Synnefo » snf-ganeti

def _CheckBooleanOpField(op, name):

  """Validates boolean opcode parameters.

  This will ensure that an opcode parameter is either a boolean value,

  or None (but that it always exists).

  """

  val = getattr(op, name, None)

  if not (val is None or isinstance(val, bool)):

    raise errors.OpPrereqError("Invalid boolean parameter '%s' (%s)" %

                               (name, str(val)))

  setattr(op, name, val)

def _CheckNodeOnline(lu, node):

  """Ensure that a given node is online.

  @param lu: the LU on behalf of which we make the check

  @param node: the node to check

  @raise errors.OpPrereqError: if the nodes is offline

  """

  if lu.cfg.GetNodeInfo(node).offline:

    raise errors.OpPrereqError("Can't use offline node %s" % node)