Synnefo » snf-ganeti » ganeti-local

  def Modify(self, name, changes):

    """Modifies an entity within the storage unit.

    @type name: string

    @param name: Entity name

    @type changes: dict

    @param changes: New field values

    """

    # Don't raise an error if no changes are requested

    if changes:

      raise errors.ProgrammerError("Unable to modify the following"

                                   "fields: %r" % (changes.keys(), ))

  def _SetAllocatable(self, name, allocatable):

    """Sets the "allocatable" flag on a physical volume.

    @type name: string

    @param name: Physical volume name

    @type allocatable: bool

    @param allocatable: Whether to set the "allocatable" flag

    """

    args = ["pvchange", "--allocatable"]

    if allocatable:

      args.append("y")

    else:

      args.append("n")

    args.append(name)

    result = utils.RunCmd(args)

    if result.failed:

      raise errors.StorageError("Failed to modify physical volume,"

                                " pvchange output: %s" %

                                result.output)

  def Modify(self, name, changes):

    """Modifies flags on a physical volume.

    See L{_Base.Modify}.

    """

    if constants.SF_ALLOCATABLE in changes:

      self._SetAllocatable(name, changes[constants.SF_ALLOCATABLE])

      del changes[constants.SF_ALLOCATABLE]

    # Other changes will be handled (and maybe refused) by the base class.

    return _LvmBase.Modify(self, name, changes)