On Friday, December 13, 2013 3:56:50 PM UTC-6, Joseph Swick wrote:
[...]
What am I missing to get Puppet to evaluate the $resourceX_type
> variables as a resource type [e.g: File, Service, etc.] to get this to
> work?
Puppet DSL does not provide such a feature. It is conceivable -- likely,
even -- that you could instead create a custom function to apply generic
ordering constraints such as you want but you should beware that unlike
relationships declared via the DSL, relationships applied via a function
would probably be sensitive to manifest evaluation order.
> I'd like to try do it this way so that I don't have to make a
> very long, messy and hard to maintain class with a lot of nested case
> statements to perform a similar function. That is, unless there's some
> other method that I haven't considered/found/thought of.
>
> sample nested case code (this will get ugly fast and isn't very flexible):
> case $resource1_type {
> 'File': {
> case $resource2_type {
> 'Service': {
> if $notify {
> File[$resource1_name] ~> Service[$resource2_name]
> } else {
> File[$resource1_name] -> Service[$resource2_name]
> }
> }
> default: {fail("Unknown resource type '${resource2_type}' for
> \$resource2_type")}
> }
> }
> default: {fail("Unknown resource type '${resource1_type}' for
> \$resource1_type")}
> }
>
>
I suspect that the use case for the functionality you describe is not
nearly so general as you suppose. Module portability is more typically
approached in Puppet by using facts -- custom facts, if necessary -- to
probe the relevant characteristics of the target machine, and by using a
small number of higher-level alternatives to determine what to declare.
For example, it is common to use the $::osfamily fact to guide what
declarations to make, coding appropriate specifics for each supported OS
family.
John
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