shell脚本怎样实现定时监控http服务的运行状态
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注意：监控方法可以为端口、进程、URL模拟访问方式，或者三种方法综合。
说明：由于截止到目前仅讲了if语句，因此，就请大家用if语句来实现。
[root@oldboy-B scripts]# cat apachemon #!/bin/sh #created by oldboy 20110523 . /etc/init.d/functions HTTPPRONUM=`ps -ef|grep http|grep -v grep|wc -l` #if [ $HTTPPRONUM -lt 1 ];then if [[ $HTTPPRONUM -lt 1 ]];then action “httpd is not running” /bin/false action “httpd is not running” /bin/false >/tmp/httpd.log httpdctl restart >/dev/null 2>&1 action “httpd is restart” /bin/true mail -s “`uname -n`’s httpd restarted at `(date)`” 31333741@qq.com exit 1 else action “httpd is running” /bin/true exit 0 fi
[root@oldboy-B scripts]# apachemon httpd is running [确定] [root@oldboy-B scripts]# pkill httpd [root@oldboy-B scripts]# ps -ef |grep http |grep -v grep [root@oldboy-B scripts]# apachemon httpd is not running [失败] httpd is restart [确定] [root@oldboy-B scripts]# ps -ef|grep http|grep -v grep root 5845 1 1 15:59 ? 00:00:00 /usr/sbin/httpd -k restart apache 5852 5845 0 15:59 ? 00:00:00 /usr/sbin/httpd -k restart apache 5853 5845 0 15:59 ? 00:00:00 /usr/sbin/httpd -k restart apache 5854 5845 0 15:59 ? 00:00:00 /usr/sbin/httpd -k restart apache 5855 5845 0 15:59 ? 00:00:00 /usr/sbin/httpd -k restart apache 5856 5845 0 15:59 ? 00:00:00 /usr/sbin/httpd -k restart apache 5857 5845 0 15:59 ? 00:00:00 /usr/sbin/httpd -k restart apache 5858 5845 0 15:59 ? 00:00:00 /usr/sbin/httpd -k restart apache 5859 5845 0 15:59 ? 00:00:00 /usr/sbin/httpd -k restart
脚本 改进
[root@oldboy-B /]# echo oldboytest >/var/www/html/index.htm [root@oldboy-B /]# wget –quiet –spider http://10.0.0.161/index.htm [root@oldboy-B /]# echo $? 0 [root@oldboy-B /]# ll index.htm ls: index.htm: 没有那个文件或目录
[root@oldboy-B scripts]# cat apachemon1 #!/bin/sh #created by oldboy 20110523 . /etc/init.d/functions #HTTPPRONUM=`ps -ef|grep http|grep -v grep|wc -l` #=====>这个是基于http方式进行判断 wget –quiet –spider http://10.0.0.161/index.htm #=====>这个是基于WGET URL方式进行判断 if [ $? -ne 0 ];then action “httpd is not running” /bin/false >/tmp/httpd.log httpdctl restart >/dev/null 2>&1 action “httpd is restart” /bin/true >>/tmp/httpd.log mail -s “`uname -n`’s httpd restarted at `(date)`” mail@qq.com exit 1 else action “httpd is running” /bin/true exit 0 fi
真正使用时，有些输出是不需要的就去掉
[root@oldboy-B scripts]# cat apachemon1 #!/bin/sh #created by oldboy 20110523 # . /etc/init.d/functions wget –quiet –spider http://10.0.0.161/index.htm #=====>这个是基于WGET URL方式进行判断 if [ $? -ne 0 ];then action “httpd is not running” /bin/false >/tmp/httpd.log httpdctl restart >/dev/null 2>&1 action “httpd is restart” /bin/true >>/tmp/httpd.log mail -s “`uname -n`’s httpd restarted at `(date)`” 31333741@qq.com exit 1 fi
多条件判断的写法
[root@oldboy-B scripts]# cat apachemon1 #!/bin/sh #created by oldboy 20110523 # . /etc/init.d/functions HTTPPORTNUM=`netstat -lnt|grep 80|grep -v grep|wc -l` HTTPPRONUM=`ps -ef|grep http|grep -v grep|wc -l` wget –quiet –spider http://10.0.0.161/index.htm && RETVAL=$? if [ $RETVAL -ne 0 ] || [ $HTTPPORTNUM -ne 1 ] || [ $HTTPPRONUM -lt 1 ] ;then #if [ "$RETVAL" != "0" -o "$HTTPPORTNUM" != "1" -o "$HTTPPRONUM" \< "1" ] ;then action “httpd is not running” /bin/false action “httpd is not running” /bin/false >/tmp/httpd.log httpdctl restart >/dev/null 2>&1 action “httpd is restart” /bin/true mail -s “`uname -n`’s httpd restarted at `(date)`” 31333741@qq.com exit 1 else action “httpd is running” /bin/true exit 0 fi
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