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-rw-r--r--health/health_log.c463
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);
+}