RRDHOST *localhost = NULL;
+pthread_rwlock_t rrd_rwlock = PTHREAD_RWLOCK_INITIALIZER;
+
+
// ----------------------------------------------------------------------------
// RRDHOST index
host->hash_machine_guid = simple_hash(host->machine_guid);
}
+
// ----------------------------------------------------------------------------
// RRDHOST - add a host
-RRDHOST *rrdhost_create(const char *hostname, const char *guid) {
- debug(D_RRDHOST, "Adding host '%s' with guid '%s'", hostname, guid);
+RRDHOST *rrdhost_create(const char *hostname,
+ const char *guid,
+ int update_every,
+ int entries,
+ RRD_MEMORY_MODE memory_mode,
+ int health_enabled) {
+
+ debug(D_RRDHOST, "Host '%s': adding with guid '%s'", hostname, guid);
RRDHOST *host = callocz(1, sizeof(RRDHOST));
- pthread_rwlock_init(&(host->rrdset_root_rwlock), NULL);
+ host->rrd_update_every = update_every;
+ host->rrd_history_entries = entries;
+ host->rrd_memory_mode = memory_mode;
+ host->health_enabled = health_enabled;
+
+ pthread_rwlock_init(&(host->rrdhost_rwlock), NULL);
rrdhost_init_hostname(host, hostname);
rrdhost_init_machine_guid(host, guid);
avl_init_lock(&(host->rrdfamily_root_index), rrdfamily_compare);
avl_init_lock(&(host->variables_root_index), rrdvar_compare);
-
// ------------------------------------------------------------------------
// initialize health variables
long n = config_get_number("health", "in memory max health log entries", host->health_log.max);
if(n < 10) {
- error("Health configuration has invalid max log entries %ld. Using default %u", n, host->health_log.max);
+ error("Host '%s': health configuration has invalid max log entries %ld. Using default %u", host->hostname, n, host->health_log.max);
config_set_number("health", "in memory max health log entries", (long)host->health_log.max);
}
else
if(!localhost) {
// this is localhost
- snprintfz(filename, FILENAME_MAX, "%s/health/health-log.db", netdata_configured_varlib_dir);
+
+ host->cache_dir = strdupz(netdata_configured_cache_dir);
+ host->varlib_dir = strdupz(netdata_configured_varlib_dir);
+
+ snprintfz(filename, FILENAME_MAX, "%s/health/health-log.db", host->varlib_dir);
host->health_log_filename = strdupz(config_get("health", "health db file", filename));
+
}
else {
// this is not localhost - append our GUID to localhost path
- snprintfz(filename, FILENAME_MAX, "%s.%s", localhost->health_log_filename, host->machine_guid);
+
+ snprintfz(filename, FILENAME_MAX, "%s/%s", netdata_configured_cache_dir, host->machine_guid);
+ host->cache_dir = strdupz(filename);
+
+ if(host->rrd_memory_mode == RRD_MEMORY_MODE_MAP || host->rrd_memory_mode == RRD_MEMORY_MODE_SAVE) {
+ int r = mkdir(host->cache_dir, 0775);
+ if(r != 0 && errno != EEXIST)
+ error("Host '%s': cannot create directory '%s'", host->hostname, host->cache_dir);
+ }
+
+ snprintfz(filename, FILENAME_MAX, "%s/%s", netdata_configured_varlib_dir, host->machine_guid);
+ host->varlib_dir = strdupz(filename);
+
+ if(host->health_enabled) {
+ int r = mkdir(host->varlib_dir, 0775);
+ if(r != 0 && errno != EEXIST)
+ error("Host '%s': cannot create directory '%s'", host->hostname, host->varlib_dir);
+ }
+
+ snprintfz(filename, FILENAME_MAX, "%s/health", host->varlib_dir);
+ int r = mkdir(filename, 0775);
+ if(r != 0 && errno != EEXIST)
+ error("Host '%s': cannot create directory '%s'", host->hostname, filename);
+
+ snprintfz(filename, FILENAME_MAX, "%s/health/health-log.db", host->varlib_dir);
host->health_log_filename = strdupz(filename);
+
}
snprintfz(filename, FILENAME_MAX, "%s/alarm-notify.sh", netdata_configured_plugins_dir);
health_alarm_log_load(host);
health_alarm_log_open(host);
- rrdhost_rwlock(host);
+ rrdhost_wrlock(host);
health_readdir(host, health_config_dir());
rrdhost_unlock(host);
// ------------------------------------------------------------------------
- // add it to the index
+ // link it and add it to the index
+
+ rrd_wrlock();
+
+ if(localhost) {
+ host->next = localhost->next;
+ localhost->next = host;
+ }
if(rrdhost_index_add(host) != host)
- fatal("Cannot add host '%s' to index. It already exists.", hostname);
+ fatal("Host '%s': cannot add host to index. It already exists.", hostname);
+
+ rrd_unlock();
- debug(D_RRDHOST, "Added host '%s' with guid '%s'", host->hostname, host->machine_guid);
+ debug(D_RRDHOST, "Host '%s', added with guid '%s'", host->hostname, host->machine_guid);
return host;
}
RRDHOST *host = rrdhost_find(guid, 0);
if(!host)
- host = rrdhost_create(hostname, guid);
+ host = rrdhost_create(hostname,
+ guid,
+ default_rrd_update_every,
+ default_rrd_history_entries,
+ default_rrd_memory_mode,
+ default_health_enabled
+ );
return host;
}
void rrd_init(char *hostname) {
debug(D_RRDHOST, "Initializing localhost with hostname '%s'", hostname);
- localhost = rrdhost_create(hostname, registry_get_this_machine_guid());
+
+ localhost = rrdhost_create(hostname,
+ registry_get_this_machine_guid(),
+ default_rrd_update_every,
+ default_rrd_history_entries,
+ default_rrd_memory_mode,
+ default_health_enabled
+ );
}
// ----------------------------------------------------------------------------
-// RRDHOST - locks
+// RRDHOST - lock validations
+// there are only used when NETDATA_INTERNAL_CHECKS is set
-void rrdhost_rwlock(RRDHOST *host) {
- debug(D_RRDHOST, "Write lock host '%s'", host->hostname);
- pthread_rwlock_wrlock(&host->rrdset_root_rwlock);
-}
+void rrdhost_check_rdlock_int(RRDHOST *host, const char *file, const char *function, const unsigned long line) {
+ debug(D_RRDHOST, "Checking read lock on host '%s'", host->hostname);
-void rrdhost_rdlock(RRDHOST *host) {
- debug(D_RRDHOST, "Read lock host '%s'", host->hostname);
- pthread_rwlock_rdlock(&host->rrdset_root_rwlock);
+ int ret = pthread_rwlock_trywrlock(&host->rrdhost_rwlock);
+ if(ret == 0)
+ fatal("RRDHOST '%s' should be read-locked, but it is not, at function %s() at line %lu of file '%s'", host->hostname, function, line, file);
}
-void rrdhost_unlock(RRDHOST *host) {
- debug(D_RRDHOST, "Unlock host '%s'", host->hostname);
- pthread_rwlock_unlock(&host->rrdset_root_rwlock);
+void rrdhost_check_wrlock_int(RRDHOST *host, const char *file, const char *function, const unsigned long line) {
+ debug(D_RRDHOST, "Checking write lock on host '%s'", host->hostname);
+
+ int ret = pthread_rwlock_tryrdlock(&host->rrdhost_rwlock);
+ if(ret == 0)
+ fatal("RRDHOST '%s' should be write-locked, but it is not, at function %s() at line %lu of file '%s'", host->hostname, function, line, file);
}
-void rrdhost_check_rdlock_int(RRDHOST *host, const char *file, const char *function, const unsigned long line) {
- debug(D_RRDHOST, "Read lock host '%s'", host->hostname);
+void rrd_check_rdlock_int(const char *file, const char *function, const unsigned long line) {
+ debug(D_RRDHOST, "Checking read lock on all RRDs");
- int ret = pthread_rwlock_trywrlock(&host->rrdset_root_rwlock);
+ int ret = pthread_rwlock_trywrlock(&rrd_rwlock);
if(ret == 0)
- fatal("RRDHOST '%s' should be read-locked, but it is not, at function %s() at line %lu of file '%s'", host->hostname, function, line, file);
+ fatal("RRDs should be read-locked, but it are not, at function %s() at line %lu of file '%s'", function, line, file);
}
-void rrdhost_check_wrlock_int(RRDHOST *host, const char *file, const char *function, const unsigned long line) {
- debug(D_RRDHOST, "Write lock host '%s'", host->hostname);
+void rrd_check_wrlock_int(const char *file, const char *function, const unsigned long line) {
+ debug(D_RRDHOST, "Checking write lock on all RRDs");
- int ret = pthread_rwlock_tryrdlock(&host->rrdset_root_rwlock);
+ int ret = pthread_rwlock_tryrdlock(&rrd_rwlock);
if(ret == 0)
- fatal("RRDHOST '%s' should be write-locked, but it is not, at function %s() at line %lu of file '%s'", host->hostname, function, line, file);
+ fatal("RRDs should be write-locked, but it are not, at function %s() at line %lu of file '%s'", function, line, file);
}
+// ----------------------------------------------------------------------------
+// RRDHOST - free
+
void rrdhost_free(RRDHOST *host) {
if(!host) return;
info("Freeing all memory for host '%s'...", host->hostname);
- rrdhost_rwlock(host);
+ rrd_check_wrlock(); // make sure the RRDs are write locked
+ rrdhost_wrlock(host); // lock this RRDHOST
- RRDSET *st;
- for(st = host->rrdset_root; st ;) {
- RRDSET *next = st->next;
+ // ------------------------------------------------------------------------
+ // release its children resources
- pthread_rwlock_wrlock(&st->rwlock);
+ while(host->rrdset_root) rrdset_free(host->rrdset_root);
- while(st->variables) rrdsetvar_free(st->variables);
- while(st->alarms) rrdsetcalc_unlink(st->alarms);
- while(st->dimensions) rrddim_free(st, st->dimensions);
+ while(host->alarms) rrdcalc_free(host, host->alarms);
+ while(host->templates) rrdcalctemplate_free(host, host->templates);
+ health_alarm_log_free(host);
- if(unlikely(rrdset_index_del(host, st) != st))
- error("RRDSET: INTERNAL ERROR: attempt to remove from index chart '%s', removed a different chart.", st->id);
- rrdset_index_del_name(host, st);
+ // ------------------------------------------------------------------------
+ // remove it from the indexes
- st->rrdfamily->use_count--;
- if(!st->rrdfamily->use_count)
- rrdfamily_free(host, st->rrdfamily);
+ if(rrdhost_index_del(host) != host)
+ error("RRDHOST '%s' removed from index, deleted the wrong entry.", host->hostname);
- pthread_rwlock_unlock(&st->rwlock);
- if(st->mapped == RRD_MEMORY_MODE_SAVE || st->mapped == RRD_MEMORY_MODE_MAP) {
- debug(D_RRD_CALLS, "Unmapping stats '%s'.", st->name);
- munmap(st, st->memsize);
- }
- else
- freez(st);
+ // ------------------------------------------------------------------------
+ // unlink it from the host
- st = next;
+ if(host == localhost) {
+ localhost = host->next;
}
- host->rrdset_root = NULL;
+ else {
+ // find the previous one
+ RRDHOST *h;
+ for(h = localhost; h && h->next != host ; h = h->next) ;
+
+ // bypass it
+ if(h) h->next = host->next;
+ else error("Request to free RRDHOST '%s': cannot find it", host->hostname);
+ }
+
+ // ------------------------------------------------------------------------
+ // free it
+ freez(host->cache_dir);
+ freez(host->varlib_dir);
freez(host->health_default_exec);
freez(host->health_default_recipient);
freez(host->health_log_filename);
info("Host memory cleanup completed...");
}
+void rrdhost_free_all(void) {
+ rrd_wrlock();
+ while(localhost) rrdhost_free(localhost);
+ rrd_unlock();
+}
+
+// ----------------------------------------------------------------------------
+// RRDHOST - save
+
void rrdhost_save(RRDHOST *host) {
if(!host) return;
RRDSET *st;
RRDDIM *rd;
- // we get an write lock
+ // we get a write lock
// to ensure only one thread is saving the database
- rrdhost_rwlock(host);
+ rrdhost_wrlock(host);
- for(st = host->rrdset_root; st ; st = st->next) {
- pthread_rwlock_rdlock(&st->rwlock);
+ rrdset_foreach_write(st, host) {
+ rrdset_rdlock(st);
- if(st->mapped == RRD_MEMORY_MODE_SAVE) {
- debug(D_RRD_CALLS, "Saving stats '%s' to '%s'.", st->name, st->cache_filename);
+ if(st->rrd_memory_mode == RRD_MEMORY_MODE_SAVE) {
+ debug(D_RRD_STATS, "Saving stats '%s' to '%s'.", st->name, st->cache_filename);
savememory(st->cache_filename, st, st->memsize);
}
- for(rd = st->dimensions; rd ; rd = rd->next) {
- if(likely(rd->memory_mode == RRD_MEMORY_MODE_SAVE)) {
- debug(D_RRD_CALLS, "Saving dimension '%s' to '%s'.", rd->name, rd->cache_filename);
+ rrddim_foreach_read(rd, st) {
+ if(likely(rd->rrd_memory_mode == RRD_MEMORY_MODE_SAVE)) {
+ debug(D_RRD_STATS, "Saving dimension '%s' to '%s'.", rd->name, rd->cache_filename);
savememory(rd->cache_filename, rd, rd->memsize);
}
}
- pthread_rwlock_unlock(&st->rwlock);
+ rrdset_unlock(st);
}
rrdhost_unlock(host);
}
-void rrdhost_free_all(void) {
- RRDHOST *host = localhost;
-
- // FIXME: lock all hosts
-
- while(host) {
- RRDHOST *next = host = host->next;
- rrdhost_free(host);
- host = next;
- }
+void rrdhost_save_all(void) {
+ info("Saving database...");
- localhost = NULL;
+ rrd_rdlock();
- // FIXME: unlock all hosts
-}
-
-void rrdhost_save_all(void) {
RRDHOST *host;
- for(host = localhost; host ; host = host->next)
+ rrdhost_foreach_read(host)
rrdhost_save(host);
+
+ rrd_unlock();
}
projects / netdata.git / blobdiff