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Foreman engine plugin that exposes smart class parameter lookups for any host and class.

Warning: this was written as a proof of concept. It has no authentication and should not be used in a production environment.

The ENC YAML output that Foreman generates only provides parameters for classes that are included on the node through the host or hostgroup records. However any smart class parameter can be evaluated for a host, so this exposes an API to do that.

It's designed to be used with the foreman_data_binding Puppet module, which uses this API to resolve class parameters using the matchers configured in Foreman. It effectively works in the same way as the Hiera integration in Puppet 3.

Get the foreman_data_binding module from Puppet Forge or GitHub.


Include in your ~foreman/bundler.d/foreman_param_lookup.rb

gem 'foreman_param_lookup'

Or from git:

gem 'foreman_param_lookup', :git => ""

As Foreman user:

bundle install

To upgrade to newest version of the plugin:

bundle update foreman_param_lookup

Don't forget to install the Puppet module to use that functionality.


The URL requires the host (that will be used as context for the smart class parameter lookup) and the class. It'll return all parameters for the class in YAML format.

$ curl http://foreman/param_lookup?
    param1: value
    param2: "another value"


Copyright (c) 2013 Red Hat Inc.

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see


Exposes smart class parameters lookups as an API




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