Synnefo » snf-ganeti

    self._ip_to_instance = {}

    for iname in self._config_data['instances']:

      instance = self._config_data['instances'][iname]

      for nic in instance['nics']:

        if 'ip' in nic and nic['ip']:

          self._ip_to_instance[nic['ip']] = iname

  def GetInstanceByIp(self, ip):

    if ip not in self._ip_to_instance:

      return None

    return self._ip_to_instance[ip]

  def GetNodePrimaryIp(self, node):

    """Get a node's primary ip

    @type node: string

    @param node: node name

    @rtype: string, or None

    @return: node's primary ip, or None if no such node

    """

    if node not in self._config_data["nodes"]:

      return None

    return self._config_data["nodes"][node]["primary_ip"]

  def GetInstancePrimaryNode(self, instance):

    """Get an instance's primary node

    @type instance: string

    @param instance: instance name

    @rtype: string, or None

    @return: primary node, or None if no such instance

    """

    if instance not in self._config_data["instances"]:

      return None

    return self._config_data["instances"][instance]["primary_node"]