| /* 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 "scoreboard.h" |
| #include "ap_mpm.h" |
| #include "apr_version.h" |
| #include "ap_hooks.h" |
| #include "apr_date.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, *path; |
| char *search = NULL; |
| const char *err; |
| apr_port_t port = 0; |
| |
| /* TODO: offset of BALANCER_PREFIX ?? */ |
| if (ap_cstr_casecmpn(url, "balancer:", 9) == 0) { |
| url += 9; |
| } |
| else { |
| return DECLINED; |
| } |
| |
| ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, "canonicalising URL %s", url); |
| |
| /* do syntatic check. |
| * We break the URL into host, port, path, search |
| */ |
| 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; |
| } |
| /* |
| * now parse path/search args, according to rfc1738: |
| * process the path. With proxy-noncanon set (by |
| * mod_proxy) we use the raw, unparsed uri |
| */ |
| if (apr_table_get(r->notes, "proxy-nocanon")) { |
| path = url; /* this is the raw path */ |
| } |
| else { |
| path = ap_proxy_canonenc(r->pool, url, strlen(url), enc_path, 0, |
| r->proxyreq); |
| search = r->args; |
| } |
| if (path == NULL) |
| return HTTP_BAD_REQUEST; |
| |
| r->filename = apr_pstrcat(r->pool, "proxy:" BALANCER_PREFIX, host, |
| "/", path, (search) ? "?" : "", (search) ? search : "", NULL); |
| |
| r->path_info = apr_pstrcat(r->pool, "/", path, NULL); |
| |
| return OK; |
| } |
| |
| static void init_balancer_members(apr_pool_t *p, server_rec *s, |
| proxy_balancer *balancer) |
| { |
| int i; |
| proxy_worker **workers; |
| |
| 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_name(p, 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] == ',' || |
| isspace(start_cookie[-1])) { |
| |
| start_cookie += strlen(name); |
| while(*start_cookie && 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; |
| |
| if (!*balancer->s->sticky) |
| return NULL; |
| /* Try to find the sticky route inside url */ |
| *route = get_path_param(r->pool, *url, 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 ((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; |
| } |
| |
| candidate = (*balancer->lbmethod->finder)(balancer, r); |
| |
| if (candidate) |
| candidate->s->elected++; |
| |
| 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); |
| } |
| |
| 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 childs, 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 rewrite_url(request_rec *r, proxy_worker *worker, |
| char **url) |
| { |
| const char *scheme = strstr(*url, "://"); |
| const char *path = NULL; |
| |
| if (scheme) |
| path = ap_strchr_c(scheme + 3, '/'); |
| |
| /* we break the URL into host, port, uri */ |
| if (!worker) { |
| return ap_proxyerror(r, HTTP_BAD_REQUEST, apr_pstrcat(r->pool, |
| "missing worker. URI cannot be parsed: ", *url, |
| NULL)); |
| } |
| |
| *url = apr_pstrcat(r->pool, worker->s->name, path, NULL); |
| |
| return OK; |
| } |
| |
| 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; |
| (*worker)->s->status &= ~PROXY_WORKER_IN_ERROR; |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(01165) |
| "%s: Forcing recovery for worker (%s)", |
| balancer->s->name, (*worker)->s->hostname); |
| } |
| } |
| } |
| |
| static apr_status_t decrement_busy_count(void *worker_) |
| { |
| proxy_worker *worker = worker_; |
| |
| if (worker->s->busy) { |
| worker->s->busy--; |
| } |
| |
| return APR_SUCCESS; |
| } |
| |
| 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 && |
| !(*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 ((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; |
| } |
| |
| /* 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 ((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); |
| } |
| return HTTP_SERVICE_UNAVAILABLE; |
| } |
| } |
| |
| 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); |
| } |
| 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; |
| } |
| |
| (*worker)->s->busy++; |
| apr_pool_cleanup_register(r->pool, *worker, 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. |
| */ |
| access_status = rewrite_url(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 ((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; |
| } |
| |
| 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_name(r->pool, worker), |
| val); |
| worker->s->status |= PROXY_WORKER_IN_ERROR; |
| 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_name(r->pool, worker)); |
| worker->s->status |= PROXY_WORKER_IN_ERROR; |
| worker->s->error_time = apr_time_now(); |
| |
| } |
| |
| 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); |
| } |
| 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 1 |
| */ |
| if (balancer->workers->nelts == 1) { |
| (*workers)->s->lbstatus = (*workers)->s->lbfactor = 1; |
| 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); |
| } |
| |
| /* 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; |
| |
| /* 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; |
| } |
| |
| if (!ap_proxy_retry_worker_fn) { |
| 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; |
| } |
| |
| tstamp = apr_time_now(); |
| /* |
| * Go thru each Vhost and create the shared mem slotmem for |
| * each balancer's workers |
| */ |
| while (s) { |
| int i,j; |
| 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_psprintf(pconf, "%s.%s.%d.%s.%s.%u.%s", |
| (s->server_scheme ? s->server_scheme : "????"), |
| (s->server_hostname ? s->server_hostname : "???"), |
| (int)s->port, |
| (s->server_admin ? s->server_admin : "??"), |
| (s->defn_name ? s->defn_name : "?"), |
| s->defn_line_number, |
| (s->error_fname ? s->error_fname : DEFAULT_ERRORLOG)); |
| 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; |
| } 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); |
| 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); |
| } |
| } |
| |
| /* 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 *worker, *wsel = NULL; |
| proxy_worker **workers = NULL; |
| apr_table_t *params; |
| int i, n; |
| int ok2change = 1; |
| const char *name; |
| const char *action; |
| 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 ((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); |
| } |
| ap_proxy_sync_balancer(balancer, r->server, conf); |
| 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); |
| } |
| } |
| |
| 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); |
| } |
| 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 ignore all parameters, to prevent a CSRF attack. */ |
| if (!bsel || |
| (*bsel->s->nonce && |
| ( |
| (name = apr_table_get(params, "nonce")) == NULL || |
| strcmp(bsel->s->nonce, name) != 0 |
| ) |
| ) |
| ) { |
| apr_table_clear(params); |
| ok2change = 0; |
| } |
| |
| /* First set the params */ |
| if (wsel && ok2change) { |
| 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 = atoi(val); |
| if (ival >= 1 && ival <= 100) { |
| wsel->s->lbfactor = ival; |
| if (bsel) |
| recalc_factors(bsel); |
| } |
| } |
| if ((val = apr_table_get(params, "w_wr"))) { |
| if (strlen(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 (strlen(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_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"))) { |
| int ival = atoi(val); |
| if (ival >= HCHECK_WATHCHDOG_INTERVAL) { |
| wsel->s->interval = apr_time_from_sec(ival); |
| } |
| } |
| 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 (strlen(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 (strlen(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->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 && ok2change) { |
| 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; |
| } |
| } |
| 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"))) { |
| char *ret; |
| proxy_worker *nworker; |
| nworker = ap_proxy_get_worker(r->pool, bsel, conf, val); |
| if (!nworker && storage->num_free_slots(bsel->wslot)) { |
| 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); |
| } |
| ret = ap_proxy_define_worker(conf->pool, &nworker, bsel, conf, val, 0); |
| if (!ret) { |
| unsigned int index; |
| proxy_worker_shared *shm; |
| PROXY_COPY_CONF_PARAMS(nworker, conf); |
| if ((rv = storage->grab(bsel->wslot, &index)) != APR_SUCCESS) { |
| ap_log_rerror(APLOG_MARK, APLOG_EMERG, rv, r, APLOGNO(01195) |
| "worker slotmem_grab failed"); |
| if ((rv = PROXY_GLOBAL_UNLOCK(bsel)) != APR_SUCCESS) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01196) |
| "%s: Unlock failed for adding worker", |
| bsel->s->name); |
| } |
| return HTTP_BAD_REQUEST; |
| } |
| 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"); |
| if ((rv = PROXY_GLOBAL_UNLOCK(bsel)) != APR_SUCCESS) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01198) |
| "%s: Unlock failed for adding worker", |
| bsel->s->name); |
| } |
| return HTTP_BAD_REQUEST; |
| } |
| 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"); |
| if ((rv = PROXY_GLOBAL_UNLOCK(bsel)) != APR_SUCCESS) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01200) |
| "%s: Unlock failed for adding worker", |
| bsel->s->name); |
| } |
| return HTTP_BAD_REQUEST; |
| } |
| 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"); |
| if ((rv = PROXY_GLOBAL_UNLOCK(bsel)) != APR_SUCCESS) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01202) |
| "%s: Unlock failed for adding worker", |
| bsel->s->name); |
| } |
| return HTTP_BAD_REQUEST; |
| } |
| /* sync all timestamps */ |
| bsel->wupdated = bsel->s->wupdated = nworker->s->updated = apr_time_now(); |
| /* by default, all new workers are disabled */ |
| ap_proxy_set_wstatus(PROXY_WORKER_DISABLED_FLAG, 1, nworker); |
| } |
| 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); |
| } |
| } |
| |
| } |
| |
| } |
| |
| action = ap_construct_url(r->pool, r->uri, r); |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01204) "genning page"); |
| |
| if (apr_table_get(params, "xml")) { |
| char date[APR_RFC822_DATE_LEN]; |
| ap_set_content_type(r, "text/xml"); |
| 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); |
| if (*balancer->s->sticky) { |
| ap_rvputs(r, " <httpd:stickysession>", 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>", |
| 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_name(r->pool, 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, |
| "</httpd:hostname>\n", NULL); |
| ap_rprintf(r, " <httpd:loadfactor>%d</httpd:loadfactor>\n", |
| worker->s->lbfactor); |
| 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>%d</httpd:loadfactor>\n", |
| worker->s->lbfactor); |
| 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", |
| worker->s->busy); |
| 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(r, "text/html; charset=ISO-8859-1"); |
| ap_rputs(DOCTYPE_HTML_3_2 |
| "<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>", balancer->s->sticky, " | ", |
| balancer->s->sticky_path, NULL); |
| } |
| else { |
| ap_rvputs(r, "<td>", 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("</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_name(r->pool, 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>%d</td>", worker->s->lbfactor); |
| 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>", worker->s->busy); |
| 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>%d</td>", (int)apr_time_sec(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>", 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_name(r->pool, 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='%d'></td></tr>\n", wsel->s->lbfactor); |
| 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>", 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); |
| 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 (secs)</td><td><input name='w_hi' id='w_hi' type='text'" |
| "value='%d'></td></tr>\n", (int)apr_time_sec(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='", 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, 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><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 ='", bsel->s->sticky, " | ", |
| bsel->s->sticky_path, NULL); |
| } |
| else { |
| ap_rvputs(r, "value ='", 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='", 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); |
| } |
| return DONE; |
| } |
| |
| static void balancer_child_init(apr_pool_t *p, server_rec *s) |
| { |
| while (s) { |
| 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; |
| storage->attach(&(conf->bslot), conf->id, &size, &num, p); |
| if (!conf->bslot) { |
| ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01205) "slotmem_attach failed"); |
| exit(1); /* Ugly, but what else? */ |
| } |
| } |
| |
| balancer = (proxy_balancer *)conf->balancers->elts; |
| for (i = 0; i < conf->balancers->nelts; i++, balancer++) { |
| rv = ap_proxy_initialize_balancer(balancer, s, p); |
| |
| 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(conf->pool, s, balancer); |
| } |
| s = s->next; |
| } |
| |
| } |
| |
| 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 */ |
| 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 */ |
| }; |