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/*
* Copyright (c) 2023 László Várady <laszlo.varady93@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#include "healthcheck-stats.h"
#include "healthcheck.h"
#include "stats/stats-cluster-single.h"
#include "stats/stats-registry.h"
#include "stats/stats-counter.h"
#include "apphook.h"
#include "cfg.h"
#include "mainloop.h"
#include "timeutils/misc.h"
#include <iv.h>
typedef struct _HealthCheckStats
{
HealthCheckStatsOptions options;
struct iv_timer timer;
StatsCounterItem *io_worker_latency;
StatsCounterItem *mainloop_io_worker_roundtrip_latency;
} HealthCheckStats;
static HealthCheckStats healthcheck_stats;
static void
healthcheck_stats_update(HealthCheckResult result, gpointer c)
{
HealthCheckStats *self = (HealthCheckStats *) c;
stats_counter_set(self->io_worker_latency, result.io_worker_latency);
stats_counter_set(self->mainloop_io_worker_roundtrip_latency, result.mainloop_io_worker_roundtrip_latency);
}
static void
healthcheck_stats_timer_start(HealthCheckStats *self)
{
iv_validate_now();
self->timer.expires = iv_now;
timespec_add_msec(&self->timer.expires, self->options.freq * 1000);
iv_timer_register(&self->timer);
}
static void
healthcheck_stats_timer_stop(HealthCheckStats *self)
{
if (self->timer.handler && iv_timer_registered(&self->timer))
iv_timer_unregister(&self->timer);
}
static void
healthcheck_stats_run(gpointer c)
{
HealthCheckStats *self = (HealthCheckStats *) c;
HealthCheck *hc = healthcheck_new();
healthcheck_run(hc, healthcheck_stats_update, self);
healthcheck_unref(hc);
if (self->options.freq > 0)
healthcheck_stats_timer_start(self);
}
static void
_register_counters(HealthCheckStats *self)
{
StatsClusterKey sc_key_io_worker_latency, sc_key_mainloop_iow_rt_latency;
stats_cluster_single_key_set(&sc_key_io_worker_latency, "io_worker_latency_seconds", NULL, 0);
stats_cluster_single_key_add_unit(&sc_key_io_worker_latency, SCU_NANOSECONDS);
stats_cluster_single_key_set(&sc_key_mainloop_iow_rt_latency,
"mainloop_io_worker_roundtrip_latency_seconds", NULL, 0);
stats_cluster_single_key_add_unit(&sc_key_mainloop_iow_rt_latency, SCU_NANOSECONDS);
stats_lock();
stats_register_counter(1, &sc_key_io_worker_latency, SC_TYPE_SINGLE_VALUE, &self->io_worker_latency);
stats_register_counter(1, &sc_key_mainloop_iow_rt_latency, SC_TYPE_SINGLE_VALUE,
&self->mainloop_io_worker_roundtrip_latency);
stats_unlock();
}
static void
_unregister_counters(HealthCheckStats *self)
{
StatsClusterKey sc_key_io_worker_latency, sc_key_mainloop_iow_rt_latency;
stats_cluster_single_key_set(&sc_key_io_worker_latency, "io_worker_latency_seconds", NULL, 0);
stats_cluster_single_key_set(&sc_key_mainloop_iow_rt_latency,
"mainloop_io_worker_roundtrip_latency_seconds", NULL, 0);
stats_lock();
stats_unregister_counter(&sc_key_io_worker_latency, SC_TYPE_SINGLE_VALUE, &self->io_worker_latency);
stats_unregister_counter(&sc_key_mainloop_iow_rt_latency, SC_TYPE_SINGLE_VALUE,
&self->mainloop_io_worker_roundtrip_latency);
stats_unlock();
}
void
healthcheck_stats_init(HealthCheckStatsOptions *options)
{
healthcheck_stats.options = *options;
_register_counters(&healthcheck_stats);
healthcheck_stats_timer_stop(&healthcheck_stats);
IV_TIMER_INIT(&healthcheck_stats.timer);
healthcheck_stats.timer.handler = healthcheck_stats_run;
healthcheck_stats.timer.cookie = &healthcheck_stats;
if (healthcheck_stats.mainloop_io_worker_roundtrip_latency)
healthcheck_stats_run(&healthcheck_stats);
}
void
healthcheck_stats_deinit(void)
{
healthcheck_stats_timer_stop(&healthcheck_stats);
_unregister_counters(&healthcheck_stats);
}
static inline void
_init(gint type, gpointer c)
{
MainLoop *main_loop = main_loop_get_instance();
GlobalConfig *cfg = main_loop_get_current_config(main_loop);
if (!cfg)
return;
healthcheck_stats_init(&cfg->healthcheck_options);
}
static inline void
_deinit(gint type, gpointer c)
{
healthcheck_stats_deinit();
}
void
healthcheck_stats_global_init(void)
{
register_application_hook(AH_CONFIG_CHANGED, _init, NULL, AHM_RUN_REPEAT);
register_application_hook(AH_CONFIG_STOPPED, _deinit, NULL, AHM_RUN_REPEAT);
}
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