How to poweroff multiple linux machines in a single command or script?

Question

I have more than 10 Linux machines. How may I power off all machines using a single script?

The password and user is the same for all of the machines.

score 5 · Answer 1 · answered Oct 24 '17 at 18:43

Try to use ansible.

Install ansible:

apt-get install ansible

Add your hosts to hosts file:

vim /etc/ansible/hosts
server1
server2
server3

Generate ssh key and add it on remote servers:

ssh-keygen
cat /etc/ansible/hosts | xargs -i ssh-copy-id {}

Run shutdown on servers:

ansible all -m shell -a "shutdown -h now"

You can check hosts availability by command before and after shutdown:

ansible all -m ping

Source 1, Source 2

Gilles Quénot · Accepted Answer · 2017-10-17T16:27:13.987

4

There's many mays to do it.

One option is to use ssh key pairs instead of passwords to ssh without prompting for password. Then, you can do this :

#!/bin/bash

for server; do ssh $server 'halt; exit'; done

Usage:

./script.bash server1 server2 1.2.3.4

Or you can use a better approach with a tool like ansible or pssh

edited Oct 17 '17 at 16:27

answered Oct 17 '17 at 16:11

Gilles Quénot

33,867

foo,bar,base are hostnames ? – MikePappa Oct 17 '17 at 16:17
Sure it is servers names... – Gilles Quénot Oct 17 '17 at 16:20
will ip address work instead of hostname? – MikePappa Oct 17 '17 at 16:22
Yes, it will work, for sure... – Gilles Quénot Oct 17 '17 at 16:24
what will happend to this script if one of the machine is already in power off state ? will it break or continue executing next ? – MikePappa Oct 17 '17 at 16:24
It will produce an error, then continue executing next server – Gilles Quénot Oct 17 '17 at 16:25
will this work? ' #!/bin/bash servers = '123.123.123.123 111.111.111.111' for server; do ssh $server 'halt; exit'; done' – MikePappa Oct 17 '17 at 16:32
3

Maybe you can try by yourself and start experimenting ?! – Gilles Quénot Oct 17 '17 at 16:32

score 1 · Answer 3 · answered Oct 24 '17 at 18:52

1

Setup an ssh key for the user “shutdown”. If you look at /etc/passwd, this user’s default shell is /sbin/shutdown. So just logging in will execute the shutdown command.

answered Oct 24 '17 at 18:52

Dave Evans

152

score 0 · Answer 4 · answered Oct 17 '17 at 16:10

0

I use fabric (http://www.fabfile.org/). You'd write a python script and can then run it on remote systems. It's quick and works pretty well for me for remote system administration.

answered Oct 17 '17 at 16:10

L.Ray

469

How to poweroff multiple linux machines in a single command or script?

4 Answers4