Puppet users - Oct 2010 - Pulling in a Hash from an external data source?

I have a scenario where I''d like to pull in a hash table from an
external file (really, a generate() function.. but for testing purposes, a file
will do)... is there any way to do that?

—Matt

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I have a scenario where I''d like to pull in a hash table from an
external file (really, a generate() function.. but for testing purposes, a file
will do)... is there any way to do that?

—Matt

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On Thu, Oct 21, 2010 at 5:17 PM, Matt Wise <wise@wiredgeek.net>
wrote:
> I have a scenario where I''d like to pull in a hash table from an
external file (really, a generate() function.. but for testing purposes, a file
will do)... is there any way to do that?
You probably want the extlookup function:

http://docs.puppetlabs.com/references/latest/function.html#extlookup

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Hello Richard,

Am 22.10.2010 02:41, schrieb Richard Crowley:
> On Thu, Oct 21, 2010 at 5:17 PM, Matt Wise <wise@wiredgeek.net>
wrote:
>> I have a scenario where I''d like to pull in a hash table from
an external file (really, a generate() function.. but for testing purposes, a
file will do)... is there any way to do that?
> 
> You probably want the extlookup function:
> 
> http://docs.puppetlabs.com/references/latest/function.html#extlookup
i do not think that "extlookup" is the solution we are looking for,
because it is not powerful enough.

For some kind of modules you will need the relation between host an ip,
or host an service. At the moment, i am using a bunch of if/else cases,
but a hash or function which is parsing a *.yaml file would be more
powerful.

The Debian project has found a nice way to handle this.

http://git.debian.org/?p=mirror/dsa-puppet.git;a=blob_plain;f=manifests/site.pp;hb=HEAD

http://git.debian.org/?p=mirror/dsa-puppet.git;a=tree;f=files/etc/puppet/lib/puppet/parser/functions;hb=HEAD

Regards, Dennis

Agreed... I use extlookup for our external arrays — but I cannot use it for
hash''s. Hashes are sometimes the only sane way to go, so I''m
hoping to see more advanced hash support soon. Really we have a case where
we''re going to be pulling live data from a SQL database during each
run, and dumping it out in a hash format of some kind is the best thing for our
use-case.

—Matt

On Oct 22, 2010, at 9:50 AM, Dennis Hoppe wrote:
> Hello Richard,
> 
> Am 22.10.2010 02:41, schrieb Richard Crowley:
>> On Thu, Oct 21, 2010 at 5:17 PM, Matt Wise <wise@wiredgeek.net>
wrote:
>>> I have a scenario where I''d like to pull in a hash table
from an external file (really, a generate() function.. but for testing purposes,
a file will do)... is there any way to do that?
>> 
>> You probably want the extlookup function:
>> 
>> http://docs.puppetlabs.com/references/latest/function.html#extlookup
> 
> i do not think that "extlookup" is the solution we are looking
for,
> because it is not powerful enough.
> 
> For some kind of modules you will need the relation between host an ip,
> or host an service. At the moment, i am using a bunch of if/else cases,
> but a hash or function which is parsing a *.yaml file would be more
> powerful.
> 
> The Debian project has found a nice way to handle this.
> 
>
http://git.debian.org/?p=mirror/dsa-puppet.git;a=blob_plain;f=manifests/site.pp;hb=HEAD
> 
>
http://git.debian.org/?p=mirror/dsa-puppet.git;a=tree;f=files/etc/puppet/lib/puppet/parser/functions;hb=HEAD
> 
> Regards, Dennis
> 
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----- "Matt Wise" <wise@wiredgeek.net> wrote:
> Agreed... I use extlookup for our external arrays — but I cannot use
> it for hash''s. Hashes are sometimes the only sane way to go, so
I''m
> hoping to see more advanced hash support soon. Really we have a case
> where we''re going to be pulling live data from a SQL database
during
> each run, and dumping it out in a hash format of some kind is the best
> thing for our use-case. 

I''ve patched the 2.6.x extlookup to support hashes but people dont seem
to keen on the idea, feel free to vote on the ticket

http://projects.puppetlabs.com/issues/4433

> 
> —Matt
> 
> On Oct 22, 2010, at 9:50 AM, Dennis Hoppe wrote:
> 
> > Hello Richard,
> > 
> > Am 22.10.2010 02:41, schrieb Richard Crowley:
> >> On Thu, Oct 21, 2010 at 5:17 PM, Matt Wise
<wise@wiredgeek.net>
> wrote:
> >>> I have a scenario where I''d like to pull in a hash
table from an
> external file (really, a generate() function.. but for testing
> purposes, a file will do)... is there any way to do that?
> >> 
> >> You probably want the extlookup function:
> >> 
> >>
> http://docs.puppetlabs.com/references/latest/function.html#extlookup
> > 
> > i do not think that "extlookup" is the solution we are
looking for,
> > because it is not powerful enough.
> > 
> > For some kind of modules you will need the relation between host an
> ip,
> > or host an service. At the moment, i am using a bunch of if/else
> cases,
> > but a hash or function which is parsing a *.yaml file would be more
> > powerful.
> > 
> > The Debian project has found a nice way to handle this.
> > 
> >
>
http://git.debian.org/?p=mirror/dsa-puppet.git;a=blob_plain;f=manifests/site.pp;hb=HEAD
> > 
> >
>
http://git.debian.org/?p=mirror/dsa-puppet.git;a=tree;f=files/etc/puppet/lib/puppet/parser/functions;hb=HEAD
> > 
> > Regards, Dennis
> > 
> 
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-- 
R.I.Pienaar

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On Fri, 2010-10-22 at 14:57 -0700, Matt Wise wrote:
> Agreed... I use extlookup for our external arrays — but I cannot use it for
hash''s. Hashes are sometimes the only sane way to go, so I''m
hoping to see more advanced hash support soon. Really we have a case where
we''re going to be pulling live data from a SQL database during each
run, and dumping it out in a hash format of some kind is the best thing for our
use-case.
I''ve got a script on Github that allows you to turn the
''ksmeta'' field
from Cobbler into custom facts, I''m sure it wouldn''t take too
much to
turn it into a hash-lookup script as this is effectively what it does
anyway...

The script is at
http://github.com/proffalken/cobbler-puppet/blob/master/puppet/lib/facter/system_setup.rb

Kind regards,

Matt

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