停电后，在UPS电源下服务器自动关机脚本

 一年总有那么几次莫明停电，公司的服务器经不起这样的折腾 
写了一个断电后UPS备用电源自动关机的脚本 
原理就是检测路由器网关是否能ping通，长时间持续ping不通视为停电了 
路由器不要接到ups上 
用法 
    1.检测网关是否持续ping不通300次(forever模式，添加到启动任务即可)  
      sudo ./ups_check forever 192.168.1.1 300 
   2.检测网关是否持续ping不通30次（once模式，需要配合crond使用) 
      sudo ./ups_check once 192.168.1.1 30 

#!/bin/sh

 

# halt command

HALT=halt

 

ping_forever_host(){

    IP=$1

    time_out=$2

    count=3

    kernel=`uname -s`

    total_miss=0

    echo "ups check host '${IP}' for (${time_out}) seconds, [forever mode]"

 

    # ping host, if miss recieved packets, then add to total_miss

    while true

    do

        case $kernel in

            VMkernel)            #esxi 5.1

                ret=`ping -c ${count} -W 1 ${IP} 2>&1|grep 'packets transmitted'|sed 's/.*, (.*) packets received,.*/1/'`

                ;;

            Darwin)            #MacOS X 10.7.4

                ret=`ping -c ${count} -W 1 ${IP} 2>&1|grep 'packets transmitted'|sed 's/.*, (.*) packets received,.*/1/'`

                ;;

            Linux)            #ubuntu 12.04

                ret=`ping -c ${count} -W 1 ${IP} 2>&1|grep 'packets transmitted'|sed 's/.*, (.*) received,.*/1/'`

                ;;

            *)

                echo "Unknown Architecture $kernel"

                exit 1

                ;;

        esac

 

        miss=$((count-ret))

        if [ $miss -eq $count ]; then

            total_miss=$((total_miss+miss))

            echo "total_miss: ${total_miss} --> ${time_out}"

        else

            total_miss=0

        fi

         

        # if miss count over limit, then halt the computer!!!

        if [ $total_miss -ge $time_out ]; then

            echo "SYSTEM WILL HALT AT '`date`'!!!"

            ${HALT}

            break;

        fi

    done

}

 

ping_once_host(){

    IP=$1

    count=$2

    time_out=$2

    kernel=`uname -s`

    total_miss=0

    echo "ups check host '${IP}' for (${time_out}) seconds, [once mode]"

 

    # ping host, if miss recieved packets, then add to total_miss

    case $kernel in

        VMkernel)            #esxi 5.1

            ret=`ping -c ${count} -W 1 ${IP} 2>&1|grep 'packets transmitted'|sed 's/.*, (.*) packets received,.*/1/'`

            ;;

        Darwin)            #MacOS X 10.7.4

            ret=`ping -c ${count} -W 1 ${IP} 2>&1|grep 'packets transmitted'|sed 's/.*, (.*) packets received,.*/1/'`

            ;;

        Linux)            #ubuntu 12.04

            ret=`ping -c ${count} -W 1 ${IP} 2>&1|grep 'packets transmitted'|sed 's/.*, (.*) received,.*/1/'`

            ;;

        *)

            echo "Unknown Architecture $kernel"

            exit 1

            ;;

    esac

 

    miss=$((count-ret))

    if [ $miss -eq $count ]; then

        total_miss=$((total_miss+miss))

        echo "total_miss: ${total_miss} --> ${time_out}"

    else

        total_miss=0

    fi

     

    # if miss count over limit, then halt the computer!!!

    if [ $total_miss -ge $time_out ]; then

        echo "SYSTEM WILL HALT AT '`date`'!!!"

        ${HALT}

    fi

}

 

main(){

    action=$1;

    case $action in

        forever)            #run forever

            ping_forever_host $2 $3

            ;;

        once)               # run once

            ping_once_host $2 $3

            ;;

        *)

            echo "usage: sudo ./ups_check forever 192.168.2.1 120"

            echo "usage: sudo ./ups_check once 192.168.2.1 60"

            exit 1

            ;;

    esac

}

 

main $1 $2 $3