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