diff options
Diffstat (limited to 'src/rrdhost.c')
| -rw-r--r-- | src/rrdhost.c | 583 |
1 files changed, 583 insertions, 0 deletions
diff --git a/src/rrdhost.c b/src/rrdhost.c new file mode 100644 index 00000000..a2310330 --- /dev/null +++ b/src/rrdhost.c @@ -0,0 +1,583 @@ +#define NETDATA_RRD_INTERNALS 1 +#include "common.h" + +RRDHOST *localhost = NULL; +size_t rrd_hosts_available = 0; +netdata_rwlock_t rrd_rwlock = NETDATA_RWLOCK_INITIALIZER; + +time_t rrdset_free_obsolete_time = 3600; +time_t rrdhost_free_orphan_time = 3600; + +// ---------------------------------------------------------------------------- +// RRDHOST index + +int rrdhost_compare(void* a, void* b) { + if(((RRDHOST *)a)->hash_machine_guid < ((RRDHOST *)b)->hash_machine_guid) return -1; + else if(((RRDHOST *)a)->hash_machine_guid > ((RRDHOST *)b)->hash_machine_guid) return 1; + else return strcmp(((RRDHOST *)a)->machine_guid, ((RRDHOST *)b)->machine_guid); +} + +avl_tree_lock rrdhost_root_index = { + .avl_tree = { NULL, rrdhost_compare }, + .rwlock = AVL_LOCK_INITIALIZER +}; + +RRDHOST *rrdhost_find_by_guid(const char *guid, uint32_t hash) { + debug(D_RRDHOST, "Searching in index for host with guid '%s'", guid); + + RRDHOST tmp; + strncpyz(tmp.machine_guid, guid, GUID_LEN); + tmp.hash_machine_guid = (hash)?hash:simple_hash(tmp.machine_guid); + + return (RRDHOST *)avl_search_lock(&(rrdhost_root_index), (avl *) &tmp); +} + +RRDHOST *rrdhost_find_by_hostname(const char *hostname, uint32_t hash) { + if(unlikely(!strcmp(hostname, "localhost"))) + return localhost; + + if(unlikely(!hash)) hash = simple_hash(hostname); + + rrd_rdlock(); + RRDHOST *host; + rrdhost_foreach_read(host) { + if(unlikely((hash == host->hash_hostname && !strcmp(hostname, host->hostname)))) { + rrd_unlock(); + return host; + } + } + rrd_unlock(); + + return NULL; +} + +#define rrdhost_index_add(rrdhost) (RRDHOST *)avl_insert_lock(&(rrdhost_root_index), (avl *)(rrdhost)) +#define rrdhost_index_del(rrdhost) (RRDHOST *)avl_remove_lock(&(rrdhost_root_index), (avl *)(rrdhost)) + + +// ---------------------------------------------------------------------------- +// RRDHOST - internal helpers + +static inline void rrdhost_init_hostname(RRDHOST *host, const char *hostname) { + freez(host->hostname); + host->hostname = strdupz(hostname); + host->hash_hostname = simple_hash(host->hostname); +} + +static inline void rrdhost_init_os(RRDHOST *host, const char *os) { + freez(host->os); + host->os = strdupz(os?os:"unknown"); +} + +static inline void rrdhost_init_machine_guid(RRDHOST *host, const char *machine_guid) { + strncpy(host->machine_guid, machine_guid, GUID_LEN); + host->machine_guid[GUID_LEN] = '\0'; + host->hash_machine_guid = simple_hash(host->machine_guid); +} + + +// ---------------------------------------------------------------------------- +// RRDHOST - add a host + +RRDHOST *rrdhost_create(const char *hostname, + const char *guid, + const char *os, + int update_every, + long entries, + RRD_MEMORY_MODE memory_mode, + int health_enabled, + int rrdpush_enabled, + char *rrdpush_destination, + char *rrdpush_api_key, + int is_localhost +) { + debug(D_RRDHOST, "Host '%s': adding with guid '%s'", hostname, guid); + + rrd_check_wrlock(); + + RRDHOST *host = callocz(1, sizeof(RRDHOST)); + + host->rrd_update_every = (update_every > 0)?update_every:1; + host->rrd_history_entries = align_entries_to_pagesize(memory_mode, entries); + host->rrd_memory_mode = memory_mode; + host->health_enabled = (memory_mode == RRD_MEMORY_MODE_NONE)? 0 : health_enabled; + host->rrdpush_enabled = (rrdpush_enabled && rrdpush_destination && *rrdpush_destination && rrdpush_api_key && *rrdpush_api_key); + host->rrdpush_destination = (host->rrdpush_enabled)?strdupz(rrdpush_destination):NULL; + host->rrdpush_api_key = (host->rrdpush_enabled)?strdupz(rrdpush_api_key):NULL; + + host->rrdpush_pipe[0] = -1; + host->rrdpush_pipe[1] = -1; + host->rrdpush_socket = -1; + + netdata_mutex_init(&host->rrdpush_mutex); + netdata_rwlock_init(&host->rrdhost_rwlock); + + rrdhost_init_hostname(host, hostname); + rrdhost_init_machine_guid(host, guid); + rrdhost_init_os(host, os); + + avl_init_lock(&(host->rrdset_root_index), rrdset_compare); + avl_init_lock(&(host->rrdset_root_index_name), rrdset_compare_name); + avl_init_lock(&(host->rrdfamily_root_index), rrdfamily_compare); + avl_init_lock(&(host->variables_root_index), rrdvar_compare); + + if(config_get_boolean(CONFIG_SECTION_GLOBAL, "delete obsolete charts files", 1)) + rrdhost_flag_set(host, RRDHOST_DELETE_OBSOLETE_FILES); + + if(config_get_boolean(CONFIG_SECTION_GLOBAL, "delete orphan hosts files", 1) && !is_localhost) + rrdhost_flag_set(host, RRDHOST_DELETE_ORPHAN_FILES); + + + // ------------------------------------------------------------------------ + // initialize health variables + + host->health_log.next_log_id = 1; + host->health_log.next_alarm_id = 1; + host->health_log.max = 1000; + host->health_log.next_log_id = + host->health_log.next_alarm_id = (uint32_t)now_realtime_sec(); + + long n = config_get_number(CONFIG_SECTION_HEALTH, "in memory max health log entries", host->health_log.max); + if(n < 10) { + error("Host '%s': health configuration has invalid max log entries %ld. Using default %u", host->hostname, n, host->health_log.max); + config_set_number(CONFIG_SECTION_HEALTH, "in memory max health log entries", (long)host->health_log.max); + } + else + host->health_log.max = (unsigned int)n; + + netdata_rwlock_init(&host->health_log.alarm_log_rwlock); + + char filename[FILENAME_MAX + 1]; + + if(is_localhost) { + + host->cache_dir = strdupz(netdata_configured_cache_dir); + host->varlib_dir = strdupz(netdata_configured_varlib_dir); + + } + else { + // this is not localhost - append our GUID to localhost path + + 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); + } + + } + + if(host->health_enabled) { + 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); + host->health_default_exec = strdupz(config_get(CONFIG_SECTION_HEALTH, "script to execute on alarm", filename)); + host->health_default_recipient = strdup("root"); + + + // ------------------------------------------------------------------------ + // load health configuration + + if(host->health_enabled) { + health_alarm_log_load(host); + health_alarm_log_open(host); + + rrdhost_wrlock(host); + health_readdir(host, health_config_dir()); + rrdhost_unlock(host); + } + + + // ------------------------------------------------------------------------ + // link it and add it to the index + + if(is_localhost) { + host->next = localhost; + localhost = host; + } + else { + if(localhost) { + host->next = localhost->next; + localhost->next = host; + } + else localhost = host; + } + + RRDHOST *t = rrdhost_index_add(host); + + if(t != host) { + error("Host '%s': cannot add host with machine guid '%s' to index. It already exists as host '%s' with machine guid '%s'.", host->hostname, host->machine_guid, t->hostname, t->machine_guid); + rrdhost_free(host); + host = NULL; + } + else { + info("Host '%s' with guid '%s' initialized" + ", os %s" + ", update every %d" + ", memory mode %s" + ", history entries %ld" + ", streaming %s" + " (to '%s' with api key '%s')" + ", health %s" + ", cache_dir '%s'" + ", varlib_dir '%s'" + ", health_log '%s'" + ", alarms default handler '%s'" + ", alarms default recipient '%s'" + , host->hostname + , host->machine_guid + , host->os + , host->rrd_update_every + , rrd_memory_mode_name(host->rrd_memory_mode) + , host->rrd_history_entries + , host->rrdpush_enabled?"enabled":"disabled" + , host->rrdpush_destination?host->rrdpush_destination:"" + , host->rrdpush_api_key?host->rrdpush_api_key:"" + , host->health_enabled?"enabled":"disabled" + , host->cache_dir + , host->varlib_dir + , host->health_log_filename + , host->health_default_exec + , host->health_default_recipient + ); + } + + rrd_hosts_available++; + + return host; +} + +RRDHOST *rrdhost_find_or_create( + const char *hostname + , const char *guid + , const char *os + , int update_every + , long history + , RRD_MEMORY_MODE mode + , int health_enabled + , int rrdpush_enabled + , char *rrdpush_destination + , char *rrdpush_api_key +) { + debug(D_RRDHOST, "Searching for host '%s' with guid '%s'", hostname, guid); + + rrd_wrlock(); + RRDHOST *host = rrdhost_find_by_guid(guid, 0); + if(!host) { + host = rrdhost_create( + hostname + , guid + , os + , update_every + , history + , mode + , health_enabled + , rrdpush_enabled + , rrdpush_destination + , rrdpush_api_key + , 0 + ); + } + else { + host->health_enabled = health_enabled; + + if(strcmp(host->hostname, hostname)) { + char *t = host->hostname; + host->hostname = strdupz(hostname); + host->hash_hostname = simple_hash(host->hostname); + freez(t); + } + + if(host->rrd_update_every != update_every) + error("Host '%s' has an update frequency of %d seconds, but the wanted one is %d seconds.", host->hostname, host->rrd_update_every, update_every); + + if(host->rrd_history_entries != history) + error("Host '%s' has history of %ld entries, but the wanted one is %ld entries.", host->hostname, host->rrd_history_entries, history); + + if(host->rrd_memory_mode != mode) + error("Host '%s' has memory mode '%s', but the wanted one is '%s'.", host->hostname, rrd_memory_mode_name(host->rrd_memory_mode), rrd_memory_mode_name(mode)); + } + rrd_unlock(); + + rrdhost_cleanup_orphan(host); + + return host; +} + +static inline int rrdhost_should_be_deleted(RRDHOST *host, RRDHOST *protected, time_t now) { + if(host != protected + && host != localhost + && !host->connected_senders + && host->senders_disconnected_time + && host->senders_disconnected_time + rrdhost_free_orphan_time < now) + return 1; + + return 0; +} + +void rrdhost_cleanup_orphan(RRDHOST *protected) { + time_t now = now_realtime_sec(); + + rrd_wrlock(); + + RRDHOST *host; + +restart_after_removal: + rrdhost_foreach_write(host) { + if(rrdhost_should_be_deleted(host, protected, now)) { + info("Host '%s' with machine guid '%s' is obsolete - cleaning up.", host->hostname, host->machine_guid); + + if(rrdset_flag_check(host, RRDHOST_ORPHAN)) + rrdhost_delete(host); + else + rrdhost_save(host); + + rrdhost_free(host); + goto restart_after_removal; + } + } + + rrd_unlock(); +} + +// ---------------------------------------------------------------------------- +// RRDHOST global / startup initialization + +void rrd_init(char *hostname) { + rrdset_free_obsolete_time = config_get_number(CONFIG_SECTION_GLOBAL, "cleanup obsolete charts after seconds", rrdset_free_obsolete_time); + + health_init(); + registry_init(); + rrdpush_init(); + + debug(D_RRDHOST, "Initializing localhost with hostname '%s'", hostname); + rrd_wrlock(); + localhost = rrdhost_create( + hostname + , registry_get_this_machine_guid() + , os_type + , default_rrd_update_every + , default_rrd_history_entries + , default_rrd_memory_mode + , default_health_enabled + , default_rrdpush_enabled + , default_rrdpush_destination + , default_rrdpush_api_key + , 1 + ); + rrd_unlock(); +} + +// ---------------------------------------------------------------------------- +// RRDHOST - lock validations +// there are only used when NETDATA_INTERNAL_CHECKS is set + +void __rrdhost_check_rdlock(RRDHOST *host, const char *file, const char *function, const unsigned long line) { + debug(D_RRDHOST, "Checking read lock on host '%s'", host->hostname); + + int ret = netdata_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_check_wrlock(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 = netdata_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 __rrd_check_rdlock(const char *file, const char *function, const unsigned long line) { + debug(D_RRDHOST, "Checking read lock on all RRDs"); + + int ret = netdata_rwlock_trywrlock(&rrd_rwlock); + if(ret == 0) + fatal("RRDs should be read-locked, but it are not, at function %s() at line %lu of file '%s'", function, line, file); +} + +void __rrd_check_wrlock(const char *file, const char *function, const unsigned long line) { + debug(D_RRDHOST, "Checking write lock on all RRDs"); + + int ret = netdata_rwlock_tryrdlock(&rrd_rwlock); + if(ret == 0) + 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); + + rrd_check_wrlock(); // make sure the RRDs are write locked + + // stop a possibly running thread + rrdpush_sender_thread_stop(host); + + rrdhost_wrlock(host); // lock this RRDHOST + + // ------------------------------------------------------------------------ + // release its children resources + + while(host->rrdset_root) rrdset_free(host->rrdset_root); + + while(host->alarms) rrdcalc_free(host, host->alarms); + while(host->templates) rrdcalctemplate_free(host, host->templates); + health_alarm_log_free(host); + + + // ------------------------------------------------------------------------ + // remove it from the indexes + + if(rrdhost_index_del(host) != host) + error("RRDHOST '%s' removed from index, deleted the wrong entry.", host->hostname); + + + // ------------------------------------------------------------------------ + // unlink it from the host + + if(host == localhost) { + localhost = host->next; + } + 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->os); + freez(host->cache_dir); + freez(host->varlib_dir); + freez(host->rrdpush_api_key); + freez(host->rrdpush_destination); + freez(host->health_default_exec); + freez(host->health_default_recipient); + freez(host->health_log_filename); + freez(host->hostname); + rrdhost_unlock(host); + netdata_rwlock_destroy(&host->health_log.alarm_log_rwlock); + netdata_rwlock_destroy(&host->rrdhost_rwlock); + freez(host); + + rrd_hosts_available--; +} + +void rrdhost_free_all(void) { + rrd_wrlock(); + while(localhost) rrdhost_free(localhost); + rrd_unlock(); +} + +// ---------------------------------------------------------------------------- +// RRDHOST - save + +void rrdhost_save(RRDHOST *host) { + if(!host) return; + + info("Saving database of host '%s'...", host->hostname); + + RRDSET *st; + + // we get a write lock + // to ensure only one thread is saving the database + rrdhost_wrlock(host); + + rrdset_foreach_write(st, host) { + rrdset_rdlock(st); + rrdset_save(st); + rrdset_unlock(st); + } + + rrdhost_unlock(host); +} + +// ---------------------------------------------------------------------------- +// RRDHOST - delete files + +void rrdhost_delete(RRDHOST *host) { + if(!host) return; + + info("Deleting database of host '%s'...", host->hostname); + + RRDSET *st; + + // we get a write lock + // to ensure only one thread is saving the database + rrdhost_wrlock(host); + + rrdset_foreach_write(st, host) { + rrdset_rdlock(st); + rrdset_delete(st); + rrdset_unlock(st); + } + + rrdhost_unlock(host); +} + +void rrdhost_save_all(void) { + info("Saving database [%zu hosts(s)]...", rrd_hosts_available); + + rrd_rdlock(); + + RRDHOST *host; + rrdhost_foreach_read(host) + rrdhost_save(host); + + rrd_unlock(); +} + +void rrdhost_cleanup_obsolete(RRDHOST *host) { + time_t now = now_realtime_sec(); + + RRDSET *st; + +restart_after_removal: + rrdset_foreach_write(st, host) { + if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_OBSOLETE) + && st->last_accessed_time + rrdset_free_obsolete_time < now + && st->last_updated.tv_sec + rrdset_free_obsolete_time < now + && st->last_collected_time.tv_sec + rrdset_free_obsolete_time < now + )) { + + rrdset_rdlock(st); + + if(rrdhost_flag_check(host, RRDHOST_DELETE_OBSOLETE_FILES)) + rrdset_delete(st); + else + rrdset_save(st); + + rrdset_unlock(st); + + rrdset_free(st); + goto restart_after_removal; + } + } +} |