最近项目上新上了2台时钟设备，需要把网络内的一百多台linux服务器配置NTP服务，实现和时钟设备时间同步，为了避免每台设备挨个配置的麻烦，写了一个python脚本。脚本分3个文件，第一个是python脚本，第二个是主机清单，里面包含IP地址和密码两项，第三个是命令文件，包含从yum安装ntp软件包到配置ntp.conf参数文件到启动NTP服务所要执行的操作语句。执行脚本，调用这个两个文件，网络内的所有服务器NTP安装配置起服务就完成了。事实上这个脚本可以做各种批量操作，只需要改一下命令文件即可，脚本不用做任何更改。

cat cmd_list.txt

###配置NTP文件

mv /etc/ntp.conf /etc/ntp.conf.bak

echo ‘server 192.168.5.200’ >> /etc/ntp.conf

echo ‘Fudge 192.168.5.200 stratum 10’ >> /etc/ntp.conf

###安装NTP软件包并启动NTP服务

rm /etc/yum.repos.d/*.repo

echo ‘[ol7_u5_base]’ >> /etc/yum.repos.d/local.repo

echo ‘name=Oracle Linux’ >> /etc/yum.repos.d/local.repo

echo ‘baseurl=http://192.168.5.250/redhat7’ >> /etc/yum.repos.d/local.repo

echo ‘gpgkey=http://192.168.5.250/redhat7/RPM-GPG-KEY-redhat-release’ >> /etc/yum.repos.d/local.repo

echo ‘gpgcheck=1’ >> /etc/yum.repos.d/local.repo

echo ‘enabled=1’ >> /etc/yum.repos.d/local.repo

yum install -y ntp*

systemctl start ntpd

systemctl enable ntpd

cat host.txt

192.168.5.1 pass1

192.168.5.2 pass2

…

192.168.5.254 pass254

cat auto_ntp.py

import paramiko

import time

import sys

import socket

host = open(sys.argv[1])

host_list = []

username=“root”

for hosta in host.readlines():

host_list.append(hosta.strip().split())

f = open(‘log.txt’, ‘a’)

cmd = open(sys.argv[2])

for hostname,password in host_list:

ssh_client = paramiko.SSHClient()

ssh_client.set_missing_host_key_policy(paramiko.AutoAddPolicy())

try:

   ssh_client.connect(hostname=hostname, username=username, password=password)

   print("Successfull connected to ", hostname)

   cmd.seek(0)

   stdin, stdout, stderr = ssh_client.exec_command('hostname')

   f.write(hostname + ' ' + stdout.read().decode('utf-8') + "\n")

   for ccc in cmd.readlines():

       c = ccc.strip()

       stdin, stdout, stderr = ssh_client.exec_command(c)

       f.write(stdout.read().decode('utf-8') + "\n")

       f.write(stderr.read().decode('utf-8') + "\n")

except paramiko.ssh_exception.AuthenticationException:

       print("User authentication failed for " + username)

except socket.error:

       print(hostname + " is not reachable.")

cmd.close()

f.close()

ssh_client.close()

执行：

python auto_ntp.py host.txt cmd_list.txt

批量做其他任意操作均可，只要修改cmd_list.txt文件中的操作语句即可

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