Class: Bosh::Agent::Message::MountDisk

Inherits:
Base show all
Defined in:
lib/bosh_agent/message/mount_disk.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

#base_dir, #handler_error, #logger, #logs_dir, #settings, #store_migration_target, #store_path

Constructor Details

#initialize(args) ⇒ MountDisk

Returns a new instance of MountDisk.



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# File 'lib/bosh_agent/message/mount_disk.rb', line 11

def initialize(args)
  @cid = args.first
end

Class Method Details

.long_running? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/bosh_agent/message/mount_disk.rb', line 98

def self.long_running?; true; end

.process(args) ⇒ Object 



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# File 'lib/bosh_agent/message/mount_disk.rb', line 7

def self.process(args)
  new(args).mount
end

Instance Method Details

#mount ⇒ Object 



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# File 'lib/bosh_agent/message/mount_disk.rb', line 15

def mount
  if Bosh::Agent::Config.configure
    update_settings
    logger.info("MountDisk: #{@cid} - #{settings['disks'].inspect}")

    setup_disk
  end
end

#mount_persistent_disk(partition) ⇒ Object 



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# File 'lib/bosh_agent/message/mount_disk.rb', line 81

def mount_persistent_disk(partition)
  store_mountpoint = File.join(base_dir, 'store')

  if Pathname.new(store_mountpoint).mountpoint?
    logger.info("Mounting persistent disk store migration target")
    mountpoint = File.join(base_dir, 'store_migraton_target')
  else
    logger.info("Mounting persistent disk store")
    mountpoint = store_mountpoint
  end

  FileUtils.mkdir_p(mountpoint)
  FileUtils.chmod(0700, mountpoint)

  Mounter.new(logger).mount(partition, mountpoint)
end

#setup_disk ⇒ Object 



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# File 'lib/bosh_agent/message/mount_disk.rb', line 28

def setup_disk
  disk = Bosh::Agent::Config.platform.lookup_disk_by_cid(@cid)
  partition = "#{disk}1"

  logger.info("setup disk settings: #{settings.inspect}")

  read_disk_attempts = 300
  read_disk_attempts.downto(0) do |n|
    begin
      # Parition table is blank
      disk_data = File.read(disk, 512)

      if disk_data == "\x00"*512
        logger.info("Found blank disk #{disk}")
      else
        logger.info("Disk has partition table")
        logger.info(`sfdisk -Llq #{disk} 2> /dev/null`)
      end
      break
    rescue => e
      # Do nothing - we'll retry
      logger.info("Re-trying reading from #{disk}")
    end

    if n == 0
      raise Bosh::Agent::MessageHandlerError, "Unable to read from new disk"
    end
    sleep 1
  end

  if File.blockdev?(disk) && DiskUtil.ensure_no_partition?(disk, partition)
    full_disk = ",,L\n"
    logger.info("Partitioning #{disk}")

    Bosh::Agent::Util.partition_disk(disk, full_disk)

    mke2fs_options = ["-t ext4", "-j"]
    mke2fs_options << "-E lazy_itable_init=1" if Bosh::Agent::Util.lazy_itable_init_enabled?
    `/sbin/mke2fs #{mke2fs_options.join(" ")} #{partition}`
    unless $?.exitstatus == 0
      raise Bosh::Agent::MessageHandlerError, "Failed create file system (#{$?.exitstatus})"
    end
  elsif File.blockdev?(partition)
    logger.info("Found existing partition on #{disk}")
    # Do nothing
  else
    raise Bosh::Agent::MessageHandlerError, "Unable to format #{disk}"
  end

  mount_persistent_disk(partition)
  {}
end

#update_settings ⇒ Object 



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# File 'lib/bosh_agent/message/mount_disk.rb', line 24

def update_settings
  Bosh::Agent::Config.settings = Bosh::Agent::Settings.load
end