Synnefo » snf-ganeti

  def SetPhysicalID(self, target_node, nodes_ip):

    """Convert the logical ID to the physical ID.

    This is used only for drbd, which needs ip/port configuration.

    The routine descends down and updates its children also, because

    this helps when the only the top device is passed to the remote

    node.

    Arguments:

      - target_node: the node we wish to configure for

      - nodes_ip: a mapping of node name to ip

    The target_node must exist in in nodes_ip, and must be one of the

    nodes in the logical ID for each of the DRBD devices encountered

    in the disk tree.

    """

    if self.children:

      for child in self.children:

        child.SetPhysicalID(target_node, nodes_ip)

    if self.logical_id is None and self.physical_id is not None:

      return

    if self.dev_type in constants.LDS_DRBD:

      pnode, snode, port = self.logical_id

      if target_node not in (pnode, snode):

        raise errors.ConfigurationError("DRBD device not knowing node %s" %

                                        target_node)

      pnode_ip = nodes_ip.get(pnode, None)

      snode_ip = nodes_ip.get(snode, None)

      if pnode_ip is None or snode_ip is None:

        raise errors.ConfigurationError("Can't find primary or secondary node"

                                        " for %s" % str(self))

      if pnode == target_node:

        self.physical_id = (pnode_ip, port,

                            snode_ip, port)

      else: # it must be secondary, we tested above

        self.physical_id = (snode_ip, port,

                            pnode_ip, port)

    else:

      self.physical_id = self.logical_id

    return