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/*
** Zabbix
** Copyright (C) 2001-2022 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 "dbsyncer.h"
#include "log.h"
#include "zbxnix.h"
#include "zbxself.h"
#include "zbxtime.h"
#include "zbxcachehistory.h"
#include "zbxexport.h"
extern int CONFIG_HISTSYNCER_FREQUENCY;
extern unsigned char program_type;
static sigset_t orig_mask;
/******************************************************************************
* *
* Purpose: flush timer queue to the database *
* *
******************************************************************************/
static void zbx_db_flush_timer_queue(void)
{
int i;
zbx_vector_ptr_t persistent_timers;
zbx_db_insert_t db_insert;
zbx_vector_ptr_create(&persistent_timers);
zbx_dc_clear_timer_queue(&persistent_timers);
if (0 != persistent_timers.values_num)
{
zbx_db_insert_prepare(&db_insert, "trigger_queue", "trigger_queueid", "objectid", "type", "clock", "ns", NULL);
for (i = 0; i < persistent_timers.values_num; i++)
{
zbx_trigger_timer_t *timer = (zbx_trigger_timer_t *)persistent_timers.values[i];
zbx_db_insert_add_values(&db_insert, __UINT64_C(0), timer->objectid, timer->type,
timer->eval_ts.sec, timer->eval_ts.ns);
}
zbx_dc_free_timers(&persistent_timers);
zbx_db_insert_autoincrement(&db_insert, "trigger_queueid");
zbx_db_insert_execute(&db_insert);
zbx_db_insert_clean(&db_insert);
}
zbx_vector_ptr_destroy(&persistent_timers);
}
static void db_trigger_queue_cleanup(void)
{
DBexecute("delete from trigger_queue");
zbx_db_trigger_queue_unlock();
}
/******************************************************************************
* *
* Purpose: periodically synchronises data in memory cache with database *
* *
* Comments: never returns *
* *
******************************************************************************/
ZBX_THREAD_ENTRY(dbsyncer_thread, args)
{
int sleeptime = -1, total_values_num = 0, values_num, more, total_triggers_num = 0,
triggers_num;
double sec, total_sec = 0.0;
time_t last_stat_time;
char *stats = NULL;
const char *process_name;
size_t stats_alloc = 0, stats_offset = 0;
const zbx_thread_info_t *info = &((zbx_thread_args_t *)args)->info;
int server_num = ((zbx_thread_args_t *)args)->info.server_num;
int process_num = ((zbx_thread_args_t *)args)->info.process_num;
unsigned char process_type = ((zbx_thread_args_t *)args)->info.process_type;
zabbix_log(LOG_LEVEL_INFORMATION, "%s #%d started [%s #%d]", get_program_type_string(program_type), server_num,
(process_name = get_process_type_string(process_type)), process_num);
zbx_update_selfmon_counter(info, ZBX_PROCESS_STATE_BUSY);
#define STAT_INTERVAL 5 /* if a process is busy and does not sleep then update status not faster than */
/* once in STAT_INTERVAL seconds */
zbx_setproctitle("%s #%d [connecting to the database]", process_name, process_num);
last_stat_time = time(NULL);
zbx_strcpy_alloc(&stats, &stats_alloc, &stats_offset, "started");
/* database APIs might not handle signals correctly and hang, block signals to avoid hanging */
zbx_block_signals(&orig_mask);
DBconnect(ZBX_DB_CONNECT_NORMAL);
if (1 == process_num)
db_trigger_queue_cleanup();
zbx_unblock_signals(&orig_mask);
if (SUCCEED == zbx_is_export_enabled(ZBX_FLAG_EXPTYPE_HISTORY))
zbx_history_export_init("history-syncer", process_num);
if (SUCCEED == zbx_is_export_enabled(ZBX_FLAG_EXPTYPE_TRENDS))
zbx_trends_export_init("history-syncer", process_num);
if (SUCCEED == zbx_is_export_enabled(ZBX_FLAG_EXPTYPE_EVENTS))
zbx_problems_export_init("history-syncer", process_num);
for (;;)
{
sec = zbx_time();
if (0 != sleeptime)
zbx_setproctitle("%s #%d [%s, syncing history]", process_name, process_num, stats);
/* clear timer trigger queue to avoid processing time triggers at exit */
if (!ZBX_IS_RUNNING())
zbx_log_sync_history_cache_progress();
/* database APIs might not handle signals correctly and hang, block signals to avoid hanging */
zbx_block_signals(&orig_mask);
zbx_sync_history_cache(&values_num, &triggers_num, &more);
if (!ZBX_IS_RUNNING() && SUCCEED != zbx_db_trigger_queue_locked())
zbx_db_flush_timer_queue();
zbx_unblock_signals(&orig_mask);
total_values_num += values_num;
total_triggers_num += triggers_num;
total_sec += zbx_time() - sec;
sleeptime = (ZBX_SYNC_MORE == more ? 0 : CONFIG_HISTSYNCER_FREQUENCY);
if (0 != sleeptime || STAT_INTERVAL <= time(NULL) - last_stat_time)
{
stats_offset = 0;
zbx_snprintf_alloc(&stats, &stats_alloc, &stats_offset, "processed %d values", total_values_num);
if (0 != (program_type & ZBX_PROGRAM_TYPE_SERVER))
{
zbx_snprintf_alloc(&stats, &stats_alloc, &stats_offset, ", %d triggers",
total_triggers_num);
}
zbx_snprintf_alloc(&stats, &stats_alloc, &stats_offset, " in " ZBX_FS_DBL " sec", total_sec);
if (0 == sleeptime)
zbx_setproctitle("%s #%d [%s, syncing history]", process_name, process_num, stats);
else
zbx_setproctitle("%s #%d [%s, idle %d sec]", process_name, process_num, stats, sleeptime);
total_values_num = 0;
total_triggers_num = 0;
total_sec = 0.0;
last_stat_time = time(NULL);
}
if (ZBX_SYNC_MORE == more)
continue;
if (!ZBX_IS_RUNNING())
break;
zbx_sleep_loop(info, sleeptime);
}
/* database APIs might not handle signals correctly and hang, block signals to avoid hanging */
zbx_block_signals(&orig_mask);
if (SUCCEED != zbx_db_trigger_queue_locked())
zbx_db_flush_timer_queue();
DBclose();
zbx_unblock_signals(&orig_mask);
zbx_log_sync_history_cache_progress();
zbx_free(stats);
exit(EXIT_SUCCESS);
#undef STAT_INTERVAL
}
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