// SPDX-License-Identifier: GPL-3.0-or-later #include "health.h" #define WORKER_HEALTH_JOB_RRD_LOCK 0 #define WORKER_HEALTH_JOB_HOST_LOCK 1 #define WORKER_HEALTH_JOB_DB_QUERY 2 #define WORKER_HEALTH_JOB_CALC_EVAL 3 #define WORKER_HEALTH_JOB_WARNING_EVAL 4 #define WORKER_HEALTH_JOB_CRITICAL_EVAL 5 #define WORKER_HEALTH_JOB_ALARM_LOG_ENTRY 6 #define WORKER_HEALTH_JOB_ALARM_LOG_PROCESS 7 #define WORKER_HEALTH_JOB_DELAYED_INIT_RRDSET 8 #define WORKER_HEALTH_JOB_DELAYED_INIT_RRDDIM 9 #if WORKER_UTILIZATION_MAX_JOB_TYPES < 10 #error WORKER_UTILIZATION_MAX_JOB_TYPES has to be at least 10 #endif static bool prepare_command(BUFFER *wb, const char *exec, const char *recipient, const char *registry_hostname, uint32_t unique_id, uint32_t alarm_id, uint32_t alarm_event_id, uint32_t when, const char *alert_name, const char *alert_chart_name, const char *alert_family, const char *new_status, const char *old_status, NETDATA_DOUBLE new_value, NETDATA_DOUBLE old_value, const char *alert_source, uint32_t duration, uint32_t non_clear_duration, const char *alert_units, const char *alert_info, const char *new_value_string, const char *old_value_string, const char *source, const char *error_msg, int n_warn, int n_crit, const char *warn_alarms, const char *crit_alarms, const char *classification, const char *edit_command, const char *machine_guid) { char buf[8192]; size_t n = 8192 - 1; buffer_strcat(wb, "exec"); if (!sanitize_command_argument_string(buf, exec, n)) return false; buffer_sprintf(wb, " '%s'", buf); if (!sanitize_command_argument_string(buf, recipient, n)) return false; buffer_sprintf(wb, " '%s'", buf); if (!sanitize_command_argument_string(buf, registry_hostname, n)) return false; buffer_sprintf(wb, " '%s'", buf); buffer_sprintf(wb, " '%u'", unique_id); buffer_sprintf(wb, " '%u'", alarm_id); buffer_sprintf(wb, " '%u'", alarm_event_id); buffer_sprintf(wb, " '%u'", when); if (!sanitize_command_argument_string(buf, alert_name, n)) return false; buffer_sprintf(wb, " '%s'", buf); if (!sanitize_command_argument_string(buf, alert_chart_name, n)) return false; buffer_sprintf(wb, " '%s'", buf); if (!sanitize_command_argument_string(buf, alert_family, n)) return false; buffer_sprintf(wb, " '%s'", buf); if (!sanitize_command_argument_string(buf, new_status, n)) return false; buffer_sprintf(wb, " '%s'", buf); if (!sanitize_command_argument_string(buf, old_status, n)) return false; buffer_sprintf(wb, " '%s'", buf); buffer_sprintf(wb, " '" NETDATA_DOUBLE_FORMAT_ZERO "'", new_value); buffer_sprintf(wb, " '" NETDATA_DOUBLE_FORMAT_ZERO "'", old_value); if (!sanitize_command_argument_string(buf, alert_source, n)) return false; buffer_sprintf(wb, " '%s'", buf); buffer_sprintf(wb, " '%u'", duration); buffer_sprintf(wb, " '%u'", non_clear_duration); if (!sanitize_command_argument_string(buf, alert_units, n)) return false; buffer_sprintf(wb, " '%s'", buf); if (!sanitize_command_argument_string(buf, alert_info, n)) return false; buffer_sprintf(wb, " '%s'", buf); if (!sanitize_command_argument_string(buf, new_value_string, n)) return false; buffer_sprintf(wb, " '%s'", buf); if (!sanitize_command_argument_string(buf, old_value_string, n)) return false; buffer_sprintf(wb, " '%s'", buf); if (!sanitize_command_argument_string(buf, source, n)) return false; buffer_sprintf(wb, " '%s'", buf); if (!sanitize_command_argument_string(buf, error_msg, n)) return false; buffer_sprintf(wb, " '%s'", buf); buffer_sprintf(wb, " '%d'", n_warn); buffer_sprintf(wb, " '%d'", n_crit); if (!sanitize_command_argument_string(buf, warn_alarms, n)) return false; buffer_sprintf(wb, " '%s'", buf); if (!sanitize_command_argument_string(buf, crit_alarms, n)) return false; buffer_sprintf(wb, " '%s'", buf); if (!sanitize_command_argument_string(buf, classification, n)) return false; buffer_sprintf(wb, " '%s'", buf); if (!sanitize_command_argument_string(buf, edit_command, n)) return false; buffer_sprintf(wb, " '%s'", buf); if (!sanitize_command_argument_string(buf, machine_guid, n)) return false; buffer_sprintf(wb, " '%s'", buf); return true; } unsigned int default_health_enabled = 1; char *silencers_filename; // the queue of executed alarm notifications that haven't been waited for yet static __thread struct { ALARM_ENTRY *head; // oldest ALARM_ENTRY *tail; // latest } alarm_notifications_in_progress = {NULL, NULL}; typedef struct active_alerts { char *name; time_t last_status_change; RRDCALC_STATUS status; } active_alerts_t; static inline void enqueue_alarm_notify_in_progress(ALARM_ENTRY *ae) { ae->prev_in_progress = NULL; ae->next_in_progress = NULL; if (NULL != alarm_notifications_in_progress.tail) { ae->prev_in_progress = alarm_notifications_in_progress.tail; alarm_notifications_in_progress.tail->next_in_progress = ae; } if (NULL == alarm_notifications_in_progress.head) { alarm_notifications_in_progress.head = ae; } alarm_notifications_in_progress.tail = ae; } static inline void unlink_alarm_notify_in_progress(ALARM_ENTRY *ae) { struct alarm_entry *prev = ae->prev_in_progress; struct alarm_entry *next = ae->next_in_progress; if (NULL != prev) { prev->next_in_progress = next; } if (NULL != next) { next->prev_in_progress = prev; } if (ae == alarm_notifications_in_progress.head) { alarm_notifications_in_progress.head = next; } if (ae == alarm_notifications_in_progress.tail) { alarm_notifications_in_progress.tail = prev; } } // ---------------------------------------------------------------------------- // health initialization /** * User Config directory * * Get the config directory for health and return it. * * @return a pointer to the user config directory */ inline char *health_user_config_dir(void) { char buffer[FILENAME_MAX + 1]; snprintfz(buffer, FILENAME_MAX, "%s/health.d", netdata_configured_user_config_dir); return config_get(CONFIG_SECTION_DIRECTORIES, "health config", buffer); } /** * Stock Config Directory * * Get the Stock config directory and return it. * * @return a pointer to the stock config directory. */ inline char *health_stock_config_dir(void) { char buffer[FILENAME_MAX + 1]; snprintfz(buffer, FILENAME_MAX, "%s/health.d", netdata_configured_stock_config_dir); return config_get(CONFIG_SECTION_DIRECTORIES, "stock health config", buffer); } /** * Silencers init * * Function used to initialize the silencer structure. */ static void health_silencers_init(void) { FILE *fd = fopen(silencers_filename, "r"); if (fd) { fseek(fd, 0 , SEEK_END); off_t length = (off_t) ftell(fd); fseek(fd, 0 , SEEK_SET); if (length > 0 && length < HEALTH_SILENCERS_MAX_FILE_LEN) { char *str = mallocz((length+1)* sizeof(char)); if(str) { size_t copied; copied = fread(str, sizeof(char), length, fd); if (copied == (length* sizeof(char))) { str[length] = 0x00; json_parse(str, NULL, health_silencers_json_read_callback); info("Parsed health silencers file %s", silencers_filename); } else { error("Cannot read the data from health silencers file %s", silencers_filename); } freez(str); } } else { error( "Health silencers file %s has the size %" PRId64 " that is out of range[ 1 , %d ]. Aborting read.", silencers_filename, (int64_t)length, HEALTH_SILENCERS_MAX_FILE_LEN); } fclose(fd); } else { info("Cannot open the file %s, so Netdata will work with the default health configuration.",silencers_filename); } } /** * Health Init * * Initialize the health thread. */ void health_init(void) { debug(D_HEALTH, "Health configuration initializing"); if(!(default_health_enabled = (unsigned int)config_get_boolean(CONFIG_SECTION_HEALTH, "enabled", default_health_enabled))) { debug(D_HEALTH, "Health is disabled."); return; } health_silencers_init(); } // ---------------------------------------------------------------------------- // re-load health configuration /** * Reload host * * Reload configuration for a specific host. * * @param host the structure of the host that the function will reload the configuration. */ static void health_reload_host(RRDHOST *host) { if(unlikely(!host->health_enabled) && !rrdhost_flag_check(host, RRDHOST_FLAG_INITIALIZED_HEALTH)) return; log_health("[%s]: Reloading health.", rrdhost_hostname(host)); char *user_path = health_user_config_dir(); char *stock_path = health_stock_config_dir(); // free all running alarms rrdcalc_delete_all(host); rrdcalctemplate_delete_all(host); // invalidate all previous entries in the alarm log netdata_rwlock_rdlock(&host->health_log.alarm_log_rwlock); ALARM_ENTRY *t; for(t = host->health_log.alarms ; t ; t = t->next) { if(t->new_status != RRDCALC_STATUS_REMOVED) t->flags |= HEALTH_ENTRY_FLAG_UPDATED; } netdata_rwlock_unlock(&host->health_log.alarm_log_rwlock); // reset all thresholds to all charts RRDSET *st; rrdset_foreach_read(st, host) { st->green = NAN; st->red = NAN; } rrdset_foreach_done(st); // load the new alarms health_readdir(host, user_path, stock_path, NULL); //Discard alarms with labels that do not apply to host rrdcalc_delete_alerts_not_matching_host_labels_from_this_host(host); // link the loaded alarms to their charts rrdset_foreach_write(st, host) { if (rrdset_flag_check(st, RRDSET_FLAG_ARCHIVED)) continue; rrdcalc_link_matching_alerts_to_rrdset(st); rrdcalctemplate_link_matching_templates_to_rrdset(st); } rrdset_foreach_done(st); host->aclk_alert_reloaded = 1; } /** * Reload * * Reload the host configuration for all hosts. */ void health_reload(void) { sql_refresh_hashes(); rrd_rdlock(); RRDHOST *host; rrdhost_foreach_read(host) health_reload_host(host); rrd_unlock(); } // ---------------------------------------------------------------------------- // health main thread and friends static inline RRDCALC_STATUS rrdcalc_value2status(NETDATA_DOUBLE n) { if(isnan(n) || isinf(n)) return RRDCALC_STATUS_UNDEFINED; if(n) return RRDCALC_STATUS_RAISED; return RRDCALC_STATUS_CLEAR; } #define ACTIVE_ALARMS_LIST_EXAMINE 500 #define ACTIVE_ALARMS_LIST 15 static inline int compare_active_alerts(const void * a, const void * b) { active_alerts_t *active_alerts_a = (active_alerts_t *)a; active_alerts_t *active_alerts_b = (active_alerts_t *)b; return ( active_alerts_b->last_status_change - active_alerts_a->last_status_change ); } static inline void health_alarm_execute(RRDHOST *host, ALARM_ENTRY *ae) { ae->flags |= HEALTH_ENTRY_FLAG_PROCESSED; if(unlikely(ae->new_status < RRDCALC_STATUS_CLEAR)) { // do not send notifications for internal statuses debug(D_HEALTH, "Health not sending notification for alarm '%s.%s' status %s (internal statuses)", ae_chart_name(ae), ae_name(ae), rrdcalc_status2string(ae->new_status)); goto done; } if(unlikely(ae->new_status <= RRDCALC_STATUS_CLEAR && (ae->flags & HEALTH_ENTRY_FLAG_NO_CLEAR_NOTIFICATION))) { // do not send notifications for disabled statuses debug(D_HEALTH, "Health not sending notification for alarm '%s.%s' status %s (it has no-clear-notification enabled)", ae_chart_name(ae), ae_name(ae), rrdcalc_status2string(ae->new_status)); log_health("[%s]: Health not sending notification for alarm '%s.%s' status %s (it has no-clear-notification enabled)", rrdhost_hostname(host), ae_chart_name(ae), ae_name(ae), rrdcalc_status2string(ae->new_status)); // mark it as run, so that we will send the same alarm if it happens again goto done; } // find the previous notification for the same alarm // which we have run the exec script // exception: alarms with HEALTH_ENTRY_FLAG_NO_CLEAR_NOTIFICATION set if(likely(!(ae->flags & HEALTH_ENTRY_FLAG_NO_CLEAR_NOTIFICATION))) { uint32_t id = ae->alarm_id; ALARM_ENTRY *t; for(t = ae->next; t ; t = t->next) { if(t->alarm_id == id && t->flags & HEALTH_ENTRY_FLAG_EXEC_RUN) break; } if(likely(t)) { // we have executed this alarm notification in the past if(t && t->new_status == ae->new_status) { // don't send the notification for the same status again debug(D_HEALTH, "Health not sending again notification for alarm '%s.%s' status %s", ae_chart_name(ae), ae_name(ae) , rrdcalc_status2string(ae->new_status)); log_health("[%s]: Health not sending again notification for alarm '%s.%s' status %s", rrdhost_hostname(host), ae_chart_name(ae), ae_name(ae) , rrdcalc_status2string(ae->new_status)); goto done; } } else { // we have not executed this alarm notification in the past // so, don't send CLEAR notifications if(unlikely(ae->new_status == RRDCALC_STATUS_CLEAR)) { if((!(ae->flags & HEALTH_ENTRY_RUN_ONCE)) || (ae->flags & HEALTH_ENTRY_RUN_ONCE && ae->old_status < RRDCALC_STATUS_RAISED) ) { debug(D_HEALTH, "Health not sending notification for first initialization of alarm '%s.%s' status %s" , ae_chart_name(ae), ae_name(ae), rrdcalc_status2string(ae->new_status)); goto done; } } } } // Check if alarm notifications are silenced if (ae->flags & HEALTH_ENTRY_FLAG_SILENCED) { log_health("[%s]: Health not sending notification for alarm '%s.%s' status %s (command API has disabled notifications)", rrdhost_hostname(host), ae_chart_name(ae), ae_name(ae), rrdcalc_status2string(ae->new_status)); goto done; } log_health("[%s]: Sending notification for alarm '%s.%s' status %s.", rrdhost_hostname(host), ae_chart_name(ae), ae_name(ae), rrdcalc_status2string(ae->new_status)); const char *exec = (ae->exec) ? ae_exec(ae) : string2str(host->health_default_exec); const char *recipient = (ae->recipient) ? ae_recipient(ae) : string2str(host->health_default_recipient); int n_warn=0, n_crit=0; RRDCALC *rc; EVAL_EXPRESSION *expr=NULL; BUFFER *warn_alarms, *crit_alarms; active_alerts_t *active_alerts = callocz(ACTIVE_ALARMS_LIST_EXAMINE, sizeof(active_alerts_t)); warn_alarms = buffer_create(NETDATA_WEB_RESPONSE_INITIAL_SIZE); crit_alarms = buffer_create(NETDATA_WEB_RESPONSE_INITIAL_SIZE); foreach_rrdcalc_in_rrdhost_read(host, rc) { if(unlikely(!rc->rrdset || !rc->rrdset->last_collected_time.tv_sec)) continue; if(unlikely((n_warn + n_crit) >= ACTIVE_ALARMS_LIST_EXAMINE)) break; if (unlikely(rc->status == RRDCALC_STATUS_WARNING)) { if (likely(ae->alarm_id != rc->id) || likely(ae->alarm_event_id != rc->next_event_id - 1)) { active_alerts[n_warn+n_crit].name = (char *)rrdcalc_name(rc); active_alerts[n_warn+n_crit].last_status_change = rc->last_status_change; active_alerts[n_warn+n_crit].status = rc->status; n_warn++; } else if (ae->alarm_id == rc->id) expr = rc->warning; } else if (unlikely(rc->status == RRDCALC_STATUS_CRITICAL)) { if (likely(ae->alarm_id != rc->id) || likely(ae->alarm_event_id != rc->next_event_id - 1)) { active_alerts[n_warn+n_crit].name = (char *)rrdcalc_name(rc); active_alerts[n_warn+n_crit].last_status_change = rc->last_status_change; active_alerts[n_warn+n_crit].status = rc->status; n_crit++; } else if (ae->alarm_id == rc->id) expr = rc->critical; } else if (unlikely(rc->status == RRDCALC_STATUS_CLEAR)) { if (ae->alarm_id == rc->id) expr = rc->warning; } } foreach_rrdcalc_in_rrdhost_done(rc); if (n_warn+n_crit>1) qsort (active_alerts, n_warn+n_crit, sizeof(active_alerts_t), compare_active_alerts); int count_w = 0, count_c = 0; while (count_w + count_c < n_warn + n_crit && count_w + count_c < ACTIVE_ALARMS_LIST) { if (active_alerts[count_w+count_c].status == RRDCALC_STATUS_WARNING) { if (count_w) buffer_strcat(warn_alarms, ","); buffer_strcat(warn_alarms, active_alerts[count_w+count_c].name); buffer_strcat(warn_alarms, "="); buffer_snprintf(warn_alarms, 11, "%"PRId64"", (int64_t)active_alerts[count_w+count_c].last_status_change); count_w++; } else if (active_alerts[count_w+count_c].status == RRDCALC_STATUS_CRITICAL) { if (count_c) buffer_strcat(crit_alarms, ","); buffer_strcat(crit_alarms, active_alerts[count_w+count_c].name); buffer_strcat(crit_alarms, "="); buffer_snprintf(crit_alarms, 11, "%"PRId64"", (int64_t)active_alerts[count_w+count_c].last_status_change); count_c++; } } char *edit_command = ae->source ? health_edit_command_from_source(ae_source(ae)) : strdupz("UNKNOWN=0=UNKNOWN"); BUFFER *wb = buffer_create(8192); bool ok = prepare_command(wb, exec, recipient, rrdhost_registry_hostname(host), ae->unique_id, ae->alarm_id, ae->alarm_event_id, (unsigned long)ae->when, ae_name(ae), ae->chart?ae_chart_name(ae):"NOCHART", ae->family?ae_family(ae):"NOFAMILY", rrdcalc_status2string(ae->new_status), rrdcalc_status2string(ae->old_status), ae->new_value, ae->old_value, ae->source?ae_source(ae):"UNKNOWN", (uint32_t)ae->duration, (uint32_t)ae->non_clear_duration, ae_units(ae), ae_info(ae), ae_new_value_string(ae), ae_old_value_string(ae), (expr && expr->source)?expr->source:"NOSOURCE", (expr && expr->error_msg)?buffer_tostring(expr->error_msg):"NOERRMSG", n_warn, n_crit, buffer_tostring(warn_alarms), buffer_tostring(crit_alarms), ae->classification?ae_classification(ae):"Unknown", edit_command, host != localhost ? host->machine_guid:""); const char *command_to_run = buffer_tostring(wb); if (ok) { ae->flags |= HEALTH_ENTRY_FLAG_EXEC_RUN; ae->exec_run_timestamp = now_realtime_sec(); /* will be updated by real time after spawning */ debug(D_HEALTH, "executing command '%s'", command_to_run); ae->flags |= HEALTH_ENTRY_FLAG_EXEC_IN_PROGRESS; ae->exec_spawn_serial = spawn_enq_cmd(command_to_run); enqueue_alarm_notify_in_progress(ae); } else { error("Failed to format command arguments"); } buffer_free(wb); freez(edit_command); buffer_free(warn_alarms); buffer_free(crit_alarms); freez(active_alerts); return; //health_alarm_wait_for_execution done: health_alarm_log_save(host, ae); } static inline void health_alarm_wait_for_execution(ALARM_ENTRY *ae) { if (!(ae->flags & HEALTH_ENTRY_FLAG_EXEC_IN_PROGRESS)) return; spawn_wait_cmd(ae->exec_spawn_serial, &ae->exec_code, &ae->exec_run_timestamp); debug(D_HEALTH, "done executing command - returned with code %d", ae->exec_code); ae->flags &= ~HEALTH_ENTRY_FLAG_EXEC_IN_PROGRESS; if(ae->exec_code != 0) ae->flags |= HEALTH_ENTRY_FLAG_EXEC_FAILED; unlink_alarm_notify_in_progress(ae); } static inline void health_process_notifications(RRDHOST *host, ALARM_ENTRY *ae) { debug(D_HEALTH, "Health alarm '%s.%s' = " NETDATA_DOUBLE_FORMAT_AUTO " - changed status from %s to %s", ae->chart?ae_chart_name(ae):"NOCHART", ae_name(ae), ae->new_value, rrdcalc_status2string(ae->old_status), rrdcalc_status2string(ae->new_status) ); health_alarm_execute(host, ae); } static inline void health_alarm_log_process(RRDHOST *host) { uint32_t first_waiting = (host->health_log.alarms)?host->health_log.alarms->unique_id:0; time_t now = now_realtime_sec(); netdata_rwlock_rdlock(&host->health_log.alarm_log_rwlock); ALARM_ENTRY *ae; for(ae = host->health_log.alarms; ae && ae->unique_id >= host->health_last_processed_id; ae = ae->next) { if(likely(!(ae->flags & HEALTH_ENTRY_FLAG_IS_REPEATING))) { if(unlikely( !(ae->flags & HEALTH_ENTRY_FLAG_PROCESSED) && !(ae->flags & HEALTH_ENTRY_FLAG_UPDATED) )) { if(unlikely(ae->unique_id < first_waiting)) first_waiting = ae->unique_id; if(likely(now >= ae->delay_up_to_timestamp)) health_process_notifications(host, ae); } } } netdata_rwlock_unlock(&host->health_log.alarm_log_rwlock); // remember this for the next iteration host->health_last_processed_id = first_waiting; bool cleanup_excess_log_entries = host->health_log.count > host->health_log.max; if (!cleanup_excess_log_entries) return; // cleanup excess entries in the log netdata_rwlock_wrlock(&host->health_log.alarm_log_rwlock); ALARM_ENTRY *last = NULL; unsigned int count = host->health_log.max * 2 / 3; for(ae = host->health_log.alarms; ae && count ; count--, last = ae, ae = ae->next) ; if(ae && last && last->next == ae) last->next = NULL; else ae = NULL; while(ae) { debug(D_HEALTH, "Health removing alarm log entry with id: %u", ae->unique_id); ALARM_ENTRY *t = ae->next; if(likely(!(ae->flags & HEALTH_ENTRY_FLAG_IS_REPEATING))) { health_alarm_wait_for_execution(ae); health_alarm_log_free_one_nochecks_nounlink(ae); host->health_log.count--; } ae = t; } netdata_rwlock_unlock(&host->health_log.alarm_log_rwlock); } static inline int rrdcalc_isrunnable(RRDCALC *rc, time_t now, time_t *next_run) { if(unlikely(!rc->rrdset)) { debug(D_HEALTH, "Health not running alarm '%s.%s'. It is not linked to a chart.", rrdcalc_chart_name(rc), rrdcalc_name(rc)); return 0; } if(unlikely(rc->next_update > now)) { if (unlikely(*next_run > rc->next_update)) { // update the next_run time of the main loop // to run this alarm precisely the time required *next_run = rc->next_update; } debug(D_HEALTH, "Health not examining alarm '%s.%s' yet (will do in %d secs).", rrdcalc_chart_name(rc), rrdcalc_name(rc), (int) (rc->next_update - now)); return 0; } if(unlikely(!rc->update_every)) { debug(D_HEALTH, "Health not running alarm '%s.%s'. It does not have an update frequency", rrdcalc_chart_name(rc), rrdcalc_name(rc)); return 0; } if(unlikely(rrdset_flag_check(rc->rrdset, RRDSET_FLAG_OBSOLETE))) { debug(D_HEALTH, "Health not running alarm '%s.%s'. The chart has been marked as obsolete", rrdcalc_chart_name(rc), rrdcalc_name(rc)); return 0; } if(unlikely(rrdset_flag_check(rc->rrdset, RRDSET_FLAG_ARCHIVED))) { debug(D_HEALTH, "Health not running alarm '%s.%s'. The chart has been marked as archived", rrdcalc_chart_name(rc), rrdcalc_name(rc)); return 0; } if(unlikely(!rc->rrdset->last_collected_time.tv_sec || rc->rrdset->counter_done < 2)) { debug(D_HEALTH, "Health not running alarm '%s.%s'. Chart is not fully collected yet.", rrdcalc_chart_name(rc), rrdcalc_name(rc)); return 0; } int update_every = rc->rrdset->update_every; time_t first = rrdset_first_entry_t(rc->rrdset); time_t last = rrdset_last_entry_t(rc->rrdset); if(unlikely(now + update_every < first /* || now - update_every > last */)) { debug(D_HEALTH , "Health not examining alarm '%s.%s' yet (wanted time is out of bounds - we need %lu but got %lu - %lu)." , rrdcalc_chart_name(rc), rrdcalc_name(rc), (unsigned long) now, (unsigned long) first , (unsigned long) last); return 0; } if(RRDCALC_HAS_DB_LOOKUP(rc)) { time_t needed = now + rc->before + rc->after; if(needed + update_every < first || needed - update_every > last) { debug(D_HEALTH , "Health not examining alarm '%s.%s' yet (not enough data yet - we need %lu but got %lu - %lu)." , rrdcalc_chart_name(rc), rrdcalc_name(rc), (unsigned long) needed, (unsigned long) first , (unsigned long) last); return 0; } } return 1; } static inline int check_if_resumed_from_suspension(void) { static __thread usec_t last_realtime = 0, last_monotonic = 0; usec_t realtime = now_realtime_usec(), monotonic = now_monotonic_usec(); int ret = 0; // detect if monotonic and realtime have twice the difference // in which case we assume the system was just waken from hibernation if(last_realtime && last_monotonic && realtime - last_realtime > 2 * (monotonic - last_monotonic)) ret = 1; last_realtime = realtime; last_monotonic = monotonic; return ret; } static void health_thread_cleanup(void *ptr) { worker_unregister(); struct health_state *h = ptr; h->host->health_spawn = 0; netdata_thread_cancel(netdata_thread_self()); log_health("[%s]: Health thread ended.", rrdhost_hostname(h->host)); debug(D_HEALTH, "HEALTH %s: Health thread ended.", rrdhost_hostname(h->host)); } static void initialize_health(RRDHOST *host, int is_localhost) { if(!host->health_enabled || rrdhost_flag_check(host, RRDHOST_FLAG_INITIALIZED_HEALTH)) return; rrdhost_flag_set(host, RRDHOST_FLAG_INITIALIZED_HEALTH); log_health("[%s]: Initializing health.", rrdhost_hostname(host)); host->health_default_warn_repeat_every = config_get_duration(CONFIG_SECTION_HEALTH, "default repeat warning", "never"); host->health_default_crit_repeat_every = config_get_duration(CONFIG_SECTION_HEALTH, "default repeat critical", "never"); 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 = (uint32_t)now_realtime_sec(); host->health_log.next_alarm_id = 0; 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", rrdhost_hostname(host), 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) { int r = mkdir(host->varlib_dir, 0775); if (r != 0 && errno != EEXIST) error("Host '%s': cannot create directory '%s'", rrdhost_hostname(host), 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'", rrdhost_hostname(host), 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_primary_plugins_dir); host->health_default_exec = string_strdupz(config_get(CONFIG_SECTION_HEALTH, "script to execute on alarm", filename)); host->health_default_recipient = string_strdupz("root"); if (!file_is_migrated(host->health_log_filename)) { int rc = sql_create_health_log_table(host); if (unlikely(rc)) { log_health("[%s]: Failed to create health log table in the database", rrdhost_hostname(host)); health_alarm_log_load(host); health_alarm_log_open(host); } else { health_alarm_log_load(host); add_migrated_file(host->health_log_filename, 0); } } else { // TODO: This needs to go to the metadata thread // Health should wait before accessing the table (needs to be created by the metadata thread) sql_create_health_log_table(host); sql_health_alarm_log_load(host); } // ------------------------------------------------------------------------ // load health configuration health_readdir(host, health_user_config_dir(), health_stock_config_dir(), NULL); // link the loaded alarms to their charts RRDSET *st; rrdset_foreach_write(st, host) { if (rrdset_flag_check(st, RRDSET_FLAG_ARCHIVED)) continue; rrdcalc_link_matching_alerts_to_rrdset(st); rrdcalctemplate_link_matching_templates_to_rrdset(st); } rrdset_foreach_done(st); //Discard alarms with labels that do not apply to host rrdcalc_delete_alerts_not_matching_host_labels_from_this_host(host); health_silencers_init(); } static void health_sleep(time_t next_run, unsigned int loop __maybe_unused, RRDHOST *host) { time_t now = now_realtime_sec(); if(now < next_run) { worker_is_idle(); debug(D_HEALTH, "Health monitoring iteration no %u done. Next iteration in %d secs", loop, (int) (next_run - now)); while (now < next_run && host->health_enabled && !netdata_exit) { sleep_usec(USEC_PER_SEC); now = now_realtime_sec(); } } else { debug(D_HEALTH, "Health monitoring iteration no %u done. Next iteration now", loop); } } static SILENCE_TYPE check_silenced(RRDCALC *rc, const char *host, SILENCERS *silencers) { SILENCER *s; debug(D_HEALTH, "Checking if alarm was silenced via the command API. Alarm info name:%s context:%s chart:%s host:%s family:%s", rrdcalc_name(rc), (rc->rrdset)?rrdset_context(rc->rrdset):"", rrdcalc_chart_name(rc), host, (rc->rrdset)?rrdset_family(rc->rrdset):""); for (s = silencers->silencers; s!=NULL; s=s->next){ if ( (!s->alarms_pattern || (rc->name && s->alarms_pattern && simple_pattern_matches(s->alarms_pattern, rrdcalc_name(rc)))) && (!s->contexts_pattern || (rc->rrdset && rc->rrdset->context && s->contexts_pattern && simple_pattern_matches(s->contexts_pattern, rrdset_context(rc->rrdset)))) && (!s->hosts_pattern || (host && s->hosts_pattern && simple_pattern_matches(s->hosts_pattern,host))) && (!s->charts_pattern || (rc->chart && s->charts_pattern && simple_pattern_matches(s->charts_pattern, rrdcalc_chart_name(rc)))) && (!s->families_pattern || (rc->rrdset && rc->rrdset->family && s->families_pattern && simple_pattern_matches(s->families_pattern, rrdset_family(rc->rrdset)))) ) { debug(D_HEALTH, "Alarm matches command API silence entry %s:%s:%s:%s:%s", s->alarms,s->charts, s->contexts, s->hosts, s->families); if (unlikely(silencers->stype == STYPE_NONE)) { debug(D_HEALTH, "Alarm %s matched a silence entry, but no SILENCE or DISABLE command was issued via the command API. The match has no effect.", rrdcalc_name(rc)); } else { debug(D_HEALTH, "Alarm %s via the command API - name:%s context:%s chart:%s host:%s family:%s" , (silencers->stype == STYPE_DISABLE_ALARMS)?"Disabled":"Silenced" , rrdcalc_name(rc) , (rc->rrdset)?rrdset_context(rc->rrdset):"" , rrdcalc_chart_name(rc) , host , (rc->rrdset)?rrdset_family(rc->rrdset):"" ); } return silencers->stype; } } return STYPE_NONE; } /** * Update Disabled Silenced * * Update the variable rrdcalc_flags of the structure RRDCALC according with the values of the host structure * * @param host structure that contains information about the host monitored. * @param rc structure with information about the alarm * * @return It returns 1 case rrdcalc_flags is DISABLED or 0 otherwise */ static int update_disabled_silenced(RRDHOST *host, RRDCALC *rc) { uint32_t rrdcalc_flags_old = rc->run_flags; // Clear the flags rc->run_flags &= ~(RRDCALC_FLAG_DISABLED | RRDCALC_FLAG_SILENCED); if (unlikely(silencers->all_alarms)) { if (silencers->stype == STYPE_DISABLE_ALARMS) rc->run_flags |= RRDCALC_FLAG_DISABLED; else if (silencers->stype == STYPE_SILENCE_NOTIFICATIONS) rc->run_flags |= RRDCALC_FLAG_SILENCED; } else { SILENCE_TYPE st = check_silenced(rc, rrdhost_hostname(host), silencers); if (st == STYPE_DISABLE_ALARMS) rc->run_flags |= RRDCALC_FLAG_DISABLED; else if (st == STYPE_SILENCE_NOTIFICATIONS) rc->run_flags |= RRDCALC_FLAG_SILENCED; } if (rrdcalc_flags_old != rc->run_flags) { info("Alarm silencing changed for host '%s' alarm '%s': Disabled %s->%s Silenced %s->%s", rrdhost_hostname(host), rrdcalc_name(rc), (rrdcalc_flags_old & RRDCALC_FLAG_DISABLED)?"true":"false", (rc->run_flags & RRDCALC_FLAG_DISABLED)?"true":"false", (rrdcalc_flags_old & RRDCALC_FLAG_SILENCED)?"true":"false", (rc->run_flags & RRDCALC_FLAG_SILENCED)?"true":"false" ); } if (rc->run_flags & RRDCALC_FLAG_DISABLED) return 1; else return 0; } static void health_execute_delayed_initializations(RRDHOST *host) { RRDSET *st; if (!rrdhost_flag_check(host, RRDHOST_FLAG_PENDING_HEALTH_INITIALIZATION)) return; rrdhost_flag_clear(host, RRDHOST_FLAG_PENDING_HEALTH_INITIALIZATION); rrdset_foreach_reentrant(st, host) { if(!rrdset_flag_check(st, RRDSET_FLAG_PENDING_HEALTH_INITIALIZATION)) continue; rrdset_flag_clear(st, RRDSET_FLAG_PENDING_HEALTH_INITIALIZATION); worker_is_busy(WORKER_HEALTH_JOB_DELAYED_INIT_RRDSET); if(!st->rrdfamily) st->rrdfamily = rrdfamily_add_and_acquire(host, rrdset_family(st)); if(!st->rrdvars) st->rrdvars = rrdvariables_create(); rrddimvar_index_init(st); rrdsetvar_add_and_leave_released(st, "last_collected_t", RRDVAR_TYPE_TIME_T, &st->last_collected_time.tv_sec, RRDVAR_FLAG_NONE); rrdsetvar_add_and_leave_released(st, "green", RRDVAR_TYPE_CALCULATED, &st->green, RRDVAR_FLAG_NONE); rrdsetvar_add_and_leave_released(st, "red", RRDVAR_TYPE_CALCULATED, &st->red, RRDVAR_FLAG_NONE); rrdsetvar_add_and_leave_released(st, "update_every", RRDVAR_TYPE_INT, &st->update_every, RRDVAR_FLAG_NONE); rrdcalc_link_matching_alerts_to_rrdset(st); rrdcalctemplate_link_matching_templates_to_rrdset(st); RRDDIM *rd; rrddim_foreach_read(rd, st) { if(!rrddim_flag_check(rd, RRDDIM_FLAG_PENDING_HEALTH_INITIALIZATION)) continue; rrddim_flag_clear(rd, RRDDIM_FLAG_PENDING_HEALTH_INITIALIZATION); worker_is_busy(WORKER_HEALTH_JOB_DELAYED_INIT_RRDDIM); rrddimvar_add_and_leave_released(rd, RRDVAR_TYPE_CALCULATED, NULL, NULL, &rd->last_stored_value, RRDVAR_FLAG_NONE); rrddimvar_add_and_leave_released(rd, RRDVAR_TYPE_COLLECTED, NULL, "_raw", &rd->last_collected_value, RRDVAR_FLAG_NONE); rrddimvar_add_and_leave_released(rd, RRDVAR_TYPE_TIME_T, NULL, "_last_collected_t", &rd->last_collected_time.tv_sec, RRDVAR_FLAG_NONE); RRDCALCTEMPLATE *rt; foreach_rrdcalctemplate_read(host, rt) { if(!rt->foreach_dimension_pattern) continue; if(rrdcalctemplate_check_rrdset_conditions(rt, st, host)) rrdcalctemplate_check_rrddim_conditions_and_link(rt, st, rd, host); } foreach_rrdcalctemplate_done(rt); } rrddim_foreach_done(rd); } rrdset_foreach_done(st); } /** * Health Main * * The main thread of the health system. In this function all the alarms will be processed. * * @param ptr is a pointer to the netdata_static_thread structure. * * @return It always returns NULL */ void *health_main(void *ptr) { worker_register("HEALTH"); worker_register_job_name(WORKER_HEALTH_JOB_RRD_LOCK, "rrd lock"); worker_register_job_name(WORKER_HEALTH_JOB_HOST_LOCK, "host lock"); worker_register_job_name(WORKER_HEALTH_JOB_DB_QUERY, "db lookup"); worker_register_job_name(WORKER_HEALTH_JOB_CALC_EVAL, "calc eval"); worker_register_job_name(WORKER_HEALTH_JOB_WARNING_EVAL, "warning eval"); worker_register_job_name(WORKER_HEALTH_JOB_CRITICAL_EVAL, "critical eval"); worker_register_job_name(WORKER_HEALTH_JOB_ALARM_LOG_ENTRY, "alarm log entry"); worker_register_job_name(WORKER_HEALTH_JOB_ALARM_LOG_PROCESS, "alarm log process"); worker_register_job_name(WORKER_HEALTH_JOB_DELAYED_INIT_RRDSET, "rrdset init"); worker_register_job_name(WORKER_HEALTH_JOB_DELAYED_INIT_RRDDIM, "rrddim init"); struct health_state *h = ptr; netdata_thread_cleanup_push(health_thread_cleanup, ptr); RRDHOST *host = h->host; initialize_health(host, host == localhost); int min_run_every = (int)config_get_number(CONFIG_SECTION_HEALTH, "run at least every seconds", 10); if(min_run_every < 1) min_run_every = 1; int cleanup_sql_every_loop = 7200 / min_run_every; time_t now = now_realtime_sec(); time_t hibernation_delay = config_get_number(CONFIG_SECTION_HEALTH, "postpone alarms during hibernation for seconds", 60); bool health_running_logged = false; rrdhost_rdlock(host); //CHECK rrdcalc_delete_alerts_not_matching_host_labels_from_this_host(host); rrdhost_unlock(host); unsigned int loop = 0; #ifdef ENABLE_ACLK unsigned int marked_aclk_reload_loop = 0; #endif while(!netdata_exit && host->health_enabled) { loop++; debug(D_HEALTH, "Health monitoring iteration no %u started", loop); now = now_realtime_sec(); int runnable = 0, apply_hibernation_delay = 0; time_t next_run = now + min_run_every; RRDCALC *rc; if (unlikely(check_if_resumed_from_suspension())) { apply_hibernation_delay = 1; log_health( "[%s]: Postponing alarm checks for %"PRId64" seconds, " "because it seems that the system was just resumed from suspension.", rrdhost_hostname(host), (int64_t)hibernation_delay); } if (unlikely(silencers->all_alarms && silencers->stype == STYPE_DISABLE_ALARMS)) { static __thread int logged=0; if (!logged) { log_health("[%s]: Skipping health checks, because all alarms are disabled via a %s command.", rrdhost_hostname(host), HEALTH_CMDAPI_CMD_DISABLEALL); logged = 1; } } #ifdef ENABLE_ACLK if (host->aclk_alert_reloaded && !marked_aclk_reload_loop) marked_aclk_reload_loop = loop; #endif if (unlikely(apply_hibernation_delay)) { log_health( "[%s]: Postponing health checks for %"PRId64" seconds.", rrdhost_hostname(host), (int64_t)hibernation_delay); host->health_delay_up_to = now + hibernation_delay; next_run = now + hibernation_delay; health_sleep(next_run, loop, host); } if (unlikely(host->health_delay_up_to)) { if (unlikely(now < host->health_delay_up_to)) { next_run = host->health_delay_up_to; health_sleep(next_run, loop, host); continue; } log_health("[%s]: Resuming health checks after delay.", rrdhost_hostname(host)); host->health_delay_up_to = 0; } // wait until cleanup of obsolete charts on children is complete if (host != localhost) { if (unlikely(host->trigger_chart_obsoletion_check == 1)) { log_health("[%s]: Waiting for chart obsoletion check.", rrdhost_hostname(host)); health_sleep(next_run, loop, host); continue; } } if (!health_running_logged) { log_health("[%s]: Health is running.", rrdhost_hostname(host)); health_running_logged = true; } if(likely(!host->health_log_fp) && (loop == 1 || loop % cleanup_sql_every_loop == 0)) sql_health_alarm_log_cleanup(host); health_execute_delayed_initializations(host); worker_is_busy(WORKER_HEALTH_JOB_HOST_LOCK); // the first loop is to lookup values from the db foreach_rrdcalc_in_rrdhost_read(host, rc) { rrdcalc_update_info_using_rrdset_labels(rc); if (update_disabled_silenced(host, rc)) continue; // create an alert removed event if the chart is obsolete and // has stopped being collected for 60 seconds if (unlikely(rc->rrdset && rc->status != RRDCALC_STATUS_REMOVED && rrdset_flag_check(rc->rrdset, RRDSET_FLAG_OBSOLETE) && now > (rc->rrdset->last_collected_time.tv_sec + 60))) { if (!rrdcalc_isrepeating(rc)) { worker_is_busy(WORKER_HEALTH_JOB_ALARM_LOG_ENTRY); time_t now = now_realtime_sec(); ALARM_ENTRY *ae = health_create_alarm_entry( host, rc->id, rc->next_event_id++, rc->config_hash_id, now, rc->name, rc->rrdset->id, rc->rrdset->context, rc->rrdset->family, rc->classification, rc->component, rc->type, rc->exec, rc->recipient, now - rc->last_status_change, rc->value, NAN, rc->status, RRDCALC_STATUS_REMOVED, rc->source, rc->units, rc->info, 0, rrdcalc_isrepeating(rc)?HEALTH_ENTRY_FLAG_IS_REPEATING:0); if (ae) { health_alarm_log_add_entry(host, ae); rc->old_status = rc->status; rc->status = RRDCALC_STATUS_REMOVED; rc->last_status_change = now; rc->last_updated = now; rc->value = NAN; #ifdef ENABLE_ACLK if (netdata_cloud_setting && likely(!host->aclk_alert_reloaded)) sql_queue_alarm_to_aclk(host, ae, 1); #endif } } } if (unlikely(!rrdcalc_isrunnable(rc, now, &next_run))) { if (unlikely(rc->run_flags & RRDCALC_FLAG_RUNNABLE)) rc->run_flags &= ~RRDCALC_FLAG_RUNNABLE; continue; } runnable++; rc->old_value = rc->value; rc->run_flags |= RRDCALC_FLAG_RUNNABLE; // ------------------------------------------------------------ // if there is database lookup, do it if (unlikely(RRDCALC_HAS_DB_LOOKUP(rc))) { worker_is_busy(WORKER_HEALTH_JOB_DB_QUERY); /* time_t old_db_timestamp = rc->db_before; */ int value_is_null = 0; int ret = rrdset2value_api_v1(rc->rrdset, NULL, &rc->value, rrdcalc_dimensions(rc), 1, rc->after, rc->before, rc->group, NULL, 0, rc->options, &rc->db_after,&rc->db_before, NULL, NULL, NULL, &value_is_null, NULL, 0, 0, QUERY_SOURCE_HEALTH); if (unlikely(ret != 200)) { // database lookup failed rc->value = NAN; rc->run_flags |= RRDCALC_FLAG_DB_ERROR; debug(D_HEALTH, "Health on host '%s', alarm '%s.%s': database lookup returned error %d", rrdhost_hostname(host), rrdcalc_chart_name(rc), rrdcalc_name(rc), ret ); } else rc->run_flags &= ~RRDCALC_FLAG_DB_ERROR; /* - RRDCALC_FLAG_DB_STALE not currently used if (unlikely(old_db_timestamp == rc->db_before)) { // database is stale debug(D_HEALTH, "Health on host '%s', alarm '%s.%s': database is stale", host->hostname, rc->chart?rc->chart:"NOCHART", rc->name); if (unlikely(!(rc->rrdcalc_flags & RRDCALC_FLAG_DB_STALE))) { rc->rrdcalc_flags |= RRDCALC_FLAG_DB_STALE; error("Health on host '%s', alarm '%s.%s': database is stale", host->hostname, rc->chart?rc->chart:"NOCHART", rc->name); } } else if (unlikely(rc->rrdcalc_flags & RRDCALC_FLAG_DB_STALE)) rc->rrdcalc_flags &= ~RRDCALC_FLAG_DB_STALE; */ if (unlikely(value_is_null)) { // collected value is null rc->value = NAN; rc->run_flags |= RRDCALC_FLAG_DB_NAN; debug(D_HEALTH, "Health on host '%s', alarm '%s.%s': database lookup returned empty value (possibly value is not collected yet)", rrdhost_hostname(host), rrdcalc_chart_name(rc), rrdcalc_name(rc) ); } else rc->run_flags &= ~RRDCALC_FLAG_DB_NAN; debug(D_HEALTH, "Health on host '%s', alarm '%s.%s': database lookup gave value " NETDATA_DOUBLE_FORMAT, rrdhost_hostname(host), rrdcalc_chart_name(rc), rrdcalc_name(rc), rc->value ); } // ------------------------------------------------------------ // if there is calculation expression, run it if (unlikely(rc->calculation)) { worker_is_busy(WORKER_HEALTH_JOB_CALC_EVAL); if (unlikely(!expression_evaluate(rc->calculation))) { // calculation failed rc->value = NAN; rc->run_flags |= RRDCALC_FLAG_CALC_ERROR; debug(D_HEALTH, "Health on host '%s', alarm '%s.%s': expression '%s' failed: %s", rrdhost_hostname(host), rrdcalc_chart_name(rc), rrdcalc_name(rc), rc->calculation->parsed_as, buffer_tostring(rc->calculation->error_msg) ); } else { rc->run_flags &= ~RRDCALC_FLAG_CALC_ERROR; debug(D_HEALTH, "Health on host '%s', alarm '%s.%s': expression '%s' gave value " NETDATA_DOUBLE_FORMAT ": %s (source: %s)", rrdhost_hostname(host), rrdcalc_chart_name(rc), rrdcalc_name(rc), rc->calculation->parsed_as, rc->calculation->result, buffer_tostring(rc->calculation->error_msg), rrdcalc_source(rc) ); rc->value = rc->calculation->result; } } } foreach_rrdcalc_in_rrdhost_done(rc); if (unlikely(runnable && !netdata_exit)) { foreach_rrdcalc_in_rrdhost_read(host, rc) { if (unlikely(!(rc->run_flags & RRDCALC_FLAG_RUNNABLE))) continue; if (rc->run_flags & RRDCALC_FLAG_DISABLED) { continue; } RRDCALC_STATUS warning_status = RRDCALC_STATUS_UNDEFINED; RRDCALC_STATUS critical_status = RRDCALC_STATUS_UNDEFINED; // -------------------------------------------------------- // check the warning expression if (likely(rc->warning)) { worker_is_busy(WORKER_HEALTH_JOB_WARNING_EVAL); if (unlikely(!expression_evaluate(rc->warning))) { // calculation failed rc->run_flags |= RRDCALC_FLAG_WARN_ERROR; debug(D_HEALTH, "Health on host '%s', alarm '%s.%s': warning expression failed with error: %s", rrdhost_hostname(host), rrdcalc_chart_name(rc), rrdcalc_name(rc), buffer_tostring(rc->warning->error_msg) ); } else { rc->run_flags &= ~RRDCALC_FLAG_WARN_ERROR; debug(D_HEALTH, "Health on host '%s', alarm '%s.%s': warning expression gave value " NETDATA_DOUBLE_FORMAT ": %s (source: %s)", rrdhost_hostname(host), rrdcalc_chart_name(rc), rrdcalc_name(rc), rc->warning->result, buffer_tostring(rc->warning->error_msg), rrdcalc_source(rc) ); warning_status = rrdcalc_value2status(rc->warning->result); } } // -------------------------------------------------------- // check the critical expression if (likely(rc->critical)) { worker_is_busy(WORKER_HEALTH_JOB_CRITICAL_EVAL); if (unlikely(!expression_evaluate(rc->critical))) { // calculation failed rc->run_flags |= RRDCALC_FLAG_CRIT_ERROR; debug(D_HEALTH, "Health on host '%s', alarm '%s.%s': critical expression failed with error: %s", rrdhost_hostname(host), rrdcalc_chart_name(rc), rrdcalc_name(rc), buffer_tostring(rc->critical->error_msg) ); } else { rc->run_flags &= ~RRDCALC_FLAG_CRIT_ERROR; debug(D_HEALTH, "Health on host '%s', alarm '%s.%s': critical expression gave value " NETDATA_DOUBLE_FORMAT ": %s (source: %s)", rrdhost_hostname(host), rrdcalc_chart_name(rc), rrdcalc_name(rc), rc->critical->result, buffer_tostring(rc->critical->error_msg), rrdcalc_source(rc) ); critical_status = rrdcalc_value2status(rc->critical->result); } } // -------------------------------------------------------- // decide the final alarm status RRDCALC_STATUS status = RRDCALC_STATUS_UNDEFINED; switch (warning_status) { case RRDCALC_STATUS_CLEAR: status = RRDCALC_STATUS_CLEAR; break; case RRDCALC_STATUS_RAISED: status = RRDCALC_STATUS_WARNING; break; default: break; } switch (critical_status) { case RRDCALC_STATUS_CLEAR: if (status == RRDCALC_STATUS_UNDEFINED) status = RRDCALC_STATUS_CLEAR; break; case RRDCALC_STATUS_RAISED: status = RRDCALC_STATUS_CRITICAL; break; default: break; } // -------------------------------------------------------- // check if the new status and the old differ if (status != rc->status) { worker_is_busy(WORKER_HEALTH_JOB_ALARM_LOG_ENTRY); int delay = 0; // apply trigger hysteresis if (now > rc->delay_up_to_timestamp) { rc->delay_up_current = rc->delay_up_duration; rc->delay_down_current = rc->delay_down_duration; rc->delay_last = 0; rc->delay_up_to_timestamp = 0; } else { rc->delay_up_current = (int) (rc->delay_up_current * rc->delay_multiplier); if (rc->delay_up_current > rc->delay_max_duration) rc->delay_up_current = rc->delay_max_duration; rc->delay_down_current = (int) (rc->delay_down_current * rc->delay_multiplier); if (rc->delay_down_current > rc->delay_max_duration) rc->delay_down_current = rc->delay_max_duration; } if (status > rc->status) delay = rc->delay_up_current; else delay = rc->delay_down_current; // COMMENTED: because we do need to send raising alarms // if(now + delay < rc->delay_up_to_timestamp) // delay = (int)(rc->delay_up_to_timestamp - now); rc->delay_last = delay; rc->delay_up_to_timestamp = now + delay; ALARM_ENTRY *ae = health_create_alarm_entry( host, rc->id, rc->next_event_id++, rc->config_hash_id, now, rc->name, rc->rrdset->id, rc->rrdset->context, rc->rrdset->family, rc->classification, rc->component, rc->type, rc->exec, rc->recipient, now - rc->last_status_change, rc->old_value, rc->value, rc->status, status, rc->source, rc->units, rc->info, rc->delay_last, ( ((rc->options & RRDCALC_OPTION_NO_CLEAR_NOTIFICATION)? HEALTH_ENTRY_FLAG_NO_CLEAR_NOTIFICATION : 0) | ((rc->run_flags & RRDCALC_FLAG_SILENCED)? HEALTH_ENTRY_FLAG_SILENCED : 0) | (rrdcalc_isrepeating(rc)?HEALTH_ENTRY_FLAG_IS_REPEATING:0) ) ); health_alarm_log_add_entry(host, ae); log_health("[%s]: Alert event for [%s.%s], value [%s], status [%s].", rrdhost_hostname(host), ae_chart_name(ae), ae_name(ae), ae_new_value_string(ae), rrdcalc_status2string(ae->new_status)); rc->last_status_change = now; rc->old_status = rc->status; rc->status = status; } rc->last_updated = now; rc->next_update = now + rc->update_every; if (next_run > rc->next_update) next_run = rc->next_update; } foreach_rrdcalc_in_rrdhost_done(rc); // process repeating alarms foreach_rrdcalc_in_rrdhost_read(host, rc) { int repeat_every = 0; if(unlikely(rrdcalc_isrepeating(rc) && rc->delay_up_to_timestamp <= now)) { if(unlikely(rc->status == RRDCALC_STATUS_WARNING)) { rc->run_flags &= ~RRDCALC_FLAG_RUN_ONCE; repeat_every = rc->warn_repeat_every; } else if(unlikely(rc->status == RRDCALC_STATUS_CRITICAL)) { rc->run_flags &= ~RRDCALC_FLAG_RUN_ONCE; repeat_every = rc->crit_repeat_every; } else if(unlikely(rc->status == RRDCALC_STATUS_CLEAR)) { if(!(rc->run_flags & RRDCALC_FLAG_RUN_ONCE)) { if(rc->old_status == RRDCALC_STATUS_CRITICAL) { repeat_every = 1; } else if (rc->old_status == RRDCALC_STATUS_WARNING) { repeat_every = 1; } } } } else { continue; } if(unlikely(repeat_every > 0 && (rc->last_repeat + repeat_every) <= now)) { worker_is_busy(WORKER_HEALTH_JOB_ALARM_LOG_ENTRY); rc->last_repeat = now; if (likely(rc->times_repeat < UINT32_MAX)) rc->times_repeat++; ALARM_ENTRY *ae = health_create_alarm_entry( host, rc->id, rc->next_event_id++, rc->config_hash_id, now, rc->name, rc->rrdset->id, rc->rrdset->context, rc->rrdset->family, rc->classification, rc->component, rc->type, rc->exec, rc->recipient, now - rc->last_status_change, rc->old_value, rc->value, rc->old_status, rc->status, rc->source, rc->units, rc->info, rc->delay_last, ( ((rc->options & RRDCALC_OPTION_NO_CLEAR_NOTIFICATION)? HEALTH_ENTRY_FLAG_NO_CLEAR_NOTIFICATION : 0) | ((rc->run_flags & RRDCALC_FLAG_SILENCED)? HEALTH_ENTRY_FLAG_SILENCED : 0) | (rrdcalc_isrepeating(rc)?HEALTH_ENTRY_FLAG_IS_REPEATING:0) ) ); ae->last_repeat = rc->last_repeat; if (!(rc->run_flags & RRDCALC_FLAG_RUN_ONCE) && rc->status == RRDCALC_STATUS_CLEAR) { ae->flags |= HEALTH_ENTRY_RUN_ONCE; } rc->run_flags |= RRDCALC_FLAG_RUN_ONCE; health_process_notifications(host, ae); debug(D_HEALTH, "Notification sent for the repeating alarm %u.", ae->alarm_id); health_alarm_wait_for_execution(ae); health_alarm_log_free_one_nochecks_nounlink(ae); } } foreach_rrdcalc_in_rrdhost_done(rc); } if (unlikely(netdata_exit)) break; // execute notifications // and cleanup worker_is_busy(WORKER_HEALTH_JOB_ALARM_LOG_PROCESS); health_alarm_log_process(host); if (unlikely(netdata_exit)) { // wait for all notifications to finish before allowing health to be cleaned up ALARM_ENTRY *ae; while (NULL != (ae = alarm_notifications_in_progress.head)) { health_alarm_wait_for_execution(ae); } break; } // wait for all notifications to finish before allowing health to be cleaned up ALARM_ENTRY *ae; while (NULL != (ae = alarm_notifications_in_progress.head)) { health_alarm_wait_for_execution(ae); } #ifdef ENABLE_ACLK if (netdata_cloud_setting && unlikely(host->aclk_alert_reloaded) && loop > (marked_aclk_reload_loop + 2)) { sql_queue_removed_alerts_to_aclk(host); host->aclk_alert_reloaded = 0; marked_aclk_reload_loop = 0; } #endif if(unlikely(netdata_exit)) break; health_sleep(next_run, loop, host); } // forever netdata_thread_cleanup_pop(1); return NULL; } void health_add_host_labels(void) { DICTIONARY *labels = localhost->rrdlabels; int is_ephemeral = appconfig_get_boolean(&netdata_config, CONFIG_SECTION_HEALTH, "is ephemeral", CONFIG_BOOLEAN_NO); rrdlabels_add(labels, "_is_ephemeral", is_ephemeral ? "true" : "false", RRDLABEL_SRC_CONFIG); int has_unstable_connection = appconfig_get_boolean(&netdata_config, CONFIG_SECTION_HEALTH, "has unstable connection", CONFIG_BOOLEAN_NO); rrdlabels_add(labels, "_has_unstable_connection", has_unstable_connection ? "true" : "false", RRDLABEL_SRC_CONFIG); } void health_thread_spawn(RRDHOST * host) { if(!host->health_spawn) { char tag[NETDATA_THREAD_TAG_MAX + 1]; snprintfz(tag, NETDATA_THREAD_TAG_MAX, "HEALTH[%s]", rrdhost_hostname(host)); struct health_state *health = callocz(1, sizeof(*health)); health->host = host; if(netdata_thread_create(&host->health_thread, tag, NETDATA_THREAD_OPTION_JOINABLE, health_main, (void *) health)) { log_health("[%s]: Failed to create new thread for client.", rrdhost_hostname(host)); error("HEALTH [%s]: Failed to create new thread for client.", rrdhost_hostname(host)); } else { log_health("[%s]: Created new thread for client.", rrdhost_hostname(host)); host->health_spawn = 1; host->aclk_alert_reloaded = 1; } } }