Synnefo » snf-ganeti

  def _ComputeAllNodes(self):

    """Compute the list of all nodes.

    Since the data is already there (in the drbd disks), keeping it as

    a separate normal attribute is redundant and if not properly

    synchronised can cause problems. Thus it's better to compute it

    dynamically.

    """

    def _Helper(nodes, device):

      """Recursively computes nodes given a top device."""

      if device.dev_type in constants.DTS_DRBD:

        nodea, nodeb = device.logical_id[:2]

        nodes.add(nodea)

        nodes.add(nodeb)

      if device.children:

        for child in device.children:

          _Helper(nodes, child)

    all_nodes = set()

    all_nodes.add(self.primary_node)

    for device in self.disks:

      _Helper(all_nodes, device)

    return tuple(all_nodes)

  all_nodes = property(_ComputeAllNodes, None, None,

                       "List of names of all the nodes of the instance")