Hi Folks,
Like to get some advice on module organization. I have a system that
has a few different components. One or more components can be
installed on a host. The hosts also have a "type" dimension. This
"type" dimension could (should) ideally be used to configure the
system (fill in a bunch of variables). Problem is, I'm not sure how
the best way to do this in puppet.
I'm running puppet 2.7x.
To illustrate, I'd like to do something like this (pseudo syntax):
node 'foo.example.com' {
include module::component("systemType" => "foobar")
include module::component2("systemType" => "foobar")
}
node 'foo2.example.com' {
include module::component("systemType" => "foobar2")
include module::component3("systemType" => "foobar2")
}
or, maybe even better
node 'foo.example.com' {
include module(components => [component1,component2], "systemType"
=> "foobar")
}
node 'foo2.example.com' {
include module(components => [component1,component3], "systemType"
=> "foobar2")
}
In the above illustration, the value of componentType can determine
which files to load, as well as a bunch of variables (40-60 variables)
which would be used for things like ensuring directories are present,
ownership, users installed, etc..
I was thinking that each component would be a class, which is fine in
itself, but my real problem is the movement of these variables
(configuration). There are a lot of components, and enough variables
that I don't want to add them to each class. I want to be able to do
something like:
class mymodule(components, componentType) {
$myconfig = getConfig($componentType)
# can I "loop" through components?
include mymodule::component($myconfig)
}
Hopefully that's descriptive enough. Feel free to ask questions.
Ultimately, my major goal is to boil the configuration down to a
single location, as the configurations (systemTypes). Some like this
would work (I think) if calling the class could be dynamic:
http://docs.puppetlabs.com/guides/parameterized_classes.html#appendix-smart-parameter-defaults
Thanks in advance for the feedback,
Tom
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