监控MySQL服务是否正常,通常的思路为:检查3306端口是否启动,ps查看mysqld进程是否启动,命令行登录mysql执行语句返回结果,php或jsp程序检测(需要开发人员开发程序)等等; 方法1:监听3306端口 #!/bin/bash #written by mofansheng@2015-10-15 port=`netstat -nlt|grep 3306|wc -l` if [ $port -ne 1 ] then /etc/init.d/mysqld start else echo "MySQL is running" fi 方法2:查看mysqld进程 注意注意:如果使用进程过滤的话,脚本名称如果里面包含mysql的话,脚本执行有坑,切记!!!因为会把脚本也grep了一次,导致结果不准确; [root@localhost baby]# cat check_mysql.sh #!/bin/bash #written by mofansheng@2015-10-15 process=`ps -ef |grep mysql|grep -v grep |wc -l` if [ $process -ne 2 ] then /etc/init.d/mysqld start else echo "MySQL is running" fi 执行结果如下: [root@localhost baby]# sh check_mysql.sh Starting MySQL SUCCESS! 改名之后执行为正常结果: [root@localhost baby]# mv check_mysql.sh check_db.sh [root@localhost baby]# sh check_db.sh MySQL is running 方法3:双保险,进程和端口都成功才算mysql服务正常 #!/bin/bash #written by mofansheng@2015-10-15 port=`netstat -nlt|grep 3306|wc -l` process=`ps -ef |grep mysql|grep -v grep |wc -l` if [ $port -eq 1 ] && [ $process -eq 2 ] then echo "MySQL is running" else /etc/init.d/mysqld start fi 4:使用客户端登录mysql执行命令,查看返回结果测试服务是否启动,理论上此方法最可靠。 [root@localhost baby]# cat check_db_client.sh #!/bin/bash #written by mofansheng@2015-10-15 mysql -uroot -p123456 -e "select version();" &>/dev/null if [ $? -ne 0 ] then /etc/init.d/mysqld start else echo "MySQL is running" fi 执行结果如下: [root@localhost baby]# sh check_db_client.sh MySQL is running (责任编辑:IT) |