Synnefo » snf-ganeti

from ganeti import opcodes

           "USEUNITS_OPT", "FIELDS_OPT", "FORCE_OPT",

           "ListTags", "AddTags", "RemoveTags",

           ]

def _ExtractTagsObject(opts, args):

  """Extract the tag type object.

  Note that this function will modify its args parameter.

  """

  if not hasattr(opts, "tag_type"):

    raise errors.ProgrammerError("tag_type not passed to _ExtractTagsObject")

  kind = opts.tag_type

  if kind == constants.TAG_CLUSTER:

    retval = kind, kind

  elif kind == constants.TAG_NODE or kind == constants.TAG_INSTANCE:

    if not args:

      raise errors.OpPrereq("no arguments passed to the command")

    name = args.pop(0)

    retval = kind, name

  else:

    raise errors.ProgrammerError("Unhandled tag type '%s'" % kind)

  return retval

def ListTags(opts, args):

  """List the tags on a given object.

  This is a generic implementation that knows how to deal with all

  three cases of tag objects (cluster, node, instance). The opts

  argument is expected to contain a tag_type field denoting what

  object type we work on.

  """

  kind, name = _ExtractTagsObject(opts, args)

  op = opcodes.OpGetTags(kind=kind, name=name)

  result = SubmitOpCode(op)

  result = list(result)

  result.sort()

  for tag in result:

    print tag

def AddTags(opts, args):

  """Add tags on a given object.

  This is a generic implementation that knows how to deal with all

  three cases of tag objects (cluster, node, instance). The opts

  argument is expected to contain a tag_type field denoting what

  object type we work on.

  """

  kind, name = _ExtractTagsObject(opts, args)

  if not args:

    raise errors.OpPrereqError("No tags to be added")

  op = opcodes.OpAddTags(kind=kind, name=name, tags=args)

  SubmitOpCode(op)

def RemoveTags(opts, args):

  """Remove tags from a given object.

  This is a generic implementation that knows how to deal with all

  three cases of tag objects (cluster, node, instance). The opts

  argument is expected to contain a tag_type field denoting what

  object type we work on.

  """

  kind, name = _ExtractTagsObject(opts, args)

  if not args:

    raise errors.OpPrereqError("No tags to be removed")

  op = opcodes.OpDelTags(kind=kind, name=name, tags=args)

  SubmitOpCode(op)