[Outages-discussion] Avoiding puppet/cfengine as the next SPOF

[George William Herbert]

Even with one-few-many, you have test failures, config problems that take longer than test time to fully manifest, n^2 and n! Scaling for some disturbance patterns, etc.

Nothing is perfect...


-george william herbert
george.herbert at gmail.com

Sent from Kangphone

On Jan 25, 2014, at 4:48 PM, Jay Ashworth <jra at baylink.com> wrote:

> [ moved to -discuss ]
> 
> ----- Original Message -----
>> From: "Conrad Heiney" <conrad at fringehead.org>
> 
>> Centralized configuration is necessary. It is also the new SPOF.
> 
> I would assert that if it is, you're not driving it correctly. 
> 
> Sure, you need it on things as big as the Googleplex.  But that doesn't mean
> that you can't use Tom Limoncelli's celebrated "one, few, many, all" 
> staged deployment approach, when setting up pushes.
> 
> In fact, it's *easier*, since you know that they'll all get the same 
> configuration.
> 
> You have to be careful about interdependencies, of course, but that --
> again -- is something computers are pretty good at.  :-)
> 
> Cheers,
> -- jra
> -- 
> Jay R. Ashworth                  Baylink                       jra at baylink.com
> Designer                     The Things I Think                       RFC 2100
> Ashworth & Associates       http://www.bcp38.info          2000 Land Rover DII
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