shell之服务异常监测案例
例题一：web服务器nginx脚本服务监控#cat jiance_ng.sh
#!/bin/bash
if ! ss -lntup|grep ginx &>/dev/null
then
/etc/init.d/nginx start
echo "nginx dead,but it's OK"|mail -s "whw11" 11392XXX@qq.com
fi
http_num=$(curl -I www.oldboyedu.com -s -w %{http_code} -o /dev/null)
if [ ${http_num} -ne 200 ];then
/etc/init.d/nginx start
echo "nginx dead,but it's OK"|mail -s "whw11" 11392XXX@qq.com
fi
例题二：mysql服务器服务监控
# cat jiance_db.sh
#!/bin/bash
if ! ps -ef|grep ysqld &>/dev/null
then
systemctl start mariadb.service &>/dev/null
echo "mysql dead,but it is OK"|mail -s "whw111" 1139210923@qq.com
fi
例题三：memcache缓存服务器监控
[*]# cat jiance_mem2.sh**** #!/bin/bash
port_status=$(ss -lntup|grep 11211|wc -l)
key1="oldboy0987"
printf "set key011 0 0 10\r\n${key1}\r\n"|nc 10.0.0.21 11211 &>/dev/null
key2=$(printf "get key011\r\n"|nc 10.0.0.21 11211|sed -n '2p'|tr -d '\r')
if [ $port_status -eq 0 ];then
systemctl stop memcached.service
systemctl start memcached.service
if ! [ ${key1} == ${key2} ];then
systemctl restart memcached.service
echo "memcache dead,but it's OK"|mail -s "whw11" 1139210923@qq.com
fi
fi
例题四：打印选择菜单，按照选择一键安装不同的Web服务****
#cat yijian.sh
#!/bin/bash
cat /dev/null;then
killall rsync
sleep 3
action "rsync stop" /bin/true
else
echo "rsync是停止状态"
fi
;;
restart)
if ss -lntup|grep rsync &>/dev/null;then
pkill -f rsync
rsync --daemon
action "rsync stop" /bin/true
action "rsync start" /bin/true
else
rsync --daemon
action "rsync stop" /bin/false
action "rsync start" /bin/true
fi
;;
*)
echo "输入指令有误:(start|stop|restart)"
esac
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