Synnefo » snf-ganeti

class LUQueryNodeData(NoHooksLU):

  """Logical unit for querying node data.

  """

  _OP_REQP = ["nodes"]

  def CheckPrereq(self):

    """Check prerequisites.

    This only checks the optional node list against the existing names.

    """

    self.wanted_nodes = _GetWantedNodes(self, self.op.nodes)

  def Exec(self, feedback_fn):

    """Compute and return the list of nodes.

    """

    ilist = [self.cfg.GetInstanceInfo(iname) for iname

             in self.cfg.GetInstanceList()]

    result = []

    for node in [self.cfg.GetNodeInfo(name) for name in self.wanted_nodes]:

      result.append((node.name, node.primary_ip, node.secondary_ip,

                     [inst.name for inst in ilist

                      if inst.primary_node == node.name],

                     [inst.name for inst in ilist

                      if node.name in inst.secondary_nodes],

                     ))

    return result