我们有时候需要一些检查MySQL是否宕机，如果宕机了应自动重新启动应用并通知运维人员！
此脚本用来简单的实现MySQL宕机后自动重启并邮件通知运维，此为SHELL脚本，当然也有一些朋友喜欢用Python之类的实现，其原理是一样的！
这儿主要用到的是命令是mysqladmin ping

#!/bin/bash

# result=`/usr/bin/mysqladmin -u user -ppassword ping`

result=`/usr/bin/mysqladmin ping`

expected='mysqld is alive'

if [[ "$result" != "$expected" ]]

then

echo "It's dead - restart mysql"

# email subject

SUBJECT="[MYSQL ERROR] - Attempting to restart service"

# Email To ?

EMAIL="my@lvtao.net"

# Email text/message

EMAILMESSAGE="/tmp/emailmessage.txt"

echo "$result was received"> $EMAILMESSAGE

echo "when we were expected $expected" >>$EMAILMESSAGE

# send an email using /bin/mail

mail -s "$SUBJECT" "$EMAIL" < $EMAILMESSAGE

sudo /etc/init.d/mysql restart

fi

mysqladmin ping 如果mysql配置了有密码，就用 mysqladmin -u user -ppassword
然后定时执行这个脚本

*/5 * * * * /<path_to>/scripts/mysql.sh