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#!/usr/bin/env bash
## Matthew Montgomery ##
## [email]mmontgomery@mysql.com[/email] ##
repeat_alert_interval=15 # minutes
lock_file=/tmp/slave_alert.lck
active=yes
## Check if alert is already sent ##
function check_alert_lock () {
if [ -f $lock_file ] ; then
current_file=`find $lock_file -cmin -$repeat_alert_interval`
if [ -n "$current_file" ] ; then
# echo "Current lock file found"
return 1
else
# echo "Expired lock file found"
return 2
fi
else
return 0
fi
}
## Find the location of the mysql.sock file ##
function check_for_socket () {
if [ -z $socket ] ; then
if [ -S /var/lib/mysql/mysql.sock ] ; then
socket=/var/lib/mysql/mysql.sock
elif [ -S /tmp/mysql.sock ] ; then
socket=/tmp/mysql.sock
else
ps_socket=`netstat -ln | egrep "mysql(d)?\.sock" | awk '{ print $9 }'`
if [ "$ps_socket" ] ; then
socket=$ps_socket
fi
fi
fi
if [ -S "$socket" ] ; then
echo UP > /dev/null
else
echo "No valid socket file "$socket" found!"
echo "mysqld is not running or it is installed in a custom location"
echo "Please set the $socket variable at the top of this script."
exit 1
fi
}
check_for_socket
Slave_IO_Running=`mysql -Bse "show slave status\G" | grep Slave_IO_Running | awk '{ print $2 }'`
Slave_SQL_Running=`mysql -Bse "show slave status\G" | grep Slave_SQL_Running | awk '{ print $2 }'`
Last_error=`mysql -Bse "show slave status\G" | grep Last_error | awk -F \: '{ print $2 }'`
if [ -z $Slave_IO_Running -o -z $Slave_SQL_Running ] ; then
echo "Replication is not configured or you do not have the required access to MySQL"
exit
fi
if [ $Slave_IO_Running == 'Yes' ] && [ $Slave_SQL_Running == 'Yes' ] ; then
if [ -f $lock_file ] ; then
rm $lock_file
echo "Replication slave is running"
echo "Removed Alert Lock"
fi
exit 0
elif [ $Slave_SQL_Running == 'No' ] ; then
if [ $active == 'yes' ] ; then
check_alert_lock
if [ $? = 1 ] ; then
## Current Lock ##
echo "up" > /dev/null
else
## Stale/No Lock ##
touch $lock_file
echo "SQL thread not running on server `hostname -s`!"
echo "Last Error:" $Last_error
fi
fi
exit 1
elif [ $Slave_IO_Running == 'No' ] ; then
if [ $active == 'yes' ] ; then
check_alert_lock
if [ $? = 1 ] ; then
## Current Lock ##
echo "up" > /dev/null
else
## Stale/No Lock ##
touch $lock_file
echo "LOG IO thread not running on server `hostname -s`!"
echo "Last Error:" $Last_error
fi
fi
exit 1
else
if [ $active == 'yes' ] ; then
check_alert_lock
if [ $? = 1 ] ; then
## Current Lock ##
echo "up" > /dev/null
else
## Stale/No Lock ##
touch $lock_file
echo "Unexpected Error!"
echo "Check Your permissions!"
fi
fi
exit 2
fi
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#!/bin/bash
# 译者:龙力勤
# 最新更新:2009-08-16
# 出自懒人运维:
# Eamil:longkaty@sina.com
# 用途:mysql监控
# 描述:shell脚本监控mysql服务，并在服务停止时自动开启
# 更多关于此脚本的讨论，请参考:/2009/08/821.html
# 用法:./scriptname.sh
# mysql root/admin username
MUSER="root"
# mysql admin/root password
MPASS="SET-ROOT-PASSWORD"
# mysql server hostname
MHOST="localhost"
#Shell script to start MySQL server i.e. path to MySQL daemon start/stop script.
# Debain uses following script, need to setup this according to your UNIX/Linux/BSD OS.
MSTART="/etc/init.d/mysql start"
# Email ID to send notification
EMAILID="notification@somewhere-corp.com"
# path to mail program
MAILCMD="$(which mail)"
# path mysqladmin
MADMIN="$(which mysqladmin)"
#### DO NOT CHANGE anything BELOW ####
MAILMESSAGE="/tmp/mysql.fail.$$"
# see if MySQL server is alive or not
# 2&1 could be better but i would like to keep it simple and easy to
# understand stuff :)
$MADMIN -h $MHOST -u $MUSER -p${MPASS} ping 2>/dev/null 1>/dev/null
if [ $? -ne 0 ]; then
echo "" >$MAILMESSAGE
echo "Error: MySQL Server is not running/responding ping request">>$MAILMESSAGE
echo "Hostname: $(hostname)" >>$MAILMESSAGE
echo "Date & Time: $(date)" >>$MAILMESSAGE
# try to start mysql
$MSTART>/dev/null
# see if it is started or not
o=$(ps cax | grep -c ' mysqld$')
if [ $o -eq 1 ]; then
sMess="MySQL Server MySQL server successfully restarted"
else
sMess="MySQL server FAILED to restart"
fi
# Email status too
echo "Current Status: $sMess" >>$MAILMESSAGE
echo "" >>$MAILMESSAGE
echo "*** This email generated by $(basename $0) shell script ***" >>$MAILMESSAGE
echo "*** Please don't reply this email, this is just notification email ***" >>$MAILMESSAGE
# send email
$MAILCMD -s "MySQL server" $EMAILID < $MAILMESSAGE
else # MySQL is running :) and do nothing
:
fi
# remove file
rm -f $MAILMESSAGE
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#!/bin/sh
#
# created by yejr, 2007/06/03
#
# 本脚本用于监控MySQL 复制是否运行，并且根据具体的错误代码自动判断是否忽略
#
now=`date +"%Y%m%d%H%M%S"`
StatFile="./slave_status.$now"
echo "show slave status\G" | mysql -uroot -pmypasswd > $StatFile
#取得 io_thread, sql_thread, last_errno 的状态
IoStat=`cat $StatFile | grep Slave_IO_Running | awk '{print $2}'`
SqlStat=`cat $StatFile | grep Slave_SQL_Running | awk '{ print $2}'`
Errno=`cat $StatFile | grep Last_Errno | awk '{print $2}'`
Behind=`cat $StatFile | grep Seconds_Behind_Master | awk '{print $2}'`
#IoStat=`cat $StatFile | head -n 12 | tail -n 1 | awk '{print $2}'`
#SqlStat=`cat $StatFile | head -n 13 | tail -n 1 | awk '{print $2}'`
#Errno=`cat $StatFile | head -n 20 | tail -n 1 | awk '{print $2}'`
if [ $IoStat = 'No' ] || [ $SqlStat = 'No' ] ; then
echo "[chkslave]"
date
#如果错误代码为 0，则可能是因为网络等原因导致复制中断，直接重新启动复制即可
if [ "$Errno" -eq 0 ] ; then
echo "start slave io_thread; start slave sql_thread;" | mysql -uroot -pmypasswd
echo "start slave io_thread; start slave sql_thread;"
#如果是一些不是很要紧的错误代码，也可以直接略过
elif [ "$Errno" -eq 1007 ] || [ "$Errno" -eq 1053 ] || [ "$Errno" -eq 1062 ] || [ "$Errno" -eq 1213 ] \
|| [ "$Errno" -eq 1158 ] || [ "$Errno" -eq 1159 ] || [ "$Errno" -eq 1008 ] ; then
echo "stop slave; set global sql_slave_skip_counter=1; slave start;" | mysql -uroot -pmypasswd
echo "stop slave; set global sql_slave_skip_counter=1; slave start;"
else
echo `date` "slave is down!!!"
fi
# 远远落后于 master
if [ $Behind -gt 200 ] ; then
echo `date` "slave is behind master $Behind seconds!!!"
fi
#删除临时状态文件
rm -f $StatFile
echo "[/chkslave]"
fi
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