Mercurial > hg > nginx-quic
annotate src/http/ngx_http_upstream_round_robin.c @ 4939:41bf14321133
Gunzip: added missing ngx_http_clear_etag().
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Mon, 26 Nov 2012 21:30:45 +0000 |
parents | dcb853acae97 |
children | a384c60d55f3 |
rev | line source |
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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_http_upstream_rr_peer_t *ngx_http_upstream_get_peer( |
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16 ngx_http_upstream_rr_peer_data_t *rrp); |
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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; | |
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33 ngx_uint_t i, j, n, w; |
884 | 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; |
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43 w = 0; |
1378 | 44 |
884 | 45 for (i = 0; i < us->servers->nelts; i++) { |
1378 | 46 if (server[i].backup) { |
47 continue; | |
48 } | |
49 | |
884 | 50 n += server[i].naddrs; |
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51 w += server[i].naddrs * server[i].weight; |
884 | 52 } |
53 | |
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54 if (n == 0) { |
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55 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, |
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56 "no servers in upstream \"%V\" in %s:%ui", |
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57 &us->host, us->file_name, us->line); |
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58 return NGX_ERROR; |
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59 } |
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60 |
884 | 61 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) |
62 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
63 if (peers == NULL) { | |
64 return NGX_ERROR; | |
65 } | |
66 | |
1378 | 67 peers->single = (n == 1); |
884 | 68 peers->number = n; |
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69 peers->weighted = (w != n); |
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70 peers->total_weight = w; |
884 | 71 peers->name = &us->host; |
72 | |
73 n = 0; | |
74 | |
75 for (i = 0; i < us->servers->nelts; i++) { | |
76 for (j = 0; j < server[i].naddrs; j++) { | |
1378 | 77 if (server[i].backup) { |
78 continue; | |
79 } | |
80 | |
884 | 81 peers->peer[n].sockaddr = server[i].addrs[j].sockaddr; |
82 peers->peer[n].socklen = server[i].addrs[j].socklen; | |
83 peers->peer[n].name = server[i].addrs[j].name; | |
84 peers->peer[n].max_fails = server[i].max_fails; | |
85 peers->peer[n].fail_timeout = server[i].fail_timeout; | |
86 peers->peer[n].down = server[i].down; | |
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87 peers->peer[n].weight = server[i].weight; |
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88 peers->peer[n].effective_weight = server[i].weight; |
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89 peers->peer[n].current_weight = 0; |
884 | 90 n++; |
91 } | |
92 } | |
93 | |
94 us->peer.data = peers; | |
95 | |
1379 | 96 ngx_sort(&peers->peer[0], (size_t) n, |
97 sizeof(ngx_http_upstream_rr_peer_t), | |
98 ngx_http_upstream_cmp_servers); | |
99 | |
1378 | 100 /* backup servers */ |
101 | |
102 n = 0; | |
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103 w = 0; |
1378 | 104 |
105 for (i = 0; i < us->servers->nelts; i++) { | |
106 if (!server[i].backup) { | |
107 continue; | |
108 } | |
109 | |
110 n += server[i].naddrs; | |
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111 w += server[i].naddrs * server[i].weight; |
1378 | 112 } |
113 | |
114 if (n == 0) { | |
115 return NGX_OK; | |
116 } | |
117 | |
118 backup = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
119 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
120 if (backup == NULL) { | |
121 return NGX_ERROR; | |
122 } | |
123 | |
124 peers->single = 0; | |
125 backup->single = 0; | |
126 backup->number = n; | |
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127 backup->weighted = (w != n); |
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128 backup->total_weight = w; |
1378 | 129 backup->name = &us->host; |
130 | |
131 n = 0; | |
132 | |
133 for (i = 0; i < us->servers->nelts; i++) { | |
134 for (j = 0; j < server[i].naddrs; j++) { | |
135 if (!server[i].backup) { | |
136 continue; | |
137 } | |
138 | |
139 backup->peer[n].sockaddr = server[i].addrs[j].sockaddr; | |
140 backup->peer[n].socklen = server[i].addrs[j].socklen; | |
141 backup->peer[n].name = server[i].addrs[j].name; | |
142 backup->peer[n].weight = server[i].weight; | |
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143 backup->peer[n].effective_weight = server[i].weight; |
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144 backup->peer[n].current_weight = 0; |
1378 | 145 backup->peer[n].max_fails = server[i].max_fails; |
146 backup->peer[n].fail_timeout = server[i].fail_timeout; | |
147 backup->peer[n].down = server[i].down; | |
148 n++; | |
149 } | |
150 } | |
151 | |
152 peers->next = backup; | |
153 | |
1379 | 154 ngx_sort(&backup->peer[0], (size_t) n, |
155 sizeof(ngx_http_upstream_rr_peer_t), | |
156 ngx_http_upstream_cmp_servers); | |
157 | |
884 | 158 return NGX_OK; |
159 } | |
160 | |
161 | |
162 /* an upstream implicitly defined by proxy_pass, etc. */ | |
163 | |
906 | 164 if (us->port == 0 && us->default_port == 0) { |
165 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, | |
166 "no port in upstream \"%V\" in %s:%ui", | |
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167 &us->host, us->file_name, us->line); |
906 | 168 return NGX_ERROR; |
169 } | |
170 | |
884 | 171 ngx_memzero(&u, sizeof(ngx_url_t)); |
172 | |
173 u.host = us->host; | |
916 | 174 u.port = (in_port_t) (us->port ? us->port : us->default_port); |
884 | 175 |
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176 if (ngx_inet_resolve_host(cf->pool, &u) != NGX_OK) { |
884 | 177 if (u.err) { |
178 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, | |
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179 "%s in upstream \"%V\" in %s:%ui", |
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180 u.err, &us->host, us->file_name, us->line); |
884 | 181 } |
182 | |
183 return NGX_ERROR; | |
184 } | |
185 | |
186 n = u.naddrs; | |
187 | |
188 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
189 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
190 if (peers == NULL) { | |
191 return NGX_ERROR; | |
192 } | |
193 | |
1378 | 194 peers->single = (n == 1); |
884 | 195 peers->number = n; |
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196 peers->weighted = 0; |
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197 peers->total_weight = n; |
884 | 198 peers->name = &us->host; |
199 | |
200 for (i = 0; i < u.naddrs; i++) { | |
1564 | 201 peers->peer[i].sockaddr = u.addrs[i].sockaddr; |
202 peers->peer[i].socklen = u.addrs[i].socklen; | |
203 peers->peer[i].name = u.addrs[i].name; | |
204 peers->peer[i].weight = 1; | |
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205 peers->peer[i].effective_weight = 1; |
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206 peers->peer[i].current_weight = 0; |
1564 | 207 peers->peer[i].max_fails = 1; |
208 peers->peer[i].fail_timeout = 10; | |
884 | 209 } |
210 | |
211 us->peer.data = peers; | |
212 | |
1378 | 213 /* implicitly defined upstream has no backup servers */ |
214 | |
884 | 215 return NGX_OK; |
216 } | |
217 | |
218 | |
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219 static ngx_int_t |
1379 | 220 ngx_http_upstream_cmp_servers(const void *one, const void *two) |
221 { | |
222 ngx_http_upstream_rr_peer_t *first, *second; | |
223 | |
224 first = (ngx_http_upstream_rr_peer_t *) one; | |
225 second = (ngx_http_upstream_rr_peer_t *) two; | |
226 | |
227 return (first->weight < second->weight); | |
228 } | |
229 | |
230 | |
884 | 231 ngx_int_t |
232 ngx_http_upstream_init_round_robin_peer(ngx_http_request_t *r, | |
233 ngx_http_upstream_srv_conf_t *us) | |
234 { | |
235 ngx_uint_t n; | |
236 ngx_http_upstream_rr_peer_data_t *rrp; | |
237 | |
238 rrp = r->upstream->peer.data; | |
239 | |
240 if (rrp == NULL) { | |
241 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t)); | |
242 if (rrp == NULL) { | |
243 return NGX_ERROR; | |
244 } | |
245 | |
246 r->upstream->peer.data = rrp; | |
247 } | |
248 | |
249 rrp->peers = us->peer.data; | |
250 rrp->current = 0; | |
251 | |
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252 n = rrp->peers->number; |
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253 |
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254 if (rrp->peers->next && rrp->peers->next->number > n) { |
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255 n = rrp->peers->next->number; |
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256 } |
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257 |
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258 if (n <= 8 * sizeof(uintptr_t)) { |
884 | 259 rrp->tried = &rrp->data; |
260 rrp->data = 0; | |
261 | |
262 } else { | |
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263 n = (n + (8 * sizeof(uintptr_t) - 1)) / (8 * sizeof(uintptr_t)); |
884 | 264 |
265 rrp->tried = ngx_pcalloc(r->pool, n * sizeof(uintptr_t)); | |
266 if (rrp->tried == NULL) { | |
267 return NGX_ERROR; | |
268 } | |
269 } | |
270 | |
271 r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer; | |
272 r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer; | |
273 r->upstream->peer.tries = rrp->peers->number; | |
274 #if (NGX_HTTP_SSL) | |
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275 r->upstream->peer.set_session = |
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276 ngx_http_upstream_set_round_robin_peer_session; |
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277 r->upstream->peer.save_session = |
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278 ngx_http_upstream_save_round_robin_peer_session; |
884 | 279 #endif |
280 | |
281 return NGX_OK; | |
282 } | |
283 | |
284 | |
285 ngx_int_t | |
1658 | 286 ngx_http_upstream_create_round_robin_peer(ngx_http_request_t *r, |
287 ngx_http_upstream_resolved_t *ur) | |
288 { | |
289 u_char *p; | |
290 size_t len; | |
291 ngx_uint_t i, n; | |
292 struct sockaddr_in *sin; | |
293 ngx_http_upstream_rr_peers_t *peers; | |
294 ngx_http_upstream_rr_peer_data_t *rrp; | |
295 | |
296 rrp = r->upstream->peer.data; | |
297 | |
298 if (rrp == NULL) { | |
299 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t)); | |
300 if (rrp == NULL) { | |
301 return NGX_ERROR; | |
302 } | |
303 | |
304 r->upstream->peer.data = rrp; | |
305 } | |
306 | |
307 peers = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
308 + sizeof(ngx_http_upstream_rr_peer_t) * (ur->naddrs - 1)); | |
309 if (peers == NULL) { | |
310 return NGX_ERROR; | |
311 } | |
312 | |
313 peers->single = (ur->naddrs == 1); | |
314 peers->number = ur->naddrs; | |
315 peers->name = &ur->host; | |
316 | |
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317 if (ur->sockaddr) { |
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318 peers->peer[0].sockaddr = ur->sockaddr; |
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319 peers->peer[0].socklen = ur->socklen; |
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320 peers->peer[0].name = ur->host; |
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321 peers->peer[0].weight = 1; |
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322 peers->peer[0].effective_weight = 1; |
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323 peers->peer[0].current_weight = 0; |
2422
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324 peers->peer[0].max_fails = 1; |
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325 peers->peer[0].fail_timeout = 10; |
1658 | 326 |
2422
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327 } else { |
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328 |
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329 for (i = 0; i < ur->naddrs; i++) { |
1658 | 330 |
2422
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331 len = NGX_INET_ADDRSTRLEN + sizeof(":65536") - 1; |
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332 |
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333 p = ngx_pnalloc(r->pool, len); |
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334 if (p == NULL) { |
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335 return NGX_ERROR; |
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336 } |
1658 | 337 |
2422
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338 len = ngx_inet_ntop(AF_INET, &ur->addrs[i], p, NGX_INET_ADDRSTRLEN); |
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339 len = ngx_sprintf(&p[len], ":%d", ur->port) - p; |
1658 | 340 |
2422
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341 sin = ngx_pcalloc(r->pool, sizeof(struct sockaddr_in)); |
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342 if (sin == NULL) { |
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343 return NGX_ERROR; |
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344 } |
1658 | 345 |
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346 sin->sin_family = AF_INET; |
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347 sin->sin_port = htons(ur->port); |
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348 sin->sin_addr.s_addr = ur->addrs[i]; |
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349 |
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350 peers->peer[i].sockaddr = (struct sockaddr *) sin; |
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351 peers->peer[i].socklen = sizeof(struct sockaddr_in); |
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352 peers->peer[i].name.len = len; |
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353 peers->peer[i].name.data = p; |
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354 peers->peer[i].weight = 1; |
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355 peers->peer[i].effective_weight = 1; |
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356 peers->peer[i].current_weight = 0; |
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357 peers->peer[i].max_fails = 1; |
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358 peers->peer[i].fail_timeout = 10; |
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359 } |
1658 | 360 } |
361 | |
362 rrp->peers = peers; | |
363 rrp->current = 0; | |
364 | |
365 if (rrp->peers->number <= 8 * sizeof(uintptr_t)) { | |
366 rrp->tried = &rrp->data; | |
367 rrp->data = 0; | |
368 | |
369 } else { | |
370 n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1)) | |
371 / (8 * sizeof(uintptr_t)); | |
372 | |
373 rrp->tried = ngx_pcalloc(r->pool, n * sizeof(uintptr_t)); | |
374 if (rrp->tried == NULL) { | |
375 return NGX_ERROR; | |
376 } | |
377 } | |
378 | |
379 r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer; | |
380 r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer; | |
381 r->upstream->peer.tries = rrp->peers->number; | |
382 #if (NGX_HTTP_SSL) | |
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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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383 r->upstream->peer.set_session = ngx_http_upstream_empty_set_session; |
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384 r->upstream->peer.save_session = ngx_http_upstream_empty_save_session; |
1658 | 385 #endif |
386 | |
387 return NGX_OK; | |
388 } | |
389 | |
390 | |
391 ngx_int_t | |
884 | 392 ngx_http_upstream_get_round_robin_peer(ngx_peer_connection_t *pc, void *data) |
393 { | |
394 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
395 | |
1378 | 396 ngx_int_t rc; |
397 ngx_uint_t i, n; | |
398 ngx_connection_t *c; | |
399 ngx_http_upstream_rr_peer_t *peer; | |
400 ngx_http_upstream_rr_peers_t *peers; | |
884 | 401 |
402 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
403 "get rr peer, try: %ui", pc->tries); | |
404 | |
405 /* ngx_lock_mutex(rrp->peers->mutex); */ | |
406 | |
407 if (rrp->peers->last_cached) { | |
408 | |
409 /* cached connection */ | |
410 | |
411 c = rrp->peers->cached[rrp->peers->last_cached]; | |
412 rrp->peers->last_cached--; | |
413 | |
414 /* ngx_unlock_mutex(ppr->peers->mutex); */ | |
415 | |
416 #if (NGX_THREADS) | |
417 c->read->lock = c->read->own_lock; | |
418 c->write->lock = c->write->own_lock; | |
419 #endif | |
420 | |
421 pc->connection = c; | |
422 pc->cached = 1; | |
423 | |
424 return NGX_OK; | |
425 } | |
426 | |
427 pc->cached = 0; | |
428 pc->connection = NULL; | |
429 | |
1378 | 430 if (rrp->peers->single) { |
884 | 431 peer = &rrp->peers->peer[0]; |
432 | |
4914
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Upstream: honor the "down" flag for a single server.
Ruslan Ermilov <ru@nginx.com>
parents:
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|
433 if (peer->down) { |
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434 goto failed; |
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435 } |
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|
436 |
884 | 437 } else { |
438 | |
439 /* there are several peers */ | |
440 | |
4621
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441 peer = ngx_http_upstream_get_peer(rrp); |
884 | 442 |
4621
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443 if (peer == NULL) { |
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444 goto failed; |
884 | 445 } |
446 | |
4621
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447 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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448 "get rr peer, current: %ui %i", |
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|
449 rrp->current, peer->current_weight); |
884 | 450 } |
451 | |
452 pc->sockaddr = peer->sockaddr; | |
453 pc->socklen = peer->socklen; | |
454 pc->name = &peer->name; | |
455 | |
456 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
457 | |
1378 | 458 if (pc->tries == 1 && rrp->peers->next) { |
459 pc->tries += rrp->peers->next->number; | |
460 } | |
461 | |
884 | 462 return NGX_OK; |
463 | |
464 failed: | |
465 | |
1378 | 466 peers = rrp->peers; |
467 | |
468 if (peers->next) { | |
469 | |
470 /* ngx_unlock_mutex(peers->mutex); */ | |
471 | |
472 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, pc->log, 0, "backup servers"); | |
473 | |
474 rrp->peers = peers->next; | |
475 pc->tries = rrp->peers->number; | |
476 | |
477 n = rrp->peers->number / (8 * sizeof(uintptr_t)) + 1; | |
1389 | 478 for (i = 0; i < n; i++) { |
1378 | 479 rrp->tried[i] = 0; |
480 } | |
481 | |
482 rc = ngx_http_upstream_get_round_robin_peer(pc, rrp); | |
483 | |
484 if (rc != NGX_BUSY) { | |
485 return rc; | |
486 } | |
487 | |
488 /* ngx_lock_mutex(peers->mutex); */ | |
489 } | |
490 | |
884 | 491 /* all peers failed, mark them as live for quick recovery */ |
492 | |
1378 | 493 for (i = 0; i < peers->number; i++) { |
494 peers->peer[i].fails = 0; | |
884 | 495 } |
496 | |
1378 | 497 /* ngx_unlock_mutex(peers->mutex); */ |
884 | 498 |
1378 | 499 pc->name = peers->name; |
884 | 500 |
501 return NGX_BUSY; | |
502 } | |
503 | |
504 | |
4621
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Upstream: smooth weighted round-robin balancing.
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4569
diff
changeset
|
505 static ngx_http_upstream_rr_peer_t * |
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diff
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|
506 ngx_http_upstream_get_peer(ngx_http_upstream_rr_peer_data_t *rrp) |
1344
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fair upstream weight balancer
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diff
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|
507 { |
4621
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Upstream: smooth weighted round-robin balancing.
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diff
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|
508 time_t now; |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
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|
509 uintptr_t m; |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
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diff
changeset
|
510 ngx_int_t total; |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
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diff
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|
511 ngx_uint_t i, n; |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
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diff
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|
512 ngx_http_upstream_rr_peer_t *peer, *best; |
1344
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fair upstream weight balancer
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diff
changeset
|
513 |
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
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diff
changeset
|
514 now = ngx_time(); |
1344
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fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
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1284
diff
changeset
|
515 |
4621
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Upstream: smooth weighted round-robin balancing.
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diff
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|
516 best = NULL; |
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Upstream: smooth weighted round-robin balancing.
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|
517 total = 0; |
1344
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fair upstream weight balancer
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diff
changeset
|
518 |
4621
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Upstream: smooth weighted round-robin balancing.
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diff
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|
519 for (i = 0; i < rrp->peers->number; i++) { |
1344
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fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
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diff
changeset
|
520 |
4621
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diff
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|
521 n = i / (8 * sizeof(uintptr_t)); |
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Upstream: smooth weighted round-robin balancing.
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|
522 m = (uintptr_t) 1 << i % (8 * sizeof(uintptr_t)); |
1344
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fair upstream weight balancer
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diff
changeset
|
523 |
4621
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Upstream: smooth weighted round-robin balancing.
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|
524 if (rrp->tried[n] & m) { |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
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diff
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|
525 continue; |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
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diff
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|
526 } |
1344
8f5b5641966c
fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
527 |
4621
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Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
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4569
diff
changeset
|
528 peer = &rrp->peers->peer[i]; |
1344
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diff
changeset
|
529 |
4621
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Upstream: smooth weighted round-robin balancing.
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parents:
4569
diff
changeset
|
530 if (peer->down) { |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
531 continue; |
1344
8f5b5641966c
fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
532 } |
8f5b5641966c
fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
533 |
4621
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Upstream: smooth weighted round-robin balancing.
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diff
changeset
|
534 if (peer->max_fails |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
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diff
changeset
|
535 && peer->fails >= peer->max_fails |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
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diff
changeset
|
536 && now - peer->checked <= peer->fail_timeout) |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
537 { |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
538 continue; |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
539 } |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
540 |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
541 peer->current_weight += peer->effective_weight; |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
542 total += peer->effective_weight; |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
543 |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
544 if (peer->effective_weight < peer->weight) { |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
545 peer->effective_weight++; |
4010
74a93d3fdd85
Fixing cpu hog with all upstream servers marked "down".
Maxim Dounin <mdounin@mdounin.ru>
parents:
3964
diff
changeset
|
546 } |
74a93d3fdd85
Fixing cpu hog with all upstream servers marked "down".
Maxim Dounin <mdounin@mdounin.ru>
parents:
3964
diff
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|
547 |
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548 if (best == NULL || peer->current_weight > best->current_weight) { |
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549 best = peer; |
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550 } |
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551 } |
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552 |
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553 if (best == NULL) { |
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554 return NULL; |
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555 } |
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556 |
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557 i = best - &rrp->peers->peer[0]; |
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558 |
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559 rrp->current = i; |
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560 |
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561 n = i / (8 * sizeof(uintptr_t)); |
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562 m = (uintptr_t) 1 << i % (8 * sizeof(uintptr_t)); |
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563 |
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564 rrp->tried[n] |= m; |
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565 |
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566 best->current_weight -= total; |
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567 best->checked = now; |
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568 |
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569 return best; |
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570 } |
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571 |
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572 |
884 | 573 void |
574 ngx_http_upstream_free_round_robin_peer(ngx_peer_connection_t *pc, void *data, | |
575 ngx_uint_t state) | |
576 { | |
577 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
578 | |
579 time_t now; | |
580 ngx_http_upstream_rr_peer_t *peer; | |
581 | |
582 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
583 "free rr peer %ui %ui", pc->tries, state); | |
584 | |
585 if (state == 0 && pc->tries == 0) { | |
586 return; | |
587 } | |
588 | |
589 /* TODO: NGX_PEER_KEEPALIVE */ | |
590 | |
1378 | 591 if (rrp->peers->single) { |
884 | 592 pc->tries = 0; |
593 return; | |
594 } | |
595 | |
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596 peer = &rrp->peers->peer[rrp->current]; |
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597 |
884 | 598 if (state & NGX_PEER_FAILED) { |
599 now = ngx_time(); | |
600 | |
601 /* ngx_lock_mutex(rrp->peers->mutex); */ | |
602 | |
603 peer->fails++; | |
604 peer->accessed = now; | |
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605 peer->checked = now; |
884 | 606 |
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607 if (peer->max_fails) { |
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608 peer->effective_weight -= peer->weight / peer->max_fails; |
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609 } |
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610 |
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611 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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612 "free rr peer failed: %ui %i", |
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613 rrp->current, peer->effective_weight); |
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614 |
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615 if (peer->effective_weight < 0) { |
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616 peer->effective_weight = 0; |
884 | 617 } |
618 | |
619 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
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620 |
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621 } else { |
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622 |
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623 /* mark peer live if check passed */ |
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624 |
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625 if (peer->accessed < peer->checked) { |
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626 peer->fails = 0; |
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627 } |
884 | 628 } |
629 | |
630 if (pc->tries) { | |
631 pc->tries--; | |
632 } | |
633 | |
634 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
635 } | |
636 | |
637 | |
638 #if (NGX_HTTP_SSL) | |
639 | |
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640 ngx_int_t |
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641 ngx_http_upstream_set_round_robin_peer_session(ngx_peer_connection_t *pc, |
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642 void *data) |
884 | 643 { |
644 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
645 | |
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646 ngx_int_t rc; |
884 | 647 ngx_ssl_session_t *ssl_session; |
648 ngx_http_upstream_rr_peer_t *peer; | |
649 | |
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650 peer = &rrp->peers->peer[rrp->current]; |
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651 |
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652 /* TODO: threads only mutex */ |
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653 /* ngx_lock_mutex(rrp->peers->mutex); */ |
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654 |
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655 ssl_session = peer->ssl_session; |
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656 |
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657 rc = ngx_ssl_set_session(pc->connection, ssl_session); |
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658 |
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659 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
1443 | 660 "set session: %p:%d", |
661 ssl_session, ssl_session ? ssl_session->references : 0); | |
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662 |
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663 /* ngx_unlock_mutex(rrp->peers->mutex); */ |
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664 |
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665 return rc; |
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666 } |
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667 |
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668 |
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|
669 void |
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670 ngx_http_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc, |
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671 void *data) |
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672 { |
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673 ngx_http_upstream_rr_peer_data_t *rrp = data; |
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674 |
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675 ngx_ssl_session_t *old_ssl_session, *ssl_session; |
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676 ngx_http_upstream_rr_peer_t *peer; |
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677 |
884 | 678 ssl_session = ngx_ssl_get_session(pc->connection); |
679 | |
680 if (ssl_session == NULL) { | |
681 return; | |
682 } | |
683 | |
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684 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
1443 | 685 "save session: %p:%d", ssl_session, ssl_session->references); |
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686 |
884 | 687 peer = &rrp->peers->peer[rrp->current]; |
688 | |
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689 /* TODO: threads only mutex */ |
884 | 690 /* ngx_lock_mutex(rrp->peers->mutex); */ |
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|
691 |
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692 old_ssl_session = peer->ssl_session; |
884 | 693 peer->ssl_session = ssl_session; |
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694 |
884 | 695 /* ngx_unlock_mutex(rrp->peers->mutex); */ |
696 | |
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697 if (old_ssl_session) { |
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698 |
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699 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
1443 | 700 "old session: %p:%d", |
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701 old_ssl_session, old_ssl_session->references); |
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702 |
884 | 703 /* TODO: may block */ |
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704 |
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705 ngx_ssl_free_session(old_ssl_session); |
884 | 706 } |
707 } | |
708 | |
3964
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709 |
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710 static ngx_int_t |
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711 ngx_http_upstream_empty_set_session(ngx_peer_connection_t *pc, void *data) |
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712 { |
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713 return NGX_OK; |
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714 } |
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715 |
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716 |
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717 static void |
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718 ngx_http_upstream_empty_save_session(ngx_peer_connection_t *pc, void *data) |
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719 { |
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720 return; |
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721 } |
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722 |
884 | 723 #endif |