shell脚本监控mysql主从状态

#!/bin/bash#define mysql variablemysql_user="root"mysql_pass="123456"email_addr="slave@jb51.net"mysql_status=`netstat -nl | awk 'NR>2{if ($4 ~ /.*:3306/) {print "Yes";exit 0}}'`if [ "$mysql_status" == "Yes" ];then        slave_status=`mysql -u${mysql_user} -p${mysql_pass} -e"show slave status\G" | grep "Running" | awk '{if ($2 != "Yes") {print "No";exit 1}}'`        if [ "$slave_status" == "No" ];then                echo "slave is not working!"                [ ! -f "/tmp/slave" ] && echo "Slave is not working!" | mail -s "Warn!MySQL Slave is not working" ${email_addr}                touch /tmp/slave        else                echo "slave is working."                [ -f "/tmp/slave" ] && rm -f /tmp/slave        fi        [ -f "/tmp/mysql_down" ] && rm -f /tmp/mysql_downelse        [ ! -f "/tmp/mysql_down" ] && echo "Mysql Server is down!" | mail -s "Warn!MySQL server is down!" ${email_addr}        touch /tmp/mysql_downfi