This can be achieved without stages if you put the relationship inside
site.pp outside any class scope.
On Friday, May 10, 2013 8:25:58 AM UTC-6, jcbollinger wrote:
>
>
>
> On Thursday, May 9, 2013 10:23:25 PM UTC-5, Nan Liu wrote:
>>
>> On Thu, May 9, 2013 at 11:52 AM, James Kyle <li...@jameskyle.org> wrote:
>>
>>> I've run into several incidences where a module attempts to install a
>>> package before the apt::source is added or an update is run. Result is a
>>> bunch apt errors and explosions.
>>>
>>> Basically what should be done is all the apt::sources are added and and
>>> an update run _before_ any packages are installed to ensure you're pulling
>>> from the repos you want.
>>>
>>> I've gone through several iterations in my attempt to achieve that
>>> behavior. The one that works best so far is stages and wrapper classes.
>>> Here's a terse example of what it looks like:
>>>
>>> class myorg::common {
>>> include stdlib
>>>
>>> Apt::Source {stage => "setup"}
>>>
>>> apt::source { 'puppetlabs':
>>> location => 'http://apt.puppetlabs.com',
>>> repos => 'main',
>>> key => '4BD6EC30',
>>> key_server => 'pgp.mit.edu',
>>> }
>>>
>>> Exec['apt_update'] -> Package<| title != 'ubuntu-cloud-keyring' |>
>>> }
>>>
>>> node 'foo.bar.com' {
>>> include stdlib
>>>
>>> class {'myorg::common': stage => "setup"}
>>> }
>>>
>>>
>>> One thing that bothers me is you have to declare the stage for
>>> myorg::common in every node that uses it. And as the name implies, that's
>>> every node.
>>>
>>> Is there a way to get rid of that duplication? I've thought of node
>>> inheritance, but the docs seem to strongly steer you away from that pattern.
>>>
>>
>> Doesn't the relationship do the right thing without stages?
>>
>
>
> It would depend on whether and how stages are used elsewhere in the
> manifest set. With stages it's often "in for a penny, in for a pound."
> Generally speaking, though, it should be possible to do this sort of thing
> (or anything, actually) without stages.
>
>
>
>> Does this work?
>>
>> class myorg::common (
>> $staging = 'setup',
>> ) { ...
>>
>> Nan
>>
>
>
> Provided that all of the relevant Apt sources are managed via Apt:::Source
> resources, and that no virtual Apt::Source or Package resources are
> declared without elsewhere being realized, this declaration should work:
>
> Apt::Source<| |> -> Exec['apt_update'] -> Package<| |>
>
> That declaration is not itself affected by or dependent on stages, but it
> is possible for the referenced resources to be assigned to stages in such a
> way that the chain closes one or more dependency cycles. Such cycles would
> reflect an error in the stage assignments, however, for the chain
> expression succinctly and precisely describes the requested resource
> application order; as long as it does so, it *defines* the correct
> orders. It would be sufficient to make that declaration once, in some
> central place, but not harmful to make it multiple times.
>
> There are all manner of tweaks and accommodations that could be applied to
> handle special cases, such as when there are virtual Apt::Source or Package
> resources must remain unrealized, but the chain above captures the
> essential essence of the required declaration.
>
>
> John
>
>
>
>
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