Mercurial > hg > nginx
annotate src/http/ngx_http_upstream_round_robin.c @ 5136:88a302caca75
Upstream: removed rudiments of upstream connection caching.
This functionality is now provided by ngx_http_upstream_keepalive_module.
author | Ruslan Ermilov <ru@nginx.com> |
---|---|
date | Mon, 25 Mar 2013 14:51:44 +0000 |
parents | 0811376954e4 |
children | 1d68b502088c |
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_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 |
2422
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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_http_upstream_rr_peer_t *peer; | |
377 ngx_http_upstream_rr_peers_t *peers; | |
884 | 378 |
379 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
380 "get rr peer, try: %ui", pc->tries); | |
381 | |
382 /* ngx_lock_mutex(rrp->peers->mutex); */ | |
383 | |
384 pc->cached = 0; | |
385 pc->connection = NULL; | |
386 | |
1378 | 387 if (rrp->peers->single) { |
884 | 388 peer = &rrp->peers->peer[0]; |
389 | |
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parents:
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390 if (peer->down) { |
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391 goto failed; |
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392 } |
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|
393 |
884 | 394 } else { |
395 | |
396 /* there are several peers */ | |
397 | |
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398 peer = ngx_http_upstream_get_peer(rrp); |
884 | 399 |
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400 if (peer == NULL) { |
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401 goto failed; |
884 | 402 } |
403 | |
4621
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404 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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405 "get rr peer, current: %ui %i", |
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|
406 rrp->current, peer->current_weight); |
884 | 407 } |
408 | |
409 pc->sockaddr = peer->sockaddr; | |
410 pc->socklen = peer->socklen; | |
411 pc->name = &peer->name; | |
412 | |
413 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
414 | |
1378 | 415 if (pc->tries == 1 && rrp->peers->next) { |
416 pc->tries += rrp->peers->next->number; | |
417 } | |
418 | |
884 | 419 return NGX_OK; |
420 | |
421 failed: | |
422 | |
1378 | 423 peers = rrp->peers; |
424 | |
425 if (peers->next) { | |
426 | |
427 /* ngx_unlock_mutex(peers->mutex); */ | |
428 | |
429 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, pc->log, 0, "backup servers"); | |
430 | |
431 rrp->peers = peers->next; | |
432 pc->tries = rrp->peers->number; | |
433 | |
4991
a384c60d55f3
Upstream: fixed state resetting when switching to backup servers.
Valentin Bartenev <vbart@nginx.com>
parents:
4914
diff
changeset
|
434 n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1)) |
a384c60d55f3
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Valentin Bartenev <vbart@nginx.com>
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|
435 / (8 * sizeof(uintptr_t)); |
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Upstream: fixed state resetting when switching to backup servers.
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
436 |
1389 | 437 for (i = 0; i < n; i++) { |
1378 | 438 rrp->tried[i] = 0; |
439 } | |
440 | |
441 rc = ngx_http_upstream_get_round_robin_peer(pc, rrp); | |
442 | |
443 if (rc != NGX_BUSY) { | |
444 return rc; | |
445 } | |
446 | |
447 /* ngx_lock_mutex(peers->mutex); */ | |
448 } | |
449 | |
884 | 450 /* all peers failed, mark them as live for quick recovery */ |
451 | |
1378 | 452 for (i = 0; i < peers->number; i++) { |
453 peers->peer[i].fails = 0; | |
884 | 454 } |
455 | |
1378 | 456 /* ngx_unlock_mutex(peers->mutex); */ |
884 | 457 |
1378 | 458 pc->name = peers->name; |
884 | 459 |
460 return NGX_BUSY; | |
461 } | |
462 | |
463 | |
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
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parents:
4569
diff
changeset
|
464 static ngx_http_upstream_rr_peer_t * |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
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diff
changeset
|
465 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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|
466 { |
4621
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|
467 time_t now; |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
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diff
changeset
|
468 uintptr_t m; |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
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diff
changeset
|
469 ngx_int_t total; |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
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diff
changeset
|
470 ngx_uint_t i, n; |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
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diff
changeset
|
471 ngx_http_upstream_rr_peer_t *peer, *best; |
1344
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fair upstream weight balancer
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parents:
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diff
changeset
|
472 |
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
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4569
diff
changeset
|
473 now = ngx_time(); |
1344
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fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
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diff
changeset
|
474 |
4621
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Upstream: smooth weighted round-robin balancing.
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diff
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|
475 best = NULL; |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
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diff
changeset
|
476 total = 0; |
1344
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fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
477 |
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
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|
478 for (i = 0; i < rrp->peers->number; i++) { |
1344
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fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
479 |
4621
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Upstream: smooth weighted round-robin balancing.
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diff
changeset
|
480 n = i / (8 * sizeof(uintptr_t)); |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
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diff
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|
481 m = (uintptr_t) 1 << i % (8 * sizeof(uintptr_t)); |
1344
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fair upstream weight balancer
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diff
changeset
|
482 |
4621
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Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
483 if (rrp->tried[n] & m) { |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
484 continue; |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
485 } |
1344
8f5b5641966c
fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
486 |
4621
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Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
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diff
changeset
|
487 peer = &rrp->peers->peer[i]; |
1344
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parents:
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diff
changeset
|
488 |
4621
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Upstream: smooth weighted round-robin balancing.
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4569
diff
changeset
|
489 if (peer->down) { |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
490 continue; |
1344
8f5b5641966c
fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
491 } |
8f5b5641966c
fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
492 |
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
493 if (peer->max_fails |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
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parents:
4569
diff
changeset
|
494 && peer->fails >= peer->max_fails |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
495 && now - peer->checked <= peer->fail_timeout) |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
496 { |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
497 continue; |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
498 } |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
499 |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
500 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
|
501 total += peer->effective_weight; |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
502 |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
503 if (peer->effective_weight < peer->weight) { |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
504 peer->effective_weight++; |
4010
74a93d3fdd85
Fixing cpu hog with all upstream servers marked "down".
Maxim Dounin <mdounin@mdounin.ru>
parents:
3964
diff
changeset
|
505 } |
74a93d3fdd85
Fixing cpu hog with all upstream servers marked "down".
Maxim Dounin <mdounin@mdounin.ru>
parents:
3964
diff
changeset
|
506 |
4621
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Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
507 if (best == NULL || peer->current_weight > best->current_weight) { |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
508 best = peer; |
1344
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fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
509 } |
8f5b5641966c
fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
1284
diff
changeset
|
510 } |
4621
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Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
511 |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4569
diff
changeset
|
512 if (best == NULL) { |
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513 return NULL; |
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514 } |
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515 |
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516 i = best - &rrp->peers->peer[0]; |
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517 |
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518 rrp->current = i; |
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519 |
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520 n = i / (8 * sizeof(uintptr_t)); |
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521 m = (uintptr_t) 1 << i % (8 * sizeof(uintptr_t)); |
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522 |
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523 rrp->tried[n] |= m; |
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524 |
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525 best->current_weight -= total; |
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526 best->checked = now; |
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527 |
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528 return best; |
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529 } |
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530 |
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531 |
884 | 532 void |
533 ngx_http_upstream_free_round_robin_peer(ngx_peer_connection_t *pc, void *data, | |
534 ngx_uint_t state) | |
535 { | |
536 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
537 | |
538 time_t now; | |
539 ngx_http_upstream_rr_peer_t *peer; | |
540 | |
541 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
542 "free rr peer %ui %ui", pc->tries, state); | |
543 | |
544 /* TODO: NGX_PEER_KEEPALIVE */ | |
545 | |
1378 | 546 if (rrp->peers->single) { |
884 | 547 pc->tries = 0; |
548 return; | |
549 } | |
550 | |
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551 peer = &rrp->peers->peer[rrp->current]; |
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552 |
884 | 553 if (state & NGX_PEER_FAILED) { |
554 now = ngx_time(); | |
555 | |
556 /* ngx_lock_mutex(rrp->peers->mutex); */ | |
557 | |
558 peer->fails++; | |
559 peer->accessed = now; | |
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560 peer->checked = now; |
884 | 561 |
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562 if (peer->max_fails) { |
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563 peer->effective_weight -= peer->weight / peer->max_fails; |
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564 } |
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565 |
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566 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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567 "free rr peer failed: %ui %i", |
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568 rrp->current, peer->effective_weight); |
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569 |
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570 if (peer->effective_weight < 0) { |
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571 peer->effective_weight = 0; |
884 | 572 } |
573 | |
574 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
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575 |
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576 } else { |
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577 |
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578 /* mark peer live if check passed */ |
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579 |
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580 if (peer->accessed < peer->checked) { |
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581 peer->fails = 0; |
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582 } |
884 | 583 } |
584 | |
585 if (pc->tries) { | |
586 pc->tries--; | |
587 } | |
588 | |
589 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
590 } | |
591 | |
592 | |
593 #if (NGX_HTTP_SSL) | |
594 | |
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595 ngx_int_t |
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596 ngx_http_upstream_set_round_robin_peer_session(ngx_peer_connection_t *pc, |
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597 void *data) |
884 | 598 { |
599 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
600 | |
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601 ngx_int_t rc; |
884 | 602 ngx_ssl_session_t *ssl_session; |
603 ngx_http_upstream_rr_peer_t *peer; | |
604 | |
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605 peer = &rrp->peers->peer[rrp->current]; |
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606 |
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607 /* TODO: threads only mutex */ |
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608 /* ngx_lock_mutex(rrp->peers->mutex); */ |
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609 |
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610 ssl_session = peer->ssl_session; |
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611 |
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612 rc = ngx_ssl_set_session(pc->connection, ssl_session); |
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613 |
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614 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
1443 | 615 "set session: %p:%d", |
616 ssl_session, ssl_session ? ssl_session->references : 0); | |
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617 |
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618 /* ngx_unlock_mutex(rrp->peers->mutex); */ |
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619 |
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620 return rc; |
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621 } |
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622 |
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623 |
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624 void |
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625 ngx_http_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc, |
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626 void *data) |
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627 { |
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628 ngx_http_upstream_rr_peer_data_t *rrp = data; |
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629 |
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630 ngx_ssl_session_t *old_ssl_session, *ssl_session; |
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631 ngx_http_upstream_rr_peer_t *peer; |
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632 |
884 | 633 ssl_session = ngx_ssl_get_session(pc->connection); |
634 | |
635 if (ssl_session == NULL) { | |
636 return; | |
637 } | |
638 | |
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639 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
1443 | 640 "save session: %p:%d", ssl_session, ssl_session->references); |
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641 |
884 | 642 peer = &rrp->peers->peer[rrp->current]; |
643 | |
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644 /* TODO: threads only mutex */ |
884 | 645 /* ngx_lock_mutex(rrp->peers->mutex); */ |
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646 |
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647 old_ssl_session = peer->ssl_session; |
884 | 648 peer->ssl_session = ssl_session; |
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649 |
884 | 650 /* ngx_unlock_mutex(rrp->peers->mutex); */ |
651 | |
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652 if (old_ssl_session) { |
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653 |
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654 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
1443 | 655 "old session: %p:%d", |
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656 old_ssl_session, old_ssl_session->references); |
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657 |
884 | 658 /* TODO: may block */ |
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659 |
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660 ngx_ssl_free_session(old_ssl_session); |
884 | 661 } |
662 } | |
663 | |
3964
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664 |
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665 static ngx_int_t |
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666 ngx_http_upstream_empty_set_session(ngx_peer_connection_t *pc, void *data) |
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667 { |
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668 return NGX_OK; |
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669 } |
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670 |
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671 |
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672 static void |
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673 ngx_http_upstream_empty_save_session(ngx_peer_connection_t *pc, void *data) |
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674 { |
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675 return; |
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676 } |
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677 |
884 | 678 #endif |