On Wed, May 30, 2012 at 12:37 PM, Ryan Bowlby <rbowlb...@gmail.com> wrote:
> Hi All,
>
> Is there a way to override the value of a parameter to a declared
> class within my base class. My nodes use a base class that
> occasionally need to be changed. Example:
>
> class "base" {
> class { "apache":
> mpm => "worker",
> }
> ..other awesomeness
> }
>
> Then in the nodes:
>
> node "a" {
> include base
> }
>
> # made up syntax
> node "specialhost" {
> class "special" inherits base {
> Class { "apache": mpm => "prefork" }
> }
> }
>
> How do I override the mpm param within the apache declaration within
> the base class for "specialhost"? Is this possible and if not what are
> the common workarounds?
>
> Thanks,
> Ryan
>
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>
The way Ryan has described will allow you to override parameters FROM a
base class inside of a called class. You were asking about overriding
parameters from inside the BASE class to a called class? If you're getting
to this level of abstraction, I'd look a data lookup mechanism like Hiera
that will allow you to specify different data/parameters based on hierarchy
levels of your own design. The benefit of THAT is that you don't need to
use the parameterized class syntax, you can simply do 'include base' or
even 'include apache' and the parameters to the apache class would always
be looked-up to determine the appropriate value per-host. Does that make
sense (or help)?
--
Gary Larizza
Professional Services Engineer
Puppet Labs
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