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-rw-r--r--modules/proxy/mod_proxy_balancer.c1941
1 files changed, 1941 insertions, 0 deletions
diff --git a/modules/proxy/mod_proxy_balancer.c b/modules/proxy/mod_proxy_balancer.c
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+++ b/modules/proxy/mod_proxy_balancer.c
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+/* 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"
+#include "util_md5.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, *path;
+ char *search = NULL;
+ const char *err;
+ apr_port_t port = 0;
+
+ /* TODO: offset of BALANCER_PREFIX ?? */
+ if (strncasecmp(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_ex);
+ }
+ }
+}
+
+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 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 id[2 * APR_MD5_DIGESTSIZE + 1];
+ 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);
+ ap_bin2hex(md5, APR_MD5_DIGESTSIZE, id);
+
+ return apr_pstrmemdup(p, id, sizeof(id) - 1);
+}
+
+/*
+ * 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 accross 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);
+ 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;
+ 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 (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_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 (!strcasecmp(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_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",
+ worker->s->busy);
+ ap_rprintf(r, " <httpd:lbset>%d</httpd:lbset>\n",
+ worker->s->lbset);
+ /* End proxy_worker_stat */
+ if (!strcasecmp(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,
+ "&amp;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, "&amp;w=",
+ ap_escape_uri(r->pool, worker->s->name),
+ "&amp;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>%.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>", 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>%" 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>", 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='%.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='", 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("'>&nbsp;&nbsp;&nbsp;&nbsp;(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>"
+ "&nbsp;&nbsp;&nbsp;&nbsp;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 */
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 14:21:09 +0000