Question

我正在尝试一个shell脚本，它需要等待该服务停止，如果停止的脚本继续执行，否则该脚本将挂起退出。有人可以帮我这个忙。我正在尝试的PFB脚本

for i in 13.127.xxx.xxx xx.xxx.xxx.xx
do
    echo '############# Stopping the '$i' Apache service ################'
    ssh $i echo 'ansible' | sudo -S /etc/init.d/apache2 stop || { echo 'my command failed' ; exit 1 ; } 
    wait
    echo 'service has been stopped'

    echo '############# Status of the '$i' Apache service ################'
    abc=0
    abc=`ps -ef | grep "apache" | grep -v "grep" | wc -l`

    if [ $abc -eq 0 ]
    then
        echo "Boomi process on $i is stopped, proceeding further!!!"
    else
        echo "Exiting the script as Script could not stop the Boomi process, Please check the issue " ; exit 1;

    fi

    sleep 10
    ssh $i echo 'ansible' | sudo -S /etc/init.d/apache2 status
done

Answer 1

对我来说，脚本应如下所示：

#!/bin/bash

for i in 13.127.xxx.xxx xx.xxx.xxx.xx
do
    echo '############# Stopping the '$i' Apache service ################'
    ssh $i echo "ansible | sudo -S /etc/init.d/apache2 stop" || { echo 'my command failed' ; exit 1 ; }
    wait
    echo 'service has been stopped'

    echo '############# Status of the '$i' Apache service ################'
    abc=0
    abc=$(ssh $i echo "ansible | sudo -S pgrep apache | wc -l")

    if [ "$abc" -eq 0 ]
    then
        echo "Boomi process on $i is stopped, proceeding further!!!"
    else
        echo "Exiting the script as Script could not stop the Boomi process, Please check the issue " ; exit 1;

    fi

    sleep 10
    ssh $i echo "ansible | sudo -S /etc/init.d/apache2 status"
done

sshing您的主机时检查引号和abc var

Answer 2

一个人应该警告，通过简单的ssh bash命令使用管道重定向传递未加密的密码既不安全，也很糟糕。可以检查脚本的脚本将立即获得对节点的root访问权限。正确的方法是添加一个行sudoers文件，以作为普通，无特权的用户执行指定的命令（/etc/init.d/apache和pgrep）。

for i in 13.127.xxx.xxx xx.xxx.xxx.xx; do

    echo '############# Stopping the '"$i"' Apache service ################'
    if ! ssh "$i" 'echo ansible | sudo -S /etc/init.d/apache2 stop'; then
        echo "ERROR: stopping apache2 on $i failed!" >&2
        exit 1
    fi
    echo 'service has been stopped'

    echo '############# Status of the '"$i"' Apache service ################'
    ssh "$i" 'echo ansible | sudo -S pgrep apache' && ret=$? || ret=$?
    if [ "$ret" -eq 0 ]; then
        echo "apache process is not stopped"
    elif [ "$ret" -eq 1 ]; then
        echo "apache process was successfully stopped"
    else
        echo "error in executing ssh + pgrep"
        exit 1
    fi

    sleep 10
    ssh "$i" 'echo ansible | sudo -S /etc/init.d/apache2 status'
done

您忘记了引号。如果您运行ssh $i echo ansible | ....，则...中的零件将在本地而不是在远程计算机上执行。 |字符分隔命令，就像;或&&或||或&一样。除了分隔命令外，它还将第一个命令stdout与其他stdin连接起来。

要在其他主机上运行所有内容，需要将其作为参数传递给ssh ssh $i "echo ansible | ...."。整个命令传递给ssh，然后远程shell将命令再次拆分为令牌，并将echo ansible和...部分作为两个用|分隔的命令来执行。

等待服务停止并继续执行Shell脚本

2 个答案: