Puppet users - May 2009 - Assign variable with content of a file?

Anyone know of how I can do in puppet the equivalent of this from the
land of shell scripting?

foo=$(cat /tmp/bar)

or if you prefer

foo=`cat /tmp/bar`

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no-can-do.  What exactly are you trying to get done?


-brandon

John Florian wrote:
> Anyone know of how I can do in puppet the equivalent of this from the
> land of shell scripting?
> 
> foo=$(cat /tmp/bar)
> 
> or if you prefer
> 
> foo=`cat /tmp/bar`
> 
> > 
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Can you create a "fact", then use the "fact" in you puppet
manifest?

---
Thanks,

Allan Marcus
505-667-5666



On May 1, 2009, at 3:04 PM, John Florian wrote:
>
> Anyone know of how I can do in puppet the equivalent of this from the
> land of shell scripting?
>
> foo=$(cat /tmp/bar)
>
> or if you prefer
>
> foo=`cat /tmp/bar`
>
> >

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John Florian wrote:
> Anyone know of how I can do in puppet the equivalent of this from the
> land of shell scripting?
> 
> foo=$(cat /tmp/bar)
> 
> or if you prefer
> 
> foo=`cat /tmp/bar`
On the master you can use the generate function to populate a variable
value.

http://reductivelabs.com/trac/puppet/wiki/FunctionReference#generate

Otherwise you should use a fact.

Regards

James Turnbull

- --
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On May 1, 7:28 pm, James Turnbull <ja...@lovedthanlost.net>
wrote:
> On the master you can use the generate function to populate a variable
> value.
That looks promising.  However, in this particular situation, I cannot
use the regular puppetmasterd/puppetd arrangement.  I must use the
stand-alone puppet instead.  Will this still work?
> Otherwise you should use a fact.
I hadn''t realized that I could create custom facts.
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On May 1, 5:59 pm, Brandon Evans <bev...@adicio.com>
wrote:
> no-can-do.  What exactly are you trying to get done?

Apologies for leaving that out -- I''d hoped to not muddy the water
with the details, but now it seems I must.

I want to install a home-built package whose application runs on a
virtual console exclusively.  Which VC specifically is controlled by
that app''s conf file.  This app must be able to run on a VC that is
normally occupied by a getty so therefore prior to app startup, it is
necessary to tell upstart to disable that getty.  I want puppet to do
all of this, of course.  The basic steps and required sequence are:

1. install package
2. install conf file for package
3. extract VC number from conf file, say as $ttynum
4. exec "initctl stop tty$ttynum"
5. exec "app"

Puppet does NOT know what VC number is in the conf file -- it must
extract this.  (The reasons are way beyond the scope here.)  Now, I''ve
made step 3 a bit easier by revising the package so that it''s possible
to run "app --show-vc" and it''ll parse the conf file and send
the
number to stdout.  I cannot run this command directly with the
generate function because of the embedded space character.  So I
thought I''d cheat and have puppet generate a temp file that is
essentially a one-line shell script to run that command and have the
generate function call this temporary file instead.  Now it becomes a
question of how to ensure that puppet creates the temp script before
the generate function calls it.

This is starting to look like a real headache.  Unless someone sees an
easier way to do something like this, I think I''ll just revise the app
to do step 4 itself -- although that is rather icky in itself.
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