On Thu, Sep 22, 2011 at 9:14 AM, Christopher Wood
<christopher_w...@pobox.com> wrote:
> On Thu, Sep 22, 2011 at 09:05:32AM -0700, Douglas Garstang wrote:
>> On Thu, Sep 22, 2011 at 5:57 AM, jcbollinger <john.bollin...@stjude.org> 
>> wrote:
>> >
>> >
>> > On Sep 21, 6:34 pm, Nigel Kersten <ni...@puppetlabs.com> wrote:
>> >> On Wed, Sep 21, 2011 at 1:20 PM, Douglas Garstang
>> >>
>> >> <doug.garst...@gmail.com> wrote:
>> >> > All,
>> >>
>> >> > I have a situation where I need to get some fairly complex
>> >> > configuration files onto systems, and I'm wondering if puppet can even
>> >> > do this. Lets say that my external node script will go and source all
>> >> > the data it needs from an external database, and dump out all
>> >> > variables that the node will need. The relevant puppet module(s) will
>> >> > then have to inject these variables into templates to be deployed to
>> >> > the systems.
>> >>
>> >> Can you provide an example of a chunk of actual data and the desired
>> >> end result to see if there's a better alternative Doug?
>> >
>> >
>> > I second that request.  The scenario presented is more a design
>> > concept than a problem description.  Although I am confident that
>> > Puppet indeed can handle the scenario as presented, it may be that
>> > there are alternative designs that would accomplish the same objective
>> > in a simpler way.
>>
>> Well, speaking somewhat generically still, we have an application that
>> will need to run multiple times on a single system, and each instance
>> of that running application will have it's own config file, each with
>> a variable number of items (they're disk volumes).
>>
>> If the external node script returned YAML data like this:
>>
>> appX_inst1_vol1_name: vol1
>> appX_inst1_vol1_size: 1G
>> appX_inst1_vol1_active: true
>> appX_inst2_vol1_name: vol2
>> appX_inst2_vol1_size: 2G
>> appX_inst2_vol1_active: false
>>
>> ... and so on. All the volumes for inst1 need to go into one config
>> file, all the volumes for inst2 in another config file and so on. I
>> don't see a way that puppet can iterate over a variable number of
>> items and split the data into multiple files.
>
> At the risk of sounding dim, if you have variable files full of variable 
> data, why don't you handle that logic in the ruby stanzas in your template? 
> You can template the main file, and the ruby portions can write other files 
> as needed.

I wasn't quite sure, but is the embedded ruby in the templates fully
functional ruby? ie it can write files etc?

>
> Otherwise, if you really have variable files full of variable data, I'm 
> curious about just what application you're attempting to configure.
>

It's proprietary software. Every service company has proprietary
software that may (or may not in our case) be designed very well.

Doug.

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