| /* Licensed to the Apache Software Foundation (ASF) under one or more | |
| * contributor license agreements. See the NOTICE file distributed with | |
| * this work for additional information regarding copyright ownership. | |
| * The ASF licenses this file to You under the Apache License, Version 2.0 | |
| * (the "License"); you may not use this file except in compliance with | |
| * the License. You may obtain a copy of the License at | |
| * | |
| * http://www.apache.org/licenses/LICENSE-2.0 | |
| * | |
| * Unless required by applicable law or agreed to in writing, software | |
| * distributed under the License is distributed on an "AS IS" BASIS, | |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| * See the License for the specific language governing permissions and | |
| * limitations under the License. | |
| */ | |
| /* Load balancer module for Apache proxy */ | |
| #include "mod_proxy.h" | |
| #include "proxy_util.h" | |
| #include "scoreboard.h" | |
| #include "ap_mpm.h" | |
| #include "apr_version.h" | |
| #include "ap_hooks.h" | |
| #include "apr_date.h" | |
| #include "apr_escape.h" | |
| #include "mod_watchdog.h" | |
| static const char *balancer_mutex_type = "proxy-balancer-shm"; | |
| ap_slotmem_provider_t *storage = NULL; | |
| module AP_MODULE_DECLARE_DATA proxy_balancer_module; | |
| static APR_OPTIONAL_FN_TYPE(set_worker_hc_param) *set_worker_hc_param_f = NULL; | |
| static int (*ap_proxy_retry_worker_fn)(const char *proxy_function, | |
| proxy_worker *worker, server_rec *s) = NULL; | |
| static APR_OPTIONAL_FN_TYPE(hc_show_exprs) *hc_show_exprs_f = NULL; | |
| static APR_OPTIONAL_FN_TYPE(hc_select_exprs) *hc_select_exprs_f = NULL; | |
| static APR_OPTIONAL_FN_TYPE(hc_valid_expr) *hc_valid_expr_f = NULL; | |
| /* | |
| * Register our mutex type before the config is read so we | |
| * can adjust the mutex settings using the Mutex directive. | |
| */ | |
| static int balancer_pre_config(apr_pool_t *pconf, apr_pool_t *plog, | |
| apr_pool_t *ptemp) | |
| { | |
| apr_status_t rv; | |
| rv = ap_mutex_register(pconf, balancer_mutex_type, NULL, | |
| APR_LOCK_DEFAULT, 0); | |
| if (rv != APR_SUCCESS) { | |
| return rv; | |
| } | |
| set_worker_hc_param_f = APR_RETRIEVE_OPTIONAL_FN(set_worker_hc_param); | |
| hc_show_exprs_f = APR_RETRIEVE_OPTIONAL_FN(hc_show_exprs); | |
| hc_select_exprs_f = APR_RETRIEVE_OPTIONAL_FN(hc_select_exprs); | |
| hc_valid_expr_f = APR_RETRIEVE_OPTIONAL_FN(hc_valid_expr); | |
| return OK; | |
| } | |
| #if 0 | |
| extern void proxy_update_members(proxy_balancer **balancer, request_rec *r, | |
| proxy_server_conf *conf); | |
| #endif | |
| static int proxy_balancer_canon(request_rec *r, char *url) | |
| { | |
| char *host; | |
| apr_port_t port = 0; | |
| const char *err; | |
| /* TODO: offset of BALANCER_PREFIX ?? */ | |
| if (ap_cstr_casecmpn(url, "balancer:", 9) == 0) { | |
| ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, "canonicalising URL %s", url); | |
| url += 9; | |
| } | |
| else { | |
| return DECLINED; | |
| } | |
| /* do syntatic check. | |
| * We break the URL into host, port, path | |
| */ | |
| err = ap_proxy_canon_netloc(r->pool, &url, NULL, NULL, &host, &port); | |
| if (err) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01157) | |
| "error parsing URL %s: %s", | |
| url, err); | |
| return HTTP_BAD_REQUEST; | |
| } | |
| /* The canon_handler hooks are run per the BalancerMember in | |
| * balancer_fixup(), keep the original/raw path for now. | |
| */ | |
| r->filename = apr_pstrcat(r->pool, "proxy:" BALANCER_PREFIX, | |
| host, "/", url, NULL); | |
| return OK; | |
| } | |
| static void init_balancer_members(proxy_balancer *balancer, | |
| server_rec *s, apr_pool_t *p) | |
| { | |
| int i; | |
| proxy_worker **workers = (proxy_worker **)balancer->workers->elts; | |
| for (i = 0; i < balancer->workers->nelts; i++) { | |
| int worker_is_initialized; | |
| proxy_worker *worker = *workers; | |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(01158) | |
| "Looking at %s -> %s initialized?", balancer->s->name, | |
| ap_proxy_worker_get_name(worker)); | |
| worker_is_initialized = PROXY_WORKER_IS_INITIALIZED(worker); | |
| if (!worker_is_initialized) { | |
| ap_proxy_initialize_worker(worker, s, p); | |
| } | |
| ++workers; | |
| } | |
| /* Set default number of attempts to the number of | |
| * workers. | |
| */ | |
| if (!balancer->s->max_attempts_set && balancer->workers->nelts > 1) { | |
| balancer->s->max_attempts = balancer->workers->nelts - 1; | |
| balancer->s->max_attempts_set = 1; | |
| } | |
| } | |
| /* Retrieve the parameter with the given name | |
| * Something like 'JSESSIONID=12345...N' | |
| */ | |
| static char *get_path_param(apr_pool_t *pool, char *url, | |
| const char *name, int scolon_sep) | |
| { | |
| char *path = NULL; | |
| char *pathdelims = "?&"; | |
| if (scolon_sep) { | |
| pathdelims = ";?&"; | |
| } | |
| for (path = strstr(url, name); path; path = strstr(path + 1, name)) { | |
| path += strlen(name); | |
| if (*path == '=') { | |
| /* | |
| * Session path was found, get its value | |
| */ | |
| ++path; | |
| if (*path) { | |
| char *q; | |
| path = apr_strtok(apr_pstrdup(pool, path), pathdelims, &q); | |
| return path; | |
| } | |
| } | |
| } | |
| return NULL; | |
| } | |
| static char *get_cookie_param(request_rec *r, const char *name) | |
| { | |
| const char *cookies; | |
| const char *start_cookie; | |
| if ((cookies = apr_table_get(r->headers_in, "Cookie"))) { | |
| for (start_cookie = ap_strstr_c(cookies, name); start_cookie; | |
| start_cookie = ap_strstr_c(start_cookie + 1, name)) { | |
| if (start_cookie == cookies || | |
| start_cookie[-1] == ';' || | |
| start_cookie[-1] == ',' || | |
| apr_isspace(start_cookie[-1])) { | |
| start_cookie += strlen(name); | |
| while(*start_cookie && apr_isspace(*start_cookie)) | |
| ++start_cookie; | |
| if (*start_cookie++ == '=' && *start_cookie) { | |
| /* | |
| * Session cookie was found, get its value | |
| */ | |
| char *end_cookie, *cookie; | |
| cookie = apr_pstrdup(r->pool, start_cookie); | |
| if ((end_cookie = strchr(cookie, ';')) != NULL) | |
| *end_cookie = '\0'; | |
| if((end_cookie = strchr(cookie, ',')) != NULL) | |
| *end_cookie = '\0'; | |
| return cookie; | |
| } | |
| } | |
| } | |
| } | |
| return NULL; | |
| } | |
| /* Find the worker that has the 'route' defined | |
| */ | |
| static proxy_worker *find_route_worker(proxy_balancer *balancer, | |
| const char *route, request_rec *r, | |
| int recursion) | |
| { | |
| int i; | |
| int checking_standby; | |
| int checked_standby; | |
| proxy_worker **workers; | |
| checking_standby = checked_standby = 0; | |
| while (!checked_standby) { | |
| workers = (proxy_worker **)balancer->workers->elts; | |
| for (i = 0; i < balancer->workers->nelts; i++, workers++) { | |
| proxy_worker *worker = *workers; | |
| if ( (checking_standby ? !PROXY_WORKER_IS_STANDBY(worker) : PROXY_WORKER_IS_STANDBY(worker)) ) | |
| continue; | |
| if (*(worker->s->route) && strcmp(worker->s->route, route) == 0) { | |
| if (PROXY_WORKER_IS_USABLE(worker)) { | |
| return worker; | |
| } else { | |
| /* | |
| * If the worker is in error state run | |
| * retry on that worker. It will be marked as | |
| * operational if the retry timeout is elapsed. | |
| * The worker might still be unusable, but we try | |
| * anyway. | |
| */ | |
| ap_proxy_retry_worker_fn("BALANCER", worker, r->server); | |
| if (PROXY_WORKER_IS_USABLE(worker)) { | |
| return worker; | |
| } else { | |
| /* | |
| * We have a worker that is unusable. | |
| * It can be in error or disabled, but in case | |
| * it has a redirection set use that redirection worker. | |
| * This enables to safely remove the member from the | |
| * balancer. Of course you will need some kind of | |
| * session replication between those two remote. | |
| * Also check that we haven't gone thru all the | |
| * balancer members by means of redirects. | |
| * This should avoid redirect cycles. | |
| */ | |
| if ((*worker->s->redirect) | |
| && (recursion < balancer->workers->nelts)) { | |
| proxy_worker *rworker = NULL; | |
| rworker = find_route_worker(balancer, worker->s->redirect, | |
| r, recursion + 1); | |
| /* Check if the redirect worker is usable */ | |
| if (rworker && !PROXY_WORKER_IS_USABLE(rworker)) { | |
| /* | |
| * If the worker is in error state run | |
| * retry on that worker. It will be marked as | |
| * operational if the retry timeout is elapsed. | |
| * The worker might still be unusable, but we try | |
| * anyway. | |
| */ | |
| ap_proxy_retry_worker_fn("BALANCER", rworker, r->server); | |
| } | |
| if (rworker && PROXY_WORKER_IS_USABLE(rworker)) | |
| return rworker; | |
| } | |
| } | |
| } | |
| } | |
| } | |
| checked_standby = checking_standby++; | |
| } | |
| return NULL; | |
| } | |
| static proxy_worker *find_session_route(proxy_balancer *balancer, | |
| request_rec *r, | |
| char **route, | |
| const char **sticky_used, | |
| char **url) | |
| { | |
| proxy_worker *worker = NULL; | |
| char *url_with_qs; | |
| if (!*balancer->s->sticky) | |
| return NULL; | |
| /* | |
| * The route might be contained in the query string and *url is not | |
| * supposed to contain the query string. Hence add it temporarily if | |
| * present. | |
| */ | |
| if (r->args) { | |
| url_with_qs = apr_pstrcat(r->pool, *url, "?", r->args, NULL); | |
| } | |
| else { | |
| url_with_qs = *url; | |
| } | |
| /* Try to find the sticky route inside url */ | |
| *route = get_path_param(r->pool, url_with_qs, balancer->s->sticky_path, balancer->s->scolonsep); | |
| if (*route) { | |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01159) | |
| "Found value %s for stickysession %s", | |
| *route, balancer->s->sticky_path); | |
| *sticky_used = balancer->s->sticky_path; | |
| } | |
| else { | |
| *route = get_cookie_param(r, balancer->s->sticky); | |
| if (*route) { | |
| *sticky_used = balancer->s->sticky; | |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01160) | |
| "Found value %s for stickysession %s", | |
| *route, balancer->s->sticky); | |
| } | |
| } | |
| /* | |
| * If we found a value for stickysession, find the first '.' (or whatever | |
| * sticky_separator is set to) within. Everything after '.' (if present) | |
| * is our route. | |
| */ | |
| if ((*route) && (balancer->s->sticky_separator != 0) && ((*route = strchr(*route, balancer->s->sticky_separator)) != NULL )) | |
| (*route)++; | |
| if ((*route) && (**route)) { | |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01161) "Found route %s", *route); | |
| /* We have a route in path or in cookie | |
| * Find the worker that has this route defined. | |
| */ | |
| worker = find_route_worker(balancer, *route, r, 1); | |
| if (worker && strcmp(*route, worker->s->route)) { | |
| /* | |
| * Notice that the route of the worker chosen is different from | |
| * the route supplied by the client. | |
| */ | |
| apr_table_setn(r->subprocess_env, "BALANCER_ROUTE_CHANGED", "1"); | |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01162) | |
| "Route changed from %s to %s", | |
| *route, worker->s->route); | |
| } | |
| return worker; | |
| } | |
| else | |
| return NULL; | |
| } | |
| static proxy_worker *find_best_worker(proxy_balancer *balancer, | |
| request_rec *r) | |
| { | |
| proxy_worker *candidate = NULL; | |
| apr_status_t rv; | |
| #if APR_HAS_THREADS | |
| if ((rv = PROXY_THREAD_LOCK(balancer)) != APR_SUCCESS) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01163) | |
| "%s: Lock failed for find_best_worker()", | |
| balancer->s->name); | |
| return NULL; | |
| } | |
| #endif | |
| candidate = (*balancer->lbmethod->finder)(balancer, r); | |
| if (candidate) | |
| candidate->s->elected++; | |
| #if APR_HAS_THREADS | |
| if ((rv = PROXY_THREAD_UNLOCK(balancer)) != APR_SUCCESS) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01164) | |
| "%s: Unlock failed for find_best_worker()", | |
| balancer->s->name); | |
| } | |
| #endif | |
| if (candidate == NULL) { | |
| /* All the workers are in error state or disabled. | |
| * If the balancer has a timeout sleep for a while | |
| * and try again to find the worker. The chances are | |
| * that some other thread will release a connection. | |
| * By default the timeout is not set, and the server | |
| * returns SERVER_BUSY. | |
| */ | |
| if (balancer->s->timeout) { | |
| /* XXX: This can perhaps be build using some | |
| * smarter mechanism, like tread_cond. | |
| * But since the statuses can came from | |
| * different children, use the provided algo. | |
| */ | |
| apr_interval_time_t timeout = balancer->s->timeout; | |
| apr_interval_time_t step, tval = 0; | |
| /* Set the timeout to 0 so that we don't | |
| * end in infinite loop | |
| */ | |
| balancer->s->timeout = 0; | |
| step = timeout / 100; | |
| while (tval < timeout) { | |
| apr_sleep(step); | |
| /* Try again */ | |
| if ((candidate = find_best_worker(balancer, r))) | |
| break; | |
| tval += step; | |
| } | |
| /* restore the timeout */ | |
| balancer->s->timeout = timeout; | |
| } | |
| } | |
| return candidate; | |
| } | |
| static int balancer_fixup(request_rec *r, proxy_worker *worker, char **url) | |
| { | |
| const char *path; | |
| int rc; | |
| /* Build the proxy URL from the worker URL and the actual path */ | |
| path = strstr(*url, "://"); | |
| if (path) { | |
| path = ap_strchr_c(path + 3, '/'); | |
| } | |
| r->filename = apr_pstrcat(r->pool, "proxy:", worker->s->name, path, NULL); | |
| /* Canonicalize r->filename per the worker scheme's canon_handler hook */ | |
| rc = ap_proxy_canon_url(r); | |
| if (rc == OK) { | |
| AP_DEBUG_ASSERT(strncmp(r->filename, "proxy:", 6) == 0); | |
| *url = apr_pstrdup(r->pool, r->filename + 6); | |
| } | |
| return rc; | |
| } | |
| static void force_recovery(proxy_balancer *balancer, server_rec *s) | |
| { | |
| int i; | |
| int ok = 0; | |
| proxy_worker **worker; | |
| worker = (proxy_worker **)balancer->workers->elts; | |
| for (i = 0; i < balancer->workers->nelts; i++, worker++) { | |
| if (!((*worker)->s->status & PROXY_WORKER_IN_ERROR)) { | |
| ok = 1; | |
| break; | |
| } | |
| else { | |
| /* Try if we can recover */ | |
| ap_proxy_retry_worker_fn("BALANCER", *worker, s); | |
| if (!((*worker)->s->status & PROXY_WORKER_IN_ERROR)) { | |
| ok = 1; | |
| break; | |
| } | |
| } | |
| } | |
| if (!ok && balancer->s->forcerecovery) { | |
| /* If all workers are in error state force the recovery. | |
| */ | |
| worker = (proxy_worker **)balancer->workers->elts; | |
| for (i = 0; i < balancer->workers->nelts; i++, worker++) { | |
| ++(*worker)->s->retries; | |
| ap_proxy_set_wstatus(PROXY_WORKER_IN_ERROR_FLAG, 0, *worker); | |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(01165) | |
| "%s: Forcing recovery for worker (%s:%d)", | |
| balancer->s->name, (*worker)->s->hostname_ex, | |
| (int)(*worker)->s->port); | |
| } | |
| } | |
| } | |
| static int proxy_balancer_pre_request(proxy_worker **worker, | |
| proxy_balancer **balancer, | |
| request_rec *r, | |
| proxy_server_conf *conf, char **url) | |
| { | |
| int access_status; | |
| proxy_worker *runtime; | |
| char *route = NULL; | |
| const char *sticky = NULL; | |
| apr_status_t rv; | |
| *worker = NULL; | |
| /* Step 1: check if the url is for us | |
| * The url we can handle starts with 'balancer://' | |
| * If balancer is already provided skip the search | |
| * for balancer, because this is failover attempt. | |
| */ | |
| if (!*balancer && | |
| (ap_cstr_casecmpn(*url, BALANCER_PREFIX, sizeof(BALANCER_PREFIX) - 1) | |
| || !(*balancer = ap_proxy_get_balancer(r->pool, conf, *url, 1)))) | |
| return DECLINED; | |
| /* Step 2: Lock the LoadBalancer | |
| * XXX: perhaps we need the process lock here | |
| */ | |
| #if APR_HAS_THREADS | |
| if ((rv = PROXY_THREAD_LOCK(*balancer)) != APR_SUCCESS) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01166) | |
| "%s: Lock failed for pre_request", (*balancer)->s->name); | |
| return DECLINED; | |
| } | |
| #endif | |
| /* Step 3: force recovery */ | |
| force_recovery(*balancer, r->server); | |
| /* Step 3.5: Update member list for the balancer */ | |
| /* TODO: Implement as provider! */ | |
| ap_proxy_sync_balancer(*balancer, r->server, conf); | |
| /* Step 4: find the session route */ | |
| runtime = find_session_route(*balancer, r, &route, &sticky, url); | |
| if (runtime) { | |
| if ((*balancer)->lbmethod && (*balancer)->lbmethod->updatelbstatus) { | |
| /* Call the LB implementation */ | |
| (*balancer)->lbmethod->updatelbstatus(*balancer, runtime, r->server); | |
| } | |
| else { /* Use the default one */ | |
| int i, total_factor = 0; | |
| proxy_worker **workers; | |
| /* We have a sticky load balancer | |
| * Update the workers status | |
| * so that even session routes get | |
| * into account. | |
| */ | |
| workers = (proxy_worker **)(*balancer)->workers->elts; | |
| for (i = 0; i < (*balancer)->workers->nelts; i++) { | |
| /* Take into calculation only the workers that are | |
| * not in error state or not disabled. | |
| */ | |
| if (PROXY_WORKER_IS_USABLE(*workers)) { | |
| (*workers)->s->lbstatus += (*workers)->s->lbfactor; | |
| total_factor += (*workers)->s->lbfactor; | |
| } | |
| workers++; | |
| } | |
| runtime->s->lbstatus -= total_factor; | |
| } | |
| runtime->s->elected++; | |
| *worker = runtime; | |
| } | |
| else if (route && (*balancer)->s->sticky_force) { | |
| int i, member_of = 0; | |
| proxy_worker **workers; | |
| /* | |
| * We have a route provided that doesn't match the | |
| * balancer name. See if the provider route is the | |
| * member of the same balancer in which case return 503 | |
| */ | |
| workers = (proxy_worker **)(*balancer)->workers->elts; | |
| for (i = 0; i < (*balancer)->workers->nelts; i++) { | |
| if (*((*workers)->s->route) && strcmp((*workers)->s->route, route) == 0) { | |
| member_of = 1; | |
| break; | |
| } | |
| workers++; | |
| } | |
| if (member_of) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01167) | |
| "%s: All workers are in error state for route (%s)", | |
| (*balancer)->s->name, route); | |
| #if APR_HAS_THREADS | |
| if ((rv = PROXY_THREAD_UNLOCK(*balancer)) != APR_SUCCESS) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01168) | |
| "%s: Unlock failed for pre_request", | |
| (*balancer)->s->name); | |
| } | |
| #endif | |
| return HTTP_SERVICE_UNAVAILABLE; | |
| } | |
| } | |
| #if APR_HAS_THREADS | |
| if ((rv = PROXY_THREAD_UNLOCK(*balancer)) != APR_SUCCESS) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01169) | |
| "%s: Unlock failed for pre_request", | |
| (*balancer)->s->name); | |
| } | |
| #endif | |
| if (!*worker) { | |
| runtime = find_best_worker(*balancer, r); | |
| if (!runtime) { | |
| if ((*balancer)->workers->nelts) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01170) | |
| "%s: All workers are in error state", | |
| (*balancer)->s->name); | |
| } else { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01171) | |
| "%s: No workers in balancer", | |
| (*balancer)->s->name); | |
| } | |
| return HTTP_SERVICE_UNAVAILABLE; | |
| } | |
| if (*(*balancer)->s->sticky && runtime) { | |
| /* | |
| * This balancer has sticky sessions and the client either has not | |
| * supplied any routing information or all workers for this route | |
| * including possible redirect and hotstandby workers are in error | |
| * state, but we have found another working worker for this | |
| * balancer where we can send the request. Thus notice that we have | |
| * changed the route to the backend. | |
| */ | |
| apr_table_setn(r->subprocess_env, "BALANCER_ROUTE_CHANGED", "1"); | |
| } | |
| *worker = runtime; | |
| } | |
| ap_proxy_increment_busy_count(*worker); | |
| apr_pool_cleanup_register(r->pool, *worker, ap_proxy_decrement_busy_count, | |
| apr_pool_cleanup_null); | |
| /* Add balancer/worker info to env. */ | |
| apr_table_setn(r->subprocess_env, | |
| "BALANCER_NAME", (*balancer)->s->name); | |
| apr_table_setn(r->subprocess_env, | |
| "BALANCER_WORKER_NAME", (*worker)->s->name); | |
| apr_table_setn(r->subprocess_env, | |
| "BALANCER_WORKER_ROUTE", (*worker)->s->route); | |
| /* Rewrite the url from 'balancer://url' | |
| * to the 'worker_scheme://worker_hostname[:worker_port]/url' | |
| * This replaces the balancers fictional name with the real | |
| * hostname of the elected worker and canonicalizes according | |
| * to the worker scheme (calls canon_handler hooks). | |
| */ | |
| access_status = balancer_fixup(r, *worker, url); | |
| /* Add the session route to request notes if present */ | |
| if (route) { | |
| apr_table_setn(r->notes, "session-sticky", sticky); | |
| apr_table_setn(r->notes, "session-route", route); | |
| /* Add session info to env. */ | |
| apr_table_setn(r->subprocess_env, | |
| "BALANCER_SESSION_STICKY", sticky); | |
| apr_table_setn(r->subprocess_env, | |
| "BALANCER_SESSION_ROUTE", route); | |
| } | |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01172) | |
| "%s: worker (%s) rewritten to %s", | |
| (*balancer)->s->name, (*worker)->s->name, *url); | |
| return access_status; | |
| } | |
| static int proxy_balancer_post_request(proxy_worker *worker, | |
| proxy_balancer *balancer, | |
| request_rec *r, | |
| proxy_server_conf *conf) | |
| { | |
| apr_status_t rv; | |
| #if APR_HAS_THREADS | |
| if ((rv = PROXY_THREAD_LOCK(balancer)) != APR_SUCCESS) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01173) | |
| "%s: Lock failed for post_request", | |
| balancer->s->name); | |
| return HTTP_INTERNAL_SERVER_ERROR; | |
| } | |
| #endif | |
| if (!apr_is_empty_array(balancer->errstatuses) | |
| && !(worker->s->status & PROXY_WORKER_IGNORE_ERRORS)) { | |
| int i; | |
| for (i = 0; i < balancer->errstatuses->nelts; i++) { | |
| int val = ((int *)balancer->errstatuses->elts)[i]; | |
| if (r->status == val) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01174) | |
| "%s: Forcing worker (%s) into error state " | |
| "due to status code %d matching 'failonstatus' " | |
| "balancer parameter", | |
| balancer->s->name, ap_proxy_worker_get_name(worker), | |
| val); | |
| ap_proxy_set_wstatus(PROXY_WORKER_IN_ERROR_FLAG, 1, worker); | |
| worker->s->error_time = apr_time_now(); | |
| break; | |
| } | |
| } | |
| } | |
| if (balancer->failontimeout | |
| && !(worker->s->status & PROXY_WORKER_IGNORE_ERRORS) | |
| && (apr_table_get(r->notes, "proxy_timedout")) != NULL) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02460) | |
| "%s: Forcing worker (%s) into error state " | |
| "due to timeout and 'failontimeout' parameter being set", | |
| balancer->s->name, ap_proxy_worker_get_name(worker)); | |
| ap_proxy_set_wstatus(PROXY_WORKER_IN_ERROR_FLAG, 1, worker); | |
| worker->s->error_time = apr_time_now(); | |
| } | |
| #if APR_HAS_THREADS | |
| if ((rv = PROXY_THREAD_UNLOCK(balancer)) != APR_SUCCESS) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01175) | |
| "%s: Unlock failed for post_request", balancer->s->name); | |
| } | |
| #endif | |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01176) | |
| "proxy_balancer_post_request for (%s)", balancer->s->name); | |
| return OK; | |
| } | |
| static void recalc_factors(proxy_balancer *balancer) | |
| { | |
| int i; | |
| proxy_worker **workers; | |
| /* Recalculate lbfactors */ | |
| workers = (proxy_worker **)balancer->workers->elts; | |
| /* Special case if there is only one worker its | |
| * load factor will always be 100 | |
| */ | |
| if (balancer->workers->nelts == 1) { | |
| (*workers)->s->lbstatus = (*workers)->s->lbfactor = 100; | |
| return; | |
| } | |
| for (i = 0; i < balancer->workers->nelts; i++) { | |
| /* Update the status entries */ | |
| workers[i]->s->lbstatus = workers[i]->s->lbfactor; | |
| } | |
| } | |
| static apr_status_t lock_remove(void *data) | |
| { | |
| int i; | |
| proxy_balancer *balancer; | |
| server_rec *s = data; | |
| void *sconf = s->module_config; | |
| proxy_server_conf *conf = (proxy_server_conf *) ap_get_module_config(sconf, &proxy_module); | |
| balancer = (proxy_balancer *)conf->balancers->elts; | |
| for (i = 0; i < conf->balancers->nelts; i++, balancer++) { | |
| if (balancer->gmutex) { | |
| apr_global_mutex_destroy(balancer->gmutex); | |
| balancer->gmutex = NULL; | |
| } | |
| } | |
| return(0); | |
| } | |
| /* | |
| * Compute an ID for a vhost based on what makes it selected by requests. | |
| * The second and more Host(s)/IP(s):port(s), and the ServerAlias(es) are | |
| * optional (see make_servers_ids() below). | |
| */ | |
| static const char *make_server_id(server_rec *s, apr_pool_t *p, int full) | |
| { | |
| apr_md5_ctx_t md5_ctx; | |
| unsigned char md5[APR_MD5_DIGESTSIZE]; | |
| char host_ip[64]; /* for any IPv[46] string */ | |
| server_addr_rec *sar; | |
| int i; | |
| apr_md5_init(&md5_ctx); | |
| for (sar = s->addrs; sar; sar = sar->next) { | |
| host_ip[0] = '\0'; | |
| apr_sockaddr_ip_getbuf(host_ip, sizeof host_ip, sar->host_addr); | |
| apr_md5_update(&md5_ctx, (void *)sar->virthost, strlen(sar->virthost)); | |
| apr_md5_update(&md5_ctx, (void *)host_ip, strlen(host_ip)); | |
| apr_md5_update(&md5_ctx, (void *)&sar->host_port, | |
| sizeof(sar->host_port)); | |
| if (!full) { | |
| break; | |
| } | |
| } | |
| if (s->server_hostname) { | |
| apr_md5_update(&md5_ctx, (void *)s->server_hostname, | |
| strlen(s->server_hostname)); | |
| } | |
| if (full) { | |
| if (s->names) { | |
| for (i = 0; i < s->names->nelts; ++i) { | |
| const char *name = APR_ARRAY_IDX(s->names, i, char *); | |
| apr_md5_update(&md5_ctx, (void *)name, strlen(name)); | |
| } | |
| } | |
| if (s->wild_names) { | |
| for (i = 0; i < s->wild_names->nelts; ++i) { | |
| const char *name = APR_ARRAY_IDX(s->wild_names, i, char *); | |
| apr_md5_update(&md5_ctx, (void *)name, strlen(name)); | |
| } | |
| } | |
| } | |
| apr_md5_final(md5, &md5_ctx); | |
| return apr_pescape_hex(p, md5, sizeof md5, 0); | |
| } | |
| /* | |
| * First try to compute an unique ID for each vhost with minimal criteria, | |
| * that is the first Host/IP:port and ServerName. For most cases this should | |
| * be enough and avoids changing the ID unnecessarily across restart (or | |
| * stop/start w.r.t. persisted files) for things that this module does not | |
| * care about. | |
| * | |
| * But if it's not enough (collisions) do a second pass for the full monty, | |
| * that is additionally the other Host(s)/IP(s):port(s) and ServerAlias(es). | |
| * | |
| * Finally, for pathological configs where this is still not enough, let's | |
| * append a counter to duplicates, because we really want that ID to be unique | |
| * even if the vhost will never be selected to handle requests at run time, at | |
| * load time a duplicate may steal the original slotmems (depending on its | |
| * balancers' configurations), see how mod_slotmem_shm reuses slots/files based | |
| * solely on this ID and resets them if the sizes don't match. | |
| */ | |
| static apr_array_header_t *make_servers_ids(server_rec *main_s, apr_pool_t *p) | |
| { | |
| server_rec *s = main_s; | |
| apr_array_header_t *ids = apr_array_make(p, 10, sizeof(const char *)); | |
| apr_hash_t *dups = apr_hash_make(p); | |
| int idx, *dup, full_monty = 0; | |
| const char *id; | |
| for (idx = 0, s = main_s; s; s = s->next, ++idx) { | |
| id = make_server_id(s, p, 0); | |
| dup = apr_hash_get(dups, id, APR_HASH_KEY_STRING); | |
| apr_hash_set(dups, id, APR_HASH_KEY_STRING, | |
| apr_pmemdup(p, &idx, sizeof(int))); | |
| if (dup) { | |
| full_monty = 1; | |
| APR_ARRAY_IDX(ids, *dup, const char *) = NULL; | |
| APR_ARRAY_PUSH(ids, const char *) = NULL; | |
| } | |
| else { | |
| APR_ARRAY_PUSH(ids, const char *) = id; | |
| } | |
| } | |
| if (full_monty) { | |
| apr_hash_clear(dups); | |
| for (idx = 0, s = main_s; s; s = s->next, ++idx) { | |
| id = APR_ARRAY_IDX(ids, idx, const char *); | |
| if (id) { | |
| /* Preserve non-duplicates */ | |
| continue; | |
| } | |
| id = make_server_id(s, p, 1); | |
| if (apr_hash_get(dups, id, APR_HASH_KEY_STRING)) { | |
| id = apr_psprintf(p, "%s_%x", id, idx); | |
| } | |
| else { | |
| apr_hash_set(dups, id, APR_HASH_KEY_STRING, (void *)-1); | |
| } | |
| APR_ARRAY_IDX(ids, idx, const char *) = id; | |
| } | |
| } | |
| return ids; | |
| } | |
| /* post_config hook: */ | |
| static int balancer_post_config(apr_pool_t *pconf, apr_pool_t *plog, | |
| apr_pool_t *ptemp, server_rec *s) | |
| { | |
| apr_status_t rv; | |
| proxy_server_conf *conf; | |
| ap_slotmem_instance_t *new = NULL; | |
| apr_time_t tstamp; | |
| apr_array_header_t *ids; | |
| int idx; | |
| /* balancer_post_config() will be called twice during startup. So, don't | |
| * set up the static data the 1st time through. */ | |
| if (ap_state_query(AP_SQ_MAIN_STATE) == AP_SQ_MS_CREATE_PRE_CONFIG) { | |
| return OK; | |
| } | |
| ap_proxy_retry_worker_fn = | |
| APR_RETRIEVE_OPTIONAL_FN(ap_proxy_retry_worker); | |
| if (!ap_proxy_retry_worker_fn) { | |
| ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02230) | |
| "mod_proxy must be loaded for mod_proxy_balancer"); | |
| return !OK; | |
| } | |
| /* | |
| * Get slotmem setups | |
| */ | |
| storage = ap_lookup_provider(AP_SLOTMEM_PROVIDER_GROUP, "shm", | |
| AP_SLOTMEM_PROVIDER_VERSION); | |
| if (!storage) { | |
| ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01177) | |
| "Failed to lookup provider 'shm' for '%s': is " | |
| "mod_slotmem_shm loaded??", | |
| AP_SLOTMEM_PROVIDER_GROUP); | |
| return !OK; | |
| } | |
| ids = make_servers_ids(s, ptemp); | |
| tstamp = apr_time_now(); | |
| /* | |
| * Go thru each Vhost and create the shared mem slotmem for | |
| * each balancer's workers | |
| */ | |
| for (idx = 0; s; ++idx) { | |
| int i,j; | |
| const char *id; | |
| proxy_balancer *balancer; | |
| ap_slotmem_type_t type; | |
| void *sconf = s->module_config; | |
| conf = (proxy_server_conf *)ap_get_module_config(sconf, &proxy_module); | |
| /* | |
| * During create_proxy_config() we created a dummy id. Now that | |
| * we have identifying info, we can create the real id | |
| */ | |
| id = APR_ARRAY_IDX(ids, idx, const char *); | |
| conf->id = apr_psprintf(pconf, "p%x", | |
| ap_proxy_hashfunc(id, PROXY_HASHFUNC_DEFAULT)); | |
| if (conf->bslot) { | |
| /* Shared memory already created for this proxy_server_conf. | |
| */ | |
| s = s->next; | |
| continue; | |
| } | |
| if (conf->bal_persist) { | |
| type = AP_SLOTMEM_TYPE_PERSIST | AP_SLOTMEM_TYPE_CLEARINUSE; | |
| } else { | |
| type = 0; | |
| } | |
| if (conf->balancers->nelts) { | |
| conf->max_balancers = conf->balancers->nelts + conf->bgrowth; | |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(01178) "Doing balancers create: %d, %d (%d)", | |
| (int)ALIGNED_PROXY_BALANCER_SHARED_SIZE, | |
| (int)conf->balancers->nelts, conf->max_balancers); | |
| rv = storage->create(&new, conf->id, | |
| ALIGNED_PROXY_BALANCER_SHARED_SIZE, | |
| conf->max_balancers, type, pconf); | |
| if (rv != APR_SUCCESS) { | |
| ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, APLOGNO(01179) "balancer slotmem_create failed"); | |
| return !OK; | |
| } | |
| conf->bslot = new; | |
| } | |
| conf->storage = storage; | |
| /* Initialize shared scoreboard data */ | |
| balancer = (proxy_balancer *)conf->balancers->elts; | |
| for (i = 0; i < conf->balancers->nelts; i++, balancer++) { | |
| proxy_worker **workers; | |
| proxy_worker *worker; | |
| proxy_balancer_shared *bshm; | |
| const char *sname; | |
| unsigned int index; | |
| /* now that we have the right id, we need to redo the sname field */ | |
| ap_pstr2_alnum(pconf, balancer->s->name + sizeof(BALANCER_PREFIX) - 1, | |
| &sname); | |
| sname = apr_pstrcat(pconf, conf->id, "_", sname, NULL); | |
| PROXY_STRNCPY(balancer->s->sname, sname); /* We know this will succeed */ | |
| balancer->max_workers = balancer->workers->nelts + balancer->growth; | |
| /* Create global mutex */ | |
| rv = ap_global_mutex_create(&(balancer->gmutex), NULL, balancer_mutex_type, | |
| balancer->s->sname, s, pconf, 0); | |
| if (rv != APR_SUCCESS || !balancer->gmutex) { | |
| ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, APLOGNO(01180) | |
| "mutex creation of %s : %s failed", balancer_mutex_type, | |
| balancer->s->sname); | |
| return HTTP_INTERNAL_SERVER_ERROR; | |
| } | |
| apr_pool_cleanup_register(pconf, (void *)s, lock_remove, | |
| apr_pool_cleanup_null); | |
| /* setup shm for balancers */ | |
| bshm = ap_proxy_find_balancershm(storage, conf->bslot, balancer, &index); | |
| if (bshm) { | |
| if ((rv = storage->fgrab(conf->bslot, index)) != APR_SUCCESS) { | |
| ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, APLOGNO(02408) "balancer slotmem_fgrab failed"); | |
| return !OK; | |
| } | |
| } | |
| else { | |
| if ((rv = storage->grab(conf->bslot, &index)) != APR_SUCCESS) { | |
| ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, APLOGNO(01181) "balancer slotmem_grab failed"); | |
| return !OK; | |
| } | |
| if ((rv = storage->dptr(conf->bslot, index, (void *)&bshm)) != APR_SUCCESS) { | |
| ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, APLOGNO(01182) "balancer slotmem_dptr failed"); | |
| return !OK; | |
| } | |
| } | |
| if ((rv = ap_proxy_share_balancer(balancer, bshm, index)) != APR_SUCCESS) { | |
| ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, APLOGNO(01183) "Cannot share balancer"); | |
| return !OK; | |
| } | |
| /* create slotmem slots for workers */ | |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(01184) "Doing workers create: %s (%s), %d, %d [%u]", | |
| balancer->s->name, balancer->s->sname, | |
| (int)ALIGNED_PROXY_WORKER_SHARED_SIZE, | |
| (int)balancer->max_workers, i); | |
| rv = storage->create(&new, balancer->s->sname, | |
| ALIGNED_PROXY_WORKER_SHARED_SIZE, | |
| balancer->max_workers, type, pconf); | |
| if (rv != APR_SUCCESS) { | |
| ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, APLOGNO(01185) "worker slotmem_create failed"); | |
| return !OK; | |
| } | |
| balancer->wslot = new; | |
| balancer->storage = storage; | |
| /* sync all timestamps */ | |
| balancer->wupdated = balancer->s->wupdated = tstamp; | |
| /* now go thru each worker */ | |
| workers = (proxy_worker **)balancer->workers->elts; | |
| for (j = 0; j < balancer->workers->nelts; j++, workers++) { | |
| proxy_worker_shared *shm; | |
| worker = *workers; | |
| shm = ap_proxy_find_workershm(storage, balancer->wslot, worker, &index); | |
| if (shm) { | |
| if ((rv = storage->fgrab(balancer->wslot, index)) != APR_SUCCESS) { | |
| ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, APLOGNO(02409) "worker slotmem_fgrab failed"); | |
| return !OK; | |
| } | |
| } | |
| else { | |
| if ((rv = storage->grab(balancer->wslot, &index)) != APR_SUCCESS) { | |
| ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, APLOGNO(01186) "worker slotmem_grab failed"); | |
| return !OK; | |
| } | |
| if ((rv = storage->dptr(balancer->wslot, index, (void *)&shm)) != APR_SUCCESS) { | |
| ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, APLOGNO(01187) "worker slotmem_dptr failed"); | |
| return !OK; | |
| } | |
| } | |
| if ((rv = ap_proxy_share_worker(worker, shm, index)) != APR_SUCCESS) { | |
| ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, APLOGNO(01188) "Cannot share worker"); | |
| return !OK; | |
| } | |
| worker->s->updated = tstamp; | |
| } | |
| if (conf->bal_persist) { | |
| /* We could have just read-in a persisted config. Force a sync. */ | |
| balancer->wupdated--; | |
| ap_proxy_sync_balancer(balancer, s, conf); | |
| } | |
| } | |
| s = s->next; | |
| } | |
| return OK; | |
| } | |
| static void create_radio(const char *name, unsigned int flag, request_rec *r) | |
| { | |
| ap_rvputs(r, "<td><label for='", name, "1'>On</label> <input name='", name, "' id='", name, "1' value='1' type=radio", NULL); | |
| if (flag) | |
| ap_rputs(" checked", r); | |
| ap_rvputs(r, "> <br/> <label for='", name, "0'>Off</label> <input name='", name, "' id='", name, "0' value='0' type=radio", NULL); | |
| if (!flag) | |
| ap_rputs(" checked", r); | |
| ap_rputs("></td>\n", r); | |
| } | |
| static void push2table(const char *input, apr_table_t *params, | |
| const char *allowed[], apr_pool_t *p) | |
| { | |
| char *args; | |
| char *tok, *val; | |
| char *key; | |
| if (input == NULL) { | |
| return; | |
| } | |
| args = apr_pstrdup(p, input); | |
| key = apr_strtok(args, "&", &tok); | |
| while (key) { | |
| val = strchr(key, '='); | |
| if (val) { | |
| *val++ = '\0'; | |
| } | |
| else { | |
| val = ""; | |
| } | |
| ap_unescape_url(key); | |
| ap_unescape_url(val); | |
| /* hcuri, worker name, balancer name, at least are escaped when building the form, so twice */ | |
| ap_unescape_url(val); | |
| if (allowed == NULL) { /* allow all */ | |
| apr_table_set(params, key, val); | |
| } | |
| else { | |
| const char **ok = allowed; | |
| while (*ok) { | |
| if (strcmp(*ok, key) == 0) { | |
| apr_table_set(params, key, val); | |
| break; | |
| } | |
| ok++; | |
| } | |
| } | |
| key = apr_strtok(NULL, "&", &tok); | |
| } | |
| } | |
| /* | |
| * Add the worker `url` to `bsel` at runtime. Returns APR_SUCCESS, or | |
| * HTTP_BAD_REQUEST if it could not be added. The worker is created disabled. | |
| * | |
| * The global lock is taken first, so that no other process adds a worker | |
| * between the check that it is not there yet and its slot being taken. The | |
| * balancer's thread lock follows, for the part that changes this process's | |
| * worker array: request threads walk it holding that lock, so they never see a | |
| * worker that is not complete, and they do not wait for the global lock. Both | |
| * come before proxy_mutex, which sync and initialization take inside. A worker | |
| * whose sharing fails is taken out of the array again and its slot given back. | |
| */ | |
| static int balancer_add_worker(request_rec *r, proxy_balancer *bsel, | |
| proxy_server_conf *conf, const char *url, | |
| const char *flags) | |
| { | |
| proxy_worker *nworker; | |
| proxy_worker_shared *shm; | |
| unsigned int index = 0; | |
| apr_status_t rv; | |
| char *ret; | |
| int status = HTTP_BAD_REQUEST; | |
| #if APR_HAS_THREADS | |
| int thread_locked = 0; | |
| if ((rv = PROXY_GLOBAL_LOCK(bsel)) != APR_SUCCESS) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01194) | |
| "%s: Lock failed for adding worker", bsel->s->name); | |
| return HTTP_BAD_REQUEST; | |
| } | |
| if ((rv = PROXY_THREAD_LOCK(bsel)) != APR_SUCCESS) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(10658) | |
| "%s: Thread lock failed for adding worker", | |
| bsel->s->name); | |
| goto done; | |
| } | |
| thread_locked = 1; | |
| #endif | |
| /* Another child may have added it since this one last synced. */ | |
| ap_proxy_sync_balancer(bsel, r->server, conf); | |
| if (ap_proxy_get_worker(r->pool, bsel, conf, url) | |
| || !storage->num_free_slots(bsel->wslot)) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(10164) | |
| "%s: failed to add worker %s", bsel->s->name, url); | |
| goto done; | |
| } | |
| ret = ap_proxy_define_worker(conf->pool, &nworker, bsel, conf, url, 0); | |
| if (ret) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(10163) | |
| "%s: failed to add worker %s", bsel->s->name, url); | |
| goto done; | |
| } | |
| /* nworker is now the last element of bsel->workers. */ | |
| PROXY_COPY_CONF_PARAMS(nworker, conf); | |
| /* Optional status flags to create the worker with, and DISABLED always: | |
| * set before ap_proxy_share_worker() copies the worker to shm, so that no | |
| * child can ever find it there without them (a creator such as | |
| * mod_proxy_beacon leaves no window in which the worker exists without its | |
| * mark, or is enabled before it has been told to). */ | |
| ap_proxy_set_wstatus(PROXY_WORKER_DISABLED_FLAG, 1, nworker); | |
| if (flags) { | |
| for (; *flags; flags++) { | |
| ap_proxy_set_wstatus(*flags, 1, nworker); | |
| } | |
| } | |
| if ((rv = storage->grab(bsel->wslot, &index)) != APR_SUCCESS) { | |
| ap_log_rerror(APLOG_MARK, APLOG_EMERG, rv, r, APLOGNO(01195) | |
| "worker slotmem_grab failed"); | |
| apr_array_pop(bsel->workers); | |
| goto done; | |
| } | |
| if ((rv = storage->dptr(bsel->wslot, index, (void *)&shm)) != APR_SUCCESS) { | |
| ap_log_rerror(APLOG_MARK, APLOG_EMERG, rv, r, APLOGNO(01197) | |
| "worker slotmem_dptr failed"); | |
| storage->release(bsel->wslot, index); | |
| apr_array_pop(bsel->workers); | |
| goto done; | |
| } | |
| if ((rv = ap_proxy_share_worker(nworker, shm, index)) != APR_SUCCESS) { | |
| ap_log_rerror(APLOG_MARK, APLOG_EMERG, rv, r, APLOGNO(01199) | |
| "Cannot share worker"); | |
| storage->release(bsel->wslot, index); | |
| apr_array_pop(bsel->workers); | |
| goto done; | |
| } | |
| if ((rv = ap_proxy_initialize_worker(nworker, r->server, conf->pool)) != APR_SUCCESS) { | |
| ap_log_rerror(APLOG_MARK, APLOG_EMERG, rv, r, APLOGNO(01201) | |
| "Cannot init worker"); | |
| /* Other children find slots by their hash: empty it. */ | |
| memset(shm, 0, sizeof(*shm)); | |
| storage->release(bsel->wslot, index); | |
| apr_array_pop(bsel->workers); | |
| goto done; | |
| } | |
| /* sync all timestamps */ | |
| bsel->wupdated = bsel->s->wupdated = nworker->s->updated = apr_time_now(); | |
| status = APR_SUCCESS; | |
| done: | |
| #if APR_HAS_THREADS | |
| if (thread_locked | |
| && (rv = PROXY_THREAD_UNLOCK(bsel)) != APR_SUCCESS) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(10659) | |
| "%s: Thread unlock failed for adding worker", | |
| bsel->s->name); | |
| } | |
| if ((rv = PROXY_GLOBAL_UNLOCK(bsel)) != APR_SUCCESS) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01203) | |
| "%s: Unlock failed for adding worker", bsel->s->name); | |
| } | |
| #endif | |
| return status; | |
| } | |
| /* | |
| * Process the parameters and add or update the worker of the | |
| * balancer. Must only be called if the nonce has been validated to | |
| * match, to avoid XSS attacks. | |
| */ | |
| static int balancer_process_balancer_worker(request_rec *r, proxy_server_conf *conf, | |
| proxy_balancer *bsel, | |
| proxy_worker *wsel, | |
| apr_table_t *params) | |
| { | |
| /* First set the params */ | |
| if (wsel) { | |
| const char *val; | |
| int was_usable = PROXY_WORKER_IS_USABLE(wsel); | |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01192) "settings worker params"); | |
| if ((val = apr_table_get(params, "w_lf"))) { | |
| int ival; | |
| double fval = atof(val); | |
| ival = fval * 100.0; | |
| if (ival >= 100 && ival <= 10000) { | |
| wsel->s->lbfactor = ival; | |
| if (bsel) | |
| recalc_factors(bsel); | |
| } | |
| } | |
| if ((val = apr_table_get(params, "w_wr"))) { | |
| if (*val && strlen(val) < sizeof(wsel->s->route)) | |
| strcpy(wsel->s->route, val); | |
| else | |
| *wsel->s->route = '\0'; | |
| } | |
| if ((val = apr_table_get(params, "w_rr"))) { | |
| if (*val && strlen(val) < sizeof(wsel->s->redirect)) | |
| strcpy(wsel->s->redirect, val); | |
| else | |
| *wsel->s->redirect = '\0'; | |
| } | |
| /* | |
| * TODO: Look for all 'w_status_#' keys and then loop thru | |
| * on that # character, since the character == the flag | |
| */ | |
| if ((val = apr_table_get(params, "w_status_I"))) { | |
| ap_proxy_set_wstatus(PROXY_WORKER_IGNORE_ERRORS_FLAG, atoi(val), wsel); | |
| } | |
| if ((val = apr_table_get(params, "w_status_N"))) { | |
| ap_proxy_set_wstatus(PROXY_WORKER_DRAIN_FLAG, atoi(val), wsel); | |
| } | |
| if ((val = apr_table_get(params, "w_status_D"))) { | |
| ap_proxy_set_wstatus(PROXY_WORKER_DISABLED_FLAG, atoi(val), wsel); | |
| } | |
| if ((val = apr_table_get(params, "w_status_H"))) { | |
| ap_proxy_set_wstatus(PROXY_WORKER_HOT_STANDBY_FLAG, atoi(val), wsel); | |
| } | |
| if ((val = apr_table_get(params, "w_status_R"))) { | |
| ap_proxy_set_wstatus(PROXY_WORKER_HOT_SPARE_FLAG, atoi(val), wsel); | |
| } | |
| if ((val = apr_table_get(params, "w_status_S"))) { | |
| ap_proxy_set_wstatus(PROXY_WORKER_STOPPED_FLAG, atoi(val), wsel); | |
| } | |
| if ((val = apr_table_get(params, "w_status_C"))) { | |
| ap_proxy_set_wstatus(PROXY_WORKER_HC_FAIL_FLAG, atoi(val), wsel); | |
| } | |
| if ((val = apr_table_get(params, "w_ls"))) { | |
| int ival = atoi(val); | |
| if (ival >= 0 && ival <= 99) { | |
| wsel->s->lbset = ival; | |
| } | |
| } | |
| if ((val = apr_table_get(params, "w_hi"))) { | |
| apr_interval_time_t hci; | |
| if (ap_timeout_parameter_parse(val, &hci, "ms") == APR_SUCCESS) { | |
| if (hci >= AP_WD_TM_SLICE) { | |
| wsel->s->interval = hci; | |
| } | |
| } | |
| } | |
| if ((val = apr_table_get(params, "w_hp"))) { | |
| int ival = atoi(val); | |
| if (ival >= 1) { | |
| wsel->s->passes = ival; | |
| } | |
| } | |
| if ((val = apr_table_get(params, "w_hf"))) { | |
| int ival = atoi(val); | |
| if (ival >= 1) { | |
| wsel->s->fails = ival; | |
| } | |
| } | |
| if ((val = apr_table_get(params, "w_hm"))) { | |
| proxy_hcmethods_t *method = proxy_hcmethods; | |
| for (; method->name; method++) { | |
| if (!ap_cstr_casecmp(method->name, val) && method->implemented) | |
| wsel->s->method = method->method; | |
| } | |
| } | |
| if ((val = apr_table_get(params, "w_hu"))) { | |
| if (*val && strlen(val) < sizeof(wsel->s->hcuri)) | |
| strcpy(wsel->s->hcuri, val); | |
| else | |
| *wsel->s->hcuri = '\0'; | |
| } | |
| if (hc_valid_expr_f && (val = apr_table_get(params, "w_he"))) { | |
| if (*val && hc_valid_expr_f(r, val) && strlen(val) < sizeof(wsel->s->hcexpr)) | |
| strcpy(wsel->s->hcexpr, val); | |
| else | |
| *wsel->s->hcexpr = '\0'; | |
| } | |
| /* If the health check method doesn't support an expr, then null it */ | |
| if (wsel->s->method == NONE || wsel->s->method == TCP || wsel->s->method == CPING) { | |
| *wsel->s->hcexpr = '\0'; | |
| } | |
| /* if enabling, we need to reset all lb params */ | |
| if (bsel && !was_usable && PROXY_WORKER_IS_USABLE(wsel)) { | |
| bsel->s->need_reset = 1; | |
| } | |
| } | |
| if (bsel) { | |
| const char *val; | |
| int ival; | |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01193) | |
| "settings balancer params"); | |
| if ((val = apr_table_get(params, "b_lbm"))) { | |
| if ((strlen(val) < (sizeof(bsel->s->lbpname)-1)) && | |
| strcmp(val, bsel->s->lbpname)) { | |
| proxy_balancer_method *lbmethod; | |
| lbmethod = ap_lookup_provider(PROXY_LBMETHOD, val, "0"); | |
| if (lbmethod) { | |
| PROXY_STRNCPY(bsel->s->lbpname, val); | |
| bsel->lbmethod = lbmethod; | |
| bsel->s->wupdated = apr_time_now(); | |
| bsel->s->need_reset = 1; | |
| } | |
| } | |
| } | |
| if ((val = apr_table_get(params, "b_tmo"))) { | |
| ival = atoi(val); | |
| if (ival >= 0 && ival <= 7200) { /* 2 hrs enuff? */ | |
| bsel->s->timeout = apr_time_from_sec(ival); | |
| } | |
| } | |
| if ((val = apr_table_get(params, "b_max"))) { | |
| ival = atoi(val); | |
| if (ival >= 0 && ival <= 99) { | |
| bsel->s->max_attempts = ival; | |
| bsel->s->max_attempts_set = 1; | |
| } | |
| } | |
| if ((val = apr_table_get(params, "b_sforce"))) { | |
| ival = atoi(val); | |
| bsel->s->sticky_force = (ival != 0); | |
| } | |
| if ((val = apr_table_get(params, "b_ss")) && *val) { | |
| if (strlen(val) < (sizeof(bsel->s->sticky_path)-1)) { | |
| if (*val == '-' && *(val+1) == '\0') | |
| *bsel->s->sticky_path = *bsel->s->sticky = '\0'; | |
| else { | |
| char *path; | |
| PROXY_STRNCPY(bsel->s->sticky_path, val); | |
| PROXY_STRNCPY(bsel->s->sticky, val); | |
| if ((path = strchr((char *)bsel->s->sticky, '|'))) { | |
| *path++ = '\0'; | |
| PROXY_STRNCPY(bsel->s->sticky_path, path); | |
| } | |
| } | |
| } | |
| } | |
| if ((val = apr_table_get(params, "b_wyes")) && | |
| (*val == '1' && *(val+1) == '\0') && | |
| (val = apr_table_get(params, "b_nwrkr"))) { | |
| int rc = balancer_add_worker(r, bsel, conf, val, | |
| apr_table_get(params, "b_nwrkr_flags")); | |
| if (rc != APR_SUCCESS) { | |
| return rc; | |
| } | |
| } | |
| } | |
| return APR_SUCCESS; | |
| } | |
| /* | |
| * Process a request for balancer or worker management from another module | |
| */ | |
| static apr_status_t balancer_manage(request_rec *r, apr_table_t *params) | |
| { | |
| void *sconf; | |
| proxy_server_conf *conf; | |
| proxy_balancer *bsel = NULL; | |
| proxy_worker *wsel = NULL; | |
| const char *name; | |
| sconf = r->server->module_config; | |
| conf = (proxy_server_conf *) ap_get_module_config(sconf, &proxy_module); | |
| /* Process the parameters */ | |
| if ((name = apr_table_get(params, "b"))) { | |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "balancer_manage " | |
| "balancer: %s", name); | |
| bsel = ap_proxy_get_balancer(r->pool, conf, | |
| apr_pstrcat(r->pool, BALANCER_PREFIX, name, NULL), 0); | |
| } | |
| if ((name = apr_table_get(params, "w"))) { | |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "balancer_manage " | |
| "worker: %s", name); | |
| wsel = ap_proxy_get_worker(r->pool, bsel, conf, name); | |
| } | |
| if (bsel) { | |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "balancer_manage " | |
| "balancer: %s", bsel->s->name); | |
| return(balancer_process_balancer_worker(r, conf, bsel, wsel, params)); | |
| } | |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "balancer_manage failed: " | |
| "No balancer!"); | |
| return HTTP_BAD_REQUEST; | |
| } | |
| /* | |
| * builds the page and links to configure via HTLM or XML. | |
| */ | |
| static void balancer_display_page(request_rec *r, proxy_server_conf *conf, | |
| proxy_balancer *bsel, | |
| proxy_worker *wsel, | |
| int usexml) | |
| { | |
| const char *action; | |
| proxy_balancer *balancer; | |
| proxy_worker *worker; | |
| proxy_worker **workers; | |
| int i, n; | |
| action = ap_construct_url(r->pool, r->uri, r); | |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01204) "genning page"); | |
| if (usexml) { | |
| char date[APR_RFC822_DATE_LEN]; | |
| ap_set_content_type_ex(r, "text/xml", 1); | |
| ap_rputs("<?xml version='1.0' encoding='UTF-8' ?>\n", r); | |
| ap_rputs("<httpd:manager xmlns:httpd='http://httpd.apache.org'>\n", r); | |
| ap_rputs(" <httpd:balancers>\n", r); | |
| balancer = (proxy_balancer *)conf->balancers->elts; | |
| for (i = 0; i < conf->balancers->nelts; i++) { | |
| ap_rputs(" <httpd:balancer>\n", r); | |
| /* Start proxy_balancer */ | |
| ap_rvputs(r, " <httpd:name>", balancer->s->name, "</httpd:name>\n", NULL); | |
| ap_rvputs(r, " <httpd:nonce>", balancer->s->nonce, "</httpd:nonce>\n", NULL); | |
| if (*balancer->s->sticky) { | |
| ap_rvputs(r, " <httpd:stickysession>", ap_escape_html(r->pool, balancer->s->sticky), | |
| "</httpd:stickysession>\n", NULL); | |
| ap_rprintf(r, | |
| " <httpd:nofailover>%s</httpd:nofailover>\n", | |
| (balancer->s->sticky_force ? "On" : "Off")); | |
| } | |
| ap_rprintf(r, | |
| " <httpd:timeout>%" APR_TIME_T_FMT "</httpd:timeout>\n", | |
| apr_time_sec(balancer->s->timeout)); | |
| if (balancer->s->max_attempts_set) { | |
| ap_rprintf(r, | |
| " <httpd:maxattempts>%d</httpd:maxattempts>\n", | |
| balancer->s->max_attempts); | |
| } | |
| ap_rvputs(r, " <httpd:lbmethod>", balancer->lbmethod->name, | |
| "</httpd:lbmethod>\n", NULL); | |
| if (*balancer->s->sticky) { | |
| ap_rprintf(r, | |
| " <httpd:scolonpathdelim>%s</httpd:scolonpathdelim>\n", | |
| (balancer->s->scolonsep ? "On" : "Off")); | |
| } | |
| /* End proxy_balancer */ | |
| ap_rputs(" <httpd:workers>\n", r); | |
| workers = (proxy_worker **)balancer->workers->elts; | |
| for (n = 0; n < balancer->workers->nelts; n++) { | |
| worker = *workers; | |
| /* Start proxy_worker */ | |
| ap_rputs(" <httpd:worker>\n", r); | |
| ap_rvputs(r, " <httpd:name>", ap_proxy_worker_get_name(worker), | |
| "</httpd:name>\n", NULL); | |
| ap_rvputs(r, " <httpd:scheme>", worker->s->scheme, | |
| "</httpd:scheme>\n", NULL); | |
| ap_rvputs(r, " <httpd:hostname>", worker->s->hostname_ex, | |
| "</httpd:hostname>\n", NULL); | |
| ap_rprintf(r, " <httpd:loadfactor>%.2f</httpd:loadfactor>\n", | |
| (float)(worker->s->lbfactor)/100.0); | |
| ap_rprintf(r, | |
| " <httpd:port>%d</httpd:port>\n", | |
| worker->s->port); | |
| ap_rprintf(r, " <httpd:min>%d</httpd:min>\n", | |
| worker->s->min); | |
| ap_rprintf(r, " <httpd:smax>%d</httpd:smax>\n", | |
| worker->s->smax); | |
| ap_rprintf(r, " <httpd:max>%d</httpd:max>\n", | |
| worker->s->hmax); | |
| ap_rprintf(r, | |
| " <httpd:ttl>%" APR_TIME_T_FMT "</httpd:ttl>\n", | |
| apr_time_sec(worker->s->ttl)); | |
| if (worker->s->timeout_set) { | |
| ap_rprintf(r, | |
| " <httpd:timeout>%" APR_TIME_T_FMT "</httpd:timeout>\n", | |
| apr_time_sec(worker->s->timeout)); | |
| } | |
| if (worker->s->acquire_set) { | |
| ap_rprintf(r, | |
| " <httpd:acquire>%" APR_TIME_T_FMT "</httpd:acquire>\n", | |
| apr_time_msec(worker->s->acquire)); | |
| } | |
| if (worker->s->recv_buffer_size_set) { | |
| ap_rprintf(r, | |
| " <httpd:recv_buffer_size>%" APR_SIZE_T_FMT "</httpd:recv_buffer_size>\n", | |
| worker->s->recv_buffer_size); | |
| } | |
| if (worker->s->io_buffer_size_set) { | |
| ap_rprintf(r, | |
| " <httpd:io_buffer_size>%" APR_SIZE_T_FMT "</httpd:io_buffer_size>\n", | |
| worker->s->io_buffer_size); | |
| } | |
| if (worker->s->keepalive_set) { | |
| ap_rprintf(r, | |
| " <httpd:keepalive>%s</httpd:keepalive>\n", | |
| (worker->s->keepalive ? "On" : "Off")); | |
| } | |
| /* Begin proxy_worker_stat */ | |
| ap_rputs(" <httpd:status>", r); | |
| ap_rputs(ap_proxy_parse_wstatus(r->pool, worker), r); | |
| ap_rputs("</httpd:status>\n", r); | |
| if ((worker->s->error_time > 0) && apr_rfc822_date(date, worker->s->error_time) == APR_SUCCESS) { | |
| ap_rvputs(r, " <httpd:error_time>", date, | |
| "</httpd:error_time>\n", NULL); | |
| } | |
| ap_rprintf(r, | |
| " <httpd:retries>%d</httpd:retries>\n", | |
| worker->s->retries); | |
| ap_rprintf(r, | |
| " <httpd:lbstatus>%d</httpd:lbstatus>\n", | |
| worker->s->lbstatus); | |
| ap_rprintf(r, | |
| " <httpd:loadfactor>%.2f</httpd:loadfactor>\n", | |
| (float)(worker->s->lbfactor)/100.0); | |
| ap_rprintf(r, | |
| " <httpd:transferred>%" APR_OFF_T_FMT "</httpd:transferred>\n", | |
| worker->s->transferred); | |
| ap_rprintf(r, | |
| " <httpd:read>%" APR_OFF_T_FMT "</httpd:read>\n", | |
| worker->s->read); | |
| ap_rprintf(r, | |
| " <httpd:elected>%" APR_SIZE_T_FMT "</httpd:elected>\n", | |
| worker->s->elected); | |
| ap_rvputs(r, " <httpd:route>", | |
| ap_escape_html(r->pool, worker->s->route), | |
| "</httpd:route>\n", NULL); | |
| ap_rvputs(r, " <httpd:redirect>", | |
| ap_escape_html(r->pool, worker->s->redirect), | |
| "</httpd:redirect>\n", NULL); | |
| ap_rprintf(r, | |
| " <httpd:busy>%" APR_SIZE_T_FMT "</httpd:busy>\n", | |
| ap_proxy_get_busy_count(worker)); | |
| ap_rprintf(r, " <httpd:lbset>%d</httpd:lbset>\n", | |
| worker->s->lbset); | |
| /* End proxy_worker_stat */ | |
| if (!ap_cstr_casecmp(worker->s->scheme, "ajp")) { | |
| ap_rputs(" <httpd:flushpackets>", r); | |
| switch (worker->s->flush_packets) { | |
| case flush_off: | |
| ap_rputs("Off", r); | |
| break; | |
| case flush_on: | |
| ap_rputs("On", r); | |
| break; | |
| case flush_auto: | |
| ap_rputs("Auto", r); | |
| break; | |
| } | |
| ap_rputs("</httpd:flushpackets>\n", r); | |
| if (worker->s->flush_packets == flush_auto) { | |
| ap_rprintf(r, | |
| " <httpd:flushwait>%d</httpd:flushwait>\n", | |
| worker->s->flush_wait); | |
| } | |
| if (worker->s->ping_timeout_set) { | |
| ap_rprintf(r, | |
| " <httpd:ping>%" APR_TIME_T_FMT "</httpd:ping>", | |
| apr_time_msec(worker->s->ping_timeout)); | |
| } | |
| } | |
| if (worker->s->disablereuse_set) { | |
| ap_rprintf(r, | |
| " <httpd:disablereuse>%s</httpd:disablereuse>\n", | |
| (worker->s->disablereuse ? "On" : "Off")); | |
| } | |
| if (worker->s->conn_timeout_set) { | |
| ap_rprintf(r, | |
| " <httpd:connectiontimeout>%" APR_TIME_T_FMT "</httpd:connectiontimeout>\n", | |
| apr_time_msec(worker->s->conn_timeout)); | |
| } | |
| if (worker->s->retry_set) { | |
| ap_rprintf(r, | |
| " <httpd:retry>%" APR_TIME_T_FMT "</httpd:retry>\n", | |
| apr_time_sec(worker->s->retry)); | |
| } | |
| ap_rputs(" </httpd:worker>\n", r); | |
| ++workers; | |
| } | |
| ap_rputs(" </httpd:workers>\n", r); | |
| ap_rputs(" </httpd:balancer>\n", r); | |
| ++balancer; | |
| } | |
| ap_rputs(" </httpd:balancers>\n", r); | |
| ap_rputs("</httpd:manager>", r); | |
| } | |
| else { | |
| ap_set_content_type_ex(r, "text/html; charset=ISO-8859-1", 1); | |
| ap_rputs(DOCTYPE_HTML_4_01 | |
| "<html><head><title>Balancer Manager</title>\n", r); | |
| ap_rputs("<style type='text/css'>\n" | |
| "table {\n" | |
| " border-width: 1px;\n" | |
| " border-spacing: 3px;\n" | |
| " border-style: solid;\n" | |
| " border-color: gray;\n" | |
| " border-collapse: collapse;\n" | |
| " background-color: white;\n" | |
| " text-align: center;\n" | |
| "}\n" | |
| "th {\n" | |
| " border-width: 1px;\n" | |
| " padding: 2px;\n" | |
| " border-style: dotted;\n" | |
| " border-color: gray;\n" | |
| " background-color: lightgray;\n" | |
| " text-align: center;\n" | |
| "}\n" | |
| "td {\n" | |
| " border-width: 1px;\n" | |
| " padding: 2px;\n" | |
| " border-style: dotted;\n" | |
| " border-color: gray;\n" | |
| " background-color: white;\n" | |
| " text-align: center;\n" | |
| "}\n" | |
| "</style>\n</head>\n", r); | |
| ap_rputs("<body><h1>Load Balancer Manager for ", r); | |
| ap_rvputs(r, ap_escape_html(r->pool, ap_get_server_name(r)), | |
| "</h1>\n\n", NULL); | |
| ap_rvputs(r, "<dl><dt>Server Version: ", | |
| ap_get_server_description(), "</dt>\n", NULL); | |
| ap_rvputs(r, "<dt>Server Built: ", | |
| ap_get_server_built(), "</dt>\n", NULL); | |
| ap_rvputs(r, "<dt>Balancer changes will ", conf->bal_persist ? "" : "NOT ", | |
| "be persisted on restart.</dt>", NULL); | |
| ap_rvputs(r, "<dt>Balancers are ", conf->inherit ? "" : "NOT ", | |
| "inherited from main server.</dt>", NULL); | |
| ap_rvputs(r, "<dt>ProxyPass settings are ", conf->ppinherit ? "" : "NOT ", | |
| "inherited from main server.</dt>", NULL); | |
| ap_rputs("</dl>\n", r); | |
| balancer = (proxy_balancer *)conf->balancers->elts; | |
| for (i = 0; i < conf->balancers->nelts; i++) { | |
| ap_rputs("<hr />\n<h3>LoadBalancer Status for ", r); | |
| ap_rvputs(r, "<a href=\"", ap_escape_uri(r->pool, r->uri), "?b=", | |
| balancer->s->name + sizeof(BALANCER_PREFIX) - 1, | |
| "&nonce=", balancer->s->nonce, | |
| "\">", NULL); | |
| ap_rvputs(r, balancer->s->name, "</a> [",balancer->s->sname, "]</h3>\n", NULL); | |
| ap_rputs("\n\n<table><tr>" | |
| "<th>MaxMembers</th><th>StickySession</th><th>DisableFailover</th><th>Timeout</th><th>FailoverAttempts</th><th>Method</th>" | |
| "<th>Path</th><th>Active</th></tr>\n<tr>", r); | |
| /* the below is a safe cast, since the number of slots total will | |
| * never be more than max_workers, which is restricted to int */ | |
| ap_rprintf(r, "<td>%d [%d Used]</td>\n", balancer->max_workers, | |
| balancer->max_workers - (int)storage->num_free_slots(balancer->wslot)); | |
| if (*balancer->s->sticky) { | |
| if (strcmp(balancer->s->sticky, balancer->s->sticky_path)) { | |
| ap_rvputs(r, "<td>", ap_escape_html(r->pool, balancer->s->sticky), "|", | |
| ap_escape_html(r->pool, balancer->s->sticky_path), NULL); | |
| } | |
| else { | |
| ap_rvputs(r, "<td>", ap_escape_html(r->pool, balancer->s->sticky), NULL); | |
| } | |
| } | |
| else { | |
| ap_rputs("<td> (None) ", r); | |
| } | |
| ap_rprintf(r, "</td><td>%s</td>\n", | |
| balancer->s->sticky_force ? "On" : "Off"); | |
| ap_rprintf(r, "<td>%" APR_TIME_T_FMT "</td>", | |
| apr_time_sec(balancer->s->timeout)); | |
| ap_rprintf(r, "<td>%d</td>\n", balancer->s->max_attempts); | |
| ap_rprintf(r, "<td>%s</td>\n", | |
| balancer->s->lbpname); | |
| ap_rputs("<td>", r); | |
| if (*balancer->s->vhost) { | |
| ap_rvputs(r, balancer->s->vhost, " -> ", NULL); | |
| } | |
| ap_rvputs(r, balancer->s->vpath, "</td>\n", NULL); | |
| ap_rprintf(r, "<td>%s</td>\n", | |
| !balancer->s->inactive ? "Yes" : "No"); | |
| ap_rputs("</tr>\n</table>\n<br />", r); | |
| ap_rputs("\n\n<table><tr>" | |
| "<th>Worker URL</th>" | |
| "<th>Route</th><th>RouteRedir</th>" | |
| "<th>Factor</th><th>Set</th><th>Status</th>" | |
| "<th>Elected</th><th>Busy</th><th>Load</th><th>To</th><th>From</th>", r); | |
| if (set_worker_hc_param_f) { | |
| ap_rputs("<th>HC Method</th><th>HC Interval</th><th>Passes</th><th>Fails</th><th>HC uri</th><th>HC Expr</th>", r); | |
| } | |
| ap_rputs("</tr>\n", r); | |
| workers = (proxy_worker **)balancer->workers->elts; | |
| for (n = 0; n < balancer->workers->nelts; n++) { | |
| char fbuf[50]; | |
| worker = *workers; | |
| ap_rvputs(r, "<tr>\n<td><a href=\"", | |
| ap_escape_uri(r->pool, r->uri), "?b=", | |
| balancer->s->name + sizeof(BALANCER_PREFIX) - 1, "&w=", | |
| ap_escape_uri(r->pool, worker->s->name), | |
| "&nonce=", balancer->s->nonce, | |
| "\">", NULL); | |
| ap_rvputs(r, (*worker->s->uds_path ? "<i>" : ""), ap_proxy_worker_get_name(worker), | |
| (*worker->s->uds_path ? "</i>" : ""), "</a></td>", NULL); | |
| ap_rvputs(r, "<td>", ap_escape_html(r->pool, worker->s->route), | |
| NULL); | |
| ap_rvputs(r, "</td><td>", | |
| ap_escape_html(r->pool, worker->s->redirect), NULL); | |
| ap_rprintf(r, "</td><td>%.2f</td>", (float)(worker->s->lbfactor)/100.0); | |
| ap_rprintf(r, "<td>%d</td><td>", worker->s->lbset); | |
| ap_rvputs(r, ap_proxy_parse_wstatus(r->pool, worker), NULL); | |
| ap_rputs("</td>", r); | |
| ap_rprintf(r, "<td>%" APR_SIZE_T_FMT "</td>", worker->s->elected); | |
| ap_rprintf(r, "<td>%" APR_SIZE_T_FMT "</td>", ap_proxy_get_busy_count(worker)); | |
| ap_rprintf(r, "<td>%d</td><td>", worker->s->lbstatus); | |
| ap_rputs(apr_strfsize(worker->s->transferred, fbuf), r); | |
| ap_rputs("</td><td>", r); | |
| ap_rputs(apr_strfsize(worker->s->read, fbuf), r); | |
| if (set_worker_hc_param_f) { | |
| ap_rprintf(r, "</td><td>%s</td>", ap_proxy_show_hcmethod(worker->s->method)); | |
| ap_rprintf(r, "<td>%" APR_TIME_T_FMT "ms</td>", apr_time_as_msec(worker->s->interval)); | |
| ap_rprintf(r, "<td>%d (%d)</td>", worker->s->passes,worker->s->pcount); | |
| ap_rprintf(r, "<td>%d (%d)</td>", worker->s->fails, worker->s->fcount); | |
| ap_rprintf(r, "<td>%s</td>", ap_escape_html(r->pool, worker->s->hcuri)); | |
| ap_rprintf(r, "<td>%s", worker->s->hcexpr); | |
| } | |
| ap_rputs("</td></tr>\n", r); | |
| ++workers; | |
| } | |
| ap_rputs("</table>\n", r); | |
| ++balancer; | |
| } | |
| ap_rputs("<hr />\n", r); | |
| if (hc_show_exprs_f) { | |
| hc_show_exprs_f(r); | |
| } | |
| if (wsel && bsel) { | |
| ap_rputs("<h3>Edit worker settings for ", r); | |
| ap_rvputs(r, (*wsel->s->uds_path?"<i>":""), ap_proxy_worker_get_name(wsel), (*wsel->s->uds_path?"</i>":""), "</h3>\n", NULL); | |
| ap_rputs("<form method='POST' enctype='application/x-www-form-urlencoded' action=\"", r); | |
| ap_rvputs(r, ap_escape_uri(r->pool, action), "\">\n", NULL); | |
| ap_rputs("<table><tr><td>Load factor:</td><td><input name='w_lf' id='w_lf' type=text ", r); | |
| ap_rprintf(r, "value='%.2f'></td></tr>\n", (float)(wsel->s->lbfactor)/100.0); | |
| ap_rputs("<tr><td>LB Set:</td><td><input name='w_ls' id='w_ls' type=text ", r); | |
| ap_rprintf(r, "value='%d'></td></tr>\n", wsel->s->lbset); | |
| ap_rputs("<tr><td>Route:</td><td><input name='w_wr' id='w_wr' type=text ", r); | |
| ap_rvputs(r, "value=\"", ap_escape_html(r->pool, wsel->s->route), | |
| NULL); | |
| ap_rputs("\"></td></tr>\n", r); | |
| ap_rputs("<tr><td>Route Redirect:</td><td><input name='w_rr' id='w_rr' type=text ", r); | |
| ap_rvputs(r, "value=\"", ap_escape_html(r->pool, wsel->s->redirect), | |
| NULL); | |
| ap_rputs("\"></td></tr>\n", r); | |
| ap_rputs("<tr><td>Status:</td>", r); | |
| ap_rputs("<td><table><tr>" | |
| "<th>Ignore Errors</th>" | |
| "<th>Draining Mode</th>" | |
| "<th>Disabled</th>" | |
| "<th>Hot Standby</th>" | |
| "<th>Hot Spare</th>", r); | |
| if (hc_show_exprs_f) { | |
| ap_rputs("<th>HC Fail</th>", r); | |
| } | |
| ap_rputs("<th>Stopped</th></tr>\n<tr>", r); | |
| create_radio("w_status_I", (PROXY_WORKER_IS(wsel, PROXY_WORKER_IGNORE_ERRORS)), r); | |
| create_radio("w_status_N", (PROXY_WORKER_IS(wsel, PROXY_WORKER_DRAIN)), r); | |
| create_radio("w_status_D", (PROXY_WORKER_IS(wsel, PROXY_WORKER_DISABLED)), r); | |
| create_radio("w_status_H", (PROXY_WORKER_IS(wsel, PROXY_WORKER_HOT_STANDBY)), r); | |
| create_radio("w_status_R", (PROXY_WORKER_IS(wsel, PROXY_WORKER_HOT_SPARE)), r); | |
| if (hc_show_exprs_f) { | |
| create_radio("w_status_C", (PROXY_WORKER_IS(wsel, PROXY_WORKER_HC_FAIL)), r); | |
| } | |
| create_radio("w_status_S", (PROXY_WORKER_IS(wsel, PROXY_WORKER_STOPPED)), r); | |
| ap_rputs("</tr></table></td></tr>\n", r); | |
| if (hc_select_exprs_f) { | |
| proxy_hcmethods_t *method = proxy_hcmethods; | |
| ap_rputs("<tr><td colspan='2'>\n<table align='center'><tr><th>Health Check param</th><th>Value</th></tr>\n", r); | |
| ap_rputs("<tr><td>Method</td><td><select name='w_hm'>\n", r); | |
| for (; method->name; method++) { | |
| if (method->implemented) { | |
| ap_rprintf(r, "<option value='%s' %s >%s</option>\n", | |
| method->name, | |
| (wsel->s->method == method->method) ? "selected" : "", | |
| method->name); | |
| } | |
| } | |
| ap_rputs("</select>\n</td></tr>\n", r); | |
| ap_rputs("<tr><td>Expr</td><td><select name='w_he'>\n", r); | |
| hc_select_exprs_f(r, wsel->s->hcexpr); | |
| ap_rputs("</select>\n</td></tr>\n", r); | |
| ap_rprintf(r, "<tr><td>Interval (ms)</td><td><input name='w_hi' id='w_hi' type='text' " | |
| "value='%" APR_TIME_T_FMT "'></td></tr>\n", apr_time_as_msec(wsel->s->interval)); | |
| ap_rprintf(r, "<tr><td>Passes trigger</td><td><input name='w_hp' id='w_hp' type='text' " | |
| "value='%d'></td></tr>\n", wsel->s->passes); | |
| ap_rprintf(r, "<tr><td>Fails trigger)</td><td><input name='w_hf' id='w_hf' type='text' " | |
| "value='%d'></td></tr>\n", wsel->s->fails); | |
| ap_rprintf(r, "<tr><td>HC uri</td><td><input name='w_hu' id='w_hu' type='text' " | |
| "value=\"%s\"></td></tr>\n", ap_escape_html(r->pool, wsel->s->hcuri)); | |
| ap_rputs("</table>\n</td></tr>\n", r); | |
| } | |
| ap_rputs("<tr><td colspan='2'><input type=submit value='Submit'></td></tr>\n", r); | |
| ap_rvputs(r, "</table>\n<input type=hidden name='w' id='w' ", NULL); | |
| ap_rvputs(r, "value=\"", ap_escape_uri(r->pool, wsel->s->name), "\">\n", NULL); | |
| ap_rvputs(r, "<input type=hidden name='b' id='b' ", NULL); | |
| ap_rvputs(r, "value=\"", ap_escape_html(r->pool, bsel->s->name + sizeof(BALANCER_PREFIX) - 1), | |
| "\">\n", NULL); | |
| ap_rvputs(r, "<input type=hidden name='nonce' id='nonce' value='", | |
| bsel->s->nonce, "'>\n", NULL); | |
| ap_rputs("</form>\n", r); | |
| ap_rputs("<hr />\n", r); | |
| } else if (bsel) { | |
| const apr_array_header_t *provs; | |
| const ap_list_provider_names_t *pname; | |
| int i; | |
| ap_rputs("<h3>Edit balancer settings for ", r); | |
| ap_rvputs(r, ap_escape_html(r->pool, bsel->s->name), "</h3>\n", NULL); | |
| ap_rputs("<form method='POST' enctype='application/x-www-form-urlencoded' action=\"", r); | |
| ap_rvputs(r, ap_escape_uri(r->pool, action), "\">\n", NULL); | |
| ap_rputs("<table>\n", r); | |
| provs = ap_list_provider_names(r->pool, PROXY_LBMETHOD, "0"); | |
| if (provs) { | |
| ap_rputs("<tr><td>LBmethod:</td>", r); | |
| ap_rputs("<td>\n<select name='b_lbm' id='b_lbm'>", r); | |
| pname = (ap_list_provider_names_t *)provs->elts; | |
| for (i = 0; i < provs->nelts; i++, pname++) { | |
| ap_rvputs(r,"<option value='", pname->provider_name, "'", NULL); | |
| if (strcmp(pname->provider_name, bsel->s->lbpname) == 0) | |
| ap_rputs(" selected ", r); | |
| ap_rvputs(r, ">", pname->provider_name, "\n", NULL); | |
| } | |
| ap_rputs("</select>\n</td></tr>\n", r); | |
| } | |
| ap_rputs("<tr><td>Timeout:</td><td><input name='b_tmo' id='b_tmo' type=text ", r); | |
| ap_rprintf(r, "value='%" APR_TIME_T_FMT "'></td></tr>\n", apr_time_sec(bsel->s->timeout)); | |
| ap_rputs("<tr><td>Failover Attempts:</td><td><input name='b_max' id='b_max' type=text ", r); | |
| ap_rprintf(r, "value='%d'></td></tr>\n", bsel->s->max_attempts); | |
| ap_rputs("<tr><td>Disable Failover:</td>", r); | |
| create_radio("b_sforce", bsel->s->sticky_force, r); | |
| ap_rputs("</tr>\n", r); | |
| ap_rputs("<tr><td>Sticky Session:</td><td><input name='b_ss' id='b_ss' size=64 type=text ", r); | |
| if (strcmp(bsel->s->sticky, bsel->s->sticky_path)) { | |
| ap_rvputs(r, "value =\"", ap_escape_html(r->pool, bsel->s->sticky), "|", | |
| ap_escape_html(r->pool, bsel->s->sticky_path), NULL); | |
| } | |
| else { | |
| ap_rvputs(r, "value =\"", ap_escape_html(r->pool, bsel->s->sticky), NULL); | |
| } | |
| ap_rputs("\"> (Use '-' to delete)</td></tr>\n", r); | |
| if (storage->num_free_slots(bsel->wslot) != 0) { | |
| ap_rputs("<tr><td>Add New Worker:</td><td><input name='b_nwrkr' id='b_nwrkr' size=32 type=text>" | |
| " Are you sure? <input name='b_wyes' id='b_wyes' type=checkbox value='1'>" | |
| "</td></tr>", r); | |
| } | |
| ap_rputs("<tr><td colspan=2><input type=submit value='Submit'></td></tr>\n", r); | |
| ap_rvputs(r, "</table>\n<input type=hidden name='b' id='b' ", NULL); | |
| ap_rvputs(r, "value=\"", ap_escape_html(r->pool, bsel->s->name + sizeof(BALANCER_PREFIX) - 1), | |
| "\">\n", NULL); | |
| ap_rvputs(r, "<input type=hidden name='nonce' id='nonce' value='", | |
| bsel->s->nonce, "'>\n", NULL); | |
| ap_rputs("</form>\n", r); | |
| ap_rputs("<hr />\n", r); | |
| } | |
| ap_rputs(ap_psignature("",r), r); | |
| ap_rputs("</body></html>\n", r); | |
| ap_rflush(r); | |
| } | |
| } | |
| /* Returns non-zero if the Referer: header value passed matches the | |
| * host of the request. */ | |
| static int safe_referer(request_rec *r, const char *ref) | |
| { | |
| apr_uri_t uri; | |
| if (apr_uri_parse(r->pool, ref, &uri) || !uri.hostname) | |
| return 0; | |
| return strcasecmp(uri.hostname, ap_get_server_name(r)) == 0; | |
| } | |
| /* Manages the loadfactors and member status | |
| * The balancer, worker and nonce are obtained from | |
| * the request args (?b=...&w=...&nonce=....). | |
| * All other params are pulled from any POST | |
| * data that exists. | |
| * TODO: | |
| * /.../<whatever>/balancer/worker/nonce | |
| */ | |
| static int balancer_handler(request_rec *r) | |
| { | |
| void *sconf; | |
| proxy_server_conf *conf; | |
| proxy_balancer *balancer, *bsel = NULL; | |
| proxy_worker *wsel = NULL; | |
| apr_table_t *params; | |
| int i; | |
| const char *name, *ref; | |
| apr_status_t rv; | |
| /* is this for us? */ | |
| if (strcmp(r->handler, "balancer-manager")) { | |
| return DECLINED; | |
| } | |
| r->allowed = 0 | |
| | (AP_METHOD_BIT << M_GET) | |
| | (AP_METHOD_BIT << M_POST); | |
| if ((r->method_number != M_GET) && (r->method_number != M_POST)) { | |
| return DECLINED; | |
| } | |
| sconf = r->server->module_config; | |
| conf = (proxy_server_conf *) ap_get_module_config(sconf, &proxy_module); | |
| params = apr_table_make(r->pool, 10); | |
| balancer = (proxy_balancer *)conf->balancers->elts; | |
| for (i = 0; i < conf->balancers->nelts; i++, balancer++) { | |
| #if APR_HAS_THREADS | |
| if ((rv = PROXY_THREAD_LOCK(balancer)) != APR_SUCCESS) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01189) | |
| "%s: Lock failed for balancer_handler", | |
| balancer->s->name); | |
| return HTTP_INTERNAL_SERVER_ERROR; | |
| } | |
| #endif | |
| ap_proxy_sync_balancer(balancer, r->server, conf); | |
| #if APR_HAS_THREADS | |
| if ((rv = PROXY_THREAD_UNLOCK(balancer)) != APR_SUCCESS) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01190) | |
| "%s: Unlock failed for balancer_handler", | |
| balancer->s->name); | |
| } | |
| #endif | |
| } | |
| if (r->args && (r->method_number == M_GET)) { | |
| const char *allowed[] = { "w", "b", "nonce", "xml", NULL }; | |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01191) "parsing r->args"); | |
| push2table(r->args, params, allowed, r->pool); | |
| } | |
| if (r->method_number == M_POST) { | |
| apr_bucket_brigade *ib; | |
| apr_size_t len = 1024; | |
| char *buf = apr_pcalloc(r->pool, len+1); | |
| ib = apr_brigade_create(r->connection->pool, r->connection->bucket_alloc); | |
| rv = ap_get_brigade(r->input_filters, ib, AP_MODE_READBYTES, | |
| APR_BLOCK_READ, len); | |
| if (rv != APR_SUCCESS) { | |
| return ap_map_http_request_error(rv, HTTP_BAD_REQUEST); | |
| } | |
| apr_brigade_flatten(ib, buf, &len); | |
| buf[len] = '\0'; | |
| push2table(buf, params, NULL, r->pool); | |
| } | |
| /* Ignore parameters if this looks like XSRF */ | |
| ref = apr_table_get(r->headers_in, "Referer"); | |
| if (apr_table_elts(params) | |
| && (!ref || !safe_referer(r, ref))) { | |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(10187) | |
| "ignoring params in balancer-manager cross-site access %s: %s", ref, ap_get_server_name(r)); | |
| apr_table_clear(params); | |
| } | |
| /* Process the parameters */ | |
| if ((name = apr_table_get(params, "b"))) | |
| bsel = ap_proxy_get_balancer(r->pool, conf, | |
| apr_pstrcat(r->pool, BALANCER_PREFIX, name, NULL), 0); | |
| if ((name = apr_table_get(params, "w"))) { | |
| wsel = ap_proxy_get_worker(r->pool, bsel, conf, name); | |
| } | |
| /* Check that the supplied nonce matches this server's nonce; | |
| * otherwise don't process any input, preventing a CSRF | |
| * attacks. */ | |
| if (bsel | |
| && (*bsel->s->nonce | |
| && ((name = apr_table_get(params, "nonce")) != NULL | |
| && strcmp(bsel->s->nonce, name) == 0))) { | |
| /* Process the parameters and add the worker to the balancer */ | |
| rv = balancer_process_balancer_worker(r, conf, bsel, wsel, params); | |
| if (rv != APR_SUCCESS) { | |
| return HTTP_BAD_REQUEST; | |
| } | |
| } | |
| /* Produce response, in XML if required by parameters. */ | |
| balancer_display_page(r, conf, bsel, wsel, | |
| apr_table_get(params, "xml") != NULL); | |
| return DONE; | |
| } | |
| static void balancer_child_init(apr_pool_t *p, server_rec *s) | |
| { | |
| for (; s; s = s->next) { | |
| proxy_balancer *balancer; | |
| int i; | |
| void *sconf = s->module_config; | |
| proxy_server_conf *conf = (proxy_server_conf *)ap_get_module_config(sconf, &proxy_module); | |
| apr_status_t rv; | |
| if (conf->balancers->nelts) { | |
| apr_size_t size; | |
| unsigned int num; | |
| /* In 2.4.x we rely on the provider to return either the same | |
| * in/out &bslot, a valid new one, or NULL for failure/exit(). | |
| * TODO? for 2.6+/3.x we possibly could consider returned status | |
| * to be real failures, but e.g. NOTFOUND/ENOSHM* to continue with | |
| * existing conf->bslot (even when the returned one is NULL). | |
| * Hence handle the slotmem reuse it here where we know it's valid | |
| * both for fork()ed post_config()s and MPM winnt-like ones (run in | |
| * child process too). The provider tells what it attached or not, | |
| * and if not whether the child should stop (fatal) or continue | |
| * with the "inherited" configuration. | |
| */ | |
| rv = storage->attach(&conf->bslot, conf->id, &size, &num, p); | |
| if (!conf->bslot) { | |
| ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, APLOGNO(01205) "slotmem_attach failed"); | |
| exit(1); /* Ugly, but what else? */ | |
| } | |
| (void)rv; | |
| } | |
| balancer = (proxy_balancer *)conf->balancers->elts; | |
| for (i = 0; i < conf->balancers->nelts; i++, balancer++) { | |
| rv = ap_proxy_initialize_balancer(balancer, s, conf->pool); | |
| if (rv != APR_SUCCESS) { | |
| ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s, APLOGNO(01206) | |
| "Failed to init balancer %s in child", | |
| balancer->s->name); | |
| exit(1); /* Ugly, but what else? */ | |
| } | |
| init_balancer_members(balancer, s, conf->pool); | |
| } | |
| } | |
| } | |
| static void ap_proxy_balancer_register_hook(apr_pool_t *p) | |
| { | |
| /* Only the mpm_winnt has child init hook handler. | |
| * make sure that we are called after the mpm | |
| * initializes | |
| */ | |
| static const char *const aszPred[] = { "mpm_winnt.c", "mod_slotmem_shm.c", NULL}; | |
| static const char *const aszPred2[] = { "mod_proxy.c", NULL}; | |
| /* manager handler */ | |
| APR_REGISTER_OPTIONAL_FN(balancer_manage); | |
| ap_hook_post_config(balancer_post_config, aszPred2, NULL, APR_HOOK_MIDDLE); | |
| ap_hook_pre_config(balancer_pre_config, NULL, NULL, APR_HOOK_MIDDLE); | |
| ap_hook_handler(balancer_handler, NULL, NULL, APR_HOOK_FIRST); | |
| ap_hook_child_init(balancer_child_init, aszPred, NULL, APR_HOOK_MIDDLE); | |
| proxy_hook_pre_request(proxy_balancer_pre_request, NULL, NULL, APR_HOOK_FIRST); | |
| proxy_hook_post_request(proxy_balancer_post_request, NULL, NULL, APR_HOOK_FIRST); | |
| proxy_hook_canon_handler(proxy_balancer_canon, NULL, NULL, APR_HOOK_FIRST); | |
| } | |
| AP_DECLARE_MODULE(proxy_balancer) = { | |
| STANDARD20_MODULE_STUFF, | |
| NULL, /* create per-directory config structure */ | |
| NULL, /* merge per-directory config structures */ | |
| NULL, /* create per-server config structure */ | |
| NULL, /* merge per-server config structures */ | |
| NULL, /* command apr_table_t */ | |
| ap_proxy_balancer_register_hook /* register hooks */ | |
| }; |