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netdata/daemon/service.c

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// SPDX-License-Identifier: GPL-3.0-or-later
#include "common.h"
/* Run service jobs every X seconds */
#define SERVICE_HEARTBEAT 10
#define WORKER_JOB_CHILD_CHART_OBSOLETION_CHECK 1
#define WORKER_JOB_CLEANUP_OBSOLETE_CHARTS 2
#define WORKER_JOB_ARCHIVE_CHART 3
#define WORKER_JOB_ARCHIVE_CHART_DIMENSIONS 4
#define WORKER_JOB_ARCHIVE_DIMENSION 5
#define WORKER_JOB_CLEANUP_ORPHAN_HOSTS 6
#define WORKER_JOB_CLEANUP_OBSOLETE_CHARTS_ON_HOSTS 7
#define WORKER_JOB_FREE_HOST 9
#define WORKER_JOB_SAVE_HOST_CHARTS 10
#define WORKER_JOB_DELETE_HOST_CHARTS 11
#define WORKER_JOB_FREE_CHART 12
#define WORKER_JOB_SAVE_CHART 13
#define WORKER_JOB_DELETE_CHART 14
#define WORKER_JOB_FREE_DIMENSION 15
static void svc_rrddim_obsolete_to_archive(RRDDIM *rd) {
RRDSET *st = rd->rrdset;
if(rrddim_flag_check(rd, RRDDIM_FLAG_ARCHIVED | RRDDIM_FLAG_ACLK) || !rrddim_flag_check(rd, RRDDIM_FLAG_OBSOLETE))
return;
worker_is_busy(WORKER_JOB_ARCHIVE_DIMENSION);
rrddim_flag_set(rd, RRDDIM_FLAG_ARCHIVED);
rrddim_flag_clear(rd, RRDDIM_FLAG_OBSOLETE);
const char *cache_filename = rrddim_cache_filename(rd);
if(cache_filename) {
info("Deleting dimension file '%s'.", cache_filename);
if (unlikely(unlink(cache_filename) == -1))
error("Cannot delete dimension file '%s'", cache_filename);
}
if (rd->rrd_memory_mode == RRD_MEMORY_MODE_DBENGINE) {
rrddimvar_delete_all(rd);
/* only a collector can mark a chart as obsolete, so we must remove the reference */
size_t tiers_available = 0, tiers_said_yes = 0;
for(int tier = 0; tier < storage_tiers ;tier++) {
if(rd->tiers[tier]) {
tiers_available++;
if(rd->tiers[tier]->collect_ops.finalize(rd->tiers[tier]->db_collection_handle))
tiers_said_yes++;
rd->tiers[tier]->db_collection_handle = NULL;
}
}
if (tiers_available == tiers_said_yes && tiers_said_yes) {
/* This metric has no data and no references */
delete_dimension_uuid(&rd->metric_uuid);
}
else {
/* Do not delete this dimension */
#ifdef ENABLE_ACLK
queue_dimension_to_aclk(rd, calc_dimension_liveness(rd, now_realtime_sec()));
#endif
return;
}
}
worker_is_busy(WORKER_JOB_FREE_DIMENSION);
rrddim_free(st, rd);
}
static void svc_rrdset_archive_obsolete_dimensions(RRDSET *st, bool all_dimensions) {
worker_is_busy(WORKER_JOB_ARCHIVE_CHART_DIMENSIONS);
RRDDIM *rd;
time_t now = now_realtime_sec();
dfe_start_reentrant(st->rrddim_root_index, rd) {
if(unlikely(
all_dimensions ||
(rrddim_flag_check(rd, RRDDIM_FLAG_OBSOLETE) && (rd->last_collected_time.tv_sec + rrdset_free_obsolete_time < now))
)) {
info("Removing obsolete dimension '%s' (%s) of '%s' (%s).", rrddim_name(rd), rrddim_id(rd), rrdset_name(st), rrdset_id(st));
svc_rrddim_obsolete_to_archive(rd);
}
}
dfe_done(rd);
}
static void svc_rrdset_obsolete_to_archive(RRDSET *st) {
worker_is_busy(WORKER_JOB_ARCHIVE_CHART);
rrdset_flag_set(st, RRDSET_FLAG_ARCHIVED);
rrdset_flag_clear(st, RRDSET_FLAG_OBSOLETE);
rrdcalc_unlink_all_rrdset_alerts(st);
svc_rrdset_archive_obsolete_dimensions(st, true);
rrdsetvar_release_and_delete_all(st);
// has to be run after all dimensions are archived - or use-after-free will occur
rrdvar_delete_all(st->rrdvars);
if(st->rrd_memory_mode != RRD_MEMORY_MODE_DBENGINE) {
if(rrdhost_flag_check(st->rrdhost, RRDHOST_FLAG_DELETE_OBSOLETE_CHARTS)) {
worker_is_busy(WORKER_JOB_DELETE_CHART);
rrdset_delete_files(st);
}
else {
worker_is_busy(WORKER_JOB_SAVE_CHART);
rrdset_save(st);
}
worker_is_busy(WORKER_JOB_FREE_CHART);
rrdset_free(st);
}
}
static void svc_rrdhost_cleanup_obsolete_charts(RRDHOST *host) {
worker_is_busy(WORKER_JOB_CLEANUP_OBSOLETE_CHARTS);
time_t now = now_realtime_sec();
RRDSET *st;
rrdset_foreach_reentrant(st, host) {
if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_OBSOLETE)
&& st->last_accessed_time + rrdset_free_obsolete_time < now
&& st->last_updated.tv_sec + rrdset_free_obsolete_time < now
&& st->last_collected_time.tv_sec + rrdset_free_obsolete_time < now
)) {
svc_rrdset_obsolete_to_archive(st);
}
else if(rrdset_flag_check(st, RRDSET_FLAG_OBSOLETE_DIMENSIONS)) {
rrdset_flag_clear(st, RRDSET_FLAG_OBSOLETE_DIMENSIONS);
svc_rrdset_archive_obsolete_dimensions(st, false);
}
#ifdef ENABLE_ACLK
else
sql_check_chart_liveness(st);
#endif
}
rrdset_foreach_done(st);
}
static void svc_rrdset_check_obsoletion(RRDHOST *host) {
worker_is_busy(WORKER_JOB_CHILD_CHART_OBSOLETION_CHECK);
time_t last_entry_t;
RRDSET *st;
rrdset_foreach_read(st, host) {
last_entry_t = rrdset_last_entry_t(st);
if(last_entry_t && last_entry_t < host->senders_connect_time)
rrdset_is_obsolete(st);
}
rrdset_foreach_done(st);
}
static void svc_rrd_cleanup_obsolete_charts_from_all_hosts() {
worker_is_busy(WORKER_JOB_CLEANUP_OBSOLETE_CHARTS_ON_HOSTS);
rrd_rdlock();
RRDHOST *host;
rrdhost_foreach_read(host) {
if(rrdhost_flag_check(host, RRDHOST_FLAG_PENDING_OBSOLETE_CHARTS|RRDHOST_FLAG_PENDING_OBSOLETE_DIMENSIONS)) {
rrdhost_flag_clear(host, RRDHOST_FLAG_PENDING_OBSOLETE_CHARTS|RRDHOST_FLAG_PENDING_OBSOLETE_DIMENSIONS);
svc_rrdhost_cleanup_obsolete_charts(host);
}
if(host != localhost
&& host->trigger_chart_obsoletion_check
&& (
(
host->senders_last_chart_command
&& host->senders_last_chart_command + host->health_delay_up_to < now_realtime_sec()
)
|| (host->senders_connect_time + 300 < now_realtime_sec())
)
) {
svc_rrdset_check_obsoletion(host);
host->trigger_chart_obsoletion_check = 0;
}
}
rrd_unlock();
}
static void svc_rrdhost_cleanup_orphan_hosts(RRDHOST *protected_host) {
worker_is_busy(WORKER_JOB_CLEANUP_ORPHAN_HOSTS);
rrd_wrlock();
time_t now = now_realtime_sec();
RRDHOST *host;
restart_after_removal:
rrdhost_foreach_write(host) {
if(rrdhost_should_be_removed(host, protected_host, now)) {
info("Host '%s' with machine guid '%s' is obsolete - cleaning up.", rrdhost_hostname(host), host->machine_guid);
if (rrdhost_flag_check(host, RRDHOST_FLAG_DELETE_ORPHAN_HOST)
#ifdef ENABLE_DBENGINE
/* don't delete multi-host DB host files */
&& !(host->rrd_memory_mode == RRD_MEMORY_MODE_DBENGINE && is_storage_engine_shared(host->storage_instance[0]))
#endif
) {
worker_is_busy(WORKER_JOB_DELETE_HOST_CHARTS);
rrdhost_delete_charts(host);
}
else {
worker_is_busy(WORKER_JOB_SAVE_HOST_CHARTS);
rrdhost_save_charts(host);
}
worker_is_busy(WORKER_JOB_FREE_HOST);
rrdhost_free(host, 0);
goto restart_after_removal;
}
}
rrd_unlock();
}
static void service_main_cleanup(void *ptr)
{
struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
static_thread->enabled = NETDATA_MAIN_THREAD_EXITING;
debug(D_SYSTEM, "Cleaning up...");
worker_unregister();
static_thread->enabled = NETDATA_MAIN_THREAD_EXITED;
}
/*
* The service thread.
*/
void *service_main(void *ptr)
{
worker_register("SERVICE");
worker_register_job_name(WORKER_JOB_CHILD_CHART_OBSOLETION_CHECK, "child chart obsoletion check");
worker_register_job_name(WORKER_JOB_CLEANUP_OBSOLETE_CHARTS, "cleanup obsolete charts");
worker_register_job_name(WORKER_JOB_ARCHIVE_CHART, "archive chart");
worker_register_job_name(WORKER_JOB_ARCHIVE_CHART_DIMENSIONS, "archive chart dimensions");
worker_register_job_name(WORKER_JOB_ARCHIVE_DIMENSION, "archive dimension");
worker_register_job_name(WORKER_JOB_CLEANUP_ORPHAN_HOSTS, "cleanup orphan hosts");
worker_register_job_name(WORKER_JOB_CLEANUP_OBSOLETE_CHARTS_ON_HOSTS, "cleanup obsolete charts on all hosts");
worker_register_job_name(WORKER_JOB_FREE_HOST, "free host");
worker_register_job_name(WORKER_JOB_SAVE_HOST_CHARTS, "save host charts");
worker_register_job_name(WORKER_JOB_DELETE_HOST_CHARTS, "delete host charts");
worker_register_job_name(WORKER_JOB_FREE_CHART, "free chart");
worker_register_job_name(WORKER_JOB_SAVE_CHART, "save chart");
worker_register_job_name(WORKER_JOB_DELETE_CHART, "delete chart");
worker_register_job_name(WORKER_JOB_FREE_DIMENSION, "free dimension");
netdata_thread_cleanup_push(service_main_cleanup, ptr);
heartbeat_t hb;
heartbeat_init(&hb);
usec_t step = USEC_PER_SEC * SERVICE_HEARTBEAT;
debug(D_SYSTEM, "Service thread starts");
while (!netdata_exit) {
worker_is_idle();
heartbeat_next(&hb, step);
svc_rrd_cleanup_obsolete_charts_from_all_hosts();
svc_rrdhost_cleanup_orphan_hosts(localhost);
}
netdata_thread_cleanup_pop(1);
return NULL;
}
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