Hi Peter,
Thanks for that! I must have lost the = in translation from the old post,
I appreciate you 2nd set of eyes. Now that I'm passed that and have data
in the result, I've only graduated to having incorrect results. I had used
the any2array function to ensure the array status of the template output
and the blacklist param. The blacklist param will be delivered from and
ENC (specifically Foreman), and while it should work, I've had issues in
the past with arrays and hashes being taken as strings. That said, here's
what I see now:
$whitelist = [ foo::a, foo::b, foo::c, foo::d, foo::e ]
$blacklist = [ foo::c, foo::e ]
< apply corrected code, sending notifies for $whitelist, $blacklist, and
$include_list >
The notify outputs show that $include_list is identical to $whitelist. If
I actually attempt the include $include_list statement (which is usually
commented) I get duplicate resource definition errors since the blacklisted
classes create resources like package { 'apache': ensure => absent } and
the node's purpose might include being a webserver so we have another class
which manages the package resource for apache.
I've experimented with the parameter from the ENC, and how I define
whitelist in params.pp. I have tried several experiments with quoting the
array elements, with singles, with doubles, not quoting the elements, and
even defining them as strings, and allowing any2array to convert them
before the template. The outputs are different each time, but the result
is the same. The blacklist items still appear in the end result.
FWIW, I'm running puppet 3.6.2 on the agent and 3.8.2 on the master, I
assume you refer to current as the version 4 tree.
On Thursday, September 17, 2015 at 3:15:37 PM UTC-4, Peter Huene wrote:
>
> Hi Sean,
>
> On Thu, Sep 17, 2015 at 12:01 PM, Sean <smal...@gmail.com <javascript:>>
> wrote:
>
>> Hello,
>>
>> I have been working on trying to drive an include statement with an array
>> parameter.
>>
>> The idea looks like so (in pseudo code) :
>>
>>
>> class foo( $whitelist = $::foo::params::whitelist, $blacklist = [],) {
>>
>> $include_list = inline_template( "<% @whitelist - @blacklist %>" )
>> validate_array($include_list)
>> include $include_list
>>
>> }
>>
>> I picked up that inline template from a message in the group dating back
>> to 2011.
>>
>
> The template is missing a '=' character to write the result, like so:
>
> <%= @whitelist - @blacklist %>
>
> However, this will return a string-ified version of the array and is not
> what you want as include will treat it as a single class name.
>
> In the current version of the Puppet language, two arrays can simply be
> subtracted from one another:
>
> $whitelist = [foo, bar, baz]
> $blacklist = [bar]
> include $whitelist - $blacklist
>
> This would include "foo" and "baz", but not "bar".
>
>
>> Basically, class foo has a ton of subclasses who's names populate the
>> default value for $whitelist. Normally all these get applied, but I need
>> to allow for deviations for specific cases, thus the blacklist.
>>
>> The issue seems to be that no matter what I put in whitelist or
>> blacklist, include_list is always empty. What am I missing? I have also
>> tried writing a Custom Function to do the same as the inline template but
>> the result was not anymore successful, though the debugging was more
>> difficult.
>>
>> Thanks for your thoughts on this!
>>
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>
>
>
> --
> --
> Peter Huene
> Software Engineer, Puppet Labs
> Puppet Open Source Team
> -------------------------------------------
>
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> corner! Join us October 5-9 in Portland, OR. *
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>
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