shell监控脚本实例―监控mysql主从复制

#监控mysql 主从复制
cat chk_mysql_rep.sh
#!/bin/bash
#
#script_name:chk_mysql_rep.sh
#check mysql replication
#
#ssh root@xen "/usr/local/mysql/bin/mysql -uroot -pdongnan -e 'show slave status\G' -ss" | awk '/Running:/ {print $2}'
#Yes
#Yes
#
#variables
ssh=/usr/bin/ssh
sh_dir=/root/sh/
crondir=${sh_dir}crontab
source ${sh_dir}CONFIG
hosts="$DB_SLAVE_HOSTS"
#main
#主循环遍历机器 www.jb51.net
for HOST in $hosts;do
log=$crondir/log/mysql_replication_error.log
key=$($ssh root@$HOST "/usr/local/mysql/bin/mysql -uroot -pdongnan -e 'show slave status\G' -ss" | awk '/Running:/ {printf $2}')
    #无法连接的主机,跳过本次循环
    test -z "$key" && continue
    #返回结果真
    if [ "$key" == "YesYes" ];then
        #flag真,解除报警
        if [ -f "${crondir}/log/$HOST.mysql" ];then
            #sms
            #for mobile in $MOBILES;do
                #echo "$HOST replication ok" | /usr/local/bin/gammu --sendsms TEXT "$mobile" -unicode
            #done
            #mail
            for mail in $MAILS;do
                echo "$HOST replication ok" | mail -s "$HOST replication ok" $mail
            done
            #flag
            rm -f "${crondir}/log/$HOST.mysql"
        fi
    #返回结果假
    else  
check_date=$(date '+ %F %T')
        #flag假，报警
        if [ ! -f "${crondir}/log/$HOST.mysql" ];then
            #sms www.jb51.net
            #for mobile in $MOBILES;do
                #echo "$HOST replication error" | /usr/local/bin/gammu --sendsms TEXT "$mobile" -unicode
            #done
            #mail
            for mail in $MAILS;do
                echo "$HOST replication error" | mail -s "$HOST replication error" $mail
            done
            #flag
            echo "replication error" >"${crondir}/log/$HOST.mysql"
            #log
            echo "$check_date $HOST mysql replicaton error" >> $log
        fi
    fi
#
done
#