shell 脚本同时对远程多台机器执行命令-优快云博客

本文介绍三种在多台远程主机上同时执行命令的方法。第一种使用ssh-copy-id实现免密登录；第二种利用sshpass进行批量执行，适用于用户名和密码相同的场景；第三种从文件读取IP、用户名和密码信息，增强灵活性。

脚本1：需要机器之间免密

ssh-copy-id [-i [identity_file]] [user@]machine

#!/bin/bash
# -------------------------------------------------------------------------------
# Author:   Loya.Chen
# Description: Execute commands on multiple remote hosts at the same time.
# -------------------------------------------------------------------------------
set -e
Usage() {
  echo "Usage: $0 host1 host2 ... 'command'"
}
if [ $# -lt 2 ] ;then
  Usage
  exit 0
else
  cmd=${!#}
fi
logfile=$(mktemp)
i=1
success=0
failed=0
for ip in $@;do
  if [ $i -eq $# ];then
    break
  fi
  ssh $ip $cmd &> $logfile
  if [ $? -eq 0 ];then
    #((success++))
    success=$(($success+1))
    echo -e "\n\033[32m$ip | success \033[0m \n"
    cat $logfile
  else
    ((failed++))
    echo -e "\n\033[31m$ip | failed \033[0m\n "
    cat $logfile
  fi
  ((i++))
done
echo -e '\n-------------------------'
echo -e "\033[32msuccess: $success | failed: $failed \033[0m"
echo '-------------------------'

方法2：这种方式可以不用免密，但是需要在执行命令的机器用户名和密码一致

#!/bin/bash
# -------------------------------------------------------------------------------
# Author:   JiangTao.Yu
# Description: Execute commands on multiple remote hosts at the same time.
# -------------------------------------------------------------------------------
set -e
Usage() {
  echo "Usage: $0 host1 host2 ... 'command'"
}
if [ $# -lt 2 ] ;then
  Usage
  exit 0
else
  cmd=${!#}
fi
logfile=$(mktemp)
i=1
success=0
failed=0
for ip in $@;do
  if [ $i -eq $# ];then
    break
  fi
  sshpass -p "mypasswd" ssh -o "StrictHostKeyChecking no" hduser@$ip $cmd &> $logfile
  if [ $? -eq 0 ];then
    #((success++))
    success=$(($success+1))
    echo -e "\n\033[32m$ip | success \033[0m \n"
    cat $logfile
  else
    ((failed++))
    echo -e "\n\033[31m$ip | failed \033[0m\n "
    cat $logfile
  fi
  ((i++))
done
echo -e '\n-------------------------'
echo -e "\033[32msuccess: $success | failed: $failed \033[0m"
echo '-------------------------'

方法3、从文件读取ip、username、passwd

#!/bin/bash
set -e
success=0
failed=0
while read  ip username passwd
do
   ip=$ip
   username=$username
   passwd=$passwd
   sshpass -p $passwd  ssh -n -o "StrictHostKeyChecking no" $username@$ip "free -m"
   if [ $? -eq 0 ];then
      success=$(($success+1))
      echo -e "\n\033[32m$ip | success\033[0m\n" 
   else
       failed=$(($failed+1))
       echo -e "\n\033[32m$ip | failed\033[0m\n" 
   fi

done < ip_user_passwd.txt
echo -e '\n-------------------------'
echo -e "\033[32msuccess: $success | failed: $failed \033[0m"

[root@test ~]# cat ip_user_passwd.txt
192.168.0.235   hduser  mypasswd
192.168.4.50    root    123456
192.168.4.50    root    123456

借鉴：https://www.jb51.net/article/119541.htm

转载于:https://www.cnblogs.com/yjt1993/p/10283110.html