[SOLVED] how to run a script in all servers at a time.

bkarthick · 02-28-2013, 07:53 PM

Hi

We have around 200+ servers and in each server there are 400 users residing.i Wrote a script which will fetch the secondary group of all users.In each server i ran the script to get the information.Is there a way to run the script in all servers at a time.

shivaa · 02-28-2013, 08:26 PM

Efficient way is to set password less authentication on all servers and then add a loop in your script plus a file containing a list of the servers:

Code:

SERVER=/tmp/serverlist.txt
while read -r server
do
ssh user@$server "command"
done < $SERVER

--- INFO. ADDED ----

Check this tutorial for password-less login using ssh.
Note: You will need to login on all servers then, and put ssh keys there.

cbtshare · 02-28-2013, 09:20 PM

If by the phrase "At the same time" you mean synchronized . Then the best way is make the servers NTP clients and then setup a cron job.

colucix · 03-01-2013, 02:38 AM

Quote:

Originally Posted by shivaa

Efficient way is to set password less authentication on all servers and then add a loop in your script plus a file containing a list of the servers:

Code:

SERVER=/tmp/serverlist.txt
while read -r server
do
ssh user@$server "command"
done < $SERVER

In this case don't forget to add the -n option to ssh, for reasons explained here.

jk04 · 03-01-2013, 08:59 AM

Are you using a configuration management tool such as puppet? If yes, then you might want to investigate using it for command execution on remote servers.

linosaurusroot · 03-01-2013, 09:05 AM

Programs like these enable running commands on multiple hosts.
fanout - http://www.stearns.org/fanout/README.html
pdsh - http://code.google.com/p/pdsh/

Another comment suggests configuration management (puppet/chef/cfengine).

bkarthick · 03-09-2013, 12:43 AM

Hi All,

Thanks i got it...