| /* |
| * Proxy variables and functions. |
| * |
| * Copyright 2000-2009 Willy Tarreau <w@1wt.eu> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| * |
| */ |
| |
| #include <fcntl.h> |
| #include <unistd.h> |
| #include <string.h> |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| #include <sys/stat.h> |
| |
| #include <common/defaults.h> |
| #include <common/cfgparse.h> |
| #include <common/compat.h> |
| #include <common/config.h> |
| #include <common/errors.h> |
| #include <common/memory.h> |
| #include <common/time.h> |
| |
| #include <eb32tree.h> |
| #include <ebistree.h> |
| |
| #include <types/capture.h> |
| #include <types/cli.h> |
| #include <types/global.h> |
| #include <types/obj_type.h> |
| #include <types/peers.h> |
| #include <types/stats.h> |
| |
| #include <proto/applet.h> |
| #include <proto/cli.h> |
| #include <proto/backend.h> |
| #include <proto/fd.h> |
| #include <proto/filters.h> |
| #include <proto/hdr_idx.h> |
| #include <proto/listener.h> |
| #include <proto/log.h> |
| #include <proto/proto_tcp.h> |
| #include <proto/proto_http.h> |
| #include <proto/proxy.h> |
| #include <proto/server.h> |
| #include <proto/signal.h> |
| #include <proto/stream.h> |
| #include <proto/stream_interface.h> |
| #include <proto/task.h> |
| |
| |
| int listeners; /* # of proxy listeners, set by cfgparse */ |
| struct proxy *proxy = NULL; /* list of all existing proxies */ |
| struct eb_root used_proxy_id = EB_ROOT; /* list of proxy IDs in use */ |
| struct eb_root proxy_by_name = EB_ROOT; /* tree of proxies sorted by name */ |
| unsigned int error_snapshot_id = 0; /* global ID assigned to each error then incremented */ |
| |
| /* |
| * This function returns a string containing a name describing capabilities to |
| * report comprehensible error messages. Specifically, it will return the words |
| * "frontend", "backend" when appropriate, or "proxy" for all other |
| * cases including the proxies declared in "listen" mode. |
| */ |
| const char *proxy_cap_str(int cap) |
| { |
| if ((cap & PR_CAP_LISTEN) != PR_CAP_LISTEN) { |
| if (cap & PR_CAP_FE) |
| return "frontend"; |
| else if (cap & PR_CAP_BE) |
| return "backend"; |
| } |
| return "proxy"; |
| } |
| |
| /* |
| * This function returns a string containing the mode of the proxy in a format |
| * suitable for error messages. |
| */ |
| const char *proxy_mode_str(int mode) { |
| |
| if (mode == PR_MODE_TCP) |
| return "tcp"; |
| else if (mode == PR_MODE_HTTP) |
| return "http"; |
| else if (mode == PR_MODE_HEALTH) |
| return "health"; |
| else |
| return "unknown"; |
| } |
| |
| /* |
| * This function scans the list of backends and servers to retrieve the first |
| * backend and the first server with the given names, and sets them in both |
| * parameters. It returns zero if either is not found, or non-zero and sets |
| * the ones it did not found to NULL. If a NULL pointer is passed for the |
| * backend, only the pointer to the server will be updated. |
| */ |
| int get_backend_server(const char *bk_name, const char *sv_name, |
| struct proxy **bk, struct server **sv) |
| { |
| struct proxy *p; |
| struct server *s; |
| int sid; |
| |
| *sv = NULL; |
| |
| sid = -1; |
| if (*sv_name == '#') |
| sid = atoi(sv_name + 1); |
| |
| p = proxy_be_by_name(bk_name); |
| if (bk) |
| *bk = p; |
| if (!p) |
| return 0; |
| |
| for (s = p->srv; s; s = s->next) |
| if ((sid >= 0 && s->puid == sid) || |
| (sid < 0 && strcmp(s->id, sv_name) == 0)) |
| break; |
| *sv = s; |
| if (!s) |
| return 0; |
| return 1; |
| } |
| |
| /* This function parses a "timeout" statement in a proxy section. It returns |
| * -1 if there is any error, 1 for a warning, otherwise zero. If it does not |
| * return zero, it will write an error or warning message into a preallocated |
| * buffer returned at <err>. The trailing is not be written. The function must |
| * be called with <args> pointing to the first command line word, with <proxy> |
| * pointing to the proxy being parsed, and <defpx> to the default proxy or NULL. |
| * As a special case for compatibility with older configs, it also accepts |
| * "{cli|srv|con}timeout" in args[0]. |
| */ |
| static int proxy_parse_timeout(char **args, int section, struct proxy *proxy, |
| struct proxy *defpx, const char *file, int line, |
| char **err) |
| { |
| unsigned timeout; |
| int retval, cap; |
| const char *res, *name; |
| int *tv = NULL; |
| int *td = NULL; |
| int warn = 0; |
| |
| retval = 0; |
| |
| /* simply skip "timeout" but remain compatible with old form */ |
| if (strcmp(args[0], "timeout") == 0) |
| args++; |
| |
| name = args[0]; |
| if (!strcmp(args[0], "client") || (!strcmp(args[0], "clitimeout") && (warn = WARN_CLITO_DEPRECATED))) { |
| name = "client"; |
| tv = &proxy->timeout.client; |
| td = &defpx->timeout.client; |
| cap = PR_CAP_FE; |
| } else if (!strcmp(args[0], "tarpit")) { |
| tv = &proxy->timeout.tarpit; |
| td = &defpx->timeout.tarpit; |
| cap = PR_CAP_FE | PR_CAP_BE; |
| } else if (!strcmp(args[0], "http-keep-alive")) { |
| tv = &proxy->timeout.httpka; |
| td = &defpx->timeout.httpka; |
| cap = PR_CAP_FE | PR_CAP_BE; |
| } else if (!strcmp(args[0], "http-request")) { |
| tv = &proxy->timeout.httpreq; |
| td = &defpx->timeout.httpreq; |
| cap = PR_CAP_FE | PR_CAP_BE; |
| } else if (!strcmp(args[0], "server") || (!strcmp(args[0], "srvtimeout") && (warn = WARN_SRVTO_DEPRECATED))) { |
| name = "server"; |
| tv = &proxy->timeout.server; |
| td = &defpx->timeout.server; |
| cap = PR_CAP_BE; |
| } else if (!strcmp(args[0], "connect") || (!strcmp(args[0], "contimeout") && (warn = WARN_CONTO_DEPRECATED))) { |
| name = "connect"; |
| tv = &proxy->timeout.connect; |
| td = &defpx->timeout.connect; |
| cap = PR_CAP_BE; |
| } else if (!strcmp(args[0], "check")) { |
| tv = &proxy->timeout.check; |
| td = &defpx->timeout.check; |
| cap = PR_CAP_BE; |
| } else if (!strcmp(args[0], "queue")) { |
| tv = &proxy->timeout.queue; |
| td = &defpx->timeout.queue; |
| cap = PR_CAP_BE; |
| } else if (!strcmp(args[0], "tunnel")) { |
| tv = &proxy->timeout.tunnel; |
| td = &defpx->timeout.tunnel; |
| cap = PR_CAP_BE; |
| } else if (!strcmp(args[0], "client-fin")) { |
| tv = &proxy->timeout.clientfin; |
| td = &defpx->timeout.clientfin; |
| cap = PR_CAP_FE; |
| } else if (!strcmp(args[0], "server-fin")) { |
| tv = &proxy->timeout.serverfin; |
| td = &defpx->timeout.serverfin; |
| cap = PR_CAP_BE; |
| } else { |
| memprintf(err, |
| "'timeout' supports 'client', 'server', 'connect', 'check', " |
| "'queue', 'http-keep-alive', 'http-request', 'tunnel', 'tarpit', " |
| "'client-fin' and 'server-fin' (got '%s')", |
| args[0]); |
| return -1; |
| } |
| |
| if (*args[1] == 0) { |
| memprintf(err, "'timeout %s' expects an integer value (in milliseconds)", name); |
| return -1; |
| } |
| |
| res = parse_time_err(args[1], &timeout, TIME_UNIT_MS); |
| if (res) { |
| memprintf(err, "unexpected character '%c' in 'timeout %s'", *res, name); |
| return -1; |
| } |
| |
| if (!(proxy->cap & cap)) { |
| memprintf(err, "'timeout %s' will be ignored because %s '%s' has no %s capability", |
| name, proxy_type_str(proxy), proxy->id, |
| (cap & PR_CAP_BE) ? "backend" : "frontend"); |
| retval = 1; |
| } |
| else if (defpx && *tv != *td) { |
| memprintf(err, "overwriting 'timeout %s' which was already specified", name); |
| retval = 1; |
| } |
| else if (warn) { |
| if (!already_warned(warn)) { |
| memprintf(err, "the '%s' directive is now deprecated in favor of 'timeout %s', and will not be supported in future versions.", |
| args[0], name); |
| retval = 1; |
| } |
| } |
| |
| if (*args[2] != 0) { |
| memprintf(err, "'timeout %s' : unexpected extra argument '%s' after value '%s'.", name, args[2], args[1]); |
| retval = -1; |
| } |
| |
| *tv = MS_TO_TICKS(timeout); |
| return retval; |
| } |
| |
| /* This function parses a "rate-limit" statement in a proxy section. It returns |
| * -1 if there is any error, 1 for a warning, otherwise zero. If it does not |
| * return zero, it will write an error or warning message into a preallocated |
| * buffer returned at <err>. The function must be called with <args> pointing |
| * to the first command line word, with <proxy> pointing to the proxy being |
| * parsed, and <defpx> to the default proxy or NULL. |
| */ |
| static int proxy_parse_rate_limit(char **args, int section, struct proxy *proxy, |
| struct proxy *defpx, const char *file, int line, |
| char **err) |
| { |
| int retval, cap; |
| char *res; |
| unsigned int *tv = NULL; |
| unsigned int *td = NULL; |
| unsigned int val; |
| |
| retval = 0; |
| |
| if (strcmp(args[1], "sessions") == 0) { |
| tv = &proxy->fe_sps_lim; |
| td = &defpx->fe_sps_lim; |
| cap = PR_CAP_FE; |
| } |
| else { |
| memprintf(err, "'%s' only supports 'sessions' (got '%s')", args[0], args[1]); |
| return -1; |
| } |
| |
| if (*args[2] == 0) { |
| memprintf(err, "'%s %s' expects expects an integer value (in sessions/second)", args[0], args[1]); |
| return -1; |
| } |
| |
| val = strtoul(args[2], &res, 0); |
| if (*res) { |
| memprintf(err, "'%s %s' : unexpected character '%c' in integer value '%s'", args[0], args[1], *res, args[2]); |
| return -1; |
| } |
| |
| if (!(proxy->cap & cap)) { |
| memprintf(err, "%s %s will be ignored because %s '%s' has no %s capability", |
| args[0], args[1], proxy_type_str(proxy), proxy->id, |
| (cap & PR_CAP_BE) ? "backend" : "frontend"); |
| retval = 1; |
| } |
| else if (defpx && *tv != *td) { |
| memprintf(err, "overwriting %s %s which was already specified", args[0], args[1]); |
| retval = 1; |
| } |
| |
| *tv = val; |
| return retval; |
| } |
| |
| /* This function parses a "max-keep-alive-queue" statement in a proxy section. |
| * It returns -1 if there is any error, 1 for a warning, otherwise zero. If it |
| * does not return zero, it will write an error or warning message into a |
| * preallocated buffer returned at <err>. The function must be called with |
| * <args> pointing to the first command line word, with <proxy> pointing to |
| * the proxy being parsed, and <defpx> to the default proxy or NULL. |
| */ |
| static int proxy_parse_max_ka_queue(char **args, int section, struct proxy *proxy, |
| struct proxy *defpx, const char *file, int line, |
| char **err) |
| { |
| int retval; |
| char *res; |
| unsigned int val; |
| |
| retval = 0; |
| |
| if (*args[1] == 0) { |
| memprintf(err, "'%s' expects expects an integer value (or -1 to disable)", args[0]); |
| return -1; |
| } |
| |
| val = strtol(args[1], &res, 0); |
| if (*res) { |
| memprintf(err, "'%s' : unexpected character '%c' in integer value '%s'", args[0], *res, args[1]); |
| return -1; |
| } |
| |
| if (!(proxy->cap & PR_CAP_BE)) { |
| memprintf(err, "%s will be ignored because %s '%s' has no backend capability", |
| args[0], proxy_type_str(proxy), proxy->id); |
| retval = 1; |
| } |
| |
| /* we store <val+1> so that a user-facing value of -1 is stored as zero (default) */ |
| proxy->max_ka_queue = val + 1; |
| return retval; |
| } |
| |
| /* This function parses a "declare" statement in a proxy section. It returns -1 |
| * if there is any error, 1 for warning, otherwise 0. If it does not return zero, |
| * it will write an error or warning message into a preallocated buffer returned |
| * at <err>. The function must be called with <args> pointing to the first command |
| * line word, with <proxy> pointing to the proxy being parsed, and <defpx> to the |
| * default proxy or NULL. |
| */ |
| static int proxy_parse_declare(char **args, int section, struct proxy *curpx, |
| struct proxy *defpx, const char *file, int line, |
| char **err) |
| { |
| /* Capture keyword wannot be declared in a default proxy. */ |
| if (curpx == defpx) { |
| memprintf(err, "'%s' not avalaible in default section", args[0]); |
| return -1; |
| } |
| |
| /* Capture keywork is only avalaible in frontend. */ |
| if (!(curpx->cap & PR_CAP_FE)) { |
| memprintf(err, "'%s' only avalaible in frontend or listen section", args[0]); |
| return -1; |
| } |
| |
| /* Check mandatory second keyword. */ |
| if (!args[1] || !*args[1]) { |
| memprintf(err, "'%s' needs a second keyword that specify the type of declaration ('capture')", args[0]); |
| return -1; |
| } |
| |
| /* Actually, declare is only avalaible for declaring capture |
| * slot, but in the future it can declare maps or variables. |
| * So, this section permits to check and switch acording with |
| * the second keyword. |
| */ |
| if (strcmp(args[1], "capture") == 0) { |
| char *error = NULL; |
| long len; |
| struct cap_hdr *hdr; |
| |
| /* Check the next keyword. */ |
| if (!args[2] || !*args[2] || |
| (strcmp(args[2], "response") != 0 && |
| strcmp(args[2], "request") != 0)) { |
| memprintf(err, "'%s %s' requires a direction ('request' or 'response')", args[0], args[1]); |
| return -1; |
| } |
| |
| /* Check the 'len' keyword. */ |
| if (!args[3] || !*args[3] || strcmp(args[3], "len") != 0) { |
| memprintf(err, "'%s %s' requires a capture length ('len')", args[0], args[1]); |
| return -1; |
| } |
| |
| /* Check the length value. */ |
| if (!args[4] || !*args[4]) { |
| memprintf(err, "'%s %s': 'len' requires a numeric value that represents the " |
| "capture length", |
| args[0], args[1]); |
| return -1; |
| } |
| |
| /* convert the length value. */ |
| len = strtol(args[4], &error, 10); |
| if (*error != '\0') { |
| memprintf(err, "'%s %s': cannot parse the length '%s'.", |
| args[0], args[1], args[3]); |
| return -1; |
| } |
| |
| /* check length. */ |
| if (len <= 0) { |
| memprintf(err, "length must be > 0"); |
| return -1; |
| } |
| |
| /* register the capture. */ |
| hdr = calloc(1, sizeof(*hdr)); |
| hdr->name = NULL; /* not a header capture */ |
| hdr->namelen = 0; |
| hdr->len = len; |
| hdr->pool = create_pool("caphdr", hdr->len + 1, MEM_F_SHARED); |
| |
| if (strcmp(args[2], "request") == 0) { |
| hdr->next = curpx->req_cap; |
| hdr->index = curpx->nb_req_cap++; |
| curpx->req_cap = hdr; |
| } |
| if (strcmp(args[2], "response") == 0) { |
| hdr->next = curpx->rsp_cap; |
| hdr->index = curpx->nb_rsp_cap++; |
| curpx->rsp_cap = hdr; |
| } |
| return 0; |
| } |
| else { |
| memprintf(err, "unknown declaration type '%s' (supports 'capture')", args[1]); |
| return -1; |
| } |
| } |
| |
| /* This function inserts proxy <px> into the tree of known proxies. The proxy's |
| * name is used as the storing key so it must already have been initialized. |
| */ |
| void proxy_store_name(struct proxy *px) |
| { |
| px->conf.by_name.key = px->id; |
| ebis_insert(&proxy_by_name, &px->conf.by_name); |
| } |
| |
| /* Returns a pointer to the first proxy matching capabilities <cap> and id |
| * <id>. NULL is returned if no match is found. If <table> is non-zero, it |
| * only considers proxies having a table. |
| */ |
| struct proxy *proxy_find_by_id(int id, int cap, int table) |
| { |
| struct eb32_node *n; |
| |
| for (n = eb32_lookup(&used_proxy_id, id); n; n = eb32_next(n)) { |
| struct proxy *px = container_of(n, struct proxy, conf.id); |
| |
| if (px->uuid != id) |
| break; |
| |
| if ((px->cap & cap) != cap) |
| continue; |
| |
| if (table && !px->table.size) |
| continue; |
| |
| return px; |
| } |
| return NULL; |
| } |
| |
| /* Returns a pointer to the first proxy matching either name <name>, or id |
| * <name> if <name> begins with a '#'. NULL is returned if no match is found. |
| * If <table> is non-zero, it only considers proxies having a table. |
| */ |
| struct proxy *proxy_find_by_name(const char *name, int cap, int table) |
| { |
| struct proxy *curproxy; |
| |
| if (*name == '#') { |
| curproxy = proxy_find_by_id(atoi(name + 1), cap, table); |
| if (curproxy) |
| return curproxy; |
| } |
| else { |
| struct ebpt_node *node; |
| |
| for (node = ebis_lookup(&proxy_by_name, name); node; node = ebpt_next(node)) { |
| curproxy = container_of(node, struct proxy, conf.by_name); |
| |
| if (strcmp(curproxy->id, name) != 0) |
| break; |
| |
| if ((curproxy->cap & cap) != cap) |
| continue; |
| |
| if (table && !curproxy->table.size) |
| continue; |
| |
| return curproxy; |
| } |
| } |
| return NULL; |
| } |
| |
| /* Finds the best match for a proxy with capabilities <cap>, name <name> and id |
| * <id>. At most one of <id> or <name> may be different provided that <cap> is |
| * valid. Either <id> or <name> may be left unspecified (0). The purpose is to |
| * find a proxy based on some information from a previous configuration, across |
| * reloads or during information exchange between peers. |
| * |
| * Names are looked up first if present, then IDs are compared if present. In |
| * case of an inexact match whatever is forced in the configuration has |
| * precedence in the following order : |
| * - 1) forced ID (proves a renaming / change of proxy type) |
| * - 2) proxy name+type (may indicate a move if ID differs) |
| * - 3) automatic ID+type (may indicate a renaming) |
| * |
| * Depending on what is found, we can end up in the following situations : |
| * |
| * name id cap | possible causes |
| * -------------+----------------- |
| * -- -- -- | nothing found |
| * -- -- ok | nothing found |
| * -- ok -- | proxy deleted, ID points to next one |
| * -- ok ok | proxy renamed, or deleted with ID pointing to next one |
| * ok -- -- | proxy deleted, but other half with same name still here (before) |
| * ok -- ok | proxy's ID changed (proxy moved in the config file) |
| * ok ok -- | proxy deleted, but other half with same name still here (after) |
| * ok ok ok | perfect match |
| * |
| * Upon return if <diff> is not NULL, it is zeroed then filled with up to 3 bits : |
| * - PR_FBM_MISMATCH_ID : proxy was found but ID differs |
| * (and ID was not zero) |
| * - PR_FBM_MISMATCH_NAME : proxy was found by ID but name differs |
| * (and name was not NULL) |
| * - PR_FBM_MISMATCH_PROXYTYPE : a proxy of different type was found with |
| * the same name and/or id |
| * |
| * Only a valid proxy is returned. If capabilities do not match, NULL is |
| * returned. The caller can check <diff> to report detailed warnings / errors, |
| * and decide whether or not to use what was found. |
| */ |
| struct proxy *proxy_find_best_match(int cap, const char *name, int id, int *diff) |
| { |
| struct proxy *byname; |
| struct proxy *byid; |
| |
| if (!name && !id) |
| return NULL; |
| |
| if (diff) |
| *diff = 0; |
| |
| byname = byid = NULL; |
| |
| if (name) { |
| byname = proxy_find_by_name(name, cap, 0); |
| if (byname && (!id || byname->uuid == id)) |
| return byname; |
| } |
| |
| /* remaining possiblities : |
| * - name not set |
| * - name set but not found |
| * - name found, but ID doesn't match. |
| */ |
| if (id) { |
| byid = proxy_find_by_id(id, cap, 0); |
| if (byid) { |
| if (byname) { |
| /* id+type found, name+type found, but not all 3. |
| * ID wins only if forced, otherwise name wins. |
| */ |
| if (byid->options & PR_O_FORCED_ID) { |
| if (diff) |
| *diff |= PR_FBM_MISMATCH_NAME; |
| return byid; |
| } |
| else { |
| if (diff) |
| *diff |= PR_FBM_MISMATCH_ID; |
| return byname; |
| } |
| } |
| |
| /* remaining possiblities : |
| * - name not set |
| * - name set but not found |
| */ |
| if (name && diff) |
| *diff |= PR_FBM_MISMATCH_NAME; |
| return byid; |
| } |
| |
| /* ID not found */ |
| if (byname) { |
| if (diff) |
| *diff |= PR_FBM_MISMATCH_ID; |
| return byname; |
| } |
| } |
| |
| /* All remaining possiblities will lead to NULL. If we can report more |
| * detailed information to the caller about changed types and/or name, |
| * we'll do it. For example, we could detect that "listen foo" was |
| * split into "frontend foo_ft" and "backend foo_bk" if IDs are forced. |
| * - name not set, ID not found |
| * - name not found, ID not set |
| * - name not found, ID not found |
| */ |
| if (!diff) |
| return NULL; |
| |
| if (name) { |
| byname = proxy_find_by_name(name, 0, 0); |
| if (byname && (!id || byname->uuid == id)) |
| *diff |= PR_FBM_MISMATCH_PROXYTYPE; |
| } |
| |
| if (id) { |
| byid = proxy_find_by_id(id, 0, 0); |
| if (byid) { |
| if (!name) |
| *diff |= PR_FBM_MISMATCH_PROXYTYPE; /* only type changed */ |
| else if (byid->options & PR_O_FORCED_ID) |
| *diff |= PR_FBM_MISMATCH_NAME | PR_FBM_MISMATCH_PROXYTYPE; /* name and type changed */ |
| /* otherwise it's a different proxy that was returned */ |
| } |
| } |
| return NULL; |
| } |
| |
| /* |
| * This function finds a server with matching name within selected proxy. |
| * It also checks if there are more matching servers with |
| * requested name as this often leads into unexpected situations. |
| */ |
| |
| struct server *findserver(const struct proxy *px, const char *name) { |
| |
| struct server *cursrv, *target = NULL; |
| |
| if (!px) |
| return NULL; |
| |
| for (cursrv = px->srv; cursrv; cursrv = cursrv->next) { |
| if (strcmp(cursrv->id, name)) |
| continue; |
| |
| if (!target) { |
| target = cursrv; |
| continue; |
| } |
| |
| Alert("Refusing to use duplicated server '%s' found in proxy: %s!\n", |
| name, px->id); |
| |
| return NULL; |
| } |
| |
| return target; |
| } |
| |
| /* This function checks that the designated proxy has no http directives |
| * enabled. It will output a warning if there are, and will fix some of them. |
| * It returns the number of fatal errors encountered. This should be called |
| * at the end of the configuration parsing if the proxy is not in http mode. |
| * The <file> argument is used to construct the error message. |
| */ |
| int proxy_cfg_ensure_no_http(struct proxy *curproxy) |
| { |
| if (curproxy->cookie_name != NULL) { |
| Warning("config : cookie will be ignored for %s '%s' (needs 'mode http').\n", |
| proxy_type_str(curproxy), curproxy->id); |
| } |
| if (curproxy->rsp_exp != NULL) { |
| Warning("config : server regular expressions will be ignored for %s '%s' (needs 'mode http').\n", |
| proxy_type_str(curproxy), curproxy->id); |
| } |
| if (curproxy->req_exp != NULL) { |
| Warning("config : client regular expressions will be ignored for %s '%s' (needs 'mode http').\n", |
| proxy_type_str(curproxy), curproxy->id); |
| } |
| if (curproxy->monitor_uri != NULL) { |
| Warning("config : monitor-uri will be ignored for %s '%s' (needs 'mode http').\n", |
| proxy_type_str(curproxy), curproxy->id); |
| } |
| if (curproxy->lbprm.algo & BE_LB_NEED_HTTP) { |
| curproxy->lbprm.algo &= ~BE_LB_ALGO; |
| curproxy->lbprm.algo |= BE_LB_ALGO_RR; |
| Warning("config : Layer 7 hash not possible for %s '%s' (needs 'mode http'). Falling back to round robin.\n", |
| proxy_type_str(curproxy), curproxy->id); |
| } |
| if (curproxy->to_log & (LW_REQ | LW_RESP)) { |
| curproxy->to_log &= ~(LW_REQ | LW_RESP); |
| Warning("parsing [%s:%d] : HTTP log/header format not usable with %s '%s' (needs 'mode http').\n", |
| curproxy->conf.lfs_file, curproxy->conf.lfs_line, |
| proxy_type_str(curproxy), curproxy->id); |
| } |
| if (curproxy->conf.logformat_string == default_http_log_format || |
| curproxy->conf.logformat_string == clf_http_log_format) { |
| /* Note: we don't change the directive's file:line number */ |
| curproxy->conf.logformat_string = default_tcp_log_format; |
| Warning("parsing [%s:%d] : 'option httplog' not usable with %s '%s' (needs 'mode http'). Falling back to 'option tcplog'.\n", |
| curproxy->conf.lfs_file, curproxy->conf.lfs_line, |
| proxy_type_str(curproxy), curproxy->id); |
| } |
| |
| return 0; |
| } |
| |
| /* Perform the most basic initialization of a proxy : |
| * memset(), list_init(*), reset_timeouts(*). |
| * Any new proxy or peer should be initialized via this function. |
| */ |
| void init_new_proxy(struct proxy *p) |
| { |
| memset(p, 0, sizeof(struct proxy)); |
| p->obj_type = OBJ_TYPE_PROXY; |
| LIST_INIT(&p->pendconns); |
| LIST_INIT(&p->acl); |
| LIST_INIT(&p->http_req_rules); |
| LIST_INIT(&p->http_res_rules); |
| LIST_INIT(&p->block_rules); |
| LIST_INIT(&p->redirect_rules); |
| LIST_INIT(&p->mon_fail_cond); |
| LIST_INIT(&p->switching_rules); |
| LIST_INIT(&p->server_rules); |
| LIST_INIT(&p->persist_rules); |
| LIST_INIT(&p->sticking_rules); |
| LIST_INIT(&p->storersp_rules); |
| LIST_INIT(&p->tcp_req.inspect_rules); |
| LIST_INIT(&p->tcp_rep.inspect_rules); |
| LIST_INIT(&p->tcp_req.l4_rules); |
| LIST_INIT(&p->tcp_req.l5_rules); |
| LIST_INIT(&p->req_add); |
| LIST_INIT(&p->rsp_add); |
| LIST_INIT(&p->listener_queue); |
| LIST_INIT(&p->logsrvs); |
| LIST_INIT(&p->logformat); |
| LIST_INIT(&p->logformat_sd); |
| LIST_INIT(&p->format_unique_id); |
| LIST_INIT(&p->conf.bind); |
| LIST_INIT(&p->conf.listeners); |
| LIST_INIT(&p->conf.args.list); |
| LIST_INIT(&p->tcpcheck_rules); |
| LIST_INIT(&p->filter_configs); |
| |
| /* Timeouts are defined as -1 */ |
| proxy_reset_timeouts(p); |
| p->tcp_rep.inspect_delay = TICK_ETERNITY; |
| |
| /* initial uuid is unassigned (-1) */ |
| p->uuid = -1; |
| } |
| |
| /* |
| * This function creates all proxy sockets. It should be done very early, |
| * typically before privileges are dropped. The sockets will be registered |
| * but not added to any fd_set, in order not to loose them across the fork(). |
| * The proxies also start in READY state because they all have their listeners |
| * bound. |
| * |
| * Its return value is composed from ERR_NONE, ERR_RETRYABLE and ERR_FATAL. |
| * Retryable errors will only be printed if <verbose> is not zero. |
| */ |
| int start_proxies(int verbose) |
| { |
| struct proxy *curproxy; |
| struct listener *listener; |
| int lerr, err = ERR_NONE; |
| int pxerr; |
| char msg[100]; |
| |
| for (curproxy = proxy; curproxy != NULL; curproxy = curproxy->next) { |
| if (curproxy->state != PR_STNEW) |
| continue; /* already initialized */ |
| |
| pxerr = 0; |
| list_for_each_entry(listener, &curproxy->conf.listeners, by_fe) { |
| if (listener->state != LI_ASSIGNED) |
| continue; /* already started */ |
| |
| lerr = listener->proto->bind(listener, msg, sizeof(msg)); |
| |
| /* errors are reported if <verbose> is set or if they are fatal */ |
| if (verbose || (lerr & (ERR_FATAL | ERR_ABORT))) { |
| if (lerr & ERR_ALERT) |
| Alert("Starting %s %s: %s\n", |
| proxy_type_str(curproxy), curproxy->id, msg); |
| else if (lerr & ERR_WARN) |
| Warning("Starting %s %s: %s\n", |
| proxy_type_str(curproxy), curproxy->id, msg); |
| } |
| |
| err |= lerr; |
| if (lerr & (ERR_ABORT | ERR_FATAL)) { |
| pxerr |= 1; |
| break; |
| } |
| else if (lerr & ERR_CODE) { |
| pxerr |= 1; |
| continue; |
| } |
| } |
| |
| if (!pxerr) { |
| curproxy->state = PR_STREADY; |
| send_log(curproxy, LOG_NOTICE, "Proxy %s started.\n", curproxy->id); |
| } |
| |
| if (err & ERR_ABORT) |
| break; |
| } |
| |
| return err; |
| } |
| |
| |
| /* |
| * This is the proxy management task. It enables proxies when there are enough |
| * free streams, or stops them when the table is full. It is designed to be |
| * called as a task which is woken up upon stopping or when rate limiting must |
| * be enforced. |
| */ |
| struct task *manage_proxy(struct task *t) |
| { |
| struct proxy *p = t->context; |
| int next = TICK_ETERNITY; |
| unsigned int wait; |
| |
| /* We should periodically try to enable listeners waiting for a |
| * global resource here. |
| */ |
| |
| /* first, let's check if we need to stop the proxy */ |
| if (unlikely(stopping && p->state != PR_STSTOPPED)) { |
| int t; |
| t = tick_remain(now_ms, p->stop_time); |
| if (t == 0) { |
| Warning("Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n", |
| p->id, p->fe_counters.cum_conn, p->be_counters.cum_conn); |
| send_log(p, LOG_WARNING, "Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n", |
| p->id, p->fe_counters.cum_conn, p->be_counters.cum_conn); |
| stop_proxy(p); |
| /* try to free more memory */ |
| pool_gc2(NULL); |
| } |
| else { |
| next = tick_first(next, p->stop_time); |
| } |
| } |
| |
| /* If the proxy holds a stick table, we need to purge all unused |
| * entries. These are all the ones in the table with ref_cnt == 0 |
| * and all the ones in the pool used to allocate new entries. Any |
| * entry attached to an existing stream waiting for a store will |
| * be in neither list. Any entry being dumped will have ref_cnt > 0. |
| * However we protect tables that are being synced to peers. |
| */ |
| if (unlikely(stopping && p->state == PR_STSTOPPED && p->table.current)) { |
| if (!p->table.syncing) { |
| stktable_trash_oldest(&p->table, p->table.current); |
| pool_gc2(NULL); |
| } |
| if (p->table.current) { |
| /* some entries still remain, let's recheck in one second */ |
| next = tick_first(next, tick_add(now_ms, 1000)); |
| } |
| } |
| |
| /* the rest below is just for frontends */ |
| if (!(p->cap & PR_CAP_FE)) |
| goto out; |
| |
| /* check the various reasons we may find to block the frontend */ |
| if (unlikely(p->feconn >= p->maxconn)) { |
| if (p->state == PR_STREADY) |
| p->state = PR_STFULL; |
| goto out; |
| } |
| |
| /* OK we have no reason to block, so let's unblock if we were blocking */ |
| if (p->state == PR_STFULL) |
| p->state = PR_STREADY; |
| |
| if (p->fe_sps_lim && |
| (wait = next_event_delay(&p->fe_sess_per_sec, p->fe_sps_lim, 0))) { |
| /* we're blocking because a limit was reached on the number of |
| * requests/s on the frontend. We want to re-check ASAP, which |
| * means in 1 ms before estimated expiration date, because the |
| * timer will have settled down. |
| */ |
| next = tick_first(next, tick_add(now_ms, wait)); |
| goto out; |
| } |
| |
| /* The proxy is not limited so we can re-enable any waiting listener */ |
| if (!LIST_ISEMPTY(&p->listener_queue)) |
| dequeue_all_listeners(&p->listener_queue); |
| out: |
| t->expire = next; |
| task_queue(t); |
| return t; |
| } |
| |
| |
| static int proxy_parse_hard_stop_after(char **args, int section_type, struct proxy *curpx, |
| struct proxy *defpx, const char *file, int line, |
| char **err) |
| { |
| const char *res; |
| |
| if (!*args[1]) { |
| memprintf(err, "'%s' expects <time> as argument.\n", args[0]); |
| return -1; |
| } |
| res = parse_time_err(args[1], &global.hard_stop_after, TIME_UNIT_MS); |
| if (res) { |
| memprintf(err, "unexpected character '%c' in argument to <%s>.\n", *res, args[0]); |
| return -1; |
| } |
| return 0; |
| } |
| |
| struct task *hard_stop(struct task *t) |
| { |
| struct proxy *p; |
| struct stream *s; |
| |
| if (killed) { |
| Warning("Some tasks resisted to hard-stop, exiting now.\n"); |
| send_log(NULL, LOG_WARNING, "Some tasks resisted to hard-stop, exiting now.\n"); |
| /* Do some cleanup and explicitely quit */ |
| deinit(); |
| exit(0); |
| } |
| |
| Warning("soft-stop running for too long, performing a hard-stop.\n"); |
| send_log(NULL, LOG_WARNING, "soft-stop running for too long, performing a hard-stop.\n"); |
| p = proxy; |
| while (p) { |
| if ((p->cap & PR_CAP_FE) && (p->feconn > 0)) { |
| Warning("Proxy %s hard-stopped (%d remaining conns will be closed).\n", |
| p->id, p->feconn); |
| send_log(p, LOG_WARNING, "Proxy %s hard-stopped (%d remaining conns will be closed).\n", |
| p->id, p->feconn); |
| } |
| p = p->next; |
| } |
| list_for_each_entry(s, &streams, list) { |
| stream_shutdown(s, SF_ERR_KILLED); |
| } |
| |
| killed = 1; |
| t->expire = tick_add(now_ms, MS_TO_TICKS(1000)); |
| return t; |
| } |
| |
| /* |
| * this function disables health-check servers so that the process will quickly be ignored |
| * by load balancers. Note that if a proxy was already in the PAUSED state, then its grace |
| * time will not be used since it would already not listen anymore to the socket. |
| */ |
| void soft_stop(void) |
| { |
| struct proxy *p; |
| struct peers *prs; |
| struct task *task; |
| |
| stopping = 1; |
| if (tick_isset(global.hard_stop_after)) { |
| task = task_new(); |
| if (task) { |
| task->process = hard_stop; |
| task_schedule(task, tick_add(now_ms, global.hard_stop_after)); |
| } |
| else { |
| Alert("out of memory trying to allocate the hard-stop task.\n"); |
| } |
| } |
| p = proxy; |
| tv_update_date(0,1); /* else, the old time before select will be used */ |
| while (p) { |
| /* Zombie proxy, let's close the file descriptors */ |
| if (p->state == PR_STSTOPPED && |
| !LIST_ISEMPTY(&p->conf.listeners) && |
| LIST_ELEM(p->conf.listeners.n, |
| struct listener *, by_fe)->state >= LI_ZOMBIE) { |
| struct listener *l; |
| list_for_each_entry(l, &p->conf.listeners, by_fe) { |
| if (l->state >= LI_ZOMBIE) |
| close(l->fd); |
| l->state = LI_INIT; |
| } |
| } |
| |
| if (p->state != PR_STSTOPPED) { |
| Warning("Stopping %s %s in %d ms.\n", proxy_cap_str(p->cap), p->id, p->grace); |
| send_log(p, LOG_WARNING, "Stopping %s %s in %d ms.\n", proxy_cap_str(p->cap), p->id, p->grace); |
| p->stop_time = tick_add(now_ms, p->grace); |
| |
| /* Note: do not wake up stopped proxies' task nor their tables' |
| * tasks as these ones might point to already released entries. |
| */ |
| if (p->table.size && p->table.sync_task) |
| task_wakeup(p->table.sync_task, TASK_WOKEN_MSG); |
| |
| if (p->task) |
| task_wakeup(p->task, TASK_WOKEN_MSG); |
| } |
| p = p->next; |
| } |
| |
| prs = cfg_peers; |
| while (prs) { |
| if (prs->peers_fe) |
| stop_proxy(prs->peers_fe); |
| prs = prs->next; |
| } |
| /* signal zero is used to broadcast the "stopping" event */ |
| signal_handler(0); |
| } |
| |
| |
| /* Temporarily disables listening on all of the proxy's listeners. Upon |
| * success, the proxy enters the PR_PAUSED state. If disabling at least one |
| * listener returns an error, then the proxy state is set to PR_STERROR |
| * because we don't know how to resume from this. The function returns 0 |
| * if it fails, or non-zero on success. |
| */ |
| int pause_proxy(struct proxy *p) |
| { |
| struct listener *l; |
| |
| if (!(p->cap & PR_CAP_FE) || p->state == PR_STERROR || |
| p->state == PR_STSTOPPED || p->state == PR_STPAUSED) |
| return 1; |
| |
| Warning("Pausing %s %s.\n", proxy_cap_str(p->cap), p->id); |
| send_log(p, LOG_WARNING, "Pausing %s %s.\n", proxy_cap_str(p->cap), p->id); |
| |
| list_for_each_entry(l, &p->conf.listeners, by_fe) { |
| if (!pause_listener(l)) |
| p->state = PR_STERROR; |
| } |
| |
| if (p->state == PR_STERROR) { |
| Warning("%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id); |
| send_log(p, LOG_WARNING, "%s %s failed to enter pause mode.\n", proxy_cap_str(p->cap), p->id); |
| return 0; |
| } |
| |
| p->state = PR_STPAUSED; |
| return 1; |
| } |
| |
| /* This function makes the proxy unusable, but keeps the listening sockets |
| * opened, so that if any process requests them, we are able to serve them. |
| * This should only be called early, before we started accepting requests. |
| */ |
| void zombify_proxy(struct proxy *p) |
| { |
| struct listener *l; |
| struct listener *first_to_listen = NULL; |
| |
| list_for_each_entry(l, &p->conf.listeners, by_fe) { |
| enum li_state oldstate = l->state; |
| |
| unbind_listener_no_close(l); |
| if (l->state >= LI_ASSIGNED) { |
| delete_listener(l); |
| } |
| /* |
| * Pretend we're still up and running so that the fd |
| * will be sent if asked. |
| */ |
| l->state = LI_ZOMBIE; |
| if (!first_to_listen && oldstate >= LI_LISTEN) |
| first_to_listen = l; |
| } |
| /* Quick hack : at stop time, to know we have to close the sockets |
| * despite the proxy being marked as stopped, make the first listener |
| * of the listener list an active one, so that we don't have to |
| * parse the whole list to be sure. |
| */ |
| if (first_to_listen && LIST_ELEM(p->conf.listeners.n, |
| struct listener *, by_fe) != first_to_listen) { |
| LIST_DEL(&l->by_fe); |
| LIST_ADD(&p->conf.listeners, &l->by_fe); |
| } |
| |
| p->state = PR_STSTOPPED; |
| } |
| |
| /* |
| * This function completely stops a proxy and releases its listeners. It has |
| * to be called when going down in order to release the ports so that another |
| * process may bind to them. It must also be called on disabled proxies at the |
| * end of start-up. When all listeners are closed, the proxy is set to the |
| * PR_STSTOPPED state. |
| */ |
| void stop_proxy(struct proxy *p) |
| { |
| struct listener *l; |
| |
| list_for_each_entry(l, &p->conf.listeners, by_fe) { |
| unbind_listener(l); |
| if (l->state >= LI_ASSIGNED) { |
| delete_listener(l); |
| } |
| } |
| p->state = PR_STSTOPPED; |
| } |
| |
| /* This function resumes listening on the specified proxy. It scans all of its |
| * listeners and tries to enable them all. If any of them fails, the proxy is |
| * put back to the paused state. It returns 1 upon success, or zero if an error |
| * is encountered. |
| */ |
| int resume_proxy(struct proxy *p) |
| { |
| struct listener *l; |
| int fail; |
| |
| if (p->state != PR_STPAUSED) |
| return 1; |
| |
| Warning("Enabling %s %s.\n", proxy_cap_str(p->cap), p->id); |
| send_log(p, LOG_WARNING, "Enabling %s %s.\n", proxy_cap_str(p->cap), p->id); |
| |
| fail = 0; |
| list_for_each_entry(l, &p->conf.listeners, by_fe) { |
| if (!resume_listener(l)) { |
| int port; |
| |
| port = get_host_port(&l->addr); |
| if (port) { |
| Warning("Port %d busy while trying to enable %s %s.\n", |
| port, proxy_cap_str(p->cap), p->id); |
| send_log(p, LOG_WARNING, "Port %d busy while trying to enable %s %s.\n", |
| port, proxy_cap_str(p->cap), p->id); |
| } |
| else { |
| Warning("Bind on socket %d busy while trying to enable %s %s.\n", |
| l->luid, proxy_cap_str(p->cap), p->id); |
| send_log(p, LOG_WARNING, "Bind on socket %d busy while trying to enable %s %s.\n", |
| l->luid, proxy_cap_str(p->cap), p->id); |
| } |
| |
| /* Another port might have been enabled. Let's stop everything. */ |
| fail = 1; |
| break; |
| } |
| } |
| |
| p->state = PR_STREADY; |
| if (fail) { |
| pause_proxy(p); |
| return 0; |
| } |
| return 1; |
| } |
| |
| /* |
| * This function temporarily disables listening so that another new instance |
| * can start listening. It is designed to be called upon reception of a |
| * SIGTTOU, after which either a SIGUSR1 can be sent to completely stop |
| * the proxy, or a SIGTTIN can be sent to listen again. |
| */ |
| void pause_proxies(void) |
| { |
| int err; |
| struct proxy *p; |
| struct peers *prs; |
| |
| err = 0; |
| p = proxy; |
| tv_update_date(0,1); /* else, the old time before select will be used */ |
| while (p) { |
| err |= !pause_proxy(p); |
| p = p->next; |
| } |
| |
| prs = cfg_peers; |
| while (prs) { |
| if (prs->peers_fe) |
| err |= !pause_proxy(prs->peers_fe); |
| prs = prs->next; |
| } |
| |
| if (err) { |
| Warning("Some proxies refused to pause, performing soft stop now.\n"); |
| send_log(p, LOG_WARNING, "Some proxies refused to pause, performing soft stop now.\n"); |
| soft_stop(); |
| } |
| } |
| |
| |
| /* |
| * This function reactivates listening. This can be used after a call to |
| * sig_pause(), for example when a new instance has failed starting up. |
| * It is designed to be called upon reception of a SIGTTIN. |
| */ |
| void resume_proxies(void) |
| { |
| int err; |
| struct proxy *p; |
| struct peers *prs; |
| |
| err = 0; |
| p = proxy; |
| tv_update_date(0,1); /* else, the old time before select will be used */ |
| while (p) { |
| err |= !resume_proxy(p); |
| p = p->next; |
| } |
| |
| prs = cfg_peers; |
| while (prs) { |
| if (prs->peers_fe) |
| err |= !resume_proxy(prs->peers_fe); |
| prs = prs->next; |
| } |
| |
| if (err) { |
| Warning("Some proxies refused to resume, a restart is probably needed to resume safe operations.\n"); |
| send_log(p, LOG_WARNING, "Some proxies refused to resume, a restart is probably needed to resume safe operations.\n"); |
| } |
| } |
| |
| /* Set current stream's backend to <be>. Nothing is done if the |
| * stream already had a backend assigned, which is indicated by |
| * s->flags & SF_BE_ASSIGNED. |
| * All flags, stats and counters which need be updated are updated. |
| * Returns 1 if done, 0 in case of internal error, eg: lack of resource. |
| */ |
| int stream_set_backend(struct stream *s, struct proxy *be) |
| { |
| if (s->flags & SF_BE_ASSIGNED) |
| return 1; |
| |
| if (flt_set_stream_backend(s, be) < 0) |
| return 0; |
| |
| s->be = be; |
| be->beconn++; |
| if (be->beconn > be->be_counters.conn_max) |
| be->be_counters.conn_max = be->beconn; |
| proxy_inc_be_ctr(be); |
| |
| /* assign new parameters to the stream from the new backend */ |
| s->si[1].flags &= ~SI_FL_INDEP_STR; |
| if (be->options2 & PR_O2_INDEPSTR) |
| s->si[1].flags |= SI_FL_INDEP_STR; |
| |
| if (tick_isset(be->timeout.serverfin)) |
| s->si[1].hcto = be->timeout.serverfin; |
| |
| /* We want to enable the backend-specific analysers except those which |
| * were already run as part of the frontend/listener. Note that it would |
| * be more reliable to store the list of analysers that have been run, |
| * but what we do here is OK for now. |
| */ |
| s->req.analysers |= be->be_req_ana & ~(strm_li(s) ? strm_li(s)->analysers : 0); |
| |
| /* If the target backend requires HTTP processing, we have to allocate |
| * the HTTP transaction and hdr_idx if we did not have one. |
| */ |
| if (unlikely(!s->txn && be->http_needed)) { |
| if (unlikely(!http_alloc_txn(s))) |
| return 0; /* not enough memory */ |
| |
| /* and now initialize the HTTP transaction state */ |
| http_init_txn(s); |
| } |
| |
| /* Be sure to filter request headers if the backend is an HTTP proxy and |
| * if there are filters attached to the stream. */ |
| if (s->be->mode == PR_MODE_HTTP && HAS_FILTERS(s)) |
| s->req.analysers |= AN_REQ_FLT_HTTP_HDRS; |
| |
| if (s->txn) { |
| if (be->options2 & PR_O2_RSPBUG_OK) |
| s->txn->rsp.err_pos = -1; /* let buggy responses pass */ |
| |
| /* If we chain to an HTTP backend running a different HTTP mode, we |
| * have to re-adjust the desired keep-alive/close mode to accommodate |
| * both the frontend's and the backend's modes. |
| */ |
| if (strm_fe(s)->mode == PR_MODE_HTTP && be->mode == PR_MODE_HTTP && |
| ((strm_fe(s)->options & PR_O_HTTP_MODE) != (be->options & PR_O_HTTP_MODE))) |
| http_adjust_conn_mode(s, s->txn, &s->txn->req); |
| |
| /* If an LB algorithm needs to access some pre-parsed body contents, |
| * we must not start to forward anything until the connection is |
| * confirmed otherwise we'll lose the pointer to these data and |
| * prevent the hash from being doable again after a redispatch. |
| */ |
| if (be->mode == PR_MODE_HTTP && |
| (be->lbprm.algo & (BE_LB_KIND | BE_LB_PARM)) == (BE_LB_KIND_HI | BE_LB_HASH_PRM)) |
| s->txn->req.flags |= HTTP_MSGF_WAIT_CONN; |
| |
| /* we may request to parse a request body */ |
| if ((be->options & PR_O_WREQ_BODY) && |
| (s->txn->req.body_len || (s->txn->req.flags & HTTP_MSGF_TE_CHNK))) |
| s->req.analysers |= AN_REQ_HTTP_BODY; |
| } |
| |
| s->flags |= SF_BE_ASSIGNED; |
| if (be->options2 & PR_O2_NODELAY) { |
| s->req.flags |= CF_NEVER_WAIT; |
| s->res.flags |= CF_NEVER_WAIT; |
| } |
| |
| return 1; |
| } |
| |
| static struct cfg_kw_list cfg_kws = {ILH, { |
| { CFG_GLOBAL, "hard-stop-after", proxy_parse_hard_stop_after }, |
| { CFG_LISTEN, "timeout", proxy_parse_timeout }, |
| { CFG_LISTEN, "clitimeout", proxy_parse_timeout }, |
| { CFG_LISTEN, "contimeout", proxy_parse_timeout }, |
| { CFG_LISTEN, "srvtimeout", proxy_parse_timeout }, |
| { CFG_LISTEN, "rate-limit", proxy_parse_rate_limit }, |
| { CFG_LISTEN, "max-keep-alive-queue", proxy_parse_max_ka_queue }, |
| { CFG_LISTEN, "declare", proxy_parse_declare }, |
| { 0, NULL, NULL }, |
| }}; |
| |
| /* Expects to find a frontend named <arg> and returns it, otherwise displays various |
| * adequate error messages and returns NULL. This function is designed to be used by |
| * functions requiring a frontend on the CLI. |
| */ |
| struct proxy *cli_find_frontend(struct appctx *appctx, const char *arg) |
| { |
| struct proxy *px; |
| |
| if (!*arg) { |
| appctx->ctx.cli.severity = LOG_ERR; |
| appctx->ctx.cli.msg = "A frontend name is expected.\n"; |
| appctx->st0 = CLI_ST_PRINT; |
| return NULL; |
| } |
| |
| px = proxy_fe_by_name(arg); |
| if (!px) { |
| appctx->ctx.cli.severity = LOG_ERR; |
| appctx->ctx.cli.msg = "No such frontend.\n"; |
| appctx->st0 = CLI_ST_PRINT; |
| return NULL; |
| } |
| return px; |
| } |
| |
| /* Expects to find a backend named <arg> and returns it, otherwise displays various |
| * adequate error messages and returns NULL. This function is designed to be used by |
| * functions requiring a frontend on the CLI. |
| */ |
| struct proxy *cli_find_backend(struct appctx *appctx, const char *arg) |
| { |
| struct proxy *px; |
| |
| if (!*arg) { |
| appctx->ctx.cli.severity = LOG_ERR; |
| appctx->ctx.cli.msg = "A backend name is expected.\n"; |
| appctx->st0 = CLI_ST_PRINT; |
| return NULL; |
| } |
| |
| px = proxy_be_by_name(arg); |
| if (!px) { |
| appctx->ctx.cli.severity = LOG_ERR; |
| appctx->ctx.cli.msg = "No such backend.\n"; |
| appctx->st0 = CLI_ST_PRINT; |
| return NULL; |
| } |
| return px; |
| } |
| |
| |
| /* parse a "show servers" CLI line, returns 0 if it wants to start the dump or |
| * 1 if it stops immediately. If an argument is specified, it will set the proxy |
| * pointer into cli.p0 and its ID into cli.i0. |
| */ |
| static int cli_parse_show_servers(char **args, struct appctx *appctx, void *private) |
| { |
| struct proxy *px; |
| |
| /* check if a backend name has been provided */ |
| if (*args[3]) { |
| /* read server state from local file */ |
| px = proxy_be_by_name(args[3]); |
| |
| if (!px) { |
| appctx->ctx.cli.severity = LOG_ERR; |
| appctx->ctx.cli.msg = "Can't find backend.\n"; |
| appctx->st0 = CLI_ST_PRINT; |
| return 1; |
| } |
| appctx->ctx.cli.p0 = px; |
| appctx->ctx.cli.i0 = px->uuid; |
| } |
| return 0; |
| } |
| |
| /* dumps server state information into <buf> for all the servers found in backend cli.p0. |
| * These information are all the parameters which may change during HAProxy runtime. |
| * By default, we only export to the last known server state file format. |
| * These information can be used at next startup to recover same level of server state. |
| * It uses the proxy pointer from cli.p0, the proxy's id from cli.i0 and the server's |
| * pointer from cli.p1. |
| */ |
| static int dump_servers_state(struct stream_interface *si, struct chunk *buf) |
| { |
| struct appctx *appctx = __objt_appctx(si->end); |
| struct proxy *px = appctx->ctx.cli.p0; |
| struct server *srv; |
| char srv_addr[INET6_ADDRSTRLEN + 1]; |
| time_t srv_time_since_last_change; |
| int bk_f_forced_id, srv_f_forced_id; |
| |
| /* we don't want to report any state if the backend is not enabled on this process */ |
| if (px->bind_proc && !(px->bind_proc & (1UL << (relative_pid - 1)))) |
| return 1; |
| |
| if (!appctx->ctx.cli.p1) |
| appctx->ctx.cli.p1 = px->srv; |
| |
| for (; appctx->ctx.cli.p1 != NULL; appctx->ctx.cli.p1 = srv->next) { |
| srv = appctx->ctx.cli.p1; |
| srv_addr[0] = '\0'; |
| |
| switch (srv->addr.ss_family) { |
| case AF_INET: |
| inet_ntop(srv->addr.ss_family, &((struct sockaddr_in *)&srv->addr)->sin_addr, |
| srv_addr, INET_ADDRSTRLEN + 1); |
| break; |
| case AF_INET6: |
| inet_ntop(srv->addr.ss_family, &((struct sockaddr_in6 *)&srv->addr)->sin6_addr, |
| srv_addr, INET6_ADDRSTRLEN + 1); |
| break; |
| } |
| srv_time_since_last_change = now.tv_sec - srv->last_change; |
| bk_f_forced_id = px->options & PR_O_FORCED_ID ? 1 : 0; |
| srv_f_forced_id = srv->flags & SRV_F_FORCED_ID ? 1 : 0; |
| |
| chunk_appendf(buf, |
| "%d %s " |
| "%d %s %s " |
| "%d %d %d %d %ld " |
| "%d %d %d %d %d " |
| "%d %d %s %u" |
| "\n", |
| px->uuid, px->id, |
| srv->puid, srv->id, srv_addr, |
| srv->cur_state, srv->cur_admin, srv->uweight, srv->iweight, (long int)srv_time_since_last_change, |
| srv->check.status, srv->check.result, srv->check.health, srv->check.state, srv->agent.state, |
| bk_f_forced_id, srv_f_forced_id, srv->hostname ? srv->hostname : "-", srv->svc_port); |
| if (ci_putchk(si_ic(si), &trash) == -1) { |
| si_applet_cant_put(si); |
| return 0; |
| } |
| } |
| return 1; |
| } |
| |
| /* Parses backend list or simply use backend name provided by the user to return |
| * states of servers to stdout. It dumps proxy <cli.p0> and stops if <cli.i0> is |
| * non-null. |
| */ |
| static int cli_io_handler_servers_state(struct appctx *appctx) |
| { |
| struct stream_interface *si = appctx->owner; |
| extern struct proxy *proxy; |
| struct proxy *curproxy; |
| |
| chunk_reset(&trash); |
| |
| if (appctx->st2 == STAT_ST_INIT) { |
| if (!appctx->ctx.cli.p0) |
| appctx->ctx.cli.p0 = proxy; |
| appctx->st2 = STAT_ST_HEAD; |
| } |
| |
| if (appctx->st2 == STAT_ST_HEAD) { |
| chunk_printf(&trash, "%d\n# %s\n", SRV_STATE_FILE_VERSION, SRV_STATE_FILE_FIELD_NAMES); |
| if (ci_putchk(si_ic(si), &trash) == -1) { |
| si_applet_cant_put(si); |
| return 0; |
| } |
| appctx->st2 = STAT_ST_INFO; |
| } |
| |
| /* STAT_ST_INFO */ |
| for (; appctx->ctx.cli.p0 != NULL; appctx->ctx.cli.p0 = curproxy->next) { |
| curproxy = appctx->ctx.cli.p0; |
| /* servers are only in backends */ |
| if (curproxy->cap & PR_CAP_BE) { |
| if (!dump_servers_state(si, &trash)) |
| return 0; |
| } |
| /* only the selected proxy is dumped */ |
| if (appctx->ctx.cli.i0) |
| break; |
| } |
| |
| return 1; |
| } |
| |
| /* Parses backend list and simply report backend names. It keeps the proxy |
| * pointer in cli.p0. |
| */ |
| static int cli_io_handler_show_backend(struct appctx *appctx) |
| { |
| extern struct proxy *proxy; |
| struct stream_interface *si = appctx->owner; |
| struct proxy *curproxy; |
| |
| chunk_reset(&trash); |
| |
| if (!appctx->ctx.cli.p0) { |
| chunk_printf(&trash, "# name\n"); |
| if (ci_putchk(si_ic(si), &trash) == -1) { |
| si_applet_cant_put(si); |
| return 0; |
| } |
| appctx->ctx.cli.p0 = proxy; |
| } |
| |
| for (; appctx->ctx.cli.p0 != NULL; appctx->ctx.cli.p0 = curproxy->next) { |
| curproxy = appctx->ctx.cli.p0; |
| |
| /* looking for backends only */ |
| if (!(curproxy->cap & PR_CAP_BE)) |
| continue; |
| |
| /* we don't want to list a backend which is bound to this process */ |
| if (curproxy->bind_proc && !(curproxy->bind_proc & (1UL << (relative_pid - 1)))) |
| continue; |
| |
| chunk_appendf(&trash, "%s\n", curproxy->id); |
| if (ci_putchk(si_ic(si), &trash) == -1) { |
| si_applet_cant_put(si); |
| return 0; |
| } |
| } |
| |
| return 1; |
| } |
| |
| /* Parses the "enable dynamic-cookies backend" directive, it always returns 1 */ |
| static int cli_parse_enable_dyncookie_backend(char **args, struct appctx *appctx, void *private) |
| { |
| struct proxy *px; |
| struct server *s; |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| px = cli_find_backend(appctx, args[3]); |
| if (!px) |
| return 1; |
| |
| px->ck_opts |= PR_CK_DYNAMIC; |
| |
| for (s = px->srv; s != NULL; s = s->next) |
| srv_set_dyncookie(s); |
| |
| return 1; |
| } |
| |
| /* Parses the "disable dynamic-cookies backend" directive, it always returns 1 */ |
| static int cli_parse_disable_dyncookie_backend(char **args, struct appctx *appctx, void *private) |
| { |
| struct proxy *px; |
| struct server *s; |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| px = cli_find_backend(appctx, args[3]); |
| if (!px) |
| return 1; |
| |
| px->ck_opts &= ~PR_CK_DYNAMIC; |
| |
| for (s = px->srv; s != NULL; s = s->next) { |
| if (!(s->flags & SRV_F_COOKIESET)) { |
| free(s->cookie); |
| s->cookie = NULL; |
| } |
| } |
| |
| return 1; |
| } |
| |
| /* Parses the "set dynamic-cookie-key backend" directive, it always returns 1 */ |
| static int cli_parse_set_dyncookie_key_backend(char **args, struct appctx *appctx, void *private) |
| { |
| struct proxy *px; |
| struct server *s; |
| char *newkey; |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| px = cli_find_backend(appctx, args[3]); |
| if (!px) |
| return 1; |
| |
| if (!*args[4]) { |
| appctx->ctx.cli.severity = LOG_ERR; |
| appctx->ctx.cli.msg = "String value expected.\n"; |
| appctx->st0 = CLI_ST_PRINT; |
| return 1; |
| } |
| |
| newkey = strdup(args[4]); |
| if (!newkey) { |
| appctx->ctx.cli.severity = LOG_ERR; |
| appctx->ctx.cli.msg = "Failed to allocate memory.\n"; |
| appctx->st0 = CLI_ST_PRINT; |
| return 1; |
| } |
| free(px->dyncookie_key); |
| px->dyncookie_key = newkey; |
| |
| for (s = px->srv; s != NULL; s = s->next) |
| srv_set_dyncookie(s); |
| |
| return 1; |
| } |
| |
| /* Parses the "set maxconn frontend" directive, it always returns 1 */ |
| static int cli_parse_set_maxconn_frontend(char **args, struct appctx *appctx, void *private) |
| { |
| struct proxy *px; |
| struct listener *l; |
| int v; |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| px = cli_find_frontend(appctx, args[3]); |
| if (!px) |
| return 1; |
| |
| if (!*args[4]) { |
| appctx->ctx.cli.severity = LOG_ERR; |
| appctx->ctx.cli.msg = "Integer value expected.\n"; |
| appctx->st0 = CLI_ST_PRINT; |
| return 1; |
| } |
| |
| v = atoi(args[4]); |
| if (v < 0) { |
| appctx->ctx.cli.severity = LOG_ERR; |
| appctx->ctx.cli.msg = "Value out of range.\n"; |
| appctx->st0 = CLI_ST_PRINT; |
| return 1; |
| } |
| |
| /* OK, the value is fine, so we assign it to the proxy and to all of |
| * its listeners. The blocked ones will be dequeued. |
| */ |
| px->maxconn = v; |
| list_for_each_entry(l, &px->conf.listeners, by_fe) { |
| l->maxconn = v; |
| if (l->state == LI_FULL) |
| resume_listener(l); |
| } |
| |
| if (px->maxconn > px->feconn && !LIST_ISEMPTY(&px->listener_queue)) |
| dequeue_all_listeners(&px->listener_queue); |
| |
| return 1; |
| } |
| |
| /* Parses the "shutdown frontend" directive, it always returns 1 */ |
| static int cli_parse_shutdown_frontend(char **args, struct appctx *appctx, void *private) |
| { |
| struct proxy *px; |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| px = cli_find_frontend(appctx, args[2]); |
| if (!px) |
| return 1; |
| |
| if (px->state == PR_STSTOPPED) { |
| appctx->ctx.cli.severity = LOG_NOTICE; |
| appctx->ctx.cli.msg = "Frontend was already shut down.\n"; |
| appctx->st0 = CLI_ST_PRINT; |
| return 1; |
| } |
| |
| Warning("Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n", |
| px->id, px->fe_counters.cum_conn, px->be_counters.cum_conn); |
| send_log(px, LOG_WARNING, "Proxy %s stopped (FE: %lld conns, BE: %lld conns).\n", |
| px->id, px->fe_counters.cum_conn, px->be_counters.cum_conn); |
| stop_proxy(px); |
| return 1; |
| } |
| |
| /* Parses the "disable frontend" directive, it always returns 1 */ |
| static int cli_parse_disable_frontend(char **args, struct appctx *appctx, void *private) |
| { |
| struct proxy *px; |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| px = cli_find_frontend(appctx, args[2]); |
| if (!px) |
| return 1; |
| |
| if (px->state == PR_STSTOPPED) { |
| appctx->ctx.cli.severity = LOG_NOTICE; |
| appctx->ctx.cli.msg = "Frontend was previously shut down, cannot disable.\n"; |
| appctx->st0 = CLI_ST_PRINT; |
| return 1; |
| } |
| |
| if (px->state == PR_STPAUSED) { |
| appctx->ctx.cli.severity = LOG_NOTICE; |
| appctx->ctx.cli.msg = "Frontend is already disabled.\n"; |
| appctx->st0 = CLI_ST_PRINT; |
| return 1; |
| } |
| |
| if (!pause_proxy(px)) { |
| appctx->ctx.cli.severity = LOG_ERR; |
| appctx->ctx.cli.msg = "Failed to pause frontend, check logs for precise cause.\n"; |
| appctx->st0 = CLI_ST_PRINT; |
| return 1; |
| } |
| return 1; |
| } |
| |
| /* Parses the "enable frontend" directive, it always returns 1 */ |
| static int cli_parse_enable_frontend(char **args, struct appctx *appctx, void *private) |
| { |
| struct proxy *px; |
| |
| if (!cli_has_level(appctx, ACCESS_LVL_ADMIN)) |
| return 1; |
| |
| px = cli_find_frontend(appctx, args[2]); |
| if (!px) |
| return 1; |
| |
| if (px->state == PR_STSTOPPED) { |
| appctx->ctx.cli.severity = LOG_ERR; |
| appctx->ctx.cli.msg = "Frontend was previously shut down, cannot enable.\n"; |
| appctx->st0 = CLI_ST_PRINT; |
| return 1; |
| } |
| |
| if (px->state != PR_STPAUSED) { |
| appctx->ctx.cli.severity = LOG_NOTICE; |
| appctx->ctx.cli.msg = "Frontend is already enabled.\n"; |
| appctx->st0 = CLI_ST_PRINT; |
| return 1; |
| } |
| |
| if (!resume_proxy(px)) { |
| appctx->ctx.cli.severity = LOG_ERR; |
| appctx->ctx.cli.msg = "Failed to resume frontend, check logs for precise cause (port conflict?).\n"; |
| appctx->st0 = CLI_ST_PRINT; |
| return 1; |
| } |
| return 1; |
| } |
| |
| /* register cli keywords */ |
| static struct cli_kw_list cli_kws = {{ },{ |
| { { "disable", "frontend", NULL }, "disable frontend : temporarily disable specific frontend", cli_parse_disable_frontend, NULL, NULL }, |
| { { "enable", "frontend", NULL }, "enable frontend : re-enable specific frontend", cli_parse_enable_frontend, NULL, NULL }, |
| { { "set", "maxconn", "frontend", NULL }, "set maxconn frontend : change a frontend's maxconn setting", cli_parse_set_maxconn_frontend, NULL }, |
| { { "show","servers", "state", NULL }, "show servers state [id]: dump volatile server information (for backend <id>)", cli_parse_show_servers, cli_io_handler_servers_state }, |
| { { "show", "backend", NULL }, "show backend : list backends in the current running config", NULL, cli_io_handler_show_backend }, |
| { { "shutdown", "frontend", NULL }, "shutdown frontend : stop a specific frontend", cli_parse_shutdown_frontend, NULL, NULL }, |
| { { "set", "dynamic-cookie-key", "backend", NULL }, "set dynamic-cookie-key backend : change a backend secret key for dynamic cookies", cli_parse_set_dyncookie_key_backend, NULL }, |
| { { "enable", "dynamic-cookie", "backend", NULL }, "enable dynamic-cookie backend : enable dynamic cookies on a specific backend", cli_parse_enable_dyncookie_backend, NULL }, |
| { { "disable", "dynamic-cookie", "backend", NULL }, "disable dynamic-cookie backend : disable dynamic cookies on a specific backend", cli_parse_disable_dyncookie_backend, NULL }, |
| {{},} |
| }}; |
| |
| __attribute__((constructor)) |
| static void __proxy_module_init(void) |
| { |
| cfg_register_keywords(&cfg_kws); |
| cli_register_kw(&cli_kws); |
| } |
| |
| /* |
| * Local variables: |
| * c-indent-level: 8 |
| * c-basic-offset: 8 |
| * End: |
| */ |