Module: MiqOpenStackCommon

Included in:
MiqOpenStackImage, MiqOpenStackInstance
Defined in:
lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackCommon.rb

Instance Method Summary collapse

Instance Method Details

#create_image_from_snapshot(snapshot_id, disk_format) ⇒ Object 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackCommon.rb', line 57

def create_image_from_snapshot(snapshot_id, disk_format)
  snapshot = volume_service.snapshots.get(snapshot_id)
  volume_options = {
    :name        => "Temp Volume from #{snapshot.name}",
    :size        => snapshot.size,
    :snapshot_id => snapshot_id
  }
  volume = volume_service.volumes.new(volume_options)
  volume.save

  while volume.status != 'available'
    sleep(10)
    volume = volume_service.volumes.get(volume.id)
  end

  response = volume_service.action(volume.id, 'os-volume_upload_image' => {
                                     :image_name => "Temp Image from #{snapshot.name}",
                                     :disk_format => disk_format})
  image_id = response.body["os-volume_upload_image"]["image_id"]

  while image_service.images.get(image_id).status.downcase != 'active'
    sleep(10)
  end

  $log.debug "#{log_prefix}: Deleting temp volume #{volume.name} in #{volume.status} status"
  volume.destroy

  return image_service.images.get(image_id)
rescue => ex
  $log.error "#{log_prefix}: Create image from Snapshot step raised error"
  $log.error ex
end

#disk_format(snapshot_image_id) ⇒ Object 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackCommon.rb', line 10

def disk_format(snapshot_image_id)
  send("disk_format_glance_#{image_service.version}", snapshot_image_id)
end

#disk_format_glance_v1(snapshot_image_id) ⇒ Object 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackCommon.rb', line 2

def disk_format_glance_v1(snapshot_image_id)
  image_service.get_image(snapshot_image_id).headers['X-Image-Meta-Disk_format']
end

#disk_format_glance_v2(snapshot_image_id) ⇒ Object 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackCommon.rb', line 6

def disk_format_glance_v2(snapshot_image_id)
  image_service.images.get(snapshot_image_id).disk_format
end

#download_image_data_glance_v2(image) ⇒ Object 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackCommon.rb', line 21

def download_image_data_glance_v2(image)
  log_prefix = "#{self.class.name}##{__method__}"

  image_id = image.id
  iname = image.name
  isize = image.size.to_i
  $log.debug "#{log_prefix}: iname = #{iname}"
  $log.debug "#{log_prefix}: isize = #{isize}"

  raise "Image: #{iname} (#{image_id}) is empty" unless isize > 0
  tot = 0
  tf = MiqTempfile.new(iname, :encoding => 'ascii-8bit')
  $log.debug "#{log_prefix}: saving image to #{tf.path}"
  response_block = lambda do |buf, _rem, sz|
    tf.write buf
    tot += buf.length
    $log.debug "#{log_prefix}: response_block: #{tot} bytes written of #{sz}"
  end

  _rv = image.download_data(:response_block => response_block)
  tf.close

  # TODO(lsmola) Fog download_data doesn't support header returned, it returns body by hard. We need to wrap the
  # result load_response like in Fog::OpenStack::Collection. The header will be accessible as rv.response.headers
  # checksum = rv.headers['Content-Md5']
  # $log.debug "#{log_prefix}: Checksum: #{checksum}" if $log.debug?
  $log.debug "#{log_prefix}: #{`ls -l #{tf.path}`}" if $log.debug?

  if tf.size != isize
    $log.error "#{log_prefix}: Error downloading image #{iname}"
    $log.error "#{log_prefix}: Downloaded size does not match image size #{tf.size} != #{isize}"
    raise "Image download failed"
  end
  tf
end

#get_image_file_common(image_id) ⇒ Object 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackCommon.rb', line 164

def get_image_file_common(image_id)
  send("get_image_file_glance_#{image_service.version}", image_id)
end

#get_image_file_glance_v1(image_id) ⇒ Object 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackCommon.rb', line 114

def get_image_file_glance_v1(image_id)
  log_prefix = "#{self.class.name}##{__method__}"

  image = image_service.get_image(image_id)
  raise "Image #{image_id} not found" unless image
  $log.debug "#{log_prefix}: image = #{image.class.name}"

  iname = image.headers['X-Image-Meta-Name']
  isize = image.headers['X-Image-Meta-Size'].to_i
  $log.debug "#{log_prefix}: iname = #{iname}"
  $log.debug "#{log_prefix}: isize = #{isize}"

  raise "Image: #{iname} (#{image_id}) is empty" unless isize > 0

  tot = 0
  tf = MiqTempfile.new(iname, :encoding => 'ascii-8bit')
  $log.debug "#{log_prefix}: saving image to #{tf.path}"
  response_block = lambda do |buf, _rem, sz|
    tf.write buf
    tot += buf.length
    $log.debug "#{log_prefix}: response_block: #{tot} bytes written of #{sz}"
  end

  #
  # We're calling the low-level request method here, because
  # the Fog "get image" methods don't currently support passing
  # a response block. We should attempt to remedy this in Fog
  # upstream and modify this code accordingly.
  #
  rv = image_service.request(
    :expects        => [200, 204],
    :method         => 'GET',
    :path           => "images/#{image_id}",
    :response_block => response_block
  )

  tf.close

  checksum = rv.headers['X-Image-Meta-Checksum']
  $log.debug "#{log_prefix}: Checksum: #{checksum}" if $log.debug?
  $log.debug "#{log_prefix}: #{`ls -l #{tf.path}`}" if $log.debug?

  if tf.size != isize
    $log.error "#{log_prefix}: Error downloading image #{iname}"
    $log.error "#{log_prefix}: Downloaded size does not match image size #{tf.size} != #{isize}"
    raise "Image download failed"
  end
  tf
end

#get_image_file_glance_v2(image_id) ⇒ Object 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackCommon.rb', line 90

def get_image_file_glance_v2(image_id)
  log_prefix = "#{self.class.name}##{__method__}"

  image = image_service.images.get(image_id)
  raise "Image #{image_id} not found" unless image
  $log.debug "#{log_prefix}: image = #{image.class.name}"

  if image.size.to_i == 0
    # try getting image from metadata; oddly the image metadata is only available if
    # image is queried through compute service
    unless (snapshot_id = get_image_metadata_snapshot_id(compute_service.images.get(image_id))).nil?
      temp_image = create_image_from_snapshot(snapshot_id, image.disk_format)
      begin
        tf = download_image_data_glance_v2(temp_image)
      ensure
        temp_image.destroy
      end
    end
  else
    tf = download_image_data_glance_v2(image)
  end
  tf
end

#get_image_metadata_snapshot_id(image) ⇒ Object 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackCommon.rb', line 14

def get_image_metadata_snapshot_id(image)
  image.metadata.each do |m|
    next if m.key != "block_device_mapping"
    return m.value[0]['snapshot_id']
  end 
end