On Friday, 31 August 2018 16:41:34 UTC+1, Chadwick Banning wrote:
>
> So for this example, there are some sort of limitations as to what the
> 'vault_lookup' function is able to do internally? I had just assumed that
> as long as the function returned a simple value, what the function does
> internally was open.
>
> As an example, could Deferred be used to read and extract a value from a
> file agent-side?
>
In theory, you probably could. The ruby code probably just executes on the
Agent. Personally though if I were to find myself in this situation, I'd
really think about what I was trying to achieve and why I am in this
situation in the first place... Perhaps it's Puppet design that needs to
be refactored, or if I really wanted to "do" something on an Agent, a
Custom Type / Provider might be a better vehicle.
I can partially see the argument in proceeding posts for making decisions
on run time environment data... I'd argue that if you're writing a
Deferred Type in Ruby, it's not that much further to write a Fact. Also,
unit and acceptance testing code that relies on a run time Fact seems very
difficult.
On Fri, Aug 31, 2018 at 9:12 AM R.I.Pienaar <r...@devco.net <javascript:>>
> wrote:
>
>>
>>
>> On Fri, 31 Aug 2018, at 15:03, Chadwick Banning wrote:
>> > Would it be safe to consider this in a general context i.e. as enabling
>> > agent-side function execution?
>>
>> I dont think so - for general function calls to be usable you want to get
>> the value and then do some conditional logic on it. or put it in a
>> variable and use it in another resource etc.
>>
>> That is not what this is for, this is a based placeholder to later be
>> replaced by the value - you cannot do any conditionals etc with it.
>>
>> Imagine something like:
>>
>> mysql::user{"bob":
>> password => Deferred(vault_lookup, "bob_pass")
>> }
>>
>> (I am just making this syntax up, this is presumably not how it will look)
>>
>> Here its fine because its a simple interpolation into a value, you cant
>> do more complex things with this design.
>>
>> Anyway thats my understanding, Henrik might chime in too
>>
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>
>
> --
> Chadwick Banning
>
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