Class: Bosh::Director::Jobs::UpdateStemcell

Inherits:
BaseJob show all
Includes:
DownloadHelper, ValidationHelper
Defined in:
lib/bosh/director/jobs/update_stemcell.rb

Constant Summary collapse

UPDATE_STEPS = 
5

Instance Attribute Summary

Attributes inherited from BaseJob

#task_id

Class Method Summary collapse

Instance Method Summary collapse

Methods included from DownloadHelper

#download_remote_file

Methods included from ValidationHelper

#safe_property

Methods inherited from BaseJob

#begin_stage, #dns_manager, #event_manager, #logger, perform, #result_file, schedule_message, #single_step_stage, #task_cancelled?, #task_checkpoint, #track_and_log, #username

Constructor Details

#initialize(stemcell_path, options = {}) ⇒ UpdateStemcell

Returns a new instance of UpdateStemcell.

Parameters:

  • stemcell_path (String) —

    local path or remote url of the stemcell archive

  • options (Hash) (defaults to: {}) —

    Stemcell update options



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# File 'lib/bosh/director/jobs/update_stemcell.rb', line 20

def initialize(stemcell_path, options = {})
  if options['remote']
    # file will be downloaded to the stemcell_path
    @stemcell_path = File.join(Dir.tmpdir, "stemcell-#{SecureRandom.uuid}")
    @stemcell_url = stemcell_path
  else
    # file already exists at the stemcell_path
    @stemcell_path = stemcell_path
  end

  if options['sha1']
    @stemcell_sha1 = options['sha1']
  end

  @cloud = Config.cloud
  @stemcell_manager = Api::StemcellManager.new
  @fix = options['fix']
end

Class Method Details

.job_type ⇒ Object 



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# File 'lib/bosh/director/jobs/update_stemcell.rb', line 14

def self.job_type
  :update_stemcell
end

Instance Method Details

#perform ⇒ Object 



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# File 'lib/bosh/director/jobs/update_stemcell.rb', line 39

def perform
  logger.info("Processing update stemcell")

  begin_stage("Update stemcell", @stemcell_url ? UPDATE_STEPS + 1 : UPDATE_STEPS)

  track_and_log("Downloading remote stemcell") { download_remote_stemcell } if @stemcell_url

  stemcell_dir = Dir.mktmpdir("stemcell")

  track_and_log("Verifying remote stemcell") { verify_sha1 } if @stemcell_sha1

  track_and_log("Extracting stemcell archive") do
    result = Bosh::Exec.sh("tar -C #{stemcell_dir} -xzf #{@stemcell_path} 2>&1", :on_error => :return)
    if result.failed?
      logger.error("Extracting stemcell archive failed in dir #{stemcell_dir}, " +
                   "tar returned #{result.exit_status}, " +
                   "output: #{result.output}")
      raise StemcellInvalidArchive, "Extracting stemcell archive failed. Check task debug log for details."
    end
  end

  track_and_log("Verifying stemcell manifest") do
    stemcell_manifest_file = File.join(stemcell_dir, "stemcell.MF")
    stemcell_manifest = Psych.load_file(stemcell_manifest_file)

    @name = safe_property(stemcell_manifest, "name", :class => String)
    @operating_system = safe_property(stemcell_manifest, "operating_system", :class => String, :optional => true, :default => @name)
    @version = safe_property(stemcell_manifest, "version", :class => String)
    @cloud_properties = safe_property(stemcell_manifest, "cloud_properties", :class => Hash, :optional => true)
    @sha1 = safe_property(stemcell_manifest, "sha1", :class => String)

    logger.info("Found stemcell image '#{@name}/#{@version}', " +
                "cloud properties are #{@cloud_properties.inspect}")

    logger.info("Verifying stemcell image")
    @stemcell_image = File.join(stemcell_dir, "image")
    unless File.file?(@stemcell_image)
      raise StemcellImageNotFound, "Stemcell image not found"
    end
  end

  stemcell = nil
  track_and_log("Checking if this stemcell already exists") do
    begin
      stemcell = @stemcell_manager.find_by_name_and_version @name, @version
      raise StemcellAlreadyExists, "Stemcell '#{@name}/#{@version}' already exists" unless @fix
    rescue StemcellNotFound => e
      stemcell = Models::Stemcell.new
      stemcell.name = @name
      stemcell.operating_system = @operating_system
      stemcell.version = @version
      stemcell.sha1 = @sha1
    end
  end

  track_and_log("Uploading stemcell #{@name}/#{@version} to the cloud") do
    stemcell.cid = @cloud.create_stemcell(@stemcell_image, @cloud_properties)
    logger.info("Cloud created stemcell: #{stemcell.cid}")
  end

  track_and_log("Save stemcell #{@name}/#{@version} (#{stemcell.cid})") do
    stemcell.save
  end

  "/stemcells/#{stemcell.name}/#{stemcell.version}"
ensure
  FileUtils.rm_rf(stemcell_dir) if stemcell_dir
  FileUtils.rm_rf(@stemcell_path) if @stemcell_path
end