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/*
** ZABBIX
** Copyright (C) 2000-2005 SIA Zabbix
**
** 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., 675 Mass Ave, Cambridge, MA 02139, USA.
**/
#include "common.h"
#include "cfg.h"
#include "db.h"
#include "zbxdb.h"
#include "log.h"
#include "zlog.h"
#include "../alerter/alerter.h"
#include "zlog.h"
#include "watchdog.h"
#define ZBX_RECIPIENT struct zbx_recipient_t
ZBX_RECIPIENT
{
DB_ALERT alert;
DB_MEDIATYPE mediatype;
};
#define ZBX_MAX_RECIPIENTS 32
ZBX_RECIPIENT recipients[ZBX_MAX_RECIPIENTS];
static int num = 0;
static int lastsent = 0;
/******************************************************************************
* *
* Function: send_alerts *
* *
* Purpose: send warning message to all interested *
* *
* Parameters: *
* *
* Return value: *
* *
* Author: Alexei Vladishev *
* *
* Comments: *
* *
******************************************************************************/
static void send_alerts()
{
int i,now;
char error[MAX_STRING_LEN];
now = time(NULL);
if(now>lastsent+900)
{
for(i=0;i<num;i++)
{
execute_action(&recipients[i].alert,&recipients[i].mediatype, error, sizeof(error));
}
lastsent = now;
}
}
/******************************************************************************
* *
* Function: init_config *
* *
* Purpose: init list of medias to send notifications in case if DB is down *
* *
* Parameters: *
* *
* Return value: *
* *
* Author: Alexei Vladishev *
* *
* Comments: *
* *
******************************************************************************/
static void init_config()
{
DB_RESULT result;
DB_ROW row;
zabbix_log(LOG_LEVEL_DEBUG, "In init_config()");
result = DBselect("select mt.mediatypeid, mt.type, mt.description, mt.smtp_server, mt.smtp_helo, mt.smtp_email, mt.exec_path, mt.gsm_modem, mt.username, mt.passwd, m.mediaid,m.userid,m.mediatypeid,m.sendto,m.severity,m.period from media m, users_groups u, config c,media_type mt where m.userid=u.userid and u.usrgrpid=c.alert_usrgrpid and m.mediatypeid=mt.mediatypeid and m.active=%d",
MEDIA_STATUS_ACTIVE);
while((row=DBfetch(result)))
{
if(num>=ZBX_MAX_RECIPIENTS) break;
memset(&recipients[num].mediatype, 0, sizeof(DB_MEDIATYPE));
memset(&recipients[num].alert, 0, sizeof(DB_ALERT));
ZBX_STR2UINT64(recipients[num].mediatype.mediatypeid,row[0]);
recipients[num].mediatype.type=atoi(row[1]);
recipients[num].mediatype.description=strdup(row[2]);
recipients[num].mediatype.smtp_server=strdup(row[3]);
recipients[num].mediatype.smtp_helo=strdup(row[4]);
recipients[num].mediatype.smtp_email=strdup(row[5]);
recipients[num].mediatype.exec_path=strdup(row[6]);
recipients[num].mediatype.gsm_modem=strdup(row[7]);
recipients[num].mediatype.username=strdup(row[8]);
recipients[num].mediatype.passwd=strdup(row[9]);
recipients[num].alert.sendto=strdup(row[13]);
recipients[num].alert.subject=strdup("ZABBIX database is down.");
recipients[num].alert.message=strdup("ZABBIX database is down.");
num++;
}
DBfree_result(result);
}
/******************************************************************************
* *
* Function: ping_database *
* *
* Purpose: check availability of database *
* *
* Parameters: *
* *
* Return value: *
* *
* Author: Alexei Vladishev *
* *
* Comments: *
* *
******************************************************************************/
static void ping_database()
{
zabbix_log(LOG_LEVEL_DEBUG, "In ping_database()");
/* This is test SQL query, it does nothing */
if(DBping() == FAIL)
{
zabbix_log(LOG_LEVEL_WARNING, "Watchdog: Database is down");
send_alerts();
}
else
{
zabbix_log(LOG_LEVEL_DEBUG, "Watchdog: Database is up");
}
}
/******************************************************************************
* *
* Function: main_watchdog_loop *
* *
* Purpose: periodically checks availability of database and alerts admin if *
* down *
* *
* Parameters: *
* *
* Return value: *
* *
* Author: Alexei Vladishev *
* *
* Comments: check database availability every 60 seconds (hardcoded) *
* *
******************************************************************************/
void main_watchdog_loop()
{
/* Disable writing to database in zabbix_syslog() */
CONFIG_ENABLE_LOG = 0;
DBconnect(ZBX_DB_CONNECT_NORMAL);
init_config();
for(;;)
{
ping_database();
sleep(60);
}
/* We will never reach this point */
DBclose();
}
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