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。
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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
[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 [ $? -ne 0 ];then
action “httpd is not running” /bin/false >/tmp/httpd.log
httpdctl restart >/dev/null 2>&1
action “httpd is restart” /bin/true >>/tmp/httpd.log
mail -s “`uname -n`’s httpd restarted at `(date)`” 31333741@qq.com
exit 1
fi
[root@oldboy-B scripts]# cat apachemon1
#!/bin/sh
#created by oldboy 20110523
#
. /etc/init.d/functions
HTTPPORTNUM=`netstat -lnt|grep 80|grep -v grep|wc -l`
HTTPPRONUM=`ps -ef|grep http|grep -v grep|wc -l`
wget –quiet –spider http://10.0.0.161/index.htm && RETVAL=$?
if [ $RETVAL -ne 0 ] || [ $HTTPPORTNUM -ne 1 ] || [ $HTTPPRONUM -lt 1 ] ;then
#if [ "$RETVAL" != "0" -o "$HTTPPORTNUM" != "1" -o "$HTTPPRONUM" \ 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
网页题目:Shell脚本习题:定时监控http服务的运行状态
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