diff options
Diffstat (limited to '')
| -rw-r--r-- | health/health_log.c | 463 |
1 files changed, 463 insertions, 0 deletions
diff --git a/health/health_log.c b/health/health_log.c new file mode 100644 index 0000000..009e426 --- /dev/null +++ b/health/health_log.c @@ -0,0 +1,463 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#include "health.h" + +// ---------------------------------------------------------------------------- +// health alarm log load/save +// no need for locking - only one thread is reading / writing the alarms log + +inline int health_alarm_log_open(RRDHOST *host) { + if(host->health_log_fp) + fclose(host->health_log_fp); + + host->health_log_fp = fopen(host->health_log_filename, "a"); + + if(host->health_log_fp) { + if (setvbuf(host->health_log_fp, NULL, _IOLBF, 0) != 0) + error("HEALTH [%s]: cannot set line buffering on health log file '%s'.", host->hostname, host->health_log_filename); + return 0; + } + + error("HEALTH [%s]: cannot open health log file '%s'. Health data will be lost in case of netdata or server crash.", host->hostname, host->health_log_filename); + return -1; +} + +inline void health_alarm_log_close(RRDHOST *host) { + if(host->health_log_fp) { + fclose(host->health_log_fp); + host->health_log_fp = NULL; + } +} + +inline void health_log_rotate(RRDHOST *host) { + static size_t rotate_every = 0; + + if(unlikely(rotate_every == 0)) { + rotate_every = (size_t)config_get_number(CONFIG_SECTION_HEALTH, "rotate log every lines", 2000); + if(rotate_every < 100) rotate_every = 100; + } + + if(unlikely(host->health_log_entries_written > rotate_every)) { + health_alarm_log_close(host); + + char old_filename[FILENAME_MAX + 1]; + snprintfz(old_filename, FILENAME_MAX, "%s.old", host->health_log_filename); + + if(unlink(old_filename) == -1 && errno != ENOENT) + error("HEALTH [%s]: cannot remove old alarms log file '%s'", host->hostname, old_filename); + + if(link(host->health_log_filename, old_filename) == -1 && errno != ENOENT) + error("HEALTH [%s]: cannot move file '%s' to '%s'.", host->hostname, host->health_log_filename, old_filename); + + if(unlink(host->health_log_filename) == -1 && errno != ENOENT) + error("HEALTH [%s]: cannot remove old alarms log file '%s'", host->hostname, host->health_log_filename); + + // open it with truncate + host->health_log_fp = fopen(host->health_log_filename, "w"); + + if(host->health_log_fp) + fclose(host->health_log_fp); + else + error("HEALTH [%s]: cannot truncate health log '%s'", host->hostname, host->health_log_filename); + + host->health_log_fp = NULL; + + host->health_log_entries_written = 0; + health_alarm_log_open(host); + } +} + +inline void health_alarm_log_save(RRDHOST *host, ALARM_ENTRY *ae) { + health_log_rotate(host); + + if(likely(host->health_log_fp)) { + if(unlikely(fprintf(host->health_log_fp + , "%c\t%s" + "\t%08x\t%08x\t%08x\t%08x\t%08x" + "\t%08x\t%08x\t%08x" + "\t%08x\t%08x\t%08x" + "\t%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s" + "\t%d\t%d\t%d\t%d" + "\t" CALCULATED_NUMBER_FORMAT_AUTO "\t" CALCULATED_NUMBER_FORMAT_AUTO + "\n" + , (ae->flags & HEALTH_ENTRY_FLAG_SAVED)?'U':'A' + , host->hostname + + , ae->unique_id + , ae->alarm_id + , ae->alarm_event_id + , ae->updated_by_id + , ae->updates_id + + , (uint32_t)ae->when + , (uint32_t)ae->duration + , (uint32_t)ae->non_clear_duration + , (uint32_t)ae->flags + , (uint32_t)ae->exec_run_timestamp + , (uint32_t)ae->delay_up_to_timestamp + + , (ae->name)?ae->name:"" + , (ae->chart)?ae->chart:"" + , (ae->family)?ae->family:"" + , (ae->exec)?ae->exec:"" + , (ae->recipient)?ae->recipient:"" + , (ae->source)?ae->source:"" + , (ae->units)?ae->units:"" + , (ae->info)?ae->info:"" + + , ae->exec_code + , ae->new_status + , ae->old_status + , ae->delay + + , ae->new_value + , ae->old_value + ) < 0)) + error("HEALTH [%s]: failed to save alarm log entry to '%s'. Health data may be lost in case of abnormal restart.", host->hostname, host->health_log_filename); + else { + ae->flags |= HEALTH_ENTRY_FLAG_SAVED; + host->health_log_entries_written++; + } + } +} + +inline ssize_t health_alarm_log_read(RRDHOST *host, FILE *fp, const char *filename) { + errno = 0; + + char *s, *buf = mallocz(65536 + 1); + size_t line = 0, len = 0; + ssize_t loaded = 0, updated = 0, errored = 0, duplicate = 0; + + netdata_rwlock_rdlock(&host->health_log.alarm_log_rwlock); + + while((s = fgets_trim_len(buf, 65536, fp, &len))) { + host->health_log_entries_written++; + line++; + + int max_entries = 30, entries = 0; + char *pointers[max_entries]; + + pointers[entries++] = s++; + while(*s) { + if(unlikely(*s == '\t')) { + *s = '\0'; + pointers[entries++] = ++s; + if(entries >= max_entries) { + error("HEALTH [%s]: line %zu of file '%s' has more than %d entries. Ignoring excessive entries.", host->hostname, line, filename, max_entries); + break; + } + } + else s++; + } + + if(likely(*pointers[0] == 'U' || *pointers[0] == 'A')) { + ALARM_ENTRY *ae = NULL; + + if(entries < 26) { + error("HEALTH [%s]: line %zu of file '%s' should have at least 26 entries, but it has %d. Ignoring it.", host->hostname, line, filename, entries); + errored++; + continue; + } + + // check that we have valid ids + uint32_t unique_id = (uint32_t)strtoul(pointers[2], NULL, 16); + if(!unique_id) { + error("HEALTH [%s]: line %zu of file '%s' states alarm entry with invalid unique id %u (%s). Ignoring it.", host->hostname, line, filename, unique_id, pointers[2]); + errored++; + continue; + } + + uint32_t alarm_id = (uint32_t)strtoul(pointers[3], NULL, 16); + if(!alarm_id) { + error("HEALTH [%s]: line %zu of file '%s' states alarm entry for invalid alarm id %u (%s). Ignoring it.", host->hostname, line, filename, alarm_id, pointers[3]); + errored++; + continue; + } + + if(unlikely(*pointers[0] == 'A')) { + // make sure it is properly numbered + if(unlikely(host->health_log.alarms && unique_id < host->health_log.alarms->unique_id)) { + error("HEALTH [%s]: line %zu of file '%s' has alarm log entry %u in wrong order. Ignoring it.", host->hostname, line, filename, unique_id); + errored++; + continue; + } + + ae = callocz(1, sizeof(ALARM_ENTRY)); + } + else if(unlikely(*pointers[0] == 'U')) { + // find the original + for(ae = host->health_log.alarms; ae; ae = ae->next) { + if(unlikely(unique_id == ae->unique_id)) { + if(unlikely(*pointers[0] == 'A')) { + error("HEALTH [%s]: line %zu of file '%s' adds duplicate alarm log entry %u. Using the later." + , host->hostname, line, filename, unique_id); + *pointers[0] = 'U'; + duplicate++; + } + break; + } + else if(unlikely(unique_id > ae->unique_id)) { + // no need to continue + // the linked list is sorted + ae = NULL; + break; + } + } + } + + // if not found, skip this line + if(unlikely(!ae)) { + // error("HEALTH [%s]: line %zu of file '%s' updates alarm log entry with unique id %u, but it is not found.", host->hostname, line, filename, unique_id); + continue; + } + + // check for a possible host missmatch + //if(strcmp(pointers[1], host->hostname)) + // error("HEALTH [%s]: line %zu of file '%s' provides an alarm for host '%s' but this is named '%s'.", host->hostname, line, filename, pointers[1], host->hostname); + + ae->unique_id = unique_id; + ae->alarm_id = alarm_id; + ae->alarm_event_id = (uint32_t)strtoul(pointers[4], NULL, 16); + ae->updated_by_id = (uint32_t)strtoul(pointers[5], NULL, 16); + ae->updates_id = (uint32_t)strtoul(pointers[6], NULL, 16); + + ae->when = (uint32_t)strtoul(pointers[7], NULL, 16); + ae->duration = (uint32_t)strtoul(pointers[8], NULL, 16); + ae->non_clear_duration = (uint32_t)strtoul(pointers[9], NULL, 16); + + ae->flags = (uint32_t)strtoul(pointers[10], NULL, 16); + ae->flags |= HEALTH_ENTRY_FLAG_SAVED; + + ae->exec_run_timestamp = (uint32_t)strtoul(pointers[11], NULL, 16); + ae->delay_up_to_timestamp = (uint32_t)strtoul(pointers[12], NULL, 16); + + freez(ae->name); + ae->name = strdupz(pointers[13]); + ae->hash_name = simple_hash(ae->name); + + freez(ae->chart); + ae->chart = strdupz(pointers[14]); + ae->hash_chart = simple_hash(ae->chart); + + freez(ae->family); + ae->family = strdupz(pointers[15]); + + freez(ae->exec); + ae->exec = strdupz(pointers[16]); + if(!*ae->exec) { freez(ae->exec); ae->exec = NULL; } + + freez(ae->recipient); + ae->recipient = strdupz(pointers[17]); + if(!*ae->recipient) { freez(ae->recipient); ae->recipient = NULL; } + + freez(ae->source); + ae->source = strdupz(pointers[18]); + if(!*ae->source) { freez(ae->source); ae->source = NULL; } + + freez(ae->units); + ae->units = strdupz(pointers[19]); + if(!*ae->units) { freez(ae->units); ae->units = NULL; } + + freez(ae->info); + ae->info = strdupz(pointers[20]); + if(!*ae->info) { freez(ae->info); ae->info = NULL; } + + ae->exec_code = str2i(pointers[21]); + ae->new_status = str2i(pointers[22]); + ae->old_status = str2i(pointers[23]); + ae->delay = str2i(pointers[24]); + + ae->new_value = str2l(pointers[25]); + ae->old_value = str2l(pointers[26]); + + char value_string[100 + 1]; + freez(ae->old_value_string); + freez(ae->new_value_string); + ae->old_value_string = strdupz(format_value_and_unit(value_string, 100, ae->old_value, ae->units, -1)); + ae->new_value_string = strdupz(format_value_and_unit(value_string, 100, ae->new_value, ae->units, -1)); + + // add it to host if not already there + if(unlikely(*pointers[0] == 'A')) { + ae->next = host->health_log.alarms; + host->health_log.alarms = ae; + loaded++; + } + else updated++; + + if(unlikely(ae->unique_id > host->health_max_unique_id)) + host->health_max_unique_id = ae->unique_id; + + if(unlikely(ae->alarm_id >= host->health_max_alarm_id)) + host->health_max_alarm_id = ae->alarm_id; + } + else { + error("HEALTH [%s]: line %zu of file '%s' is invalid (unrecognized entry type '%s').", host->hostname, line, filename, pointers[0]); + errored++; + } + } + + netdata_rwlock_unlock(&host->health_log.alarm_log_rwlock); + + freez(buf); + + if(!host->health_max_unique_id) host->health_max_unique_id = (uint32_t)now_realtime_sec(); + if(!host->health_max_alarm_id) host->health_max_alarm_id = (uint32_t)now_realtime_sec(); + + host->health_log.next_log_id = host->health_max_unique_id + 1; + host->health_log.next_alarm_id = host->health_max_alarm_id + 1; + + debug(D_HEALTH, "HEALTH [%s]: loaded file '%s' with %zd new alarm entries, updated %zd alarms, errors %zd entries, duplicate %zd", host->hostname, filename, loaded, updated, errored, duplicate); + return loaded; +} + +inline void health_alarm_log_load(RRDHOST *host) { + health_alarm_log_close(host); + + char filename[FILENAME_MAX + 1]; + snprintfz(filename, FILENAME_MAX, "%s.old", host->health_log_filename); + FILE *fp = fopen(filename, "r"); + if(!fp) + error("HEALTH [%s]: cannot open health file: %s", host->hostname, filename); + else { + health_alarm_log_read(host, fp, filename); + fclose(fp); + } + + host->health_log_entries_written = 0; + fp = fopen(host->health_log_filename, "r"); + if(!fp) + error("HEALTH [%s]: cannot open health file: %s", host->hostname, host->health_log_filename); + else { + health_alarm_log_read(host, fp, host->health_log_filename); + fclose(fp); + } + + health_alarm_log_open(host); +} + + +// ---------------------------------------------------------------------------- +// health alarm log management + +inline void health_alarm_log( + RRDHOST *host, + uint32_t alarm_id, + uint32_t alarm_event_id, + time_t when, + const char *name, + const char *chart, + const char *family, + const char *exec, + const char *recipient, + time_t duration, + calculated_number old_value, + calculated_number new_value, + RRDCALC_STATUS old_status, + RRDCALC_STATUS new_status, + const char *source, + const char *units, + const char *info, + int delay, + uint32_t flags +) { + debug(D_HEALTH, "Health adding alarm log entry with id: %u", host->health_log.next_log_id); + + ALARM_ENTRY *ae = callocz(1, sizeof(ALARM_ENTRY)); + ae->name = strdupz(name); + ae->hash_name = simple_hash(ae->name); + + if(chart) { + ae->chart = strdupz(chart); + ae->hash_chart = simple_hash(ae->chart); + } + + if(family) + ae->family = strdupz(family); + + if(exec) ae->exec = strdupz(exec); + if(recipient) ae->recipient = strdupz(recipient); + if(source) ae->source = strdupz(source); + if(units) ae->units = strdupz(units); + if(info) ae->info = strdupz(info); + + ae->unique_id = host->health_log.next_log_id++; + ae->alarm_id = alarm_id; + ae->alarm_event_id = alarm_event_id; + ae->when = when; + ae->old_value = old_value; + ae->new_value = new_value; + + char value_string[100 + 1]; + ae->old_value_string = strdupz(format_value_and_unit(value_string, 100, ae->old_value, ae->units, -1)); + ae->new_value_string = strdupz(format_value_and_unit(value_string, 100, ae->new_value, ae->units, -1)); + + ae->old_status = old_status; + ae->new_status = new_status; + ae->duration = duration; + ae->delay = delay; + ae->delay_up_to_timestamp = when + delay; + ae->flags |= flags; + + if(ae->old_status == RRDCALC_STATUS_WARNING || ae->old_status == RRDCALC_STATUS_CRITICAL) + ae->non_clear_duration += ae->duration; + + // link it + netdata_rwlock_wrlock(&host->health_log.alarm_log_rwlock); + ae->next = host->health_log.alarms; + host->health_log.alarms = ae; + host->health_log.count++; + netdata_rwlock_unlock(&host->health_log.alarm_log_rwlock); + + // match previous alarms + netdata_rwlock_rdlock(&host->health_log.alarm_log_rwlock); + ALARM_ENTRY *t; + for(t = host->health_log.alarms ; t ; t = t->next) { + if(t != ae && t->alarm_id == ae->alarm_id) { + if(!(t->flags & HEALTH_ENTRY_FLAG_UPDATED) && !t->updated_by_id) { + t->flags |= HEALTH_ENTRY_FLAG_UPDATED; + t->updated_by_id = ae->unique_id; + ae->updates_id = t->unique_id; + + if((t->new_status == RRDCALC_STATUS_WARNING || t->new_status == RRDCALC_STATUS_CRITICAL) && + (t->old_status == RRDCALC_STATUS_WARNING || t->old_status == RRDCALC_STATUS_CRITICAL)) + ae->non_clear_duration += t->non_clear_duration; + + health_alarm_log_save(host, t); + } + + // no need to continue + break; + } + } + netdata_rwlock_unlock(&host->health_log.alarm_log_rwlock); + + health_alarm_log_save(host, ae); +} + +inline void health_alarm_log_free_one_nochecks_nounlink(ALARM_ENTRY *ae) { + freez(ae->name); + freez(ae->chart); + freez(ae->family); + freez(ae->exec); + freez(ae->recipient); + freez(ae->source); + freez(ae->units); + freez(ae->info); + freez(ae->old_value_string); + freez(ae->new_value_string); + freez(ae); +} + +inline void health_alarm_log_free(RRDHOST *host) { + rrdhost_check_wrlock(host); + + netdata_rwlock_wrlock(&host->health_log.alarm_log_rwlock); + + ALARM_ENTRY *ae; + while((ae = host->health_log.alarms)) { + host->health_log.alarms = ae->next; + health_alarm_log_free_one_nochecks_nounlink(ae); + } + + netdata_rwlock_unlock(&host->health_log.alarm_log_rwlock); +} |