linux下监控进程的shell脚本一例

#!/bin/sh   
#设置环境变量 
export PYTHONPATH=/python/python_workspace/python_runapp:$PYTHONPATH 
#检测进程是否运行   
isRunning=$(ps -ef | grep "app" | grep -v "grep" | grep -v "vim")   
if [ "$isRunning" ] ; then  
    echo "app service was already started"  
else  
    echo "app service was not started"  
    echo "Starting service ..."  
    python /python/application/app.py > /dev/null 2>&1 &   
fi  
  
#检测站点是否可正常访问   
#$? 指访问状态 
#0 正常   
#urls='http://www.app.com http://www.jquerycn.cn' 
urls='http://www.app.com'  
for url in $urls   
    do  
        curl -sf $url   
        state=$?   
        if [ $state != 0 ]; then  
            PIDS=`ps -ef | grep "app" | grep -v "grep" | grep -v "vim" | grep -v "sh" | awk {"print $2"}`   
            for P in $PIDS   
                do  
                    kill -9 $P   
                done  
            python /python/application/app.py > /dev/null 2>&1 &   
        else  
            echo "$url is available"  
        fi  
done 

crontab -e 
*/20 * * * * bash /sh/check_app.sh