View source for Run one script in multiple servers

== Using shell script ==
We will use 3 files to run a single script into multiple server at once.

* script.sh
* servers.list
* run.sh



The file servers.list is a list of all servers you will run the script on.

The file script.sh is the script that will be runned on the servers.

The file run.sh will get all servers into the file serves.list will copy the script.sh to /tmp of each server and execute from the server.

=== Files ===

==== servers.list ====
 server1
 server2
 server3
 .
 .
 .

==== script.sh ====
 #!/bin/bash
 
 echo "Hello from $(hostname)"

==== run.sh ====
 #!/bin/bash
 
 username=USER_USERNAME
 password=USER_PASSWORD
 
 list=`cat servers.list`
 pack=script.sh
 
 for server in $list; do
         echo ""
         echo $server
 
         scp_command="sshpass -p "$password" scp -o StrictHostKeyChecking=no -o NumberOfPasswordPrompts=1 -o ConnectTimeout=10 -q $pack $username@$server:/tmp"
         $scp_command
 
         ssh_command="sshpass -p "$password" ssh -o StrictHostKeyChecking=no -o NumberOfPasswordPrompts=1 -o ConnectTimeout=10 -q $username@$server"
 
         # running without sudo
         $ssh_command chmod +x /tmp/script.sh
         $ssh_command /bin/sh /tmp/script.sh
         $ssh_command rm -fr /tmp/script.sh
 
         # running with sudo
         #$ssh_command chmod +x /tmp/script.sh
         #$ssh_command sudo /bin/sh /tmp/script.sh
         #$ssh_command sudo rm -fr /tmp/script.sh
 
 done
Remember that if you want to run the script with sudo on the servers just uncomment what is bellow the "# running with sudo" and comment what is bellow "# running without sudo".

== Using python ==
We will use 3 files to run a single script into multiple server at once.
* script.sh
* servers.list
* run.sh



The file servers.list is a list of all servers you will run the script on.

The file script.sh is the script that will be runned on the servers.

The file run.sh will get all servers into the file serves.list will copy the script.sh to /tmp of each server and execute from the server.

=== Files ===

==== servers.list ====
 server1
 server2
 server3
 .
 .
 .

==== script.sh ====
 #!/bin/bash
 
 echo "Hello from $(hostname)"

==== run.py ====
 import paramiko, datetime
 
 menu = \
 """
 1 - Save stdout and stderr to a file
 2 - Print stdout and stderr to console
 """
 
 servers_file_path = 'servers.txt'
 script_file_path = 'script.sh'
 
 port = 22
 username = 'user'
 password = 'senha'
 
 while True:
     print("You want to:")
     print(menu)
     user_option = input()
     if user_option == '1':
         break
     elif user_option == '2':
         break
     else:
         print('This option does not exists.')
 
 
 with open(servers_file_path, 'r') as servers_file:
     servers_list = servers_file.read().lower().split('\n')
 
 with open(script_file_path, 'r') as script_file:
     script = script_file.read()
 
 print("starting the loop")
 for server in servers_list:
 
     client = paramiko.SSHClient()
     client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
 
     try:
         print('Connecting to server: ', server)
         client.connect(server, port, username, password)
 
         print('Executing script')
         stdin, stdout, stderr = client.exec_command(script, timeout=60)
 
         if user_option == '1':
             print('Saving stdout to file')
             for line in stdout:
                 with open(f'{server}.txt', 'a+') as asdasd:
                     asdasd.write(line)
             print('Saving stderr to file')
             for line in stderr:
                 with open(f'{server}.txt', 'a+') as asdasd:
                     asdasd.write(line)
         else:
             print('Output:')
             for line in stdout:
                 print(line)
             for line in stderr:
                 print(line)
     except Exception as e:
         print('ERROR: ', e)
     else:
         client.close()
Then just run python3 run.py.