#include "ap_mpm.h"
#include "apr_version.h"
#include "apr_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;
+/*
+ * 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;
+ }
+
+ 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, *search;
+ 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;
}
return DECLINED;
}
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server,
+ ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, r->server,
"proxy: BALANCER: canonicalising URL %s", url);
/* do syntatic check.
url, err);
return HTTP_BAD_REQUEST;
}
- /* now parse path/search args, according to rfc1738 */
- /* N.B. if this isn't a true proxy request, then the URL _path_
- * has already been decoded. True proxy requests have r->uri
- * == r->unparsed_uri, and no others have that property.
+ /*
+ * 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 (r->uri == r->unparsed_uri) {
- search = strchr(url, '?');
- if (search != NULL)
- *(search++) = '\0';
+ if (apr_table_get(r->notes, "proxy-nocanon")) {
+ path = url; /* this is the raw path */
}
- else
+ else {
+ path = ap_proxy_canonenc(r->pool, url, strlen(url), enc_path, 0,
+ r->proxyreq);
search = r->args;
-
- /* process path */
- path = ap_proxy_canonenc(r->pool, url, strlen(url), enc_path, 0, r->proxyreq);
+ }
if (path == NULL)
return HTTP_BAD_REQUEST;
- r->filename = apr_pstrcat(r->pool, "proxy:balancer://", host,
+ 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 int init_balancer_members(proxy_server_conf *conf, server_rec *s,
+static void init_balancer_members(proxy_server_conf *conf, server_rec *s,
proxy_balancer *balancer)
{
int i;
- proxy_worker *workers;
+ proxy_worker **workers;
- workers = (proxy_worker *)balancer->workers->elts;
+ workers = (proxy_worker **)balancer->workers->elts;
for (i = 0; i < balancer->workers->nelts; i++) {
int worker_is_initialized;
- worker_is_initialized = PROXY_WORKER_IS_INITIALIZED(workers);
- if (!worker_is_initialized) {
- proxy_worker_stat *slot;
- /*
- * If the worker is not initialized check whether its scoreboard
- * slot is already initialized.
- */
- slot = (proxy_worker_stat *) ap_get_scoreboard_lb(workers->id);
- if (slot) {
- worker_is_initialized = slot->status & PROXY_WORKER_INITIALIZED;
- }
- else {
- worker_is_initialized = 0;
- }
- }
- ap_proxy_initialize_worker_share(conf, workers, s);
- ap_proxy_initialize_worker(workers, s);
+ proxy_worker *worker = *workers;
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
+ "Looking at %s -> %s initialized?", balancer->name, worker->s->name);
+ worker_is_initialized = PROXY_WORKER_IS_INITIALIZED(worker);
if (!worker_is_initialized) {
- /* Set to the original configuration */
- workers->s->lbstatus = workers->s->lbfactor =
- (workers->lbfactor ? workers->lbfactor : 1);
- workers->s->lbset = workers->lbset;
+ ap_proxy_initialize_worker(worker, s, conf->pool);
}
++workers;
}
/* Set default number of attempts to the number of
* workers.
*/
- if (!balancer->max_attempts_set && balancer->workers->nelts > 1) {
- balancer->max_attempts = balancer->workers->nelts - 1;
- balancer->max_attempts_set = 1;
+ if (!balancer->s->max_attempts_set && balancer->workers->nelts > 1) {
+ balancer->s->max_attempts = balancer->workers->nelts - 1;
+ balancer->s->max_attempts_set = 1;
}
- return 0;
}
/* 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)
+ 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 it's value
*/
++path;
- if (strlen(path)) {
+ if (*path) {
char *q;
- path = apr_strtok(apr_pstrdup(pool, path), "?&", &q);
+ path = apr_strtok(apr_pstrdup(pool, path), pathdelims, &q);
return path;
}
}
start_cookie += strlen(name);
while(*start_cookie && isspace(*start_cookie))
++start_cookie;
- if (*start_cookie == '=' && start_cookie[1]) {
+ if (*start_cookie++ == '=' && *start_cookie) {
/*
* Session cookie was found, get it's value
*/
char *end_cookie, *cookie;
- ++start_cookie;
cookie = apr_pstrdup(r->pool, start_cookie);
if ((end_cookie = strchr(cookie, ';')) != NULL)
*end_cookie = '\0';
int i;
int checking_standby;
int checked_standby;
-
- proxy_worker *worker;
+
+ proxy_worker **workers;
checking_standby = checked_standby = 0;
while (!checked_standby) {
- worker = (proxy_worker *)balancer->workers->elts;
- for (i = 0; i < balancer->workers->nelts; i++, worker++) {
+ 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) {
{
proxy_worker *worker = NULL;
- if (!balancer->sticky)
+ if (!*balancer->s->sticky)
return NULL;
/* Try to find the sticky route inside url */
- *route = get_path_param(r->pool, *url, balancer->sticky_path);
+ *route = get_path_param(r->pool, *url, balancer->s->sticky_path, balancer->s->scolonsep);
if (*route) {
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server,
"proxy: BALANCER: Found value %s for "
- "stickysession %s", *route, balancer->sticky_path);
- *sticky_used = balancer->sticky_path;
+ "stickysession %s", *route, balancer->s->sticky_path);
+ *sticky_used = balancer->s->sticky_path;
}
else {
- *route = get_cookie_param(r, balancer->sticky);
+ *route = get_cookie_param(r, balancer->s->sticky);
if (*route) {
- *sticky_used = balancer->sticky;
+ *sticky_used = balancer->s->sticky;
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server,
"proxy: BALANCER: Found value %s for "
- "stickysession %s", *route, balancer->sticky);
+ "stickysession %s", *route, balancer->s->sticky);
}
}
/*
proxy_worker *candidate = NULL;
apr_status_t rv;
- if ((rv = PROXY_THREAD_LOCK(balancer)) != APR_SUCCESS) {
+ if ((rv = PROXY_GLOBAL_LOCK(balancer)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv, r->server,
"proxy: BALANCER: (%s). Lock failed for find_best_worker()", balancer->name);
return NULL;
}
- candidate = (*balancer->lbmethod->finder)(balancer, r);
+ candidate = (*balancer->s->lbmethod->finder)(balancer, r);
if (candidate)
candidate->s->elected++;
/*
- PROXY_THREAD_UNLOCK(balancer);
+ PROXY_GLOBAL_UNLOCK(conf);
return NULL;
*/
- if ((rv = PROXY_THREAD_UNLOCK(balancer)) != APR_SUCCESS) {
+ if ((rv = PROXY_GLOBAL_UNLOCK(balancer)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv, r->server,
"proxy: BALANCER: (%s). Unlock failed for find_best_worker()", balancer->name);
}
* By default the timeout is not set, and the server
* returns SERVER_BUSY.
*/
-#if APR_HAS_THREADS
- if (balancer->timeout) {
+ 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->timeout;
+ 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->timeout = 0;
+ balancer->s->timeout = 0;
step = timeout / 100;
while (tval < timeout) {
apr_sleep(step);
tval += step;
}
/* restore the timeout */
- balancer->timeout = timeout;
+ balancer->s->timeout = timeout;
}
-#endif
}
+
return candidate;
+
}
static int rewrite_url(request_rec *r, proxy_worker *worker,
NULL));
}
- *url = apr_pstrcat(r->pool, worker->name, path, NULL);
+ *url = apr_pstrcat(r->pool, worker->s->name, path, NULL);
return OK;
}
{
int i;
int ok = 0;
- proxy_worker *worker;
+ proxy_worker **worker;
- worker = (proxy_worker *)balancer->workers->elts;
+ worker = (proxy_worker **)balancer->workers->elts;
for (i = 0; i < balancer->workers->nelts; i++, worker++) {
- if (!(worker->s->status & PROXY_WORKER_IN_ERROR)) {
+ if (!((*worker)->s->status & PROXY_WORKER_IN_ERROR)) {
ok = 1;
- break;
+ break;
+ }
+ else {
+ /* Try if we can recover */
+ ap_proxy_retry_worker("BALANCER", *worker, s);
+ if (!((*worker)->s->status & PROXY_WORKER_IN_ERROR)) {
+ ok = 1;
+ break;
+ }
}
}
if (!ok) {
/* If all workers are in error state force the recovery.
*/
- worker = (proxy_worker *)balancer->workers->elts;
+ 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;
+ ++(*worker)->s->retries;
+ (*worker)->s->status &= ~PROXY_WORKER_IN_ERROR;
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
"proxy: BALANCER: (%s). Forcing recovery for worker (%s)",
- balancer->name, worker->hostname);
+ balancer->name, (*worker)->s->hostname);
}
}
}
/* Step 2: Lock the LoadBalancer
* XXX: perhaps we need the process lock here
*/
- if ((rv = PROXY_THREAD_LOCK(*balancer)) != APR_SUCCESS) {
+ if ((rv = PROXY_GLOBAL_LOCK(*balancer)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv, r->server,
"proxy: BALANCER: (%s). Lock failed for pre_request",
(*balancer)->name);
/* Step 3: force recovery */
force_recovery(*balancer, r->server);
+ /* Step 3.5: Update member list for the balancer */
+ /* TODO: Implement as provider! */
+ /* proxy_update_members(balancer, r, conf); */
+
/* Step 4: find the session route */
runtime = find_session_route(*balancer, r, &route, &sticky, url);
if (runtime) {
- 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.
- *
- * TODO: Abstract the below, since this is dependent
- * on the LB implementation
+ if ((*balancer)->s->lbmethod && (*balancer)->s->lbmethod->updatelbstatus) {
+ /* Call the LB implementation */
+ (*balancer)->s->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.
*/
- if (PROXY_WORKER_IS_USABLE(workers)) {
- workers->s->lbstatus += workers->s->lbfactor;
- total_factor += workers->s->lbfactor;
+ 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++;
}
- workers++;
+ runtime->s->lbstatus -= total_factor;
}
- runtime->s->lbstatus -= total_factor;
runtime->s->elected++;
*worker = runtime;
}
- else if (route && (*balancer)->sticky_force) {
+ else if (route && (*balancer)->s->sticky_force) {
int i, member_of = 0;
- proxy_worker *workers;
+ 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;
+ workers = (proxy_worker **)(*balancer)->workers->elts;
for (i = 0; i < (*balancer)->workers->nelts; i++) {
- if (*(workers->s->route) && strcmp(workers->s->route, route) == 0) {
+ if (*((*workers)->s->route) && strcmp((*workers)->s->route, route) == 0) {
member_of = 1;
break;
}
ap_log_error(APLOG_MARK, APLOG_ERR, 0, r->server,
"proxy: BALANCER: (%s). All workers are in error state for route (%s)",
(*balancer)->name, route);
- if ((rv = PROXY_THREAD_UNLOCK(*balancer)) != APR_SUCCESS) {
+ if ((rv = PROXY_GLOBAL_UNLOCK(*balancer)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv, r->server,
"proxy: BALANCER: (%s). Unlock failed for pre_request",
(*balancer)->name);
}
}
- if ((rv = PROXY_THREAD_UNLOCK(*balancer)) != APR_SUCCESS) {
+ if ((rv = PROXY_GLOBAL_UNLOCK(*balancer)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv, r->server,
"proxy: BALANCER: (%s). Unlock failed for pre_request",
(*balancer)->name);
if (!*worker) {
runtime = find_best_worker(*balancer, r);
if (!runtime) {
- ap_log_error(APLOG_MARK, APLOG_ERR, 0, r->server,
- "proxy: BALANCER: (%s). All workers are in error state",
- (*balancer)->name);
+ if ((*balancer)->workers->nelts) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, r->server,
+ "proxy: BALANCER: (%s). All workers are in error state",
+ (*balancer)->name);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, r->server,
+ "proxy: BALANCER: (%s). No workers in balancer",
+ (*balancer)->name);
+ }
return HTTP_SERVICE_UNAVAILABLE;
}
- if ((*balancer)->sticky && runtime) {
+ 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
*worker = runtime;
}
+ (*worker)->s->busy++;
+
/* Add balancer/worker info to env. */
apr_table_setn(r->subprocess_env,
"BALANCER_NAME", (*balancer)->name);
apr_table_setn(r->subprocess_env,
- "BALANCER_WORKER_NAME", (*worker)->name);
+ "BALANCER_WORKER_NAME", (*worker)->s->name);
apr_table_setn(r->subprocess_env,
"BALANCER_WORKER_ROUTE", (*worker)->s->route);
}
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server,
"proxy: BALANCER (%s) worker (%s) rewritten to %s",
- (*balancer)->name, (*worker)->name, *url);
+ (*balancer)->name, (*worker)->s->name, *url);
return access_status;
}
proxy_server_conf *conf)
{
-#if 0
apr_status_t rv;
- if ((rv = PROXY_THREAD_LOCK(balancer)) != APR_SUCCESS) {
+ if ((rv = PROXY_GLOBAL_LOCK(balancer)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv, r->server,
"proxy: BALANCER: (%s). Lock failed for post_request",
balancer->name);
return HTTP_INTERNAL_SERVER_ERROR;
}
- /* TODO: placeholder for post_request actions
- */
- if ((rv = PROXY_THREAD_UNLOCK(balancer)) != APR_SUCCESS) {
+ if (!apr_is_empty_array(balancer->errstatuses)) {
+ int i;
+ for (i = 0; i < balancer->errstatuses->nelts; i++) {
+ int val = ((int *)balancer->errstatuses->elts)[i];
+ if (r->status == val) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, rv, r->server,
+ "proxy: BALANCER: (%s). Forcing recovery for worker (%s), failonstatus %d",
+ balancer->name, worker->s->name, val);
+ worker->s->status |= PROXY_WORKER_IN_ERROR;
+ worker->s->error_time = apr_time_now();
+ break;
+ }
+ }
+ }
+
+ if ((rv = PROXY_GLOBAL_UNLOCK(balancer)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv, r->server,
"proxy: BALANCER: (%s). Unlock failed for post_request",
balancer->name);
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server,
"proxy_balancer_post_request for (%s)", balancer->name);
-#endif
+ if (worker && worker->s->busy)
+ worker->s->busy--;
return OK;
+
}
static void recalc_factors(proxy_balancer *balancer)
{
int i;
- proxy_worker *workers;
+ proxy_worker **workers;
/* Recalculate lbfactors */
- workers = (proxy_worker *)balancer->workers->elts;
+ workers = (proxy_worker **)balancer->workers->elts;
/* Special case if there is only one worker it's
* load factor will always be 1
*/
if (balancer->workers->nelts == 1) {
- workers->s->lbstatus = workers->s->lbfactor = 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;
+ 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->mutex) {
+ apr_global_mutex_destroy(balancer->mutex);
+ balancer->mutex = 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;
+ void *data;
+ void *sconf = s->module_config;
+ proxy_server_conf *conf = (proxy_server_conf *) ap_get_module_config(sconf, &proxy_module);
+ const char *userdata_key = "mod_proxy_balancer_init";
+ ap_slotmem_instance_t *new = NULL;
+
+ /* balancer_post_config() will be called twice during startup. So, only
+ * set up the static data the 1st time through. */
+ apr_pool_userdata_get(&data, userdata_key, s->process->pool);
+ if (!data) {
+ apr_pool_userdata_set((const void *)1, userdata_key,
+ apr_pool_cleanup_null, s->process->pool);
+ return OK;
+ }
+
+ /*
+ * Get slotmem setups
+ */
+ storage = ap_lookup_provider(AP_SLOTMEM_PROVIDER_GROUP, "shared", "0");
+ if (!storage) {
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_EMERG, 0, s,
+ "ap_lookup_provider %s failed", AP_SLOTMEM_PROVIDER_GROUP);
+ return !OK;
+ }
+
+
+ /*
+ * Go thru each Vhost and create the shared mem slotmem for
+ * each balancer's workers
+ */
+ while (s) {
+ int i,j;
+ proxy_balancer *balancer;
+ sconf = s->module_config;
+ conf = (proxy_server_conf *)ap_get_module_config(sconf, &proxy_module);
+
+ if (conf->balancers->nelts) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "Doing balancers create: %d, %d",
+ (int)ALIGNED_PROXY_BALANCER_SHARED_SIZE,
+ (int)conf->balancers->nelts);
+
+ rv = storage->create(&new, conf->id,
+ ALIGNED_PROXY_BALANCER_SHARED_SIZE,
+ conf->balancers->nelts, AP_SLOTMEM_TYPE_PREGRAB, pconf);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, "balancer slotmem_create failed");
+ return !OK;
+ }
+ conf->slot = new;
+ }
+
+ /* 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;
+ unsigned int index;
+
+ balancer->max_workers = balancer->workers->nelts + balancer->growth;
+ /* no need for the 'balancer://' prefix */
+ ap_pstr2_alnum(pconf, balancer->name + sizeof(BALANCER_PREFIX) - 1,
+ &balancer->sname);
+ balancer->sname = apr_pstrcat(pconf, conf->id, "_", balancer->sname, NULL);
+
+ /* Create global mutex */
+ rv = ap_global_mutex_create(&(balancer->mutex), NULL, balancer_mutex_type,
+ balancer->sname, s, pconf, 0);
+ if (rv != APR_SUCCESS || !balancer->mutex) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s,
+ "mutex creation of %s : %s failed", balancer_mutex_type,
+ balancer->sname);
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+
+ apr_pool_cleanup_register(pconf, (void *)s, lock_remove,
+ apr_pool_cleanup_null);
+
+ /* setup shm for balancers */
+ if ((rv = storage->grab(conf->slot, &index)) != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, "balancer slotmem_grab failed");
+ return !OK;
+
+ }
+ if ((rv = storage->dptr(conf->slot, index, (void *)&bshm)) != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, "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, "Cannot share balancer");
+ return !OK;
+ }
+
+ /* create slotmem slots for workers */
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "Doing workers create: %s (%s), %d, %d",
+ balancer->name, balancer->sname,
+ (int)ALIGNED_PROXY_WORKER_SHARED_SIZE,
+ (int)balancer->max_workers);
+
+ rv = storage->create(&new, balancer->sname,
+ ALIGNED_PROXY_WORKER_SHARED_SIZE,
+ balancer->max_workers, AP_SLOTMEM_TYPE_PREGRAB, pconf);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, "worker slotmem_create failed");
+ return !OK;
+ }
+ balancer->slot = new;
+
+ /* 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;
+ if ((rv = storage->grab(balancer->slot, &index)) != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, "worker slotmem_grab failed");
+ return !OK;
+
+ }
+ if ((rv = storage->dptr(balancer->slot, index, (void *)&shm)) != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, "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, "Cannot share worker");
+ return !OK;
+ }
+ }
+ }
+ s = s->next;
+ }
+
+ return OK;
+}
+
/* Manages the loadfactors and member status
*/
static int balancer_handler(request_rec *r)
{
- void *sconf = r->server->module_config;
- proxy_server_conf *conf = (proxy_server_conf *)
- ap_get_module_config(sconf, &proxy_module);
+ void *sconf;
+ proxy_server_conf *conf;
proxy_balancer *balancer, *bsel = NULL;
proxy_worker *worker, *wsel = NULL;
- apr_table_t *params = apr_table_make(r->pool, 10);
+ proxy_worker **workers = NULL;
+ apr_table_t *params;
int access_status;
int i, n;
+ int ok2change = 1;
const char *name;
/* is this for us? */
- if (strcmp(r->handler, "balancer-manager"))
+ if (strcmp(r->handler, "balancer-manager")) {
return DECLINED;
+ }
+
r->allowed = (AP_METHOD_BIT << M_GET);
- if (r->method_number != M_GET)
+ if (r->method_number != M_GET) {
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);
if (r->args) {
char *args = apr_pstrdup(r->pool, r->args);
return HTTP_BAD_REQUEST;
}
}
+
if ((name = apr_table_get(params, "b")))
bsel = ap_proxy_get_balancer(r->pool, conf,
- apr_pstrcat(r->pool, "balancer://", name, NULL));
+ apr_pstrcat(r->pool, BALANCER_PREFIX, name, NULL));
+
if ((name = apr_table_get(params, "w"))) {
- proxy_worker *ws;
-
- ws = ap_proxy_get_worker(r->pool, conf, name);
- if (bsel && ws) {
- worker = (proxy_worker *)bsel->workers->elts;
- for (n = 0; n < bsel->workers->nelts; n++) {
- if (strcasecmp(worker->name, ws->name) == 0) {
- wsel = worker;
- break;
- }
- ++worker;
- }
- }
+ 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 */
- /*
- * Note that it is not possible set the proxy_balancer because it is not
- * in shared memory.
- */
- if (wsel) {
+ if (wsel && ok2change) {
const char *val;
if ((val = apr_table_get(params, "lf"))) {
int ival = atoi(val);
}
}
if ((val = apr_table_get(params, "wr"))) {
- if (strlen(val) && strlen(val) < PROXY_WORKER_MAX_ROUTE_SIZ)
+ 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, "rr"))) {
- if (strlen(val) && strlen(val) < PROXY_WORKER_MAX_ROUTE_SIZ)
+ if (strlen(val) && strlen(val) < sizeof(wsel->s->redirect))
strcpy(wsel->s->redirect, val);
else
*wsel->s->redirect = '\0';
}
}
+
+ if (bsel && ok2change) {
+ const char *val;
+ if ((val = apr_table_get(params, "lbm"))) {
+ proxy_balancer_method *lbmethod;
+ lbmethod = ap_lookup_provider(PROXY_LBMETHOD, val, "0");
+ if (lbmethod)
+ bsel->s->lbmethod = lbmethod;
+ }
+ }
+
if (apr_table_get(params, "xml")) {
ap_set_content_type(r, "text/xml");
ap_rputs("<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n", r);
ap_rputs(" <httpd:balancer>\n", r);
ap_rvputs(r, " <httpd:name>", balancer->name, "</httpd:name>\n", NULL);
ap_rputs(" <httpd:workers>\n", r);
- worker = (proxy_worker *)balancer->workers->elts;
+ workers = (proxy_worker **)balancer->workers->elts;
for (n = 0; n < balancer->workers->nelts; n++) {
+ worker = *workers;
ap_rputs(" <httpd:worker>\n", r);
- ap_rvputs(r, " <httpd:scheme>", worker->scheme,
+ ap_rvputs(r, " <httpd:scheme>", worker->s->scheme,
"</httpd:scheme>\n", NULL);
- ap_rvputs(r, " <httpd:hostname>", worker->hostname,
+ ap_rvputs(r, " <httpd:hostname>", worker->s->hostname,
"</httpd:hostname>\n", NULL);
- ap_rprintf(r, " <httpd:loadfactor>%d</httpd:loadfactor>\n",
+ ap_rprintf(r, " <httpd:loadfactor>%d</httpd:loadfactor>\n",
worker->s->lbfactor);
ap_rputs(" </httpd:worker>\n", r);
- ++worker;
+ ++workers;
}
ap_rputs(" </httpd:workers>\n", r);
ap_rputs(" </httpd:balancer>\n", r);
for (i = 0; i < conf->balancers->nelts; i++) {
ap_rputs("<hr />\n<h3>LoadBalancer Status for ", r);
- ap_rvputs(r, balancer->name, "</h3>\n\n", NULL);
+ ap_rvputs(r, "<a href=\"", r->uri, "?b=",
+ balancer->name + sizeof(BALANCER_PREFIX) - 1,
+ "&nonce=", balancer->s->nonce,
+ "\">", NULL);
+ ap_rvputs(r, balancer->name, "</a></h3>\n\n", NULL);
ap_rputs("\n\n<table border=\"0\" style=\"text-align: left;\"><tr>"
- "<th>StickySession</th><th>Timeout</th><th>FailoverAttempts</th><th>Method</th>"
+ "<th>MaxMembers</th><th>StickySession</th><th>Timeout</th><th>FailoverAttempts</th><th>Method</th>"
"</tr>\n<tr>", r);
- if (balancer->sticky) {
- if (strcmp(balancer->sticky, balancer->sticky_path)) {
- ap_rvputs(r, "<td>", balancer->sticky, " | ",
- balancer->sticky_path, NULL);
+ ap_rprintf(r, "<td align=\"center\">%d</td>\n", balancer->max_workers);
+ if (*balancer->s->sticky) {
+ if (strcmp(balancer->s->sticky, balancer->s->sticky_path)) {
+ ap_rvputs(r, "<td align=\"center\">", balancer->s->sticky, " | ",
+ balancer->s->sticky_path, NULL);
}
else {
- ap_rvputs(r, "<td>", balancer->sticky, NULL);
+ ap_rvputs(r, "<td align=\"center\">", balancer->s->sticky, NULL);
}
}
else {
- ap_rputs("<td> - ", r);
+ ap_rputs("<td align=\"center\"> - ", r);
}
- ap_rprintf(r, "</td><td>%" APR_TIME_T_FMT "</td>",
- apr_time_sec(balancer->timeout));
- ap_rprintf(r, "<td>%d</td>\n", balancer->max_attempts);
- ap_rprintf(r, "<td>%s</td>\n",
- balancer->lbmethod->name);
+ ap_rprintf(r, "</td><td align=\"center\">%" APR_TIME_T_FMT "</td>",
+ apr_time_sec(balancer->s->timeout));
+ ap_rprintf(r, "<td align=\"center\">%d</td>\n", balancer->s->max_attempts);
+ ap_rprintf(r, "<td align=\"center\">%s</td>\n",
+ balancer->s->lbmethod->name);
ap_rputs("</table>\n<br />", r);
ap_rputs("\n\n<table border=\"0\" style=\"text-align: left;\"><tr>"
"<th>Worker URL</th>"
"<th>Elected</th><th>To</th><th>From</th>"
"</tr>\n", r);
- worker = (proxy_worker *)balancer->workers->elts;
+ 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=\"", r->uri, "?b=",
- balancer->name + sizeof("balancer://") - 1, "&w=",
- ap_escape_uri(r->pool, worker->name),
+ balancer->name + sizeof(BALANCER_PREFIX) - 1, "&w=",
+ ap_escape_uri(r->pool, worker->s->name),
+ "&nonce=", balancer->s->nonce,
"\">", NULL);
- ap_rvputs(r, worker->name, "</a></td>", NULL);
- ap_rvputs(r, "<td>", ap_escape_html(r->pool, worker->s->route),
+ ap_rvputs(r, worker->s->name, "</a></td>", NULL);
+ ap_rvputs(r, "<td align=\"center\">", ap_escape_html(r->pool, worker->s->route),
NULL);
- ap_rvputs(r, "</td><td>",
+ ap_rvputs(r, "</td><td align=\"center\">",
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);
- if (worker->s->status & PROXY_WORKER_DISABLED)
- ap_rputs("Dis ", r);
- if (worker->s->status & PROXY_WORKER_IN_ERROR)
- ap_rputs("Err ", r);
- if (worker->s->status & PROXY_WORKER_STOPPED)
- ap_rputs("Stop ", r);
- if (worker->s->status & PROXY_WORKER_HOT_STANDBY)
- ap_rputs("Stby ", r);
- if (PROXY_WORKER_IS_USABLE(worker))
- ap_rputs("Ok", r);
- if (!PROXY_WORKER_IS_INITIALIZED(worker))
- ap_rputs("-", r);
+ ap_rprintf(r, "</td><td align=\"center\">%d</td>", worker->s->lbfactor);
+ ap_rprintf(r, "<td align=\"center\">%d</td><td align=\"center\">", 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><td>", worker->s->elected);
+ ap_rprintf(r, "<td align=\"center\">%" APR_SIZE_T_FMT "</td><td align=\"center\">", worker->s->elected);
ap_rputs(apr_strfsize(worker->s->transferred, fbuf), r);
- ap_rputs("</td><td>", r);
+ ap_rputs("</td><td align=\"center\">", r);
ap_rputs(apr_strfsize(worker->s->read, fbuf), r);
ap_rputs("</td></tr>\n", r);
- ++worker;
+ ++workers;
}
ap_rputs("</table>\n", r);
++balancer;
ap_rputs("<hr />\n", r);
if (wsel && bsel) {
ap_rputs("<h3>Edit worker settings for ", r);
- ap_rvputs(r, wsel->name, "</h3>\n", NULL);
+ ap_rvputs(r, wsel->s->name, "</h3>\n", NULL);
ap_rvputs(r, "<form method=\"GET\" action=\"", NULL);
ap_rvputs(r, r->uri, "\">\n<dl>", NULL);
ap_rputs("<table><tr><td>Load factor:</td><td><input name=\"lf\" type=text ", r);
ap_rputs("></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\" ", NULL);
- ap_rvputs(r, "value=\"", ap_escape_uri(r->pool, wsel->name), "\">\n", NULL);
+ ap_rvputs(r, "value=\"", ap_escape_uri(r->pool, wsel->s->name), "\">\n", NULL);
ap_rvputs(r, "<input type=hidden name=\"b\" ", NULL);
- ap_rvputs(r, "value=\"", bsel->name + sizeof("balancer://") - 1,
- "\">\n</form>\n", NULL);
+ ap_rvputs(r, "value=\"", bsel->name + sizeof(BALANCER_PREFIX) - 1,
+ "\">\n", NULL);
+ ap_rvputs(r, "<input type=hidden name=\"nonce\" value=\"",
+ bsel->s->nonce, "\">\n", NULL);
+ ap_rvputs(r, "</form>\n", NULL);
+ 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->name, "</h3>\n", NULL);
+ ap_rvputs(r, "<form method=\"GET\" action=\"", NULL);
+ ap_rvputs(r, r->uri, "\">\n<dl>\n<table>\n", NULL);
+ 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=\"lbm\" id=\"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->lbmethod->name) == 0)
+ ap_rputs(" selected ", r);
+ ap_rvputs(r, ">", pname->provider_name, "\n", NULL);
+ }
+ ap_rputs("</select>\n</td></tr>\n", r);
+ }
+ ap_rputs("</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=\"b\" ", NULL);
+ ap_rvputs(r, "value=\"", bsel->name + sizeof(BALANCER_PREFIX) - 1,
+ "\">\n", NULL);
+ ap_rvputs(r, "<input type=hidden name=\"nonce\" value=\"",
+ bsel->s->nonce, "\">\n", NULL);
+ ap_rvputs(r, "</form>\n", NULL);
ap_rputs("<hr />\n", r);
}
ap_rputs(ap_psignature("",r), r);
ap_rputs("</body></html>\n", r);
- }
+}
return OK;
}
-static void child_init(apr_pool_t *p, server_rec *s)
+static void balancer_child_init(apr_pool_t *p, server_rec *s)
{
while (s) {
- void *sconf = s->module_config;
- proxy_server_conf *conf;
proxy_balancer *balancer;
int i;
- conf = (proxy_server_conf *)ap_get_module_config(sconf, &proxy_module);
-
- /* Initialize shared scoreboard data */
+ void *sconf = s->module_config;
+ proxy_server_conf *conf = (proxy_server_conf *)ap_get_module_config(sconf, &proxy_module);
+ apr_size_t size;
+ unsigned int num;
+ apr_status_t rv;
+
+ if (conf->balancers->nelts) {
+ storage->attach(&(conf->slot), conf->id, &size, &num, p);
+ if (!conf->slot) {
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_EMERG, 0, s, "slotmem_attach failed");
+ exit(1); /* Ugly, but what else? */
+ }
+ }
+
balancer = (proxy_balancer *)conf->balancers->elts;
for (i = 0; i < conf->balancers->nelts; i++) {
- init_balancer_members(conf, s, balancer);
- balancer++;
- }
- s = s->next;
- }
-
-}
-
-/*
- * The idea behind the find_best_byrequests scheduler is the following:
- *
- * lbfactor is "how much we expect this worker to work", or "the worker's
- * normalized work quota".
- *
- * lbstatus is "how urgent this worker has to work to fulfill its quota
- * of work".
- *
- * We distribute each worker's work quota to the worker, and then look
- * which of them needs to work most urgently (biggest lbstatus). This
- * worker is then selected for work, and its lbstatus reduced by the
- * total work quota we distributed to all workers. Thus the sum of all
- * lbstatus does not change.(*)
- *
- * If some workers are disabled, the others will
- * still be scheduled correctly.
- *
- * If a balancer is configured as follows:
- *
- * worker a b c d
- * lbfactor 25 25 25 25
- *
- * And b gets disabled, the following schedule is produced:
- *
- * a c d a c d a c d ...
- *
- * Note that the above lbfactor setting is the *exact* same as:
- *
- * worker a b c d
- * lbfactor 1 1 1 1
- *
- * Asymmetric configurations work as one would expect. For
- * example:
- *
- * worker a b c d
- * lbfactor 1 1 1 2
- *
- * would have a, b and c all handling about the same
- * amount of load with d handling twice what a or b
- * or c handles individually. So we could see:
- *
- * b a d c d a c d b d ...
- *
- */
-static proxy_worker *find_best_byrequests(proxy_balancer *balancer,
- request_rec *r)
-{
- int i;
- int total_factor = 0;
- proxy_worker *worker;
- proxy_worker *mycandidate = NULL;
- int cur_lbset = 0;
- int max_lbset = 0;
- int checking_standby;
- int checked_standby;
-
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server,
- "proxy: Entering byrequests for BALANCER (%s)",
- balancer->name);
-
- /* First try to see if we have available candidate */
- do {
- checking_standby = checked_standby = 0;
- while (!mycandidate && !checked_standby) {
- worker = (proxy_worker *)balancer->workers->elts;
- for (i = 0; i < balancer->workers->nelts; i++, worker++) {
- if (!checking_standby) { /* first time through */
- if (worker->s->lbset > max_lbset)
- max_lbset = worker->s->lbset;
- }
- if (worker->s->lbset > cur_lbset)
- continue;
- if ( (checking_standby ? !PROXY_WORKER_IS_STANDBY(worker) : PROXY_WORKER_IS_STANDBY(worker)) )
- continue;
- /* 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.
- */
- if (!PROXY_WORKER_IS_USABLE(worker))
- ap_proxy_retry_worker("BALANCER", worker, r->server);
- /* Take into calculation only the workers that are
- * not in error state or not disabled.
- */
- if (PROXY_WORKER_IS_USABLE(worker)) {
- worker->s->lbstatus += worker->s->lbfactor;
- total_factor += worker->s->lbfactor;
- if (!mycandidate || worker->s->lbstatus > mycandidate->s->lbstatus)
- mycandidate = worker;
- }
+ /*
+ * for each balancer we need to init the global
+ * mutex and then attach to the shared worker shm
+ */
+ if (!balancer->mutex) {
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, s,
+ "no mutex %s: %s", balancer->name,
+ balancer_mutex_type);
+ return;
}
- checked_standby = checking_standby++;
- }
- cur_lbset++;
- } while (cur_lbset <= max_lbset && !mycandidate);
-
- if (mycandidate) {
- mycandidate->s->lbstatus -= total_factor;
- }
-
- return mycandidate;
-}
-/*
- * The idea behind the find_best_bytraffic scheduler is the following:
- *
- * We know the amount of traffic (bytes in and out) handled by each
- * worker. We normalize that traffic by each workers' weight. So assuming
- * a setup as below:
- *
- * worker a b c
- * lbfactor 1 1 3
- *
- * the scheduler will allow worker c to handle 3 times the
- * traffic of a and b. If each request/response results in the
- * same amount of traffic, then c would be accessed 3 times as
- * often as a or b. If, for example, a handled a request that
- * resulted in a large i/o bytecount, then b and c would be
- * chosen more often, to even things out.
- */
-static proxy_worker *find_best_bytraffic(proxy_balancer *balancer,
- request_rec *r)
-{
- int i;
- apr_off_t mytraffic = 0;
- apr_off_t curmin = 0;
- proxy_worker *worker;
- proxy_worker *mycandidate = NULL;
- int cur_lbset = 0;
- int max_lbset = 0;
- int checking_standby;
- int checked_standby;
+ /* Re-open the mutex for the child. */
+ rv = apr_global_mutex_child_init(&(balancer->mutex),
+ apr_global_mutex_lockfile(balancer->mutex),
+ p);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s,
+ "Failed to reopen mutex %s: %s in child",
+ balancer->name, balancer_mutex_type);
+ exit(1); /* Ugly, but what else? */
+ }
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server,
- "proxy: Entering bytraffic for BALANCER (%s)",
- balancer->name);
-
- /* First try to see if we have available candidate */
- do {
- checking_standby = checked_standby = 0;
- while (!mycandidate && !checked_standby) {
- worker = (proxy_worker *)balancer->workers->elts;
- for (i = 0; i < balancer->workers->nelts; i++, worker++) {
- if (!checking_standby) { /* first time through */
- if (worker->s->lbset > max_lbset)
- max_lbset = worker->s->lbset;
- }
- if (worker->s->lbset > cur_lbset)
- continue;
- if ( (checking_standby ? !PROXY_WORKER_IS_STANDBY(worker) : PROXY_WORKER_IS_STANDBY(worker)) )
- continue;
- /* 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.
- */
- if (!PROXY_WORKER_IS_USABLE(worker))
- ap_proxy_retry_worker("BALANCER", worker, r->server);
- /* Take into calculation only the workers that are
- * not in error state or not disabled.
- */
- if (PROXY_WORKER_IS_USABLE(worker)) {
- mytraffic = (worker->s->transferred/worker->s->lbfactor) +
- (worker->s->read/worker->s->lbfactor);
- if (!mycandidate || mytraffic < curmin) {
- mycandidate = worker;
- curmin = mytraffic;
- }
- }
+ /* now attach */
+ storage->attach(&(balancer->slot), balancer->sname, &size, &num, p);
+ if (!balancer->slot) {
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_EMERG, 0, s, "slotmem_attach failed");
+ exit(1); /* Ugly, but what else? */
}
- checked_standby = checking_standby++;
+ if (balancer->s->lbmethod && balancer->s->lbmethod->reset)
+ balancer->s->lbmethod->reset(balancer, s);
+ init_balancer_members(conf, s, balancer);
+ balancer++;
}
- cur_lbset++;
- } while (cur_lbset <= max_lbset && !mycandidate);
+ s = s->next;
+ }
- return mycandidate;
}
-/*
- * How to add additional lbmethods:
- * 1. Create func which determines "best" candidate worker
- * (eg: find_best_bytraffic, above)
- * 2. Register it as a provider.
- */
-static const proxy_balancer_method byrequests =
-{
- "byrequests",
- &find_best_byrequests,
- NULL
-};
-
-static const proxy_balancer_method bytraffic =
-{
- "bytraffic",
- &find_best_bytraffic,
- NULL
-};
-
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 and after the mod_proxy
+ * initializes
*/
- static const char *const aszPred[] = { "mpm_winnt.c", "mod_proxy.c", NULL};
+ static const char *const aszPred[] = { "mpm_winnt.c", "mod_slotmem_shm.c", NULL};
/* manager handler */
+ ap_hook_post_config(balancer_post_config, NULL, 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(child_init, aszPred, NULL, APR_HOOK_MIDDLE);
+ 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_register_provider(p, PROXY_LBMETHOD, "bytraffic", "0", &bytraffic);
- ap_register_provider(p, PROXY_LBMETHOD, "byrequests", "0", &byrequests);
}
-module AP_MODULE_DECLARE_DATA proxy_balancer_module = {
+AP_DECLARE_MODULE(proxy_balancer) = {
STANDARD20_MODULE_STUFF,
NULL, /* create per-directory config structure */
NULL, /* merge per-directory config structures */
projects / apache / blobdiff