On Tuesday, July 3, 2012 at 5:31 AM, Itamar Landsman wrote:
> Hi All,
>
> First I want to apologize, I never completely dove into the fine details of
> puppet. I just use it on my network of +-100 VMs for odd jobs.
>
> my question is: I know how to set up a class that would, for example, install
> a package on a machine based on a facter variable (e.g. operating system
> version).
> within the curly braces I can even put a list of operation that would all not
> be run if the machine in question does not conform to the specific variable.
>
> I am looking for a way to do something similar using something like if a file
> on the host exists (similar to the 'onlyif' that is available in the exec
> type).
>
> my dream is:
>
> class foo{
> onlyif "test[ condition ]" {
> file{.....}
> exec{.......}
> }
> }
Itamar,
You should take a look at the Puppet Language Guide
(http://docs.puppetlabs.com/guides/language_guide.html) - and in general the
rest of the docs site, in particular Learning Puppet, which might help you with
some of the fundamentals.
There are a number of ways to express what you are attempting to do, but you
nearly have it. If you have a fact "myfile_present" for which the value is
true, for instance, you can do the following:
class foo {
if $::myfile_present == true {
file { … }
exec { … }
}
}
In the above mentioned Language Guide, check out the section on Conditionals.
-Eric
--
Eric Shamow
Professional Services
http://puppetlabs.com/
(c)631.871.6441
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