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health_log.c
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health_log.c
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// 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
"\t%016lx"
"\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
, (uint64_t)ae->last_repeat
) < 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;
}
// Check if we got last_repeat field
time_t last_repeat = 0;
if(entries > 27) {
char* alarm_name = pointers[13];
last_repeat = (time_t)strtoul(pointers[27], NULL, 16);
RRDCALC *rc = alarm_max_last_repeat(host, alarm_name,simple_hash(alarm_name));
if (!rc) {
for(rc = host->alarms; rc ; rc = rc->next) {
RRDCALC *rdcmp = (RRDCALC *) avl_insert_lock(&(host)->alarms_idx_name, (avl *)rc);
if(rdcmp != rc) {
error("Cannot insert the alarm index ID using log %s", rc->name);
}
}
rc = alarm_max_last_repeat(host, alarm_name,simple_hash(alarm_name));
}
if(unlikely(rc)) {
if (rrdcalc_isrepeating(rc)) {
rc->last_repeat = last_repeat;
// We iterate through repeating alarm entries only to
// find the latest last_repeat timestamp. Otherwise,
// there is no need to keep them in memory.
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]);
ae->last_repeat = last_repeat;
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 ALARM_ENTRY* health_create_alarm_entry(
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;
ae->last_repeat = 0;
if(ae->old_status == RRDCALC_STATUS_WARNING || ae->old_status == RRDCALC_STATUS_CRITICAL)
ae->non_clear_duration += ae->duration;
return ae;
}
inline void health_alarm_log(
RRDHOST *host,
ALARM_ENTRY *ae
) {
debug(D_HEALTH, "Health adding alarm log entry with id: %u", ae->unique_id);
if(unlikely(alarm_entry_isrepeating(host, ae))) {
error("Repeating alarms cannot be added to host's alarm log entries. It seems somewhere in the logic, API is being misused. Alarm id: %u", ae->alarm_id);
return;
}
// 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);
}