ebs.rb

  execute "mkfs" do
    command "mkfs -t #{options[:fstype]} #{device}"
    
    not_if do
      # wait for the device
      loop do
        if File.blockdev?(device)
          Chef::Log.info("device #{device} ready")
          break
        else
          Chef::Log.info("device #{device} not ready - waiting")
          sleep 10
        end
      end
      # check volume filesystem
      system("blkid -s TYPE -o value #{device}")
    end    
  end