監控Squid執行指令碼

因squid對多核伺服器支援不夠理想，所以在每台freebsd伺服器上（4核）開啟了3個squid

平穩的執行了一段時間，有一天客服反映網頁無法開啟，然後就對每台squid伺服器進行檢查，發現有台伺服器其中的乙個squid程序死掉了，重新啟動該squid，一切正常，為了及時發現squid程序故障並重啟squid，特寫了以下指令碼

定時器，每過10分鐘檢查一次，無限迴圈

vi /root/restart_squid.sh

#!/bin/sh

while true   

dosquid1_ip=`awk '/ifconfig_lo0_alias0/' /etc/rc.conf`

squid1num=`netstat -an | grep -c $squid1_ip`      

if [ $squid1num -lt 10 ] ; then   

/usr/local/etc/rc.d/squid1 start

/usr/local/etc/rc.d/squid1 restart

adddate=`date +%y-%m-%d`" "`date +%h:%m:%s`   

echo "$adddate squid_1 started" >> /var/restart_squid.log   

fisquid2_ip=`awk '/ifconfig_lo0_alias1/' /etc/rc.conf`

squid2num=`netstat -an | grep -c $squid2_ip`      

if [ $squid2num -lt 10 ] ; then   

/usr/local/etc/rc.d/squid2 start

/usr/local/etc/rc.d/squid2 restart

adddate=`date +%y-%m-%d`" "`date +%h:%m:%s`   

echo "$adddate squid_2 started" >> /var/restart_squid.log   

fisquid3_ip=`awk '/ifconfig_lo0_alias2/' /etc/rc.conf`

squid3num=`netstat -an | grep -c $squid3_ip`      

if [ $squid3num -lt 10 ] ; then   

/usr/local/etc/rc.d/squid3 start

/usr/local/etc/rc.d/squid3 restart

adddate=`date +%y-%m-%d`" "`date +%h:%m:%s`   

echo "$adddate squid_3 started" >> /var/restart_squid.log   

fisleep 10m

done

chmod +x /root/restart_squid.sh

/root/restart_squid.sh

也可以用計畫任務來實現

vi /root/restart_squid.sh

#!/bin/sh

squid1_ip=`awk '/ifconfig_lo0_alias0/' /etc/rc.conf`

squid1num=`netstat -an | grep -c $squid1_ip`      

if [ $squid1num -lt 10 ] ; then   

/usr/local/etc/rc.d/squid1 start

/usr/local/etc/rc.d/squid1 restart

adddate=`date +%y-%m-%d`" "`date +%h:%m:%s`   

echo "$adddate squid_1 started" >> /var/restart_squid.log   

fisquid2_ip=`awk '/ifconfig_lo0_alias1/' /etc/rc.conf`

squid2num=`netstat -an | grep -c $squid2_ip`      

if [ $squid2num -lt 10 ] ; then   

/usr/local/etc/rc.d/squid2 start

/usr/local/etc/rc.d/squid2 restart

adddate=`date +%y-%m-%d`" "`date +%h:%m:%s`   

echo "$adddate squid_2 started" >> /var/restart_squid.log   

fisquid3_ip=`awk '/ifconfig_lo0_alias2/' /etc/rc.conf`

squid3num=`netstat -an | grep -c $squid3_ip`      

if [ $squid3num -lt 10 ] ; then   

/usr/local/etc/rc.d/squid3 start

/usr/local/etc/rc.d/squid3 restart

adddate=`date +%y-%m-%d`" "`date +%h:%m:%s`   

echo "$adddate squid_3 started" >> /var/restart_squid.log    fi

chmod +x /root/restart_squid.sh

crontab -e

*/10 * * * * root /root/restart_squid.sh

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