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[fanxiujian <1927926@xxxxxxxxxxxxxxxxxx>]

** Changed in: neutron
       Status: In Progress => Invalid

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https://bugs.launchpad.net/bugs/1927926

Title:
  Ha port is not cleared when cleanup l3router ns

Status in neutron:
  Invalid

Bug description:
  Before deleting RouterNamespace, the related device will be delted.
  But only the prefixes 'rfp-' and 'qr-' and 'qg-' are deleted, 'ha-' has not been deleted.

  Because the ha device is not deleted, fd will continue to increase， If
  the time is too long, ovs will fail due to the limit of fd.

  
  class RouterNamespace(Namespace):

      def __init__(self, router_id, agent_conf, driver, use_ipv6):
          self.router_id = router_id
          name = self._get_ns_name(router_id)
          super(RouterNamespace, self).__init__(
              name, agent_conf, driver, use_ipv6)

      @classmethod
      def _get_ns_name(cls, router_id):
          return build_ns_name(NS_PREFIX, router_id)

      @check_ns_existence
      def delete(self):
          ns_ip = ip_lib.IPWrapper(namespace=self.name)
          for d in ns_ip.get_devices():
              if d.name.startswith(INTERNAL_DEV_PREFIX):
                  # device is on default bridge
                  self.driver.unplug(d.name, namespace=self.name,
                                     prefix=INTERNAL_DEV_PREFIX)
              elif d.name.startswith(ROUTER_2_FIP_DEV_PREFIX):
                  ns_ip.del_veth(d.name)
              elif d.name.startswith(EXTERNAL_DEV_PREFIX):
                  self.driver.unplug(
                      d.name,
                      namespace=self.name,
                      prefix=EXTERNAL_DEV_PREFIX)

          super(RouterNamespace, self).delete()

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