Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Proxy variables and functions. |
| 3 | * |
Willy Tarreau | 3a7d207 | 2009-03-05 23:48:25 +0100 | [diff] [blame] | 4 | * Copyright 2000-2009 Willy Tarreau <w@1wt.eu> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <fcntl.h> |
| 14 | #include <unistd.h> |
Willy Tarreau | c8f24f8 | 2007-11-30 18:38:35 +0100 | [diff] [blame] | 15 | #include <string.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 16 | #include <sys/types.h> |
| 17 | #include <sys/socket.h> |
| 18 | #include <sys/stat.h> |
| 19 | |
Willy Tarreau | 2dd0d47 | 2006-06-29 17:53:05 +0200 | [diff] [blame] | 20 | #include <common/defaults.h> |
Willy Tarreau | 9de1bbd | 2008-07-09 20:34:27 +0200 | [diff] [blame] | 21 | #include <common/cfgparse.h> |
Willy Tarreau | 2dd0d47 | 2006-06-29 17:53:05 +0200 | [diff] [blame] | 22 | #include <common/compat.h> |
Willy Tarreau | e3ba5f0 | 2006-06-29 18:54:54 +0200 | [diff] [blame] | 23 | #include <common/config.h> |
Willy Tarreau | d740bab | 2007-10-28 11:14:07 +0100 | [diff] [blame] | 24 | #include <common/errors.h> |
Willy Tarreau | 4d2d098 | 2007-05-14 00:39:29 +0200 | [diff] [blame] | 25 | #include <common/memory.h> |
Willy Tarreau | 2dd0d47 | 2006-06-29 17:53:05 +0200 | [diff] [blame] | 26 | #include <common/time.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 27 | |
| 28 | #include <types/global.h> |
Emeric Brun | 5a8c0a9 | 2010-09-23 18:44:36 +0200 | [diff] [blame] | 29 | #include <types/peers.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 30 | |
Alexandre Cassen | 87ea548 | 2007-10-11 20:48:58 +0200 | [diff] [blame] | 31 | #include <proto/backend.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 32 | #include <proto/fd.h> |
Willy Tarreau | 51aecc7 | 2009-07-12 09:47:04 +0200 | [diff] [blame] | 33 | #include <proto/hdr_idx.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 34 | #include <proto/log.h> |
Willy Tarreau | e6b9894 | 2007-10-29 01:09:36 +0100 | [diff] [blame] | 35 | #include <proto/protocols.h> |
| 36 | #include <proto/proto_tcp.h> |
Willy Tarreau | 39e4f62 | 2010-05-31 17:01:36 +0200 | [diff] [blame] | 37 | #include <proto/proto_http.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 38 | #include <proto/proxy.h> |
Willy Tarreau | d0807c3 | 2010-08-27 18:26:11 +0200 | [diff] [blame] | 39 | #include <proto/signal.h> |
Emeric Brun | 5a8c0a9 | 2010-09-23 18:44:36 +0200 | [diff] [blame] | 40 | #include <proto/task.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 41 | |
| 42 | |
Willy Tarreau | e6b9894 | 2007-10-29 01:09:36 +0100 | [diff] [blame] | 43 | int listeners; /* # of proxy listeners, set by cfgparse, unset by maintain_proxies */ |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 44 | struct proxy *proxy = NULL; /* list of all existing proxies */ |
Willy Tarreau | 53fb4ae | 2009-10-04 23:04:08 +0200 | [diff] [blame] | 45 | struct eb_root used_proxy_id = EB_ROOT; /* list of proxy IDs in use */ |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 46 | |
Willy Tarreau | 977b8e4 | 2006-12-29 14:19:17 +0100 | [diff] [blame] | 47 | /* |
Willy Tarreau | 816eb54 | 2007-11-04 07:04:43 +0100 | [diff] [blame] | 48 | * This function returns a string containing a name describing capabilities to |
| 49 | * report comprehensible error messages. Specifically, it will return the words |
| 50 | * "frontend", "backend", "ruleset" when appropriate, or "proxy" for all other |
| 51 | * cases including the proxies declared in "listen" mode. |
Willy Tarreau | 977b8e4 | 2006-12-29 14:19:17 +0100 | [diff] [blame] | 52 | */ |
Willy Tarreau | 816eb54 | 2007-11-04 07:04:43 +0100 | [diff] [blame] | 53 | const char *proxy_cap_str(int cap) |
Willy Tarreau | 977b8e4 | 2006-12-29 14:19:17 +0100 | [diff] [blame] | 54 | { |
Willy Tarreau | 816eb54 | 2007-11-04 07:04:43 +0100 | [diff] [blame] | 55 | if ((cap & PR_CAP_LISTEN) != PR_CAP_LISTEN) { |
| 56 | if (cap & PR_CAP_FE) |
| 57 | return "frontend"; |
| 58 | else if (cap & PR_CAP_BE) |
| 59 | return "backend"; |
| 60 | else if (cap & PR_CAP_RS) |
| 61 | return "ruleset"; |
| 62 | } |
| 63 | return "proxy"; |
Willy Tarreau | 977b8e4 | 2006-12-29 14:19:17 +0100 | [diff] [blame] | 64 | } |
| 65 | |
Krzysztof Piotr Oledzki | 6eb730d | 2007-11-03 23:41:58 +0100 | [diff] [blame] | 66 | /* |
| 67 | * This function returns a string containing the mode of the proxy in a format |
| 68 | * suitable for error messages. |
| 69 | */ |
Krzysztof Piotr Oledzki | 6eb730d | 2007-11-03 23:41:58 +0100 | [diff] [blame] | 70 | const char *proxy_mode_str(int mode) { |
| 71 | |
| 72 | if (mode == PR_MODE_TCP) |
| 73 | return "tcp"; |
| 74 | else if (mode == PR_MODE_HTTP) |
| 75 | return "http"; |
| 76 | else if (mode == PR_MODE_HEALTH) |
| 77 | return "health"; |
| 78 | else |
| 79 | return "unknown"; |
| 80 | } |
| 81 | |
Willy Tarreau | f395017 | 2009-10-10 18:35:51 +0200 | [diff] [blame] | 82 | /* |
| 83 | * This function scans the list of backends and servers to retrieve the first |
| 84 | * backend and the first server with the given names, and sets them in both |
| 85 | * parameters. It returns zero if either is not found, or non-zero and sets |
| 86 | * the ones it did not found to NULL. If a NULL pointer is passed for the |
| 87 | * backend, only the pointer to the server will be updated. |
| 88 | */ |
| 89 | int get_backend_server(const char *bk_name, const char *sv_name, |
| 90 | struct proxy **bk, struct server **sv) |
| 91 | { |
| 92 | struct proxy *p; |
| 93 | struct server *s; |
Willy Tarreau | cfeaa47 | 2009-10-10 22:33:08 +0200 | [diff] [blame] | 94 | int pid, sid; |
Willy Tarreau | f395017 | 2009-10-10 18:35:51 +0200 | [diff] [blame] | 95 | |
| 96 | *sv = NULL; |
| 97 | |
Willy Tarreau | cfeaa47 | 2009-10-10 22:33:08 +0200 | [diff] [blame] | 98 | pid = 0; |
| 99 | if (*bk_name == '#') |
| 100 | pid = atoi(bk_name + 1); |
| 101 | sid = 0; |
| 102 | if (*sv_name == '#') |
| 103 | sid = atoi(sv_name + 1); |
| 104 | |
Willy Tarreau | f395017 | 2009-10-10 18:35:51 +0200 | [diff] [blame] | 105 | for (p = proxy; p; p = p->next) |
Willy Tarreau | cfeaa47 | 2009-10-10 22:33:08 +0200 | [diff] [blame] | 106 | if ((p->cap & PR_CAP_BE) && |
| 107 | ((pid && p->uuid == pid) || |
| 108 | (!pid && strcmp(p->id, bk_name) == 0))) |
Willy Tarreau | f395017 | 2009-10-10 18:35:51 +0200 | [diff] [blame] | 109 | break; |
| 110 | if (bk) |
| 111 | *bk = p; |
| 112 | if (!p) |
| 113 | return 0; |
| 114 | |
| 115 | for (s = p->srv; s; s = s->next) |
Willy Tarreau | cfeaa47 | 2009-10-10 22:33:08 +0200 | [diff] [blame] | 116 | if ((sid && s->puid == sid) || |
| 117 | (!sid && strcmp(s->id, sv_name) == 0)) |
Willy Tarreau | f395017 | 2009-10-10 18:35:51 +0200 | [diff] [blame] | 118 | break; |
| 119 | *sv = s; |
| 120 | if (!s) |
| 121 | return 0; |
| 122 | return 1; |
| 123 | } |
| 124 | |
Willy Tarreau | e219db7 | 2007-12-03 01:30:13 +0100 | [diff] [blame] | 125 | /* This function parses a "timeout" statement in a proxy section. It returns |
| 126 | * -1 if there is any error, 1 for a warning, otherwise zero. If it does not |
| 127 | * return zero, it may write an error message into the <err> buffer, for at |
| 128 | * most <errlen> bytes, trailing zero included. The trailing '\n' must not |
| 129 | * be written. The function must be called with <args> pointing to the first |
Willy Tarreau | 9de1bbd | 2008-07-09 20:34:27 +0200 | [diff] [blame] | 130 | * command line word, with <proxy> pointing to the proxy being parsed, and |
Willy Tarreau | e219db7 | 2007-12-03 01:30:13 +0100 | [diff] [blame] | 131 | * <defpx> to the default proxy or NULL. As a special case for compatibility |
| 132 | * with older configs, it also accepts "{cli|srv|con}timeout" in args[0]. |
| 133 | */ |
Willy Tarreau | 9de1bbd | 2008-07-09 20:34:27 +0200 | [diff] [blame] | 134 | static int proxy_parse_timeout(char **args, int section, struct proxy *proxy, |
| 135 | struct proxy *defpx, char *err, int errlen) |
Willy Tarreau | e219db7 | 2007-12-03 01:30:13 +0100 | [diff] [blame] | 136 | { |
| 137 | unsigned timeout; |
| 138 | int retval, cap; |
| 139 | const char *res, *name; |
Willy Tarreau | 0c303ee | 2008-07-07 00:09:58 +0200 | [diff] [blame] | 140 | int *tv = NULL; |
| 141 | int *td = NULL; |
Willy Tarreau | e219db7 | 2007-12-03 01:30:13 +0100 | [diff] [blame] | 142 | |
| 143 | retval = 0; |
Willy Tarreau | 9de1bbd | 2008-07-09 20:34:27 +0200 | [diff] [blame] | 144 | |
| 145 | /* simply skip "timeout" but remain compatible with old form */ |
| 146 | if (strcmp(args[0], "timeout") == 0) |
| 147 | args++; |
| 148 | |
Willy Tarreau | e219db7 | 2007-12-03 01:30:13 +0100 | [diff] [blame] | 149 | name = args[0]; |
| 150 | if (!strcmp(args[0], "client") || !strcmp(args[0], "clitimeout")) { |
| 151 | name = "client"; |
Willy Tarreau | d7c30f9 | 2007-12-03 01:38:36 +0100 | [diff] [blame] | 152 | tv = &proxy->timeout.client; |
| 153 | td = &defpx->timeout.client; |
Willy Tarreau | e219db7 | 2007-12-03 01:30:13 +0100 | [diff] [blame] | 154 | cap = PR_CAP_FE; |
| 155 | } else if (!strcmp(args[0], "tarpit")) { |
| 156 | tv = &proxy->timeout.tarpit; |
| 157 | td = &defpx->timeout.tarpit; |
Willy Tarreau | 51c9bde | 2008-01-06 13:40:03 +0100 | [diff] [blame] | 158 | cap = PR_CAP_FE | PR_CAP_BE; |
Willy Tarreau | b16a574 | 2010-01-10 14:46:16 +0100 | [diff] [blame] | 159 | } else if (!strcmp(args[0], "http-keep-alive")) { |
| 160 | tv = &proxy->timeout.httpka; |
| 161 | td = &defpx->timeout.httpka; |
| 162 | cap = PR_CAP_FE | PR_CAP_BE; |
Willy Tarreau | 036fae0 | 2008-01-06 13:24:40 +0100 | [diff] [blame] | 163 | } else if (!strcmp(args[0], "http-request")) { |
| 164 | tv = &proxy->timeout.httpreq; |
| 165 | td = &defpx->timeout.httpreq; |
Willy Tarreau | cd7afc0 | 2009-07-12 10:03:17 +0200 | [diff] [blame] | 166 | cap = PR_CAP_FE | PR_CAP_BE; |
Willy Tarreau | e219db7 | 2007-12-03 01:30:13 +0100 | [diff] [blame] | 167 | } else if (!strcmp(args[0], "server") || !strcmp(args[0], "srvtimeout")) { |
| 168 | name = "server"; |
Willy Tarreau | d7c30f9 | 2007-12-03 01:38:36 +0100 | [diff] [blame] | 169 | tv = &proxy->timeout.server; |
| 170 | td = &defpx->timeout.server; |
Willy Tarreau | e219db7 | 2007-12-03 01:30:13 +0100 | [diff] [blame] | 171 | cap = PR_CAP_BE; |
| 172 | } else if (!strcmp(args[0], "connect") || !strcmp(args[0], "contimeout")) { |
| 173 | name = "connect"; |
Willy Tarreau | d7c30f9 | 2007-12-03 01:38:36 +0100 | [diff] [blame] | 174 | tv = &proxy->timeout.connect; |
| 175 | td = &defpx->timeout.connect; |
Willy Tarreau | e219db7 | 2007-12-03 01:30:13 +0100 | [diff] [blame] | 176 | cap = PR_CAP_BE; |
Krzysztof Piotr Oledzki | 5259dfe | 2008-01-21 01:54:06 +0100 | [diff] [blame] | 177 | } else if (!strcmp(args[0], "check")) { |
| 178 | tv = &proxy->timeout.check; |
| 179 | td = &defpx->timeout.check; |
| 180 | cap = PR_CAP_BE; |
Willy Tarreau | e219db7 | 2007-12-03 01:30:13 +0100 | [diff] [blame] | 181 | } else if (!strcmp(args[0], "queue")) { |
| 182 | tv = &proxy->timeout.queue; |
| 183 | td = &defpx->timeout.queue; |
| 184 | cap = PR_CAP_BE; |
| 185 | } else { |
Willy Tarreau | 036fae0 | 2008-01-06 13:24:40 +0100 | [diff] [blame] | 186 | snprintf(err, errlen, |
Krzysztof Piotr Oledzki | 5259dfe | 2008-01-21 01:54:06 +0100 | [diff] [blame] | 187 | "timeout '%s': must be 'client', 'server', 'connect', 'check', " |
Willy Tarreau | 76bfc95 | 2010-01-10 17:48:11 +0100 | [diff] [blame] | 188 | "'queue', 'http-keep-alive', 'http-request' or 'tarpit'", |
Willy Tarreau | e219db7 | 2007-12-03 01:30:13 +0100 | [diff] [blame] | 189 | args[0]); |
| 190 | return -1; |
| 191 | } |
| 192 | |
| 193 | if (*args[1] == 0) { |
| 194 | snprintf(err, errlen, "%s timeout expects an integer value (in milliseconds)", name); |
| 195 | return -1; |
| 196 | } |
| 197 | |
| 198 | res = parse_time_err(args[1], &timeout, TIME_UNIT_MS); |
| 199 | if (res) { |
Willy Tarreau | bb9251e | 2009-03-06 08:05:40 +0100 | [diff] [blame] | 200 | snprintf(err, errlen, "unexpected character '%c' in %s timeout", *res, name); |
Willy Tarreau | e219db7 | 2007-12-03 01:30:13 +0100 | [diff] [blame] | 201 | return -1; |
| 202 | } |
| 203 | |
| 204 | if (!(proxy->cap & cap)) { |
| 205 | snprintf(err, errlen, "%s timeout will be ignored because %s '%s' has no %s capability", |
| 206 | name, proxy_type_str(proxy), proxy->id, |
| 207 | (cap & PR_CAP_BE) ? "backend" : "frontend"); |
| 208 | retval = 1; |
| 209 | } |
Willy Tarreau | 0c303ee | 2008-07-07 00:09:58 +0200 | [diff] [blame] | 210 | else if (defpx && *tv != *td) { |
Willy Tarreau | e219db7 | 2007-12-03 01:30:13 +0100 | [diff] [blame] | 211 | snprintf(err, errlen, "overwriting %s timeout which was already specified", name); |
| 212 | retval = 1; |
| 213 | } |
| 214 | |
Willy Tarreau | 0c303ee | 2008-07-07 00:09:58 +0200 | [diff] [blame] | 215 | *tv = MS_TO_TICKS(timeout); |
Willy Tarreau | e219db7 | 2007-12-03 01:30:13 +0100 | [diff] [blame] | 216 | return retval; |
| 217 | } |
| 218 | |
Willy Tarreau | 3a7d207 | 2009-03-05 23:48:25 +0100 | [diff] [blame] | 219 | /* This function parses a "rate-limit" statement in a proxy section. It returns |
| 220 | * -1 if there is any error, 1 for a warning, otherwise zero. If it does not |
| 221 | * return zero, it may write an error message into the <err> buffer, for at |
| 222 | * most <errlen> bytes, trailing zero included. The trailing '\n' must not |
| 223 | * be written. The function must be called with <args> pointing to the first |
| 224 | * command line word, with <proxy> pointing to the proxy being parsed, and |
| 225 | * <defpx> to the default proxy or NULL. |
| 226 | */ |
| 227 | static int proxy_parse_rate_limit(char **args, int section, struct proxy *proxy, |
| 228 | struct proxy *defpx, char *err, int errlen) |
| 229 | { |
| 230 | int retval, cap; |
| 231 | char *res, *name; |
| 232 | unsigned int *tv = NULL; |
| 233 | unsigned int *td = NULL; |
| 234 | unsigned int val; |
| 235 | |
| 236 | retval = 0; |
| 237 | |
| 238 | /* simply skip "rate-limit" */ |
| 239 | if (strcmp(args[0], "rate-limit") == 0) |
| 240 | args++; |
| 241 | |
| 242 | name = args[0]; |
| 243 | if (!strcmp(args[0], "sessions")) { |
| 244 | name = "sessions"; |
Willy Tarreau | 13a34bd | 2009-05-10 18:52:49 +0200 | [diff] [blame] | 245 | tv = &proxy->fe_sps_lim; |
| 246 | td = &defpx->fe_sps_lim; |
Willy Tarreau | 3a7d207 | 2009-03-05 23:48:25 +0100 | [diff] [blame] | 247 | cap = PR_CAP_FE; |
| 248 | } else { |
| 249 | snprintf(err, errlen, |
| 250 | "%s '%s': must be 'sessions'", |
| 251 | "rate-limit", args[0]); |
| 252 | return -1; |
| 253 | } |
| 254 | |
| 255 | if (*args[1] == 0) { |
| 256 | snprintf(err, errlen, "%s %s expects expects an integer value (in sessions/second)", "rate-limit", name); |
| 257 | return -1; |
| 258 | } |
| 259 | |
| 260 | val = strtoul(args[1], &res, 0); |
| 261 | if (*res) { |
| 262 | snprintf(err, errlen, "%s %s: unexpected character '%c' in integer value '%s'", "rate-limit", name, *res, args[1]); |
| 263 | return -1; |
| 264 | } |
| 265 | |
| 266 | if (!(proxy->cap & cap)) { |
| 267 | snprintf(err, errlen, "%s %s will be ignored because %s '%s' has no %s capability", |
| 268 | "rate-limit", name, proxy_type_str(proxy), proxy->id, |
| 269 | (cap & PR_CAP_BE) ? "backend" : "frontend"); |
| 270 | retval = 1; |
| 271 | } |
| 272 | else if (defpx && *tv != *td) { |
| 273 | snprintf(err, errlen, "overwriting %s %s which was already specified", "rate-limit", name); |
| 274 | retval = 1; |
| 275 | } |
| 276 | |
| 277 | *tv = val; |
| 278 | return retval; |
| 279 | } |
| 280 | |
Krzysztof Piotr Oledzki | 6eb730d | 2007-11-03 23:41:58 +0100 | [diff] [blame] | 281 | /* |
| 282 | * This function finds a proxy with matching name, mode and with satisfying |
| 283 | * capabilities. It also checks if there are more matching proxies with |
| 284 | * requested name as this often leads into unexpected situations. |
| 285 | */ |
| 286 | |
Alex Williams | 96532db | 2009-11-01 21:27:13 -0500 | [diff] [blame] | 287 | struct proxy *findproxy_mode(const char *name, int mode, int cap) { |
Krzysztof Piotr Oledzki | 6eb730d | 2007-11-03 23:41:58 +0100 | [diff] [blame] | 288 | |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 289 | struct proxy *curproxy, *target = NULL; |
Krzysztof Piotr Oledzki | 6eb730d | 2007-11-03 23:41:58 +0100 | [diff] [blame] | 290 | |
| 291 | for (curproxy = proxy; curproxy; curproxy = curproxy->next) { |
| 292 | if ((curproxy->cap & cap)!=cap || strcmp(curproxy->id, name)) |
| 293 | continue; |
| 294 | |
Willy Tarreau | 51aecc7 | 2009-07-12 09:47:04 +0200 | [diff] [blame] | 295 | if (curproxy->mode != mode && |
| 296 | !(curproxy->mode == PR_MODE_HTTP && mode == PR_MODE_TCP)) { |
Krzysztof Piotr Oledzki | 6eb730d | 2007-11-03 23:41:58 +0100 | [diff] [blame] | 297 | Alert("Unable to use proxy '%s' with wrong mode, required: %s, has: %s.\n", |
| 298 | name, proxy_mode_str(mode), proxy_mode_str(curproxy->mode)); |
| 299 | Alert("You may want to use 'mode %s'.\n", proxy_mode_str(mode)); |
| 300 | return NULL; |
| 301 | } |
| 302 | |
| 303 | if (!target) { |
| 304 | target = curproxy; |
| 305 | continue; |
| 306 | } |
| 307 | |
Willy Tarreau | 816eb54 | 2007-11-04 07:04:43 +0100 | [diff] [blame] | 308 | Alert("Refusing to use duplicated proxy '%s' with overlapping capabilities: %s/%s!\n", |
Krzysztof Piotr Oledzki | 6eb730d | 2007-11-03 23:41:58 +0100 | [diff] [blame] | 309 | name, proxy_type_str(curproxy), proxy_type_str(target)); |
| 310 | |
| 311 | return NULL; |
| 312 | } |
| 313 | |
| 314 | return target; |
| 315 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 316 | |
Alex Williams | 96532db | 2009-11-01 21:27:13 -0500 | [diff] [blame] | 317 | struct proxy *findproxy(const char *name, int cap) { |
| 318 | |
| 319 | struct proxy *curproxy, *target = NULL; |
| 320 | |
| 321 | for (curproxy = proxy; curproxy; curproxy = curproxy->next) { |
| 322 | if ((curproxy->cap & cap)!=cap || strcmp(curproxy->id, name)) |
| 323 | continue; |
| 324 | |
| 325 | if (!target) { |
| 326 | target = curproxy; |
| 327 | continue; |
| 328 | } |
| 329 | |
| 330 | return NULL; |
| 331 | } |
| 332 | |
| 333 | return target; |
| 334 | } |
| 335 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 336 | /* |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 337 | * This function finds a server with matching name within selected proxy. |
| 338 | * It also checks if there are more matching servers with |
| 339 | * requested name as this often leads into unexpected situations. |
| 340 | */ |
| 341 | |
| 342 | struct server *findserver(const struct proxy *px, const char *name) { |
| 343 | |
| 344 | struct server *cursrv, *target = NULL; |
| 345 | |
| 346 | if (!px) |
| 347 | return NULL; |
| 348 | |
| 349 | for (cursrv = px->srv; cursrv; cursrv = cursrv->next) { |
| 350 | if (strcmp(cursrv->id, name)) |
| 351 | continue; |
| 352 | |
| 353 | if (!target) { |
| 354 | target = cursrv; |
| 355 | continue; |
| 356 | } |
| 357 | |
| 358 | Alert("Refusing to use duplicated server '%s' fould in proxy: %s!\n", |
| 359 | name, px->id); |
| 360 | |
| 361 | return NULL; |
| 362 | } |
| 363 | |
| 364 | return target; |
| 365 | } |
| 366 | |
Willy Tarreau | ff01a21 | 2009-03-15 13:46:16 +0100 | [diff] [blame] | 367 | /* This function checks that the designated proxy has no http directives |
| 368 | * enabled. It will output a warning if there are, and will fix some of them. |
| 369 | * It returns the number of fatal errors encountered. This should be called |
| 370 | * at the end of the configuration parsing if the proxy is not in http mode. |
| 371 | * The <file> argument is used to construct the error message. |
| 372 | */ |
Willy Tarreau | 915e1eb | 2009-06-22 15:48:36 +0200 | [diff] [blame] | 373 | int proxy_cfg_ensure_no_http(struct proxy *curproxy) |
Willy Tarreau | ff01a21 | 2009-03-15 13:46:16 +0100 | [diff] [blame] | 374 | { |
| 375 | if (curproxy->cookie_name != NULL) { |
Willy Tarreau | 915e1eb | 2009-06-22 15:48:36 +0200 | [diff] [blame] | 376 | Warning("config : cookie will be ignored for %s '%s' (needs 'mode http').\n", |
| 377 | proxy_type_str(curproxy), curproxy->id); |
Willy Tarreau | ff01a21 | 2009-03-15 13:46:16 +0100 | [diff] [blame] | 378 | } |
| 379 | if (curproxy->rsp_exp != NULL) { |
Willy Tarreau | 915e1eb | 2009-06-22 15:48:36 +0200 | [diff] [blame] | 380 | Warning("config : server regular expressions will be ignored for %s '%s' (needs 'mode http').\n", |
| 381 | proxy_type_str(curproxy), curproxy->id); |
Willy Tarreau | ff01a21 | 2009-03-15 13:46:16 +0100 | [diff] [blame] | 382 | } |
| 383 | if (curproxy->req_exp != NULL) { |
Willy Tarreau | 915e1eb | 2009-06-22 15:48:36 +0200 | [diff] [blame] | 384 | Warning("config : client regular expressions will be ignored for %s '%s' (needs 'mode http').\n", |
| 385 | proxy_type_str(curproxy), curproxy->id); |
Willy Tarreau | ff01a21 | 2009-03-15 13:46:16 +0100 | [diff] [blame] | 386 | } |
| 387 | if (curproxy->monitor_uri != NULL) { |
Willy Tarreau | 915e1eb | 2009-06-22 15:48:36 +0200 | [diff] [blame] | 388 | Warning("config : monitor-uri will be ignored for %s '%s' (needs 'mode http').\n", |
| 389 | proxy_type_str(curproxy), curproxy->id); |
Willy Tarreau | ff01a21 | 2009-03-15 13:46:16 +0100 | [diff] [blame] | 390 | } |
Willy Tarreau | f3e49f9 | 2009-10-03 12:21:20 +0200 | [diff] [blame] | 391 | if (curproxy->lbprm.algo & BE_LB_NEED_HTTP) { |
Willy Tarreau | ff01a21 | 2009-03-15 13:46:16 +0100 | [diff] [blame] | 392 | curproxy->lbprm.algo &= ~BE_LB_ALGO; |
| 393 | curproxy->lbprm.algo |= BE_LB_ALGO_RR; |
Willy Tarreau | 915e1eb | 2009-06-22 15:48:36 +0200 | [diff] [blame] | 394 | Warning("config : Layer 7 hash not possible for %s '%s' (needs 'mode http'). Falling back to round robin.\n", |
| 395 | proxy_type_str(curproxy), curproxy->id); |
Willy Tarreau | ff01a21 | 2009-03-15 13:46:16 +0100 | [diff] [blame] | 396 | } |
Willy Tarreau | 1780416 | 2009-11-09 21:27:51 +0100 | [diff] [blame] | 397 | if (curproxy->to_log & (LW_REQ | LW_RESP)) { |
| 398 | curproxy->to_log &= ~(LW_REQ | LW_RESP); |
| 399 | Warning("config : 'option httplog' not usable with %s '%s' (needs 'mode http'). Falling back to 'option tcplog'.\n", |
| 400 | proxy_type_str(curproxy), curproxy->id); |
| 401 | } |
Willy Tarreau | ff01a21 | 2009-03-15 13:46:16 +0100 | [diff] [blame] | 402 | return 0; |
| 403 | } |
| 404 | |
Krzysztof Piotr Oledzki | c8b16fc | 2008-02-18 01:26:35 +0100 | [diff] [blame] | 405 | /* |
Willy Tarreau | 2ff7622 | 2007-04-09 19:29:56 +0200 | [diff] [blame] | 406 | * This function creates all proxy sockets. It should be done very early, |
| 407 | * typically before privileges are dropped. The sockets will be registered |
| 408 | * but not added to any fd_set, in order not to loose them across the fork(). |
| 409 | * The proxies also start in IDLE state, meaning that it will be |
| 410 | * maintain_proxies that will finally complete their loading. |
| 411 | * |
| 412 | * Its return value is composed from ERR_NONE, ERR_RETRYABLE and ERR_FATAL. |
| 413 | * Retryable errors will only be printed if <verbose> is not zero. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 414 | */ |
| 415 | int start_proxies(int verbose) |
| 416 | { |
| 417 | struct proxy *curproxy; |
| 418 | struct listener *listener; |
Willy Tarreau | e6b9894 | 2007-10-29 01:09:36 +0100 | [diff] [blame] | 419 | int lerr, err = ERR_NONE; |
| 420 | int pxerr; |
| 421 | char msg[100]; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 422 | |
| 423 | for (curproxy = proxy; curproxy != NULL; curproxy = curproxy->next) { |
| 424 | if (curproxy->state != PR_STNEW) |
| 425 | continue; /* already initialized */ |
| 426 | |
| 427 | pxerr = 0; |
| 428 | for (listener = curproxy->listen; listener != NULL; listener = listener->next) { |
Willy Tarreau | e6b9894 | 2007-10-29 01:09:36 +0100 | [diff] [blame] | 429 | if (listener->state != LI_ASSIGNED) |
| 430 | continue; /* already started */ |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 431 | |
Emeric Brun | cf20bf1 | 2010-10-22 16:06:11 +0200 | [diff] [blame] | 432 | lerr = listener->proto->bind(listener, msg, sizeof(msg)); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 433 | |
Willy Tarreau | e6b9894 | 2007-10-29 01:09:36 +0100 | [diff] [blame] | 434 | /* errors are reported if <verbose> is set or if they are fatal */ |
| 435 | if (verbose || (lerr & (ERR_FATAL | ERR_ABORT))) { |
| 436 | if (lerr & ERR_ALERT) |
| 437 | Alert("Starting %s %s: %s\n", |
| 438 | proxy_type_str(curproxy), curproxy->id, msg); |
| 439 | else if (lerr & ERR_WARN) |
| 440 | Warning("Starting %s %s: %s\n", |
| 441 | proxy_type_str(curproxy), curproxy->id, msg); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 442 | } |
| 443 | |
Willy Tarreau | e6b9894 | 2007-10-29 01:09:36 +0100 | [diff] [blame] | 444 | err |= lerr; |
| 445 | if (lerr & (ERR_ABORT | ERR_FATAL)) { |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 446 | pxerr |= 1; |
Willy Tarreau | e6b9894 | 2007-10-29 01:09:36 +0100 | [diff] [blame] | 447 | break; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 448 | } |
Willy Tarreau | e6b9894 | 2007-10-29 01:09:36 +0100 | [diff] [blame] | 449 | else if (lerr & ERR_CODE) { |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 450 | pxerr |= 1; |
| 451 | continue; |
| 452 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 453 | } |
| 454 | |
| 455 | if (!pxerr) { |
Willy Tarreau | 2ff7622 | 2007-04-09 19:29:56 +0200 | [diff] [blame] | 456 | curproxy->state = PR_STIDLE; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 457 | send_log(curproxy, LOG_NOTICE, "Proxy %s started.\n", curproxy->id); |
| 458 | } |
Willy Tarreau | e6b9894 | 2007-10-29 01:09:36 +0100 | [diff] [blame] | 459 | |
| 460 | if (err & ERR_ABORT) |
| 461 | break; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 462 | } |
| 463 | |
| 464 | return err; |
| 465 | } |
| 466 | |
| 467 | |
| 468 | /* |
| 469 | * this function enables proxies when there are enough free sessions, |
| 470 | * or stops them when the table is full. It is designed to be called from the |
Willy Tarreau | 58b458d | 2008-06-29 22:40:23 +0200 | [diff] [blame] | 471 | * select_loop(). It adjusts the date of next expiration event during stop |
| 472 | * time if appropriate. |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 473 | */ |
Willy Tarreau | 0c303ee | 2008-07-07 00:09:58 +0200 | [diff] [blame] | 474 | void maintain_proxies(int *next) |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 475 | { |
| 476 | struct proxy *p; |
| 477 | struct listener *l; |
Willy Tarreau | 7958422 | 2009-03-06 09:18:27 +0100 | [diff] [blame] | 478 | unsigned int wait; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 479 | |
| 480 | p = proxy; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 481 | |
| 482 | /* if there are enough free sessions, we'll activate proxies */ |
| 483 | if (actconn < global.maxconn) { |
Willy Tarreau | 3a7d207 | 2009-03-05 23:48:25 +0100 | [diff] [blame] | 484 | for (; p; p = p->next) { |
| 485 | /* check the various reasons we may find to block the frontend */ |
| 486 | if (p->feconn >= p->maxconn) |
| 487 | goto do_block; |
| 488 | |
Willy Tarreau | 13a34bd | 2009-05-10 18:52:49 +0200 | [diff] [blame] | 489 | if (p->fe_sps_lim && |
Willy Tarreau | d9bbe17 | 2010-06-07 10:40:48 +0200 | [diff] [blame] | 490 | (wait = next_event_delay(&p->fe_sess_per_sec, p->fe_sps_lim, 1))) { |
Willy Tarreau | 3a7d207 | 2009-03-05 23:48:25 +0100 | [diff] [blame] | 491 | /* we're blocking because a limit was reached on the number of |
| 492 | * requests/s on the frontend. We want to re-check ASAP, which |
Willy Tarreau | efcbc6e | 2009-03-06 08:27:10 +0100 | [diff] [blame] | 493 | * means in 1 ms before estimated expiration date, because the |
| 494 | * timer will have settled down. Note that we may already be in |
| 495 | * IDLE state here. |
Willy Tarreau | 3a7d207 | 2009-03-05 23:48:25 +0100 | [diff] [blame] | 496 | */ |
Willy Tarreau | efcbc6e | 2009-03-06 08:27:10 +0100 | [diff] [blame] | 497 | *next = tick_first(*next, tick_add(now_ms, wait)); |
Willy Tarreau | 3a7d207 | 2009-03-05 23:48:25 +0100 | [diff] [blame] | 498 | goto do_block; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 499 | } |
Willy Tarreau | 3a7d207 | 2009-03-05 23:48:25 +0100 | [diff] [blame] | 500 | |
| 501 | /* OK we have no reason to block, so let's unblock if we were blocking */ |
| 502 | if (p->state == PR_STIDLE) { |
| 503 | for (l = p->listen; l != NULL; l = l->next) |
| 504 | enable_listener(l); |
| 505 | p->state = PR_STRUN; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 506 | } |
Willy Tarreau | 3a7d207 | 2009-03-05 23:48:25 +0100 | [diff] [blame] | 507 | continue; |
| 508 | |
| 509 | do_block: |
| 510 | if (p->state == PR_STRUN) { |
| 511 | for (l = p->listen; l != NULL; l = l->next) |
| 512 | disable_listener(l); |
| 513 | p->state = PR_STIDLE; |
| 514 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 515 | } |
| 516 | } |
| 517 | else { /* block all proxies */ |
| 518 | while (p) { |
| 519 | if (p->state == PR_STRUN) { |
Willy Tarreau | e6b9894 | 2007-10-29 01:09:36 +0100 | [diff] [blame] | 520 | for (l = p->listen; l != NULL; l = l->next) |
| 521 | disable_listener(l); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 522 | p->state = PR_STIDLE; |
| 523 | } |
| 524 | p = p->next; |
| 525 | } |
| 526 | } |
| 527 | |
| 528 | if (stopping) { |
Emeric Brun | 5a8c0a9 | 2010-09-23 18:44:36 +0200 | [diff] [blame] | 529 | struct peers *prs; |
| 530 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 531 | p = proxy; |
| 532 | while (p) { |
| 533 | if (p->state != PR_STSTOPPED) { |
| 534 | int t; |
Willy Tarreau | 0c303ee | 2008-07-07 00:09:58 +0200 | [diff] [blame] | 535 | t = tick_remain(now_ms, p->stop_time); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 536 | if (t == 0) { |
Willy Tarreau | 1104614 | 2010-03-04 23:07:28 +0100 | [diff] [blame] | 537 | Warning("Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n", |
| 538 | p->id, p->counters.cum_feconn, p->counters.cum_beconn); |
| 539 | send_log(p, LOG_WARNING, "Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n", |
| 540 | p->id, p->counters.cum_feconn, p->counters.cum_beconn); |
Willy Tarreau | da250db | 2008-10-12 12:07:48 +0200 | [diff] [blame] | 541 | stop_proxy(p); |
Willy Tarreau | 4d2d098 | 2007-05-14 00:39:29 +0200 | [diff] [blame] | 542 | /* try to free more memory */ |
| 543 | pool_gc2(); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 544 | } |
| 545 | else { |
Willy Tarreau | 0c303ee | 2008-07-07 00:09:58 +0200 | [diff] [blame] | 546 | *next = tick_first(*next, p->stop_time); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 547 | } |
| 548 | } |
| 549 | p = p->next; |
| 550 | } |
Emeric Brun | 5a8c0a9 | 2010-09-23 18:44:36 +0200 | [diff] [blame] | 551 | |
| 552 | prs = peers; |
| 553 | while (prs) { |
| 554 | stop_proxy((struct proxy *)prs->peers_fe); |
| 555 | prs = prs->next; |
| 556 | } |
| 557 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 558 | } |
Willy Tarreau | d825eef | 2007-05-12 22:35:00 +0200 | [diff] [blame] | 559 | return; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 560 | } |
| 561 | |
| 562 | |
| 563 | /* |
| 564 | * this function disables health-check servers so that the process will quickly be ignored |
| 565 | * by load balancers. Note that if a proxy was already in the PAUSED state, then its grace |
| 566 | * time will not be used since it would already not listen anymore to the socket. |
| 567 | */ |
| 568 | void soft_stop(void) |
| 569 | { |
| 570 | struct proxy *p; |
| 571 | |
| 572 | stopping = 1; |
| 573 | p = proxy; |
Willy Tarreau | b0b37bc | 2008-06-23 14:00:57 +0200 | [diff] [blame] | 574 | tv_update_date(0,1); /* else, the old time before select will be used */ |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 575 | while (p) { |
| 576 | if (p->state != PR_STSTOPPED) { |
Willy Tarreau | f8fbcef | 2008-10-10 17:51:34 +0200 | [diff] [blame] | 577 | Warning("Stopping %s %s in %d ms.\n", proxy_cap_str(p->cap), p->id, p->grace); |
| 578 | send_log(p, LOG_WARNING, "Stopping %s %s in %d ms.\n", proxy_cap_str(p->cap), p->id, p->grace); |
Willy Tarreau | 0c303ee | 2008-07-07 00:09:58 +0200 | [diff] [blame] | 579 | p->stop_time = tick_add(now_ms, p->grace); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 580 | } |
Emeric Brun | 5a8c0a9 | 2010-09-23 18:44:36 +0200 | [diff] [blame] | 581 | if (p->table.size && p->table.sync_task) |
| 582 | task_wakeup(p->table.sync_task, TASK_WOKEN_MSG); |
| 583 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 584 | p = p->next; |
| 585 | } |
Willy Tarreau | d0807c3 | 2010-08-27 18:26:11 +0200 | [diff] [blame] | 586 | /* signal zero is used to broadcast the "stopping" event */ |
| 587 | signal_handler(0); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 588 | } |
| 589 | |
| 590 | |
| 591 | /* |
| 592 | * Linux unbinds the listen socket after a SHUT_RD, and ignores SHUT_WR. |
| 593 | * Solaris refuses either shutdown(). |
| 594 | * OpenBSD ignores SHUT_RD but closes upon SHUT_WR and refuses to rebind. |
| 595 | * So a common validation path involves SHUT_WR && listen && SHUT_RD. |
| 596 | * If disabling at least one listener returns an error, then the proxy |
| 597 | * state is set to PR_STERROR because we don't know how to resume from this. |
| 598 | */ |
| 599 | void pause_proxy(struct proxy *p) |
| 600 | { |
| 601 | struct listener *l; |
| 602 | for (l = p->listen; l != NULL; l = l->next) { |
| 603 | if (shutdown(l->fd, SHUT_WR) == 0 && |
Willy Tarreau | c73ce2b | 2008-01-06 10:55:10 +0100 | [diff] [blame] | 604 | listen(l->fd, p->backlog ? p->backlog : p->maxconn) == 0 && |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 605 | shutdown(l->fd, SHUT_RD) == 0) { |
Willy Tarreau | f161a34 | 2007-04-08 16:59:42 +0200 | [diff] [blame] | 606 | EV_FD_CLR(l->fd, DIR_RD); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 607 | if (p->state != PR_STERROR) |
| 608 | p->state = PR_STPAUSED; |
| 609 | } |
| 610 | else |
| 611 | p->state = PR_STERROR; |
| 612 | } |
Willy Tarreau | da250db | 2008-10-12 12:07:48 +0200 | [diff] [blame] | 613 | } |
| 614 | |
| 615 | |
| 616 | /* |
| 617 | * This function completely stops a proxy and releases its listeners. It has |
| 618 | * to be called when going down in order to release the ports so that another |
| 619 | * process may bind to them. It must also be called on disabled proxies at the |
| 620 | * end of start-up. When all listeners are closed, the proxy is set to the |
| 621 | * PR_STSTOPPED state. |
| 622 | */ |
| 623 | void stop_proxy(struct proxy *p) |
| 624 | { |
| 625 | struct listener *l; |
| 626 | |
| 627 | for (l = p->listen; l != NULL; l = l->next) { |
| 628 | unbind_listener(l); |
| 629 | if (l->state >= LI_ASSIGNED) { |
| 630 | delete_listener(l); |
| 631 | listeners--; |
Willy Tarreau | af7ad00 | 2010-08-31 15:39:26 +0200 | [diff] [blame] | 632 | jobs--; |
Willy Tarreau | da250db | 2008-10-12 12:07:48 +0200 | [diff] [blame] | 633 | } |
| 634 | } |
| 635 | p->state = PR_STSTOPPED; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 636 | } |
| 637 | |
| 638 | /* |
| 639 | * This function temporarily disables listening so that another new instance |
| 640 | * can start listening. It is designed to be called upon reception of a |
| 641 | * SIGTTOU, after which either a SIGUSR1 can be sent to completely stop |
| 642 | * the proxy, or a SIGTTIN can be sent to listen again. |
| 643 | */ |
| 644 | void pause_proxies(void) |
| 645 | { |
| 646 | int err; |
| 647 | struct proxy *p; |
Emeric Brun | 5a8c0a9 | 2010-09-23 18:44:36 +0200 | [diff] [blame] | 648 | struct peers *prs; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 649 | |
| 650 | err = 0; |
| 651 | p = proxy; |
Willy Tarreau | b0b37bc | 2008-06-23 14:00:57 +0200 | [diff] [blame] | 652 | tv_update_date(0,1); /* else, the old time before select will be used */ |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 653 | while (p) { |
Willy Tarreau | f8fbcef | 2008-10-10 17:51:34 +0200 | [diff] [blame] | 654 | if (p->cap & PR_CAP_FE && |
| 655 | p->state != PR_STERROR && |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 656 | p->state != PR_STSTOPPED && |
| 657 | p->state != PR_STPAUSED) { |
Willy Tarreau | f8fbcef | 2008-10-10 17:51:34 +0200 | [diff] [blame] | 658 | Warning("Pausing %s %s.\n", proxy_cap_str(p->cap), p->id); |
| 659 | send_log(p, LOG_WARNING, "Pausing %s %s.\n", proxy_cap_str(p->cap), p->id); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 660 | pause_proxy(p); |
| 661 | if (p->state != PR_STPAUSED) { |
| 662 | err |= 1; |
Willy Tarreau | f8fbcef | 2008-10-10 17:51:34 +0200 | [diff] [blame] | 663 | Warning("%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id); |
| 664 | send_log(p, LOG_WARNING, "%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 665 | } |
| 666 | } |
| 667 | p = p->next; |
| 668 | } |
Emeric Brun | 5a8c0a9 | 2010-09-23 18:44:36 +0200 | [diff] [blame] | 669 | |
| 670 | prs = peers; |
| 671 | while (prs) { |
| 672 | p = prs->peers_fe; |
| 673 | if (p && (p->cap & PR_CAP_FE && |
| 674 | p->state != PR_STERROR && |
| 675 | p->state != PR_STSTOPPED && |
| 676 | p->state != PR_STPAUSED)) { |
| 677 | Warning("Pausing %s %s.\n", proxy_cap_str(p->cap), p->id); |
| 678 | send_log(p, LOG_WARNING, "Pausing %s %s.\n", proxy_cap_str(p->cap), p->id); |
| 679 | pause_proxy(p); |
| 680 | if (p->state != PR_STPAUSED) { |
| 681 | err |= 1; |
| 682 | Warning("%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id); |
| 683 | send_log(p, LOG_WARNING, "%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id); |
| 684 | } |
| 685 | } |
| 686 | prs = prs->next; |
| 687 | } |
| 688 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 689 | if (err) { |
| 690 | Warning("Some proxies refused to pause, performing soft stop now.\n"); |
| 691 | send_log(p, LOG_WARNING, "Some proxies refused to pause, performing soft stop now.\n"); |
| 692 | soft_stop(); |
| 693 | } |
| 694 | } |
| 695 | |
| 696 | |
| 697 | /* |
| 698 | * This function reactivates listening. This can be used after a call to |
| 699 | * sig_pause(), for example when a new instance has failed starting up. |
| 700 | * It is designed to be called upon reception of a SIGTTIN. |
| 701 | */ |
| 702 | void listen_proxies(void) |
| 703 | { |
| 704 | struct proxy *p; |
| 705 | struct listener *l; |
| 706 | |
| 707 | p = proxy; |
Willy Tarreau | b0b37bc | 2008-06-23 14:00:57 +0200 | [diff] [blame] | 708 | tv_update_date(0,1); /* else, the old time before select will be used */ |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 709 | while (p) { |
| 710 | if (p->state == PR_STPAUSED) { |
Willy Tarreau | f8fbcef | 2008-10-10 17:51:34 +0200 | [diff] [blame] | 711 | Warning("Enabling %s %s.\n", proxy_cap_str(p->cap), p->id); |
| 712 | send_log(p, LOG_WARNING, "Enabling %s %s.\n", proxy_cap_str(p->cap), p->id); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 713 | |
| 714 | for (l = p->listen; l != NULL; l = l->next) { |
Willy Tarreau | c73ce2b | 2008-01-06 10:55:10 +0100 | [diff] [blame] | 715 | if (listen(l->fd, p->backlog ? p->backlog : p->maxconn) == 0) { |
Willy Tarreau | f1221aa | 2006-12-17 22:14:12 +0100 | [diff] [blame] | 716 | if (actconn < global.maxconn && p->feconn < p->maxconn) { |
Willy Tarreau | f161a34 | 2007-04-08 16:59:42 +0200 | [diff] [blame] | 717 | EV_FD_SET(l->fd, DIR_RD); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 718 | p->state = PR_STRUN; |
| 719 | } |
| 720 | else |
| 721 | p->state = PR_STIDLE; |
| 722 | } else { |
| 723 | int port; |
| 724 | |
Emeric Brun | 0aaccf8 | 2010-10-22 17:42:55 +0200 | [diff] [blame] | 725 | if (l->addr.ss_family == AF_INET6) { |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 726 | port = ntohs(((struct sockaddr_in6 *)(&l->addr))->sin6_port); |
Emeric Brun | 0aaccf8 | 2010-10-22 17:42:55 +0200 | [diff] [blame] | 727 | Warning("Port %d busy while trying to enable %s %s.\n", |
| 728 | port, proxy_cap_str(p->cap), p->id); |
| 729 | send_log(p, LOG_WARNING, "Port %d busy while trying to enable %s %s.\n", |
| 730 | port, proxy_cap_str(p->cap), p->id); |
| 731 | } |
| 732 | else if (l->addr.ss_family == AF_INET) { |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 733 | port = ntohs(((struct sockaddr_in *)(&l->addr))->sin_port); |
Emeric Brun | 0aaccf8 | 2010-10-22 17:42:55 +0200 | [diff] [blame] | 734 | Warning("Port %d busy while trying to enable %s %s.\n", |
| 735 | port, proxy_cap_str(p->cap), p->id); |
| 736 | send_log(p, LOG_WARNING, "Port %d busy while trying to enable %s %s.\n", |
| 737 | port, proxy_cap_str(p->cap), p->id); |
| 738 | } |
| 739 | else { |
| 740 | Warning("Bind on socket %d busy while trying to enable %s %s.\n", |
| 741 | l->luid, proxy_cap_str(p->cap), p->id); |
| 742 | send_log(p, LOG_WARNING, "Bind on socket %d busy while trying to enable %s %s.\n", |
| 743 | l->luid, proxy_cap_str(p->cap), p->id); |
| 744 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 745 | |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 746 | /* Another port might have been enabled. Let's stop everything. */ |
| 747 | pause_proxy(p); |
| 748 | break; |
| 749 | } |
| 750 | } |
| 751 | } |
| 752 | p = p->next; |
| 753 | } |
| 754 | } |
| 755 | |
Willy Tarreau | 1d0dfb1 | 2009-07-07 15:10:31 +0200 | [diff] [blame] | 756 | /* Set current session's backend to <be>. Nothing is done if the |
| 757 | * session already had a backend assigned, which is indicated by |
| 758 | * s->flags & SN_BE_ASSIGNED. |
| 759 | * All flags, stats and counters which need be updated are updated. |
Willy Tarreau | bedb9ba | 2009-07-12 08:27:39 +0200 | [diff] [blame] | 760 | * Returns 1 if done, 0 in case of internal error, eg: lack of resource. |
Willy Tarreau | 1d0dfb1 | 2009-07-07 15:10:31 +0200 | [diff] [blame] | 761 | */ |
Willy Tarreau | bedb9ba | 2009-07-12 08:27:39 +0200 | [diff] [blame] | 762 | int session_set_backend(struct session *s, struct proxy *be) |
Willy Tarreau | 1d0dfb1 | 2009-07-07 15:10:31 +0200 | [diff] [blame] | 763 | { |
| 764 | if (s->flags & SN_BE_ASSIGNED) |
Willy Tarreau | bedb9ba | 2009-07-12 08:27:39 +0200 | [diff] [blame] | 765 | return 1; |
Willy Tarreau | 1d0dfb1 | 2009-07-07 15:10:31 +0200 | [diff] [blame] | 766 | s->be = be; |
| 767 | be->beconn++; |
Krzysztof Piotr Oledzki | 052d4fd | 2009-10-04 14:52:57 +0200 | [diff] [blame] | 768 | if (be->beconn > be->counters.beconn_max) |
| 769 | be->counters.beconn_max = be->beconn; |
Willy Tarreau | 1d0dfb1 | 2009-07-07 15:10:31 +0200 | [diff] [blame] | 770 | proxy_inc_be_ctr(be); |
| 771 | |
| 772 | /* assign new parameters to the session from the new backend */ |
Willy Tarreau | f27b5ea | 2009-10-03 22:01:18 +0200 | [diff] [blame] | 773 | s->si[1].flags &= ~SI_FL_INDEP_STR; |
| 774 | if (be->options2 & PR_O2_INDEPSTR) |
| 775 | s->si[1].flags |= SI_FL_INDEP_STR; |
| 776 | |
Willy Tarreau | 1d0dfb1 | 2009-07-07 15:10:31 +0200 | [diff] [blame] | 777 | if (be->options2 & PR_O2_RSPBUG_OK) |
| 778 | s->txn.rsp.err_pos = -1; /* let buggy responses pass */ |
| 779 | s->flags |= SN_BE_ASSIGNED; |
Willy Tarreau | 51aecc7 | 2009-07-12 09:47:04 +0200 | [diff] [blame] | 780 | |
| 781 | /* If the target backend requires HTTP processing, we have to allocate |
| 782 | * a struct hdr_idx for it if we did not have one. |
| 783 | */ |
| 784 | if (unlikely(!s->txn.hdr_idx.v && (be->acl_requires & ACL_USE_L7_ANY))) { |
| 785 | if ((s->txn.hdr_idx.v = pool_alloc2(s->fe->hdr_idx_pool)) == NULL) |
| 786 | return 0; /* not enough memory */ |
Willy Tarreau | 39e4f62 | 2010-05-31 17:01:36 +0200 | [diff] [blame] | 787 | |
| 788 | /* and now initialize the HTTP transaction state */ |
| 789 | http_init_txn(s); |
| 790 | |
Willy Tarreau | 51aecc7 | 2009-07-12 09:47:04 +0200 | [diff] [blame] | 791 | s->txn.hdr_idx.size = MAX_HTTP_HDR; |
| 792 | hdr_idx_init(&s->txn.hdr_idx); |
| 793 | } |
| 794 | |
Willy Tarreau | c1a2167 | 2009-08-16 22:37:44 +0200 | [diff] [blame] | 795 | /* We want to enable the backend-specific analysers except those which |
| 796 | * were already run as part of the frontend/listener. Note that it would |
| 797 | * be more reliable to store the list of analysers that have been run, |
| 798 | * but what we do here is OK for now. |
Emeric Brun | 647caf1 | 2009-06-30 17:57:00 +0200 | [diff] [blame] | 799 | */ |
Willy Tarreau | c1a2167 | 2009-08-16 22:37:44 +0200 | [diff] [blame] | 800 | s->req->analysers |= be->be_req_ana & ~(s->listener->analysers); |
Emeric Brun | 647caf1 | 2009-06-30 17:57:00 +0200 | [diff] [blame] | 801 | |
Willy Tarreau | bedb9ba | 2009-07-12 08:27:39 +0200 | [diff] [blame] | 802 | return 1; |
Willy Tarreau | 1d0dfb1 | 2009-07-07 15:10:31 +0200 | [diff] [blame] | 803 | } |
| 804 | |
Willy Tarreau | 9de1bbd | 2008-07-09 20:34:27 +0200 | [diff] [blame] | 805 | static struct cfg_kw_list cfg_kws = {{ },{ |
| 806 | { CFG_LISTEN, "timeout", proxy_parse_timeout }, |
| 807 | { CFG_LISTEN, "clitimeout", proxy_parse_timeout }, |
| 808 | { CFG_LISTEN, "contimeout", proxy_parse_timeout }, |
| 809 | { CFG_LISTEN, "srvtimeout", proxy_parse_timeout }, |
Willy Tarreau | 3a7d207 | 2009-03-05 23:48:25 +0100 | [diff] [blame] | 810 | { CFG_LISTEN, "rate-limit", proxy_parse_rate_limit }, |
Willy Tarreau | 9de1bbd | 2008-07-09 20:34:27 +0200 | [diff] [blame] | 811 | { 0, NULL, NULL }, |
| 812 | }}; |
| 813 | |
| 814 | __attribute__((constructor)) |
| 815 | static void __proxy_module_init(void) |
| 816 | { |
| 817 | cfg_register_keywords(&cfg_kws); |
| 818 | } |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 819 | |
| 820 | /* |
| 821 | * Local variables: |
| 822 | * c-indent-level: 8 |
| 823 | * c-basic-offset: 8 |
| 824 | * End: |
| 825 | */ |