On Tue, Jan 26, 2016 at 6:16 AM, jcbollinger <john.bollin...@stjude.org>
wrote:
>
>
> On Monday, January 25, 2016 at 5:48:18 PM UTC-6, Diego Roccia wrote:
>>
>> Hi
>>
>> I'm migrating my puppet configuration from 3.6 to v4.2, but I'm having
>> some problem with ip type facts. For example, I have this line :
>>
>> priority => inline_template('<%= 256 -
>> ipaddress.split(".")[3].to_i %>')
>>
>> on puppet 3.6 and it works, putting there the last octet of my ip
>> address. on puppet 4.2 I get:
>>
>> ==> node-1: Error: Evaluation Error: Error while evaluating a Function
>> Call, Failed to parse inline template: undefined local variable or method
>> `ipaddress' for #<Puppet::Parser::TemplateWrapper:0x00000003d44628> at
>> /tmp/vagrant-puppet/environments/test/manifests/default.pp:25:16 on node
>> node-1.station
>>
>> I think it depends on the new facts being no longer strings.
>>
>
>
> It is apparently true that in Facter 3, $ipaddress is of type 'ip' rather
> than of type string, but "undefined" is very different from "incorrect
> type".
>
The `ipaddress` fact should still be a string. I think the confusion lies
in the schema calling it an "ip", which is really just a regular expression
that confines the string to a particular format, e.g. an IPv4 address). If
you observe the `ipaddress` fact to be any other type please let us know,
as that would be a serious regression.
>
>
>
>> in facts this works:
>>
>> file { "/var/lib/zookeeper/myid":
>> ensure =>
>> present,
>>
>> content => "${ipaddress}"
>> }
>>
>> my file contains the whole ip address, but with this:
>>
>> file { "/var/lib/zookeeper/myid":
>> ensure =>
>> present,
>>
>> content => "${ipaddress.split('.')[3]}"
>> }
>>
>>
> the file is empty
>>
>
>
> As far as I am aware, that last form shouldn't work at all. Unlike Ruby
> values, Puppet values do not have methods, unless you count array and hash
> indexing. You cannot split a string like that (even if $ipaddress were a
> string).
>
Puppet 4 supports two different function call expressions: `foo(bar)` and
`bar.foo()`, where the latter form is called the "method call" expression.
As John said, Puppet doesn't have "methods" in the Ruby sense, only free
functions, so calls with the "method call" form are simply translated into
calling a free function with the same name (e.g. `foo`), passing the target
operand (e.g. `bar`) as the first argument to the function. I hope that
makes sense.
>
>
>
>> any idea?
>>
>>
> In Puppet 3.6 you could access Puppet variables, including facts, via
> their bare names, but that form was deprecated well before the end of the
> 3.x series. In ERB templates you should instead use the form @variable
> to access in-scope variables; this works in 3.x, too. You can also use
> the scope object to access variables, including (counter-intuitively)
> those that are not in scope inside the template. More details are
> available in the templating docs
> <https://docs.puppetlabs.com/puppet/latest/reference/lang_template_erb.html#accessing-puppet-variables>
> .
>
> I'm not actually sure where to find any documentation on the type 'ip'
> that legacy fact $ipaddress now has, but you could try indexing into it
> as if it were an array of integers:
>
> priority => inline_template('<%= 256 - @ipaddress.[3] %>')
>
> Failing that, the value's stringification seems to be the same as the old
> string value, so you could very likely do this:
>
> priority => inline_template('<%= 256 - @ipaddress.to_s.split(".")[3].to_i
> %>')
>
>
> John
>
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