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/*
** Zabbix
** Copyright (C) 2001-2021 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program 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 General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
#include "common.h"
#include "db.h"
#include "daemon.h"
#include "zbxself.h"
#include "log.h"
#include "dbconfig.h"
#include "dbcache.h"
extern int CONFIG_CONFSYNCER_FREQUENCY;
extern ZBX_THREAD_LOCAL unsigned char process_type;
extern unsigned char program_type;
extern ZBX_THREAD_LOCAL int server_num, process_num;
static volatile sig_atomic_t secrets_reload;
static void zbx_dbconfig_sigusr_handler(int flags)
{
int msg;
/* it is assumed that only one signal is used at a time, any subsequent signals are ignored */
if (ZBX_RTC_CONFIG_CACHE_RELOAD == (msg = ZBX_RTC_GET_MSG(flags)))
{
if (0 < zbx_sleep_get_remainder())
{
zabbix_log(LOG_LEVEL_WARNING, "forced reloading of the configuration cache");
zbx_wakeup();
}
else
zabbix_log(LOG_LEVEL_WARNING, "configuration cache reloading is already in progress");
}
else if (ZBX_RTC_SECRETS_RELOAD == msg)
{
if (0 < zbx_sleep_get_remainder())
{
secrets_reload = 1;
zabbix_log(LOG_LEVEL_WARNING, "forced reloading of the secrets");
zbx_wakeup();
}
else
zabbix_log(LOG_LEVEL_WARNING, "configuration cache reloading is already in progress");
}
}
/******************************************************************************
* *
* Function: main_dbconfig_loop *
* *
* Purpose: periodically synchronises database data with memory cache *
* *
* Parameters: *
* *
* Return value: *
* *
* Author: Alexander Vladishev *
* *
* Comments: never returns *
* *
******************************************************************************/
ZBX_THREAD_ENTRY(dbconfig_thread, args)
{
double sec = 0.0;
int nextcheck = 0;
process_type = ((zbx_thread_args_t *)args)->process_type;
server_num = ((zbx_thread_args_t *)args)->server_num;
process_num = ((zbx_thread_args_t *)args)->process_num;
zabbix_log(LOG_LEVEL_INFORMATION, "%s #%d started [%s #%d]", get_program_type_string(program_type),
server_num, get_process_type_string(process_type), process_num);
update_selfmon_counter(ZBX_PROCESS_STATE_BUSY);
zbx_set_sigusr_handler(zbx_dbconfig_sigusr_handler);
zbx_setproctitle("%s [connecting to the database]", get_process_type_string(process_type));
DBconnect(ZBX_DB_CONNECT_NORMAL);
sec = zbx_time();
zbx_setproctitle("%s [syncing configuration]", get_process_type_string(process_type));
DCsync_configuration(ZBX_DBSYNC_INIT, NULL);
zbx_setproctitle("%s [synced configuration in " ZBX_FS_DBL " sec, idle %d sec]",
get_process_type_string(process_type), (sec = zbx_time() - sec), CONFIG_CONFSYNCER_FREQUENCY);
zbx_sleep_loop(CONFIG_CONFSYNCER_FREQUENCY);
while (ZBX_IS_RUNNING())
{
zbx_setproctitle("%s [synced configuration in " ZBX_FS_DBL " sec, syncing configuration]",
get_process_type_string(process_type), sec);
sec = zbx_time();
zbx_update_env(sec);
if (1 == secrets_reload)
{
DCsync_configuration(ZBX_SYNC_SECRETS, NULL);
secrets_reload = 0;
}
else
{
DCsync_configuration(ZBX_DBSYNC_UPDATE, NULL);
DCupdate_interfaces_availability();
nextcheck = time(NULL) + CONFIG_CONFSYNCER_FREQUENCY;
}
sec = zbx_time() - sec;
zbx_setproctitle("%s [synced configuration in " ZBX_FS_DBL " sec, idle %d sec]",
get_process_type_string(process_type), sec, CONFIG_CONFSYNCER_FREQUENCY);
zbx_sleep_loop(nextcheck - time(NULL));
}
zbx_setproctitle("%s #%d [terminated]", get_process_type_string(process_type), process_num);
while (1)
zbx_sleep(SEC_PER_MIN);
}
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