Linux监控apache脚本

监控apache脚本：
1、每十分钟检查apache是否正常运行
分析：进程在运行如何判断
1）lockfile是否存在
2）pid是在后台存在
3）能否正常访问页面

2、如果apache运行不正常（进程死亡、页面访问也不正常等情况），
需要脚本能够通过重启apache进程来恢复正常。
分析：
1）先恢复后报警
2）如何恢复
3）如何报警

3、当apache故障时能通过邮件及短信报警，当apache故障恢复后能够通知管理员
1）重新检查apache是否正常
2）如果正常发信息告诉管理员已经自动恢复成功
3）如果apache还是不正常，发信息告知管理上线手工修复

#!/bin/bash

if [ -f /var/lock/subsys/httpd ]
then
        export pid=`cat /var/run/httpd/httpd.pid`
        ps -p $pid | grep httpd &> /dev/null
        REL1=$?
        elinks -dump http://localhost/ok.html &> /dev/null
        REL2=$?

        if [ 0 -eq $REL1 ] && [ 0 -eq $REL2  ]
        then
                        : 
        else
                        pkill -9 httpd
                        service httpd restart &> /dev/null
                        REL3=$?
                        echo "httpd is not OK" | mail -s "httpd is not ok" root@localhost
                        sleep 3s
 
                        if [ $REL3 -eq 0 ]
                        then
                                echo "httpd is recovered OK" |  mail -s "httpd is recovered ok" root@localhost
                        else
                                echo "httpd is recovered not OK,please login your server and recover by yourself" | mail -s "httpd is recovered not ok" root@localhost
                        fi
        fi
else
                        service httpd start &> /dev/null
                        REL4=$?
                        echo "httpd is not OK" | mail -s "httpd is not ok" root@localhost
 
                        sleep 3s
                        if [ $REL4 -eq 0 ]
                        then
                                echo "httpd is recovered OK" |  mail -s "httpd is recovered ok" root@localhost
                        else
                                echo "httpd is recovered not OK,please login your server and recover by yourself" | mail -s "httpd is recovered not ok" root@localhost
                        fi

fi

*/10 * * * * sh httpd.sh