mdadm LWRP :create override

mdadm_default.rb

action :create do
  unless @current_resource.exists
    command = "yes | mdadm --create #{@new_resource.raid_device} --chunk=#{@new_resource.chunk} --level #{@new_resource.level} --raid-devices #{@new_resource.devices.length} #{@new_resource.devices.join(" ")}"
    # Check the mdadm raid registry
    # Existing raids will show as active or inactive
    # Take the name of the raid array
    find_current_raid_arrays_command = "cat /proc/mdstat | grep active | awk '{print $1}'"
    Chef::Log.debug("#{@new_resource} mdadm command: #{command}")
    attempts = 0
    previous_raid_arrays = shell_out!(find_current_raid_arrays_command).stdout.split()
    Chef::Log.debug("#{@new_resource} Previous Raid Arrays: #{previous_raid_arrays}")
    begin
      create_array = shell_out!(command)
    rescue Exception
      attempts += 1
      # Sometimes a blkid process will be tying up the resource after mdadm usage, it should clear quickly
      sleep(1)
      current_raid_arrays = shell_out!(find_current_raid_arrays_command).stdout.split()
      Chef::Log.debug("Current Raid Arrays: #{current_raid_arrays}")
      failed_raid_arrays = current_raid_arrays - previous_raid_arrays
      Chef::Log.debug("Failed Raid Arrays: #{failed_raid_arrays}")
      failed_raid_arrays.each do |raid_array|
        stop_raid_array_command = "mdadm --stop /dev/#{raid_array}"
        stop_raid_array = shell_out!(stop_raid_array_command)
        Chef::Log::debug("#{@new_resource} Attempting to stop failed arrays: #{stop_raid_array.stdout}")
      end
      Chef::Log::info("#{@new_resource} mdadm raid creation failed. Performing retry #{attempts} out of #{@new_resource.attempts}")
      sleep(1)
      retry unless attempts > @new_resource.attempts
    end
    Chef::Log.info("#{@new_resource} created raid device (#{@new_resource.raid_device})")

    # Avoid issue where it may show as /dev/md0 or /dev/md/0
    raid_uuid_command = "mdadm --detail --scan | sed 's:/::g'  | grep #{new_resource.raid_device.gsub('/', '')} | awk -F 'UUID=' '{print $2}' | awk '{print $1}'"
    raid_uuid = shell_out!(raid_uuid_command).stdout

    raid_config_command = "mdadm --detail --scan | grep #{raid_uuid}"
    raid_config = shell_out!(raid_config_command).stdout

    persist_raid_config_command = "/usr/share/mdadm/mkconf > /etc/mdadm/mdadm.conf"
    shell_out!(persist_raid_config_command)

    Chef::Log.info("#{@new_resource} added raid device configuration (#{raid_config})")

    update_initramfs_command = "update-initramfs -u"
    shell_out!(update_initramfs_command)

    Chef::Log.info("#{@new_resource} updated initramfs image")

    @new_resource.updated_by_last_action(true)
  else
    Chef::Log.debug("#{@new_resource} raid device already exists, skipping create (#{@new_resource.raid_device})")
  end

  new_resource.updated_by_last_action(true)

end