Puppet users - Jul 2012 - Can puppet manage an image rather than a running host

Hi,

Can puppet manage images (as opposed to running hosts)?

This could be a chroot, an LXC container, etc. 


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On Thursday, July 19, 2012 3:14:04 PM UTC-5, bluckau
wrote:
>
> Hi,
>
> Can puppet manage images (as opposed to running hosts)?
>
> This could be a chroot, an LXC container, etc. 
>
>
You could perhaps do this with a full-enough chroot environment, especially 
if you launch the agent on a single-run basis via an external scheduler 
(e.g. cron) instead of running it as a daemon.  You need to fool the agent 
into seeing the image as the actual operating environment.

Alternatively, if the image can be mounted on the real host, then you can 
manage its contents through the host via File resources.  That would have a 
much different feel and implementation than managing a real host, however.

Or you can just use Puppet to sync up newly-imaged systems instead of to 
maintain the image itself.


John

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On Thu, Jul 19, 2012 at 2:24 PM, jcbollinger <John.Bollinger@stjude.org>
wrote:
>
>
> On Thursday, July 19, 2012 3:14:04 PM UTC-5, bluckau wrote:
>>
>> Hi,
>>
>> Can puppet manage images (as opposed to running hosts)?
>>
>> This could be a chroot, an LXC container, etc.
>>
>
> You could perhaps do this with a full-enough chroot environment, especially
> if you launch the agent on a single-run basis via an external scheduler
> (e.g. cron) instead of running it as a daemon.  You need to fool the agent
> into seeing the image as the actual operating environment.
I''ve done this in the past for producing images that are then used in
PXE setups so the gap between the image and Puppet stayed small.

We ended up needing to tread warily around things like Kerberos
principals, but it worked quite seamlessly so long as it looks like an
actual operating environment to Puppet.

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