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From Eric Plowe <eric.pl...@gmail.com>
Subject Re: Operating on large cluster
Date Thu, 23 Oct 2014 19:29:01 GMT
I am a big fan of perl-ssh-tools (https://github.com/tobert/perl-ssh-tools)
to let me manage my nodes and SVN to store configs.

~Eric Plowe


On Thu, Oct 23, 2014 at 3:07 PM, Michael Shuler <michael@pbandjelly.org>
wrote:

> On 10/23/2014 04:18 AM, Alain RODRIGUEZ wrote:
>
>> I was wondering about how do you guys handle a large cluster (50+
>> machines).
>>
>
> Configuration management tools are awesome, until they aren't. Having used
> or played with all the popular ones, and having been bitten by failures of
> those tools on large clusters, my long-time preference has been using a VCS
> to check configs and scripts in/out and parallel ssh (whichever one you
> like). Simple is good. If you don't deeply understand the config management
> system you have chosen, the unexpected may(will?) eventually happen. To all
> the servers at once.
>
> Even when you are careful, we are human. No tool can prevent *all*
> mistakes. Test everything in a staging environment, first!
>
> --
> Kind regards,
> Michael
>
> PS. even staging doesn't prevent fallibility.. :)
> https://twitter.com/mshuler/status/520667739615395840
>

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