There's no way to do DNS lookups in a template with stock Puppet, but you can pretty easily write a custom function to do that for you. By default, Resolv will use the settings in /etc/resolv.conf, so as long as your nameservers are set up correctly on the puppetmaster, you shouldn't run into any problems.
Try plopping something like this into lib/puppet/parser/functions/get_ip_addr.rb in your module's directory: <a href="https://gist.github.com/3308273";>https://gist.github.com/3308273</a> require 'resolv' module Puppet::Parser::Functions newfunction(:get_ip_addr, :type => :rvalue) do |args| # Super sexy regex to match valid IPs ip_addr_re = /\b(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b/ hostname = args[0].strip if hostname =~ ip_addr_re then return hostname end begin Resolv::DNS.open { |dns| return dns.getaddress hostname } rescue Resolv::ResolvError return '' end end end Then you can call it in your template file as ```scope.function_get_ip_addr``` and it will either return the IP address for a hostname, the unchanged IP address for a valid IP address, and an empty string otherwise. I'm not sure what your hiera() calls are supposed to return, but assuming $webfarm ends up as a hash with keys http_servers and https_servers containing an array of hashes with keys host and port, you could do something like this: <% webfarm = scope.lookupvar 'foo::data::webfarm' %> <% webfarm['http_servers'].each do |server| %> <%= scope.function_get_ip_addr server['host'] %>:<%= server['port'] %> <% end %> On Thursday, August 9, 2012 1:38:14 PM UTC-7, Tim Mooney wrote: > Environment: puppet 2.7.14 on both master and all clients. We're also > > using puppetlabs-stdlib and hiera, if that matters. > > > > I know this is really more of a ruby/erb question, but I've been searching > > for a couple hours and haven't turned up anything relatively close to what > > I'm trying to do, and I'm hoping someone here has had to do this and can > > provide a suggestion for how to proceed. > > > > I'm generating a configuration file from a template. The configuration > > file will need to have IP addresses in it, but I would like to be able to > > use either hostnames or IP adresses in the puppet config. This means > > that I need to be able to resolve the hostnames and turn them into IP > > addresses, probably in the template itself. > > > > Basically, given something like this in puppet: > > > > class foo::data { > > > > $webfarm = { > > http_servers => hiera('webfarm_http_servers', [ > > { > > host => 'foo1.example.com', > > port => '80', > > }, > > { > > host => 'foo2.example.com', > > port => '80', > > }, > > { > > host => 'foo3.example.com', > > port => '80', > > }, > > ]), > > https_servers => hiera('webfarm_https_servers', [ > > { > > host => 'foo1.example.com', > > port => '443', > > }, > > { > > host => 'foo22.example.com', > > port => '443', > > }, > > { > > host => 'foo99.example.com', > > port => '443', > > }, > > ]), > > } > > } > > > > I need my template to iterate over the http_servers and https_servers > > arrays and resolve the values for the host key for each element. > > > > Anyone have an example of how to do this in a template? > > > > Thanks, > > > > Tim > > -- > > Tim Mooney tim.moo...@ndsu.edu > > Enterprise Computing & Infrastructure 701-231-1076 (Voice) > > Room 242-J6, IACC Building 701-231-8541 (Fax) > > North Dakota State University, Fargo, ND 58105-5164 On Thursday, August 9, 2012 1:38:14 PM UTC-7, Tim Mooney wrote: > Environment: puppet 2.7.14 on both master and all clients. We're also > > using puppetlabs-stdlib and hiera, if that matters. > > > > I know this is really more of a ruby/erb question, but I've been searching > > for a couple hours and haven't turned up anything relatively close to what > > I'm trying to do, and I'm hoping someone here has had to do this and can > > provide a suggestion for how to proceed. > > > > I'm generating a configuration file from a template. The configuration > > file will need to have IP addresses in it, but I would like to be able to > > use either hostnames or IP adresses in the puppet config. This means > > that I need to be able to resolve the hostnames and turn them into IP > > addresses, probably in the template itself. > > > > Basically, given something like this in puppet: > > > > class foo::data { > > > > $webfarm = { > > http_servers => hiera('webfarm_http_servers', [ > > { > > host => 'foo1.example.com', > > port => '80', > > }, > > { > > host => 'foo2.example.com', > > port => '80', > > }, > > { > > host => 'foo3.example.com', > > port => '80', > > }, > > ]), > > https_servers => hiera('webfarm_https_servers', [ > > { > > host => 'foo1.example.com', > > port => '443', > > }, > > { > > host => 'foo22.example.com', > > port => '443', > > }, > > { > > host => 'foo99.example.com', > > port => '443', > > }, > > ]), > > } > > } > > > > I need my template to iterate over the http_servers and https_servers > > arrays and resolve the values for the host key for each element. > > > > Anyone have an example of how to do this in a template? > > > > Thanks, > > > > Tim > > -- > > Tim Mooney tim.moo...@ndsu.edu > > Enterprise Computing & Infrastructure 701-231-1076 (Voice) > > Room 242-J6, IACC Building 701-231-8541 (Fax) > > North Dakota State University, Fargo, ND 58105-5164 -- You received this message because you are subscribed to the Google Groups "Puppet Users" group. 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