David On Net

I develop a small Python script to send command on a list of server. This script use ssh to run the command on all server. For example, it can manage to run a security update on Debian server with the send of "apt-get update;apt-get -y upgrade" command.

The Script

The Script use thread to send the command to each server simultaneously. The output of command is write to a file named <server_name>.log

 #!/usr/bin/env python
 
 import os
 from threading import Thread
 
 
 class MyThread(Thread):
     def __init__(self,serverName,command):
                 Thread.__init__(self)
                 self.serverName=serverName
                 self.command=command
     
    def run(self):
                cmd_ssh = "ssh root@"+self.serverName+ " '"+self.command+"'"
                 logfile = open(self.serverName+".log",'w')
                 for line in os.popen(cmd_ssh).readlines():
                         logfile.write(line)
                 logfile.close()
 
 cmdFile = open("cmd")
 cmd = cmdFile.readline()
 cmdFile.close()
 
 servers = open("servers")
 server = servers.readline()
 while server:
         thrd = MyThread(server[:-1], cmd[:-1])
         thrd.start()
         print "Thread for "+server[:-1]+" server started"
         server = servers.readline()
 servers.close() 

Use

To use the script, download it here and create the following file :

• servers : one line by server name,
• cmd : one line with the command to send (if you want a list of command, separate each command by ; on one line).

The script use ssh, but it cannot send the passphrase to ssh. Also you need to use the authentification with certificat and if you have a passphrase, you must use ssh-agent.

And now run the src.py command and wait the end of each command on each server.