Ohai dns(nameserves) Plugin

nameservers.rb

require 'json'

Ohai.plugin(:Nameservers) do
  provides "network/nameservers"

  depends "network"

  collect_data do
    Ohai::Log.debug('Parsing resolv.conf for nameservers.')
    nameservers = []
    # Find all the nameserver values in /etc/resolv.conf
    File.open("/etc/resolv.conf", "r").each_line do |line|
      if line =~ /^nameserver\s*(\S*)/
        nameservers << $1
      end
    end

    # If we can't get any result (bad host config?) default to a
    # public DNS server that is likely to be reachable.
   if nameservers.empty?
      Ohai::Log.debug('No nameservers found in resolv.conf.')
      nameservers << '8.8.8.8'
    end

    network[:nameservers] = nameservers

  end
end