Mercurial > hg > nginx-quic
annotate src/http/ngx_http_upstream_round_robin.c @ 5396:42f874c0b970
Mail: added session close on smtp_greeting_delay violation.
A server MUST send greeting before other replies, while before this
change in case of smtp_greeting_delay violation the 220 greeting was
sent after several 503 replies to commands received before greeting,
resulting in protocol synchronization loss. Moreover, further commands
were accepted after the greeting.
While closing a connection isn't strictly RFC compliant (RFC 5321
requires servers to wait for a QUIT before closing a connection), it's
probably good enough for practial uses.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 30 Sep 2013 22:09:50 +0400 |
parents | 1d68b502088c |
children | e6a1623f87bc |
rev | line source |
---|---|
884 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
884 | 5 */ |
6 | |
7 | |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 #include <ngx_http.h> | |
11 | |
12 | |
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13 static ngx_http_upstream_rr_peer_t *ngx_http_upstream_get_peer( |
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14 ngx_http_upstream_rr_peer_data_t *rrp); |
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15 |
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16 #if (NGX_HTTP_SSL) |
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17 |
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18 static ngx_int_t ngx_http_upstream_empty_set_session(ngx_peer_connection_t *pc, |
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19 void *data); |
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20 static void ngx_http_upstream_empty_save_session(ngx_peer_connection_t *pc, |
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21 void *data); |
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22 |
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23 #endif |
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24 |
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25 |
884 | 26 ngx_int_t |
27 ngx_http_upstream_init_round_robin(ngx_conf_t *cf, | |
28 ngx_http_upstream_srv_conf_t *us) | |
29 { | |
30 ngx_url_t u; | |
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31 ngx_uint_t i, j, n, w; |
884 | 32 ngx_http_upstream_server_t *server; |
1378 | 33 ngx_http_upstream_rr_peers_t *peers, *backup; |
884 | 34 |
35 us->peer.init = ngx_http_upstream_init_round_robin_peer; | |
36 | |
37 if (us->servers) { | |
38 server = us->servers->elts; | |
39 | |
1378 | 40 n = 0; |
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41 w = 0; |
1378 | 42 |
884 | 43 for (i = 0; i < us->servers->nelts; i++) { |
1378 | 44 if (server[i].backup) { |
45 continue; | |
46 } | |
47 | |
884 | 48 n += server[i].naddrs; |
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49 w += server[i].naddrs * server[i].weight; |
884 | 50 } |
51 | |
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52 if (n == 0) { |
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53 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, |
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54 "no servers in upstream \"%V\" in %s:%ui", |
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55 &us->host, us->file_name, us->line); |
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56 return NGX_ERROR; |
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57 } |
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58 |
884 | 59 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) |
60 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
61 if (peers == NULL) { | |
62 return NGX_ERROR; | |
63 } | |
64 | |
1378 | 65 peers->single = (n == 1); |
884 | 66 peers->number = n; |
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67 peers->weighted = (w != n); |
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68 peers->total_weight = w; |
884 | 69 peers->name = &us->host; |
70 | |
71 n = 0; | |
72 | |
73 for (i = 0; i < us->servers->nelts; i++) { | |
74 for (j = 0; j < server[i].naddrs; j++) { | |
1378 | 75 if (server[i].backup) { |
76 continue; | |
77 } | |
78 | |
884 | 79 peers->peer[n].sockaddr = server[i].addrs[j].sockaddr; |
80 peers->peer[n].socklen = server[i].addrs[j].socklen; | |
81 peers->peer[n].name = server[i].addrs[j].name; | |
82 peers->peer[n].max_fails = server[i].max_fails; | |
83 peers->peer[n].fail_timeout = server[i].fail_timeout; | |
84 peers->peer[n].down = server[i].down; | |
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85 peers->peer[n].weight = server[i].weight; |
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86 peers->peer[n].effective_weight = server[i].weight; |
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87 peers->peer[n].current_weight = 0; |
884 | 88 n++; |
89 } | |
90 } | |
91 | |
92 us->peer.data = peers; | |
93 | |
1378 | 94 /* backup servers */ |
95 | |
96 n = 0; | |
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97 w = 0; |
1378 | 98 |
99 for (i = 0; i < us->servers->nelts; i++) { | |
100 if (!server[i].backup) { | |
101 continue; | |
102 } | |
103 | |
104 n += server[i].naddrs; | |
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105 w += server[i].naddrs * server[i].weight; |
1378 | 106 } |
107 | |
108 if (n == 0) { | |
109 return NGX_OK; | |
110 } | |
111 | |
112 backup = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
113 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
114 if (backup == NULL) { | |
115 return NGX_ERROR; | |
116 } | |
117 | |
118 peers->single = 0; | |
119 backup->single = 0; | |
120 backup->number = n; | |
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121 backup->weighted = (w != n); |
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122 backup->total_weight = w; |
1378 | 123 backup->name = &us->host; |
124 | |
125 n = 0; | |
126 | |
127 for (i = 0; i < us->servers->nelts; i++) { | |
128 for (j = 0; j < server[i].naddrs; j++) { | |
129 if (!server[i].backup) { | |
130 continue; | |
131 } | |
132 | |
133 backup->peer[n].sockaddr = server[i].addrs[j].sockaddr; | |
134 backup->peer[n].socklen = server[i].addrs[j].socklen; | |
135 backup->peer[n].name = server[i].addrs[j].name; | |
136 backup->peer[n].weight = server[i].weight; | |
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137 backup->peer[n].effective_weight = server[i].weight; |
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138 backup->peer[n].current_weight = 0; |
1378 | 139 backup->peer[n].max_fails = server[i].max_fails; |
140 backup->peer[n].fail_timeout = server[i].fail_timeout; | |
141 backup->peer[n].down = server[i].down; | |
142 n++; | |
143 } | |
144 } | |
145 | |
146 peers->next = backup; | |
147 | |
884 | 148 return NGX_OK; |
149 } | |
150 | |
151 | |
152 /* an upstream implicitly defined by proxy_pass, etc. */ | |
153 | |
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154 if (us->port == 0) { |
906 | 155 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, |
156 "no port in upstream \"%V\" in %s:%ui", | |
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157 &us->host, us->file_name, us->line); |
906 | 158 return NGX_ERROR; |
159 } | |
160 | |
884 | 161 ngx_memzero(&u, sizeof(ngx_url_t)); |
162 | |
163 u.host = us->host; | |
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164 u.port = us->port; |
884 | 165 |
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166 if (ngx_inet_resolve_host(cf->pool, &u) != NGX_OK) { |
884 | 167 if (u.err) { |
168 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, | |
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169 "%s in upstream \"%V\" in %s:%ui", |
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170 u.err, &us->host, us->file_name, us->line); |
884 | 171 } |
172 | |
173 return NGX_ERROR; | |
174 } | |
175 | |
176 n = u.naddrs; | |
177 | |
178 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
179 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
180 if (peers == NULL) { | |
181 return NGX_ERROR; | |
182 } | |
183 | |
1378 | 184 peers->single = (n == 1); |
884 | 185 peers->number = n; |
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186 peers->weighted = 0; |
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187 peers->total_weight = n; |
884 | 188 peers->name = &us->host; |
189 | |
190 for (i = 0; i < u.naddrs; i++) { | |
1564 | 191 peers->peer[i].sockaddr = u.addrs[i].sockaddr; |
192 peers->peer[i].socklen = u.addrs[i].socklen; | |
193 peers->peer[i].name = u.addrs[i].name; | |
194 peers->peer[i].weight = 1; | |
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195 peers->peer[i].effective_weight = 1; |
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196 peers->peer[i].current_weight = 0; |
1564 | 197 peers->peer[i].max_fails = 1; |
198 peers->peer[i].fail_timeout = 10; | |
884 | 199 } |
200 | |
201 us->peer.data = peers; | |
202 | |
1378 | 203 /* implicitly defined upstream has no backup servers */ |
204 | |
884 | 205 return NGX_OK; |
206 } | |
207 | |
208 | |
209 ngx_int_t | |
210 ngx_http_upstream_init_round_robin_peer(ngx_http_request_t *r, | |
211 ngx_http_upstream_srv_conf_t *us) | |
212 { | |
213 ngx_uint_t n; | |
214 ngx_http_upstream_rr_peer_data_t *rrp; | |
215 | |
216 rrp = r->upstream->peer.data; | |
217 | |
218 if (rrp == NULL) { | |
219 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t)); | |
220 if (rrp == NULL) { | |
221 return NGX_ERROR; | |
222 } | |
223 | |
224 r->upstream->peer.data = rrp; | |
225 } | |
226 | |
227 rrp->peers = us->peer.data; | |
228 rrp->current = 0; | |
229 | |
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230 n = rrp->peers->number; |
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231 |
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232 if (rrp->peers->next && rrp->peers->next->number > n) { |
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233 n = rrp->peers->next->number; |
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234 } |
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235 |
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236 if (n <= 8 * sizeof(uintptr_t)) { |
884 | 237 rrp->tried = &rrp->data; |
238 rrp->data = 0; | |
239 | |
240 } else { | |
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241 n = (n + (8 * sizeof(uintptr_t) - 1)) / (8 * sizeof(uintptr_t)); |
884 | 242 |
243 rrp->tried = ngx_pcalloc(r->pool, n * sizeof(uintptr_t)); | |
244 if (rrp->tried == NULL) { | |
245 return NGX_ERROR; | |
246 } | |
247 } | |
248 | |
249 r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer; | |
250 r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer; | |
251 r->upstream->peer.tries = rrp->peers->number; | |
252 #if (NGX_HTTP_SSL) | |
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253 r->upstream->peer.set_session = |
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254 ngx_http_upstream_set_round_robin_peer_session; |
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255 r->upstream->peer.save_session = |
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256 ngx_http_upstream_save_round_robin_peer_session; |
884 | 257 #endif |
258 | |
259 return NGX_OK; | |
260 } | |
261 | |
262 | |
263 ngx_int_t | |
1658 | 264 ngx_http_upstream_create_round_robin_peer(ngx_http_request_t *r, |
265 ngx_http_upstream_resolved_t *ur) | |
266 { | |
267 u_char *p; | |
268 size_t len; | |
269 ngx_uint_t i, n; | |
270 struct sockaddr_in *sin; | |
271 ngx_http_upstream_rr_peers_t *peers; | |
272 ngx_http_upstream_rr_peer_data_t *rrp; | |
273 | |
274 rrp = r->upstream->peer.data; | |
275 | |
276 if (rrp == NULL) { | |
277 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t)); | |
278 if (rrp == NULL) { | |
279 return NGX_ERROR; | |
280 } | |
281 | |
282 r->upstream->peer.data = rrp; | |
283 } | |
284 | |
285 peers = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
286 + sizeof(ngx_http_upstream_rr_peer_t) * (ur->naddrs - 1)); | |
287 if (peers == NULL) { | |
288 return NGX_ERROR; | |
289 } | |
290 | |
291 peers->single = (ur->naddrs == 1); | |
292 peers->number = ur->naddrs; | |
293 peers->name = &ur->host; | |
294 | |
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295 if (ur->sockaddr) { |
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296 peers->peer[0].sockaddr = ur->sockaddr; |
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297 peers->peer[0].socklen = ur->socklen; |
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298 peers->peer[0].name = ur->host; |
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299 peers->peer[0].weight = 1; |
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300 peers->peer[0].effective_weight = 1; |
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301 peers->peer[0].current_weight = 0; |
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302 peers->peer[0].max_fails = 1; |
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303 peers->peer[0].fail_timeout = 10; |
1658 | 304 |
2422
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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
Upstream: fixed state resetting when switching to backup servers.
Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
435 / (8 * sizeof(uintptr_t)); |
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Upstream: fixed state resetting when switching to backup servers.
Valentin Bartenev <vbart@nginx.com>
parents:
4914
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
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|
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
changeset
|
466 { |
4621
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|
467 time_t now; |
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Upstream: smooth weighted round-robin balancing.
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diff
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|
468 uintptr_t m; |
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Upstream: smooth weighted round-robin balancing.
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diff
changeset
|
469 ngx_int_t total; |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
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diff
changeset
|
470 ngx_uint_t i, n; |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
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diff
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|
471 ngx_http_upstream_rr_peer_t *peer, *best; |
1344
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fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
472 |
4621
c90801720a0c
Upstream: smooth weighted round-robin balancing.
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diff
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|
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.
Maxim Dounin <mdounin@mdounin.ru>
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diff
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|
475 best = NULL; |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
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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.
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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:
1284
diff
changeset
|
479 |
4621
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Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
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diff
changeset
|
480 n = i / (8 * sizeof(uintptr_t)); |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
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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:
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diff
changeset
|
483 if (rrp->tried[n] & m) { |
c90801720a0c
Upstream: smooth weighted round-robin balancing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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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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4569
diff
changeset
|
487 peer = &rrp->peers->peer[i]; |
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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:
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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:
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diff
changeset
|
508 best = peer; |
1344
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fair upstream weight balancer
Igor Sysoev <igor@sysoev.ru>
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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 |
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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; |
5220
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526 |
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527 if (now - best->checked > best->fail_timeout) { |
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528 best->checked = now; |
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529 } |
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530 |
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531 return best; |
1344
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532 } |
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533 |
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534 |
884 | 535 void |
536 ngx_http_upstream_free_round_robin_peer(ngx_peer_connection_t *pc, void *data, | |
537 ngx_uint_t state) | |
538 { | |
539 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
540 | |
541 time_t now; | |
542 ngx_http_upstream_rr_peer_t *peer; | |
543 | |
544 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
545 "free rr peer %ui %ui", pc->tries, state); | |
546 | |
547 /* TODO: NGX_PEER_KEEPALIVE */ | |
548 | |
1378 | 549 if (rrp->peers->single) { |
884 | 550 pc->tries = 0; |
551 return; | |
552 } | |
553 | |
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554 peer = &rrp->peers->peer[rrp->current]; |
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555 |
884 | 556 if (state & NGX_PEER_FAILED) { |
557 now = ngx_time(); | |
558 | |
559 /* ngx_lock_mutex(rrp->peers->mutex); */ | |
560 | |
561 peer->fails++; | |
562 peer->accessed = now; | |
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563 peer->checked = now; |
884 | 564 |
2204
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565 if (peer->max_fails) { |
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566 peer->effective_weight -= peer->weight / peer->max_fails; |
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567 } |
1344
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568 |
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569 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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570 "free rr peer failed: %ui %i", |
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571 rrp->current, peer->effective_weight); |
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572 |
4621
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573 if (peer->effective_weight < 0) { |
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574 peer->effective_weight = 0; |
884 | 575 } |
576 | |
577 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
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578 |
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579 } else { |
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580 |
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581 /* mark peer live if check passed */ |
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582 |
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583 if (peer->accessed < peer->checked) { |
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584 peer->fails = 0; |
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585 } |
884 | 586 } |
587 | |
588 if (pc->tries) { | |
589 pc->tries--; | |
590 } | |
591 | |
592 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
593 } | |
594 | |
595 | |
596 #if (NGX_HTTP_SSL) | |
597 | |
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598 ngx_int_t |
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599 ngx_http_upstream_set_round_robin_peer_session(ngx_peer_connection_t *pc, |
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600 void *data) |
884 | 601 { |
602 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
603 | |
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604 ngx_int_t rc; |
884 | 605 ngx_ssl_session_t *ssl_session; |
606 ngx_http_upstream_rr_peer_t *peer; | |
607 | |
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608 peer = &rrp->peers->peer[rrp->current]; |
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609 |
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610 /* TODO: threads only mutex */ |
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611 /* ngx_lock_mutex(rrp->peers->mutex); */ |
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612 |
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613 ssl_session = peer->ssl_session; |
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614 |
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615 rc = ngx_ssl_set_session(pc->connection, ssl_session); |
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616 |
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617 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
1443 | 618 "set session: %p:%d", |
619 ssl_session, ssl_session ? ssl_session->references : 0); | |
1284
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620 |
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621 /* ngx_unlock_mutex(rrp->peers->mutex); */ |
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622 |
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623 return rc; |
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624 } |
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625 |
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626 |
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627 void |
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628 ngx_http_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc, |
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629 void *data) |
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630 { |
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631 ngx_http_upstream_rr_peer_data_t *rrp = data; |
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632 |
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633 ngx_ssl_session_t *old_ssl_session, *ssl_session; |
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634 ngx_http_upstream_rr_peer_t *peer; |
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635 |
884 | 636 ssl_session = ngx_ssl_get_session(pc->connection); |
637 | |
638 if (ssl_session == NULL) { | |
639 return; | |
640 } | |
641 | |
1284
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642 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
1443 | 643 "save session: %p:%d", ssl_session, ssl_session->references); |
1284
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644 |
884 | 645 peer = &rrp->peers->peer[rrp->current]; |
646 | |
1284
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647 /* TODO: threads only mutex */ |
884 | 648 /* ngx_lock_mutex(rrp->peers->mutex); */ |
1284
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649 |
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650 old_ssl_session = peer->ssl_session; |
884 | 651 peer->ssl_session = ssl_session; |
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652 |
884 | 653 /* ngx_unlock_mutex(rrp->peers->mutex); */ |
654 | |
1284
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655 if (old_ssl_session) { |
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656 |
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657 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
1443 | 658 "old session: %p:%d", |
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659 old_ssl_session, old_ssl_session->references); |
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660 |
884 | 661 /* TODO: may block */ |
1284
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662 |
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663 ngx_ssl_free_session(old_ssl_session); |
884 | 664 } |
665 } | |
666 | |
3964
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667 |
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668 static ngx_int_t |
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669 ngx_http_upstream_empty_set_session(ngx_peer_connection_t *pc, void *data) |
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670 { |
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671 return NGX_OK; |
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672 } |
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673 |
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674 |
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675 static void |
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676 ngx_http_upstream_empty_save_session(ngx_peer_connection_t *pc, void *data) |
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677 { |
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678 return; |
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679 } |
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680 |
884 | 681 #endif |