diff options
Diffstat (limited to 'health/health.c')
| -rw-r--r-- | health/health.c | 1581 |
1 files changed, 1581 insertions, 0 deletions
diff --git a/health/health.c b/health/health.c new file mode 100644 index 0000000..3784e0f --- /dev/null +++ b/health/health.c @@ -0,0 +1,1581 @@ +// 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; + } + } +} |