Monitor the MySQL process script, the failure is restarted, if unable to start the email notification

Source: Internet
Author: User

Function:

Monitor the MySQL process, the failure is restarted, if unable to start the email notification

The code is as follows:

The code is as follows Copy Code


#!/bin/bash
#/usr/bin/nmap localhost | grep 3306
#lsof-i:3306
mysqlport= ' Netstat-na|grep ' LISTEN "|grep" 3306″|awk-f[: ""]+ ' {print $} '

function Checkmysqlstatus () {
/usr/bin/mysql-uroot-p11111–connect_timeout=5-e "show databases;" &>/dev/null 2>&1
If [$?-ne 0]
Then
Restartmysqlservice
If ["$MYSQLPORT" = "3306"];then
echo "MySQL Restart successful ..."
Else
echo "MySQL Restart failure ..."
echo "Server: $MYSQLIP MySQL is down, please try to restart MySQL by manual!" >/var/log/mysqlerr
#mail-S "warn! Server: $MYSQLIP MySQL are down "admin@yourdomain.com </var/log/mysqlerr
Fi
Else
echo "MySQL is running ..."
Fi
}

function Restartmysqlservice () {
echo "Try to restart the MySQL service ..."
/bin/ps aux |grep mysql |grep-v grep | awk ' {print $} ' | Xargs kill-9
Service MySQL Start
}

If ["$MYSQLPORT" = "3306"]
Then
Checkmysqlstatus
Else
Restartmysqlservice
Fi

Recommended to run once every 10 minutes

The code is as follows Copy Code
*/10 * * * * root/bin/sh/root/mysql_status.sh

Specific principle:

1 The first detection of MySQL 3306 port is normal;

2 Use the account to connect the database and execute show databases command;

3 If the above two points can work correctly means that the database is running normally.

In addition, there are three different ways to monitor MYAQL ports:

  code is as follows copy code

1)/usr/bin /nmap localhost | grep 3306

2) lsof-i:3306

3) netstat-na|grep "LISTEN" |grep "3306″|awk-f[:" "]+ ' {print $} '

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