yum.ddl

metadata :name        => "Yum",
         :description => "Agent to manage packages using yum",
         :author      => "Reid Vandewiele",
         :license     => "Apache 2.0",
         :version     => "1.0",
         :timeout     => 60

action "checkupdate", :description => "Checks for available yum updates" do
     display :always

     output  :status,
             :description => "The status of available updates",
             :display_as  => "Updates Available",
             :default     => "unknown"
end

action "install", :description => "install a package with yum" do
     display :always

     input   :package,
             :prompt      => "Package Name",
             :description => "The package to install",
             :type        => :string,
             :validation  => '^[a-zA-Z\-_\d]+$',
             :optional    => false,
             :maxlength   => 30

     output  :status,
             :description => "The status of the package install",
             :display_as  => "Install Status",
             :default     => "unknown status"
end

yum.rb

module MCollective
  module Agent
    class Yum<RPC::Agent

      activate_when do
          Facts['osfamily'] == "RedHat"
      end

      action "checkupdate" do
        reply[:exitcode] = run("yum check-update",
          :stdout => :output,
          :stderr => :output,
          :chomp  => true
        )
        case reply[:exitcode]
          when 0
            reply[:status] = "No Updates Available"
          when 100
            reply[:status] = "Updates Available"
          else
            reply.fail! "UNKNOWN"
        end
      end
      
      action "install" do
        reply[:exitcode] = run("yum install #{request[:package]}",
          :stdout => :output,
          :stderr => :output,
          :chomp => true
        )
        case reply[:exitcode]
          when 0
            # noop, status is ok by default etc
          when 1
            reply.fail! "ERROR"
          else
            reply.fail! "UNKNOWN"
        end
      end

    end
  end
end