs; j++) { | |
| 129 if (!server[i].backup) { | |
| 130 continue; | |
| 131 } | |
| 132 | |
| 133 backup->peer[n].sockaddr = server[i].addrs[j].sockaddr; | |
| 134 backup->peer[n].socklen = server[i].addrs[j].socklen; | |
| 135 backup->peer[n].name = server[i].addrs[j].name; | |
| 136 backup->peer[n].weight = server[i].weight; | |
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137 backup->peer[n].effective_weight = server[i].weight; |
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138 backup->peer[n].current_weight = 0; |
| 1378 | 139 backup->peer[n].max_fails = server[i].max_fails; |
| 140 backup->peer[n].fail_timeout = server[i].fail_timeout; | |
| 141 backup->peer[n].down = server[i].down; | |
| 142 n++; | |
| 143 } | |
| 144 } | |
| 145 | |
| 146 peers->next = backup; | |
| 147 | |
| 884 | 148 return NGX_OK; |
| 149 } | |
| 150 | |
| 151 | |
| 152 /* an upstream implicitly defined by proxy_pass, etc. */ | |
| 153 | |
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154 if (us->port == 0) { |
| 906 | 155 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, |
| 156 "no port in upstream \"%V\" in %s:%ui", | |
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157 &us->host, us->file_name, us->line); |
| 906 | 158 return NGX_ERROR; |
| 159 } | |
| 160 | |
| 884 | 161 ngx_memzero(&u, sizeof(ngx_url_t)); |
| 162 | |
| 163 u.host = us->host; | |
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164 u.port = us->port; |
| 884 | 165 |
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166 if (ngx_inet_resolve_host(cf->pool, &u) != NGX_OK) { |
| 884 | 167 if (u.err) { |
| 168 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, | |
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169 "%s in upstream \"%V\" in %s:%ui", |
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170 u.err, &us->host, us->file_name, us->line); |
| 884 | 171 } |
| 172 | |
| 173 return NGX_ERROR; | |
| 174 } | |
| 175 | |
| 176 n = u.naddrs; | |
| 177 | |
| 178 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
| 179 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
| 180 if (peers == NULL) { | |
| 181 return NGX_ERROR; | |
| 182 } | |
| 183 | |
| 1378 | 184 peers->single = (n == 1); |
| 884 | 185 peers->number = n; |
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186 peers->weighted = 0; |
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187 peers->total_weight = n; |
| 884 | 188 peers->name = &us->host; |
| 189 | |
| 190 for (i = 0; i < u.naddrs; i++) { | |
| 1564 | 191 peers->peer[i].sockaddr = u.addrs[i].sockaddr; |
| 192 peers->peer[i].socklen = u.addrs[i].socklen; | |
| 193 peers->peer[i].name = u.addrs[i].name; | |
| 194 peers->peer[i].weight = 1; | |
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195 peers->peer[i].effective_weight = 1; |
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196 peers->peer[i].current_weight = 0; |
| 1564 | 197 peers->peer[i].max_fails = 1; |
| 198 peers->peer[i].fail_timeout = 10; | |
| 884 | 199 } |
| 200 | |
| 201 us->peer.data = peers; | |
| 202 | |
| 1378 | 203 /* implicitly defined upstream has no backup servers */ |
| 204 | |
| 884 | 205 return NGX_OK; |
| 206 } | |
| 207 | |
| 208 | |
| 209 ngx_int_t | |
| 210 ngx_http_upstream_init_round_robin_peer(ngx_http_request_t *r, | |
| 211 ngx_http_upstream_srv_conf_t *us) | |
| 212 { | |
| 213 ngx_uint_t n; | |
| 214 ngx_http_upstream_rr_peer_data_t *rrp; | |
| 215 | |
| 216 rrp = r->upstream->peer.data; | |
| 217 | |
| 218 if (rrp == NULL) { | |
| 219 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t)); | |
| 220 if (rrp == NULL) { | |
| 221 return NGX_ERROR; | |
| 222 } | |
| 223 | |
| 224 r->upstream->peer.data = rrp; | |
| 225 } | |
| 226 | |
| 227 rrp->peers = us->peer.data; | |
| 228 rrp->current = 0; | |
| 229 | |
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230 n = rrp->peers->number; |
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231 |
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232 if (rrp->peers->next && rrp->peers->next->number > n) { |
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233 n = rrp->peers->next->number; |
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234 } |
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235 |
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236 if (n <= 8 * sizeof(uintptr_t)) { |
| 884 | 237 rrp->tried = &rrp->data; |
| 238 rrp->data = 0; | |
| 239 | |
| 240 } else { | |
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241 n = (n + (8 * sizeof(uintptr_t) - 1)) / (8 * sizeof(uintptr_t)); |
| 884 | 242 |
| 243 rrp->tried = ngx_pcalloc(r->pool, n * sizeof(uintptr_t)); | |
| 244 if (rrp->tried == NULL) { | |
| 245 return NGX_ERROR; | |
| 246 } | |
| 247 } | |
| 248 | |
| 249 r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer; | |
| 250 r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer; | |
| 251 r->upstream->peer.tries = rrp->peers->number; | |
| 252 #if (NGX_HTTP_SSL) | |
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253 r->upstream->peer.set_session = |
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254 ngx_http_upstream_set_round_robin_peer_session; |
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255 r->upstream->peer.save_session = |
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256 ngx_http_upstream_save_round_robin_peer_session; |
| 884 | 257 #endif |
| 258 | |
| 259 return NGX_OK; | |
| 260 } | |
| 261 | |
| 262 | |
| 263 ngx_int_t | |
| 1658 | 264 ngx_http_upstream_create_round_robin_peer(ngx_http_request_t *r, |
| 265 ngx_http_upstream_resolved_t *ur) | |
| 266 { | |
| 267 u_char *p; | |
| 268 size_t len; | |
| 269 ngx_uint_t i, n; | |
| 270 struct sockaddr_in *sin; | |
| 271 ngx_http_upstream_rr_peers_t *peers; | |
| 272 ngx_http_upstream_rr_peer_data_t *rrp; | |
| 273 | |
| 274 rrp = r->upstream->peer.data; | |
| 275 | |
| 276 if (rrp == NULL) { | |
| 277 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t)); | |
| 278 if (rrp == NULL) { | |
| 279 return NGX_ERROR; | |
| 280 } | |
| 281 | |
| 282 r->upstream->peer.data = rrp; | |
| 283 } | |
| 284 | |
| 285 peers = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
| 286 + sizeof(ngx_http_upstream_rr_peer_t) * (ur->naddrs - 1)); | |
| 287 if (peers == NULL) { | |
| 288 return NGX_ERROR; | |
| 289 } | |
| 290 | |
| 291 peers->single = (ur->naddrs == 1); | |
| 292 peers->number = ur->naddrs; | |
| 293 peers->name = &ur->host; | |
| 294 | |
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295 if (ur->sockaddr) { |
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296 peers->peer[0].sockaddr = ur->sockaddr; |
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297 peers->peer[0].socklen = ur->socklen; |
|
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298 peers->peer[0].name = ur->host; |
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299 peers->peer[0].weight = 1; |
|
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300 peers->peer[0].effective_weight = 1; |
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301 peers->peer[0].current_weight = 0; |
|
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302 peers->peer[0].max_fails = 1; |
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303 peers->peer[0].fail_timeout = 10; |
| 1658 | 304 |
|
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305 } else { |
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306 |
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307 for (i = 0; i < ur->naddrs; i++) { |
| 1658 | 308 |
|
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309 len = NGX_INET_ADDRSTRLEN + sizeof(":65536") - 1; |
|
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310 |
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311 p = ngx_pnalloc(r->pool, len); |
|
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312 if (p == NULL) { |
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313 return NGX_ERROR; |
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314 } |
| 1658 | 315 |
|
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316 len = ngx_inet_ntop(AF_INET, &ur->addrs[i], p, NGX_INET_ADDRSTRLEN); |
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317 len = ngx_sprintf(&p[len], ":%d", ur->port) - p; |
| 1658 | 318 |
|
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319 sin = ngx_pcalloc(r->pool, sizeof(struct sockaddr_in)); |
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320 if (sin == NULL) { |
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321 return NGX_ERROR; |
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322 } |
| 1658 | 323 |
|
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324 sin->sin_family = AF_INET; |
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325 sin->sin_port = htons(ur->port); |
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326 sin->sin_addr.s_addr = ur->addrs[i]; |
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327 |
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328 peers->peer[i].sockaddr = (struct sockaddr *) sin; |
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329 peers->peer[i].socklen = sizeof(struct sockaddr_in); |
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330 peers->peer[i].name.len = len; |
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331 peers->peer[i].name.data = p; |
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332 peers->peer[i].weight = 1; |
|
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333 peers->peer[i].effective_weight = 1; |
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334 peers->peer[i].current_weight = 0; |
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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 ngx_int_t rc; |
| 375 ngx_uint_t i, n; | |
| 376 ngx_connection_t *c; | |
| 377 ngx_http_upstream_rr_peer_t *peer; | |
| 378 ngx_http_upstream_rr_peers_t *peers; | |
| 884 | 379 |
| 380 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
| 381 "get rr peer, try: %ui", pc->tries); | |
| 382 | |
| 383 /* ngx_lock_mutex(rrp->peers->mutex); */ | |
| 384 | |
| 385 if (rrp->peers->last_cached) { | |
| 386 | |
| 387 /* cached connection */ | |
| 388 | |
| 389 c = rrp->peers->cached[rrp->peers->last_cached]; | |
| 390 rrp->peers->last_cached--; | |
| 391 | |
| 392 /* ngx_unlock_mutex(ppr->peers->mutex); */ | |
| 393 | |
| 394 #if (NGX_THREADS) | |
| 395 c->read->lock = c->read->own_lock; | |
| 396 c->write->lock = c->write->own_lock; | |
| 397 #endif | |
| 398 | |
| 399 pc->connection = c; | |
| 400 pc->cached = 1; | |
| 401 | |
| 402 return NGX_OK; | |
| 403 } | |
| 404 | |
| 405 pc->cached = 0; | |
| 406 pc->connection = NULL; | |
| 407 | |
| 1378 | 408 if (rrp->peers->single) { |
| 884 | 409 peer = &rrp->peers->peer[0]; |
| 410 | |
|
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dcb853acae97
Upstream: honor the "down" flag for a single server.
Ruslan Ermilov <ru@nginx.com>
parents:
4655
diff
changeset
|
411 if (peer->down) { |
|
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|
412 goto failed; |
|
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|
413 } |
|
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|
414 |
| 884 | 415 } else { |
| 416 | |
| 417 /* there are several peers */ | |
| 418 | |
|
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diff
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|
419 peer = ngx_http_upstream_get_peer(rrp); |
| 884 | 420 |
|
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|
421 if (peer == NULL) { |
|
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diff
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|
422 goto failed; |
| 884 | 423 } |
| 424 | |
|
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|
425 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
|
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|
426 "get rr peer, current: %ui %i", |
|
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diff
changeset
|
427 rrp->current, peer->current_weight); |
| 884 | 428 } |
| 429 | |
| 430 pc->sockaddr = peer->sockaddr; | |
| 431 pc->socklen = peer->socklen; | |
| 432 pc->name = &peer->name; | |
| 433 | |
| 434 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
| 435 | |
| 1378 | 436 if (pc->tries == 1 && rrp->peers->next) { |
| 437 pc->tries += rrp->peers->next->number; | |
| 438 } | |
| 439 | |
| 884 | 440 return NGX_OK; |
| 441 | |
| 442 failed: | |
| 443 | |
| 1378 | 444 peers = rrp->peers; |
| 445 | |
| 446 if (peers->next) { | |
| 447 | |
| 448 /* ngx_unlock_mutex(peers->mutex); */ | |
| 449 | |
| 450 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, pc->log, 0, "backup servers"); | |
| 451 | |
| 452 rrp->peers = peers->next; | |
| 453 pc->tries = rrp->peers->number; | |
| 454 | |
|
4991
a384c60d55f3
Upstream: fixed state resetting when switching to backup servers.
Valentin Bartenev <vbart@nginx.com>
parents:
4914
diff
changeset
|
455 n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1)) |
|
a384c60d55f3
Upstream: fixed state resetting when switching to backup servers.
Valentin Bartenev <vbart@nginx.com>
parents:
4914
diff
changeset
|
456 / (8 * sizeof(uintptr_t)); |
|
a384c60d55f3
Upstream: fixed state resetting when switching to backup servers.
Valentin Bartenev <vbart@nginx.com>
parents:
4914
diff
changeset
|
457 |
| 1389 | 458 for (i = 0; i < n; i++) { |
| 1378 | 459 rrp->tried[i] = 0; |
| 460 } | |
| 461 | |
| 462 rc = ngx_http_upstream_get_round_robin_peer(pc, rrp); | |
| 463 | |
| 464 if (rc != NGX_BUSY) { | |
| 465 return rc; | |
| 466 } | |
| 467 | |
| 468 /* ngx_lock_mutex(peers->mutex); */ | |
| 469 } | |
| 470 | |
| 884 | 471 /* all peers failed, mark them as live for quick recovery */ |
| 472 | |
| 1378 | 473 for (i = 0; i < peers->number; i++) { |
| 474 peers->peer[i].fails = 0; | |
| 884 | 475 } |
| 476 | |
| 1378 | 477 /* ngx_unlock_mutex(peers->mutex); */ |
| 884 | 478 |
| 1378 | 479 pc->name = peers->name; |
| 884 | 480 |
| 481 return NGX_BUSY; | |
| 482 } | |
| 483 | |
| 484 | |
|
4621
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Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
485 static ngx_http_upstream_rr_peer_t * |
|
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Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
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4569
diff
changeset
|
486 ngx_http_upstream_get_peer(ngx_http_upstream_rr_peer_data_t *rrp) |
|
1344
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fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
487 { |
|
4621
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Upstream: smooth weighted round-robin balancing.
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diff
changeset
|
488 time_t now; |
|
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Upstream: smooth weighted round-robin balancing.
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diff
changeset
|
489 uintptr_t m; |
|
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Upstream: smooth weighted round-robin balancing.
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diff
changeset
|
490 ngx_int_t total; |
|
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Upstream: smooth weighted round-robin balancing.
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diff
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|
491 ngx_uint_t i, n; |
|
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Upstream: smooth weighted round-robin balancing.
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|
492 ngx_http_upstream_rr_peer_t *peer, *best; |
|
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fair upstream weight balancer
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diff
changeset
|
493 |
|
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Upstream: smooth weighted round-robin balancing.
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|
494 now = ngx_time(); |
|
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diff
changeset
|
495 |
|
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|
496 best = NULL; |
|
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Upstream: smooth weighted round-robin balancing.
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|
497 total = 0; |
|
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fair upstream weight balancer
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diff
changeset
|
498 |
|
4621
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Upstream: smooth weighted round-robin balancing.
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parents:
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diff
changeset
|
499 for (i = 0; i < rrp->peers->number; i++) { |
|
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fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
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1284
diff
changeset
|
500 |
|
4621
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Upstream: smooth weighted round-robin balancing.
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diff
changeset
|
501 n = i / (8 * sizeof(uintptr_t)); |
|
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Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
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diff
changeset
|
502 m = (uintptr_t) 1 << i % (8 * sizeof(uintptr_t)); |
|
1344
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fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
503 |
|
4621
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Upstream: smooth weighted round-robin balancing.
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diff
changeset
|
504 if (rrp->tried[n] & m) { |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
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diff
changeset
|
505 continue; |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
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diff
changeset
|
506 } |
|
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fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
507 |
|
4621
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Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
508 peer = &rrp->peers->peer[i]; |
|
1344
8f5b5641966c
fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
509 |
|
4621
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Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
510 if (peer->down) { |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
511 continue; |
|
1344
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fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
512 } |
|
8f5b5641966c
fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
513 |
|
4621
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Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
514 if (peer->max_fails |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
515 && peer->fails >= peer->max_fails |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
516 && now - peer->checked <= peer->fail_timeout) |
|
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
517 { |
|
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518 continue; |
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519 } |
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520 |
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521 peer->current_weight += peer->effective_weight; |
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522 total += peer->effective_weight; |
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523 |
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524 if (peer->effective_weight < peer->weight) { |
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525 peer->effective_weight++; |
|
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526 } |
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527 |
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528 if (best == NULL || peer->current_weight > best->current_weight) { |
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529 best = peer; |
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530 } |
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531 } |
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532 |
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533 if (best == NULL) { |
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534 return NULL; |
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535 } |
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536 |
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537 i = best - &rrp->peers->peer[0]; |
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538 |
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539 rrp->current = i; |
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540 |
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541 n = i / (8 * sizeof(uintptr_t)); |
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542 m = (uintptr_t) 1 << i % (8 * sizeof(uintptr_t)); |
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543 |
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544 rrp->tried[n] |= m; |
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545 |
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546 best->current_weight -= total; |
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547 best->checked = now; |
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548 |
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549 return best; |
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550 } |
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551 |
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552 |
| 884 | 553 void |
| 554 ngx_http_upstream_free_round_robin_peer(ngx_peer_connection_t *pc, void *data, | |
| 555 ngx_uint_t state) | |
| 556 { | |
| 557 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
| 558 | |
| 559 time_t now; | |
| 560 ngx_http_upstream_rr_peer_t *peer; | |
| 561 | |
| 562 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
| 563 "free rr peer %ui %ui", pc->tries, state); | |
| 564 | |
| 565 /* TODO: NGX_PEER_KEEPALIVE */ | |
| 566 | |
| 1378 | 567 if (rrp->peers->single) { |
| 884 | 568 pc->tries = 0; |
| 569 return; | |
| 570 } | |
| 571 | |
|
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572 peer = &rrp->peers->peer[rrp->current]; |
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573 |
| 884 | 574 if (state & NGX_PEER_FAILED) { |
| 575 now = ngx_time(); | |
| 576 | |
| 577 /* ngx_lock_mutex(rrp->peers->mutex); */ | |
| 578 | |
| 579 peer->fails++; | |
| 580 peer->accessed = now; | |
|
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581 peer->checked = now; |
| 884 | 582 |
|
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|
583 if (peer->max_fails) { |
|
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|
584 peer->effective_weight -= peer->weight / peer->max_fails; |
|
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585 } |
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586 |
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587 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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588 "free rr peer failed: %ui %i", |
|
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|
589 rrp->current, peer->effective_weight); |
|
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|
590 |
|
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591 if (peer->effective_weight < 0) { |
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|
592 peer->effective_weight = 0; |
| 884 | 593 } |
| 594 | |
| 595 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
|
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|
596 |
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|
597 } else { |
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|
598 |
|
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|
599 /* mark peer live if check passed */ |
|
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|
600 |
|
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|
601 if (peer->accessed < peer->checked) { |
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|
602 peer->fails = 0; |
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|
603 } |
| 884 | 604 } |
| 605 | |
| 606 if (pc->tries) { | |
| 607 pc->tries--; | |
| 608 } | |
| 609 | |
| 610 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
| 611 } | |
| 612 | |
| 613 | |
| 614 #if (NGX_HTTP_SSL) | |
| 615 | |
|
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|
616 ngx_int_t |
|
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617 ngx_http_upstream_set_round_robin_peer_session(ngx_peer_connection_t *pc, |
|
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618 void *data) |
| 884 | 619 { |
| 620 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
| 621 | |
|
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|
622 ngx_int_t rc; |
| 884 | 623 ngx_ssl_session_t *ssl_session; |
| 624 ngx_http_upstream_rr_peer_t *peer; | |
| 625 | |
|
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|
626 peer = &rrp->peers->peer[rrp->current]; |
|
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|
627 |
|
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changeset
|
628 /* TODO: threads only mutex */ |
|
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fix segfault when session was freed twice
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|
629 /* ngx_lock_mutex(rrp->peers->mutex); */ |
|
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changeset
|
630 |
|
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changeset
|
631 ssl_session = peer->ssl_session; |
|
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|
632 |
|
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changeset
|
633 rc = ngx_ssl_set_session(pc->connection, ssl_session); |
|
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|
634 |
|
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changeset
|
635 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
| 1443 | 636 "set session: %p:%d", |
| 637 ssl_session, ssl_session ? ssl_session->references : 0); | |
|
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|
638 |
|
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changeset
|
639 /* ngx_unlock_mutex(rrp->peers->mutex); */ |
|
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|
640 |
|
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|
641 return rc; |
|
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|
642 } |
|
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changeset
|
643 |
|
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Igor Sysoev <igor@sysoev.ru>
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changeset
|
644 |
|
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changeset
|
645 void |
|
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changeset
|
646 ngx_http_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc, |
|
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|
647 void *data) |
|
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|
648 { |
|
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changeset
|
649 ngx_http_upstream_rr_peer_data_t *rrp = data; |
|
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|
650 |
|
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changeset
|
651 ngx_ssl_session_t *old_ssl_session, *ssl_session; |
|
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changeset
|
652 ngx_http_upstream_rr_peer_t *peer; |
|
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changeset
|
653 |
| 884 | 654 ssl_session = ngx_ssl_get_session(pc->connection); |
| 655 | |
| 656 if (ssl_session == NULL) { | |
| 657 return; | |
| 658 } | |
| 659 | |
|
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changeset
|
660 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
| 1443 | 661 "save session: %p:%d", ssl_session, ssl_session->references); |
|
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|
662 |
| 884 | 663 peer = &rrp->peers->peer[rrp->current]; |
| 664 | |
|
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changeset
|
665 /* TODO: threads only mutex */ |
| 884 | 666 /* ngx_lock_mutex(rrp->peers->mutex); */ |
|
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changeset
|
667 |
|
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changeset
|
668 old_ssl_session = peer->ssl_session; |
| 884 | 669 peer->ssl_session = ssl_session; |
|
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|
670 |
| 884 | 671 /* ngx_unlock_mutex(rrp->peers->mutex); */ |
| 672 | |
|
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|
673 if (old_ssl_session) { |
|
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changeset
|
674 |
|
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changeset
|
675 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
| 1443 | 676 "old session: %p:%d", |
|
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changeset
|
677 old_ssl_session, old_ssl_session->references); |
|
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changeset
|
678 |
| 884 | 679 /* TODO: may block */ |
|
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changeset
|
680 |
|
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changeset
|
681 ngx_ssl_free_session(old_ssl_session); |
| 884 | 682 } |
| 683 } | |
| 684 | |
|
3964
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do not try to reuse and save a SSL session for a peer created on the fly
Igor Sysoev <igor@sysoev.ru>
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changeset
|
685 |
|
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do not try to reuse and save a SSL session for a peer created on the fly
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changeset
|
686 static ngx_int_t |
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ff127ba3b091
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parents:
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687 ngx_http_upstream_empty_set_session(ngx_peer_connection_t *pc, void *data) |
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parents:
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688 { |
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ff127ba3b091
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Igor Sysoev <igor@sysoev.ru>
parents:
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689 return NGX_OK; |
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ff127ba3b091
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Igor Sysoev <igor@sysoev.ru>
parents:
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690 } |
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ff127ba3b091
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Igor Sysoev <igor@sysoev.ru>
parents:
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691 |
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Igor Sysoev <igor@sysoev.ru>
parents:
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692 |
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ff127ba3b091
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Igor Sysoev <igor@sysoev.ru>
parents:
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693 static void |
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ff127ba3b091
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Igor Sysoev <igor@sysoev.ru>
parents:
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694 ngx_http_upstream_empty_save_session(ngx_peer_connection_t *pc, void *data) |
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ff127ba3b091
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Igor Sysoev <igor@sysoev.ru>
parents:
2422
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695 { |
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ff127ba3b091
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Igor Sysoev <igor@sysoev.ru>
parents:
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696 return; |
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ff127ba3b091
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Igor Sysoev <igor@sysoev.ru>
parents:
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697 } |
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ff127ba3b091
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Igor Sysoev <igor@sysoev.ru>
parents:
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698 |
| 884 | 699 #endif |