Wil,
Thanks for the reply. I will look up the module functions you reference.
Though, part of this was writing the custom function as a learning
exercise.
So if I have a file with the following in it and run it through ruby it
works.
require 'resolv'
Resolv::DNS.open do |dns|
ress = dns.getresources "google.com", Resolv::DNS::Resource::IN::A
if ress.any?
puts dns.getaddress("google.com")
end
end
To reference Mike's question. What I found was that 'if ress.any?' works
and that is what allows me to protect against malformed host names or a
failure to find an A record.
So I've already chopped out the puppet stuff, and this code works. So I'm
thinking that it must be something with the require statement, where it
isn't finding the library I need. But I'm not sure what I can do from here.
On Friday, October 3, 2014 2:00:27 AM UTC-4, Wil Cooley wrote:
>
>
> On Oct 2, 2014 10:23 AM, "Mark Rosedale" <[email protected] <javascript:>>
> wrote:
> >
> > I have the following custom function that I'm trying to write.
> >
>
> Sorry this isn't an answer to your question, but I recently published a
> module of functions wrapping the standard system get*by* functions (well,
> wrapping Ruby's interfaces to the standard system functions):
> https://forge.puppetlabs.com/wcooley/name_service_lookups
>
> This includes `gethostbyname` and `gethostbyaddr`; the main benefit over
> querying DNS directly is that it understands nsswitch, so /etc/hosts works
> and any other host database you might want to use.
>
> But assuming you want to implement this anyway an exercise in learning
> Ruby & Puppet extensions, you might start by removing all the Puppet stuff
> and just get the lookups working as a simple standalone Ruby script.
>
> Wil
>
> require 'resolv'
> >
> > module Puppet::Parser::Functions
> > newfunction(:getIpAddr, :type => :rvalue) do |arguments|
> > Resolv::DNS.open do |dns|
> > ress = dns.getresources(arguments[0], Resolv::DNS::Resource::IN::A)
> > if ress.any?
> > dns.getaddress(arguments[0])
> > #break
> > else
> > raise(Puppet::ParseError, "No valid A Record found for host
> #{aguments[0]}")
> > end
> > end
> > #return value
> > end
> > end
> >
> > I'm getting the following error when I run this function.
> >
> > Error: Could not retrieve catalog from remote server: Error 400 on
> SERVER: undefined local variable or method `dns' for
> #<Puppet::Parser::Scope:0x7f5054f07110> at
> >
> >
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