260
|
1
|
|
2 /*
|
|
3 * Copyright (C) Igor Sysoev
|
660
|
4 * Copyright (C) Nginx, Inc.
|
260
|
5 */
|
|
6
|
|
7
|
|
8 #include <ngx_config.h>
|
|
9 #include <ngx_core.h>
|
|
10 #include <ngx_http.h>
|
|
11
|
|
12
|
372
|
13 static ngx_int_t ngx_http_upstream_cmp_servers(const void *one,
|
|
14 const void *two);
|
674
|
15 static ngx_http_upstream_rr_peer_t *ngx_http_upstream_get_peer(
|
|
16 ngx_http_upstream_rr_peer_data_t *rrp);
|
324
|
17
|
632
|
18 #if (NGX_HTTP_SSL)
|
|
19
|
|
20 static ngx_int_t ngx_http_upstream_empty_set_session(ngx_peer_connection_t *pc,
|
|
21 void *data);
|
|
22 static void ngx_http_upstream_empty_save_session(ngx_peer_connection_t *pc,
|
|
23 void *data);
|
|
24
|
|
25 #endif
|
|
26
|
324
|
27
|
260
|
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;
|
676
|
33 ngx_uint_t i, j, n, w;
|
260
|
34 ngx_http_upstream_server_t *server;
|
326
|
35 ngx_http_upstream_rr_peers_t *peers, *backup;
|
260
|
36
|
|
37 us->peer.init = ngx_http_upstream_init_round_robin_peer;
|
|
38
|
|
39 if (us->servers) {
|
|
40 server = us->servers->elts;
|
|
41
|
326
|
42 n = 0;
|
676
|
43 w = 0;
|
326
|
44
|
260
|
45 for (i = 0; i < us->servers->nelts; i++) {
|
326
|
46 if (server[i].backup) {
|
|
47 continue;
|
|
48 }
|
|
49
|
260
|
50 n += server[i].naddrs;
|
676
|
51 w += server[i].naddrs * server[i].weight;
|
260
|
52 }
|
|
53
|
670
|
54 if (n == 0) {
|
|
55 ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
|
|
56 "no servers in upstream \"%V\" in %s:%ui",
|
|
57 &us->host, us->file_name, us->line);
|
|
58 return NGX_ERROR;
|
|
59 }
|
|
60
|
260
|
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
|
326
|
67 peers->single = (n == 1);
|
260
|
68 peers->number = n;
|
676
|
69 peers->weighted = (w != n);
|
|
70 peers->total_weight = w;
|
260
|
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++) {
|
326
|
77 if (server[i].backup) {
|
|
78 continue;
|
|
79 }
|
|
80
|
260
|
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;
|
674
|
87 peers->peer[n].weight = server[i].weight;
|
|
88 peers->peer[n].effective_weight = server[i].weight;
|
|
89 peers->peer[n].current_weight = 0;
|
260
|
90 n++;
|
|
91 }
|
|
92 }
|
|
93
|
|
94 us->peer.data = peers;
|
|
95
|
326
|
96 ngx_sort(&peers->peer[0], (size_t) n,
|
|
97 sizeof(ngx_http_upstream_rr_peer_t),
|
|
98 ngx_http_upstream_cmp_servers);
|
|
99
|
|
100 /* backup servers */
|
|
101
|
|
102 n = 0;
|
676
|
103 w = 0;
|
326
|
104
|
|
105 for (i = 0; i < us->servers->nelts; i++) {
|
|
106 if (!server[i].backup) {
|
|
107 continue;
|
|
108 }
|
|
109
|
|
110 n += server[i].naddrs;
|
676
|
111 w += server[i].naddrs * server[i].weight;
|
326
|
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;
|
676
|
127 backup->weighted = (w != n);
|
|
128 backup->total_weight = w;
|
326
|
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;
|
674
|
143 backup->peer[n].effective_weight = server[i].weight;
|
|
144 backup->peer[n].current_weight = 0;
|
326
|
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
|
|
154 ngx_sort(&backup->peer[0], (size_t) n,
|
|
155 sizeof(ngx_http_upstream_rr_peer_t),
|
|
156 ngx_http_upstream_cmp_servers);
|
|
157
|
260
|
158 return NGX_OK;
|
|
159 }
|
|
160
|
|
161
|
|
162 /* an upstream implicitly defined by proxy_pass, etc. */
|
|
163
|
266
|
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",
|
336
|
167 &us->host, us->file_name, us->line);
|
266
|
168 return NGX_ERROR;
|
|
169 }
|
|
170
|
260
|
171 ngx_memzero(&u, sizeof(ngx_url_t));
|
|
172
|
|
173 u.host = us->host;
|
266
|
174 u.port = (in_port_t) (us->port ? us->port : us->default_port);
|
260
|
175
|
340
|
176 if (ngx_inet_resolve_host(cf->pool, &u) != NGX_OK) {
|
260
|
177 if (u.err) {
|
|
178 ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
|
262
|
179 "%s in upstream \"%V\" in %s:%ui",
|
336
|
180 u.err, &us->host, us->file_name, us->line);
|
260
|
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
|
326
|
194 peers->single = (n == 1);
|
260
|
195 peers->number = n;
|
676
|
196 peers->weighted = 0;
|
|
197 peers->total_weight = n;
|
260
|
198 peers->name = &us->host;
|
|
199
|
|
200 for (i = 0; i < u.naddrs; i++) {
|
340
|
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;
|
674
|
205 peers->peer[i].effective_weight = 1;
|
|
206 peers->peer[i].current_weight = 0;
|
340
|
207 peers->peer[i].max_fails = 1;
|
|
208 peers->peer[i].fail_timeout = 10;
|
260
|
209 }
|
|
210
|
|
211 us->peer.data = peers;
|
|
212
|
326
|
213 /* implicitly defined upstream has no backup servers */
|
|
214
|
260
|
215 return NGX_OK;
|
|
216 }
|
|
217
|
|
218
|
372
|
219 static ngx_int_t
|
326
|
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
|
260
|
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
|
634
|
252 n = rrp->peers->number;
|
|
253
|
|
254 if (rrp->peers->next && rrp->peers->next->number > n) {
|
|
255 n = rrp->peers->next->number;
|
|
256 }
|
|
257
|
|
258 if (n <= 8 * sizeof(uintptr_t)) {
|
260
|
259 rrp->tried = &rrp->data;
|
|
260 rrp->data = 0;
|
|
261
|
|
262 } else {
|
634
|
263 n = (n + (8 * sizeof(uintptr_t) - 1)) / (8 * sizeof(uintptr_t));
|
260
|
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)
|
318
|
275 r->upstream->peer.set_session =
|
|
276 ngx_http_upstream_set_round_robin_peer_session;
|
|
277 r->upstream->peer.save_session =
|
|
278 ngx_http_upstream_save_round_robin_peer_session;
|
260
|
279 #endif
|
|
280
|
|
281 return NGX_OK;
|
|
282 }
|
|
283
|
|
284
|
|
285 ngx_int_t
|
348
|
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
|
434
|
317 if (ur->sockaddr) {
|
|
318 peers->peer[0].sockaddr = ur->sockaddr;
|
|
319 peers->peer[0].socklen = ur->socklen;
|
|
320 peers->peer[0].name = ur->host;
|
|
321 peers->peer[0].weight = 1;
|
674
|
322 peers->peer[0].effective_weight = 1;
|
|
323 peers->peer[0].current_weight = 0;
|
434
|
324 peers->peer[0].max_fails = 1;
|
|
325 peers->peer[0].fail_timeout = 10;
|
348
|
326
|
434
|
327 } else {
|
|
328
|
|
329 for (i = 0; i < ur->naddrs; i++) {
|
348
|
330
|
434
|
331 len = NGX_INET_ADDRSTRLEN + sizeof(":65536") - 1;
|
|
332
|
|
333 p = ngx_pnalloc(r->pool, len);
|
|
334 if (p == NULL) {
|
|
335 return NGX_ERROR;
|
|
336 }
|
348
|
337
|
434
|
338 len = ngx_inet_ntop(AF_INET, &ur->addrs[i], p, NGX_INET_ADDRSTRLEN);
|
|
339 len = ngx_sprintf(&p[len], ":%d", ur->port) - p;
|
348
|
340
|
434
|
341 sin = ngx_pcalloc(r->pool, sizeof(struct sockaddr_in));
|
|
342 if (sin == NULL) {
|
|
343 return NGX_ERROR;
|
|
344 }
|
348
|
345
|
434
|
346 sin->sin_family = AF_INET;
|
|
347 sin->sin_port = htons(ur->port);
|
|
348 sin->sin_addr.s_addr = ur->addrs[i];
|
|
349
|
|
350 peers->peer[i].sockaddr = (struct sockaddr *) sin;
|
|
351 peers->peer[i].socklen = sizeof(struct sockaddr_in);
|
|
352 peers->peer[i].name.len = len;
|
|
353 peers->peer[i].name.data = p;
|
|
354 peers->peer[i].weight = 1;
|
674
|
355 peers->peer[i].effective_weight = 1;
|
|
356 peers->peer[i].current_weight = 0;
|
434
|
357 peers->peer[i].max_fails = 1;
|
|
358 peers->peer[i].fail_timeout = 10;
|
|
359 }
|
348
|
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)
|
632
|
383 r->upstream->peer.set_session = ngx_http_upstream_empty_set_session;
|
|
384 r->upstream->peer.save_session = ngx_http_upstream_empty_save_session;
|
348
|
385 #endif
|
|
386
|
|
387 return NGX_OK;
|
|
388 }
|
|
389
|
|
390
|
|
391 ngx_int_t
|
260
|
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
|
326
|
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;
|
260
|
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
|
326
|
430 if (rrp->peers->single) {
|
260
|
431 peer = &rrp->peers->peer[0];
|
|
432
|
692
|
433 if (peer->down) {
|
|
434 goto failed;
|
|
435 }
|
|
436
|
260
|
437 } else {
|
|
438
|
|
439 /* there are several peers */
|
|
440
|
674
|
441 peer = ngx_http_upstream_get_peer(rrp);
|
260
|
442
|
674
|
443 if (peer == NULL) {
|
|
444 goto failed;
|
260
|
445 }
|
|
446
|
674
|
447 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
|
448 "get rr peer, current: %ui %i",
|
|
449 rrp->current, peer->current_weight);
|
260
|
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
|
326
|
458 if (pc->tries == 1 && rrp->peers->next) {
|
|
459 pc->tries += rrp->peers->next->number;
|
|
460 }
|
|
461
|
260
|
462 return NGX_OK;
|
|
463
|
|
464 failed:
|
|
465
|
326
|
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;
|
|
478 for (i = 0; i < n; i++) {
|
|
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
|
260
|
491 /* all peers failed, mark them as live for quick recovery */
|
|
492
|
326
|
493 for (i = 0; i < peers->number; i++) {
|
|
494 peers->peer[i].fails = 0;
|
260
|
495 }
|
|
496
|
326
|
497 /* ngx_unlock_mutex(peers->mutex); */
|
260
|
498
|
326
|
499 pc->name = peers->name;
|
260
|
500
|
|
501 return NGX_BUSY;
|
|
502 }
|
|
503
|
|
504
|
674
|
505 static ngx_http_upstream_rr_peer_t *
|
|
506 ngx_http_upstream_get_peer(ngx_http_upstream_rr_peer_data_t *rrp)
|
324
|
507 {
|
674
|
508 time_t now;
|
|
509 uintptr_t m;
|
|
510 ngx_int_t total;
|
|
511 ngx_uint_t i, n;
|
|
512 ngx_http_upstream_rr_peer_t *peer, *best;
|
324
|
513
|
674
|
514 now = ngx_time();
|
324
|
515
|
674
|
516 best = NULL;
|
|
517 total = 0;
|
324
|
518
|
674
|
519 for (i = 0; i < rrp->peers->number; i++) {
|
324
|
520
|
674
|
521 n = i / (8 * sizeof(uintptr_t));
|
|
522 m = (uintptr_t) 1 << i % (8 * sizeof(uintptr_t));
|
324
|
523
|
674
|
524 if (rrp->tried[n] & m) {
|
|
525 continue;
|
|
526 }
|
324
|
527
|
674
|
528 peer = &rrp->peers->peer[i];
|
324
|
529
|
674
|
530 if (peer->down) {
|
|
531 continue;
|
324
|
532 }
|
|
533
|
674
|
534 if (peer->max_fails
|
|
535 && peer->fails >= peer->max_fails
|
|
536 && now - peer->checked <= peer->fail_timeout)
|
|
537 {
|
|
538 continue;
|
|
539 }
|
|
540
|
|
541 peer->current_weight += peer->effective_weight;
|
|
542 total += peer->effective_weight;
|
|
543
|
|
544 if (peer->effective_weight < peer->weight) {
|
|
545 peer->effective_weight++;
|
634
|
546 }
|
|
547
|
674
|
548 if (best == NULL || peer->current_weight > best->current_weight) {
|
|
549 best = peer;
|
324
|
550 }
|
|
551 }
|
674
|
552
|
|
553 if (best == NULL) {
|
|
554 return NULL;
|
|
555 }
|
|
556
|
|
557 i = best - &rrp->peers->peer[0];
|
|
558
|
|
559 rrp->current = i;
|
|
560
|
|
561 n = i / (8 * sizeof(uintptr_t));
|
|
562 m = (uintptr_t) 1 << i % (8 * sizeof(uintptr_t));
|
|
563
|
|
564 rrp->tried[n] |= m;
|
|
565
|
|
566 best->current_weight -= total;
|
|
567 best->checked = now;
|
|
568
|
|
569 return best;
|
324
|
570 }
|
|
571
|
|
572
|
260
|
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
|
326
|
591 if (rrp->peers->single) {
|
260
|
592 pc->tries = 0;
|
|
593 return;
|
|
594 }
|
|
595
|
644
|
596 peer = &rrp->peers->peer[rrp->current];
|
|
597
|
260
|
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;
|
644
|
605 peer->checked = now;
|
260
|
606
|
400
|
607 if (peer->max_fails) {
|
674
|
608 peer->effective_weight -= peer->weight / peer->max_fails;
|
400
|
609 }
|
324
|
610
|
|
611 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
|
612 "free rr peer failed: %ui %i",
|
674
|
613 rrp->current, peer->effective_weight);
|
324
|
614
|
674
|
615 if (peer->effective_weight < 0) {
|
|
616 peer->effective_weight = 0;
|
260
|
617 }
|
|
618
|
|
619 /* ngx_unlock_mutex(rrp->peers->mutex); */
|
644
|
620
|
|
621 } else {
|
|
622
|
|
623 /* mark peer live if check passed */
|
|
624
|
|
625 if (peer->accessed < peer->checked) {
|
|
626 peer->fails = 0;
|
|
627 }
|
260
|
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
|
318
|
640 ngx_int_t
|
|
641 ngx_http_upstream_set_round_robin_peer_session(ngx_peer_connection_t *pc,
|
|
642 void *data)
|
260
|
643 {
|
|
644 ngx_http_upstream_rr_peer_data_t *rrp = data;
|
|
645
|
318
|
646 ngx_int_t rc;
|
260
|
647 ngx_ssl_session_t *ssl_session;
|
|
648 ngx_http_upstream_rr_peer_t *peer;
|
|
649
|
318
|
650 peer = &rrp->peers->peer[rrp->current];
|
|
651
|
|
652 /* TODO: threads only mutex */
|
|
653 /* ngx_lock_mutex(rrp->peers->mutex); */
|
|
654
|
|
655 ssl_session = peer->ssl_session;
|
|
656
|
|
657 rc = ngx_ssl_set_session(pc->connection, ssl_session);
|
|
658
|
|
659 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
332
|
660 "set session: %p:%d",
|
|
661 ssl_session, ssl_session ? ssl_session->references : 0);
|
318
|
662
|
|
663 /* ngx_unlock_mutex(rrp->peers->mutex); */
|
|
664
|
|
665 return rc;
|
|
666 }
|
|
667
|
|
668
|
|
669 void
|
|
670 ngx_http_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc,
|
|
671 void *data)
|
|
672 {
|
|
673 ngx_http_upstream_rr_peer_data_t *rrp = data;
|
|
674
|
|
675 ngx_ssl_session_t *old_ssl_session, *ssl_session;
|
|
676 ngx_http_upstream_rr_peer_t *peer;
|
|
677
|
260
|
678 ssl_session = ngx_ssl_get_session(pc->connection);
|
|
679
|
|
680 if (ssl_session == NULL) {
|
|
681 return;
|
|
682 }
|
|
683
|
318
|
684 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
332
|
685 "save session: %p:%d", ssl_session, ssl_session->references);
|
318
|
686
|
260
|
687 peer = &rrp->peers->peer[rrp->current];
|
|
688
|
318
|
689 /* TODO: threads only mutex */
|
260
|
690 /* ngx_lock_mutex(rrp->peers->mutex); */
|
318
|
691
|
|
692 old_ssl_session = peer->ssl_session;
|
260
|
693 peer->ssl_session = ssl_session;
|
318
|
694
|
260
|
695 /* ngx_unlock_mutex(rrp->peers->mutex); */
|
|
696
|
318
|
697 if (old_ssl_session) {
|
|
698
|
|
699 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
332
|
700 "old session: %p:%d",
|
318
|
701 old_ssl_session, old_ssl_session->references);
|
|
702
|
260
|
703 /* TODO: may block */
|
318
|
704
|
|
705 ngx_ssl_free_session(old_ssl_session);
|
260
|
706 }
|
|
707 }
|
|
708
|
632
|
709
|
|
710 static ngx_int_t
|
|
711 ngx_http_upstream_empty_set_session(ngx_peer_connection_t *pc, void *data)
|
|
712 {
|
|
713 return NGX_OK;
|
|
714 }
|
|
715
|
|
716
|
|
717 static void
|
|
718 ngx_http_upstream_empty_save_session(ngx_peer_connection_t *pc, void *data)
|
|
719 {
|
|
720 return;
|
|
721 }
|
|
722
|
260
|
723 #endif
|