Description of problem:

In case a namespace is created-deleted-created, the last namespace creation event notices that a KuryrNet CRD still exists, as it can take a while for the previous deletion event to complete and will trigger again another deletion causing the following NotFound SubPort on Trunk error:

namespace_subnet [-] Port d93da41a-4e9a-4140-ab08-a26bd10d775f is in DOWN status but still associated to a trunk. This should not happen. Trying to delete it from the t
runk.: Conflict: Port d93da41a-4e9a-4140-ab08-a26bd10d775f is currently a subport for trunk e69bb33f-2efc-45c7-9bfd-cd68980b5f28.
2019-11-25 20:35:44.577 1 DEBUG kuryr_kubernetes.controller.managers.health [-] Kuryr Controller Liveness verified. liveness_status /usr/lib/python2.7/site-packages/kuryr_kubernetes/controller/managers/health.py:111
2019-11-25 20:35:44.577 1 INFO werkzeug [-] 192.168.99.29 - - [25/Nov/2019 20:35:44] "GET /alive HTTP/1.1" 200 -
2019-11-25 20:35:44.607 1 DEBUG neutronclient.v2_0.client [-] Error message: {"NeutronError": {"message": "Port d93da41a-4e9a-4140-ab08-a26bd10d775f is currently a subport for trunk e69bb33f-2efc-45c7-9bfd-cd68980b5f28.", "type": "PortInU
seAsSubPort", "detail": ""}} _handle_fault_response /usr/lib/python2.7/site-packages/neutronclient/v2_0/client.py:259
2019-11-25 20:35:44.607 1 WARNING kuryr_kubernetes.controller.drivers.namespace_subnet [-] Port d93da41a-4e9a-4140-ab08-a26bd10d775f is in DOWN status but still associated to a trunk. This should not happen. Trying to delete it from the t
runk.: Conflict: Port d93da41a-4e9a-4140-ab08-a26bd10d775f is currently a subport for trunk e69bb33f-2efc-45c7-9bfd-cd68980b5f28.
2019-11-25 20:35:44.672 1 DEBUG neutronclient.v2_0.client [-] Error message: {"NeutronError": {"message": "SubPort on trunk e69bb33f-2efc-45c7-9bfd-cd68980b5f28 with parent port d93da41a-4e9a-4140-ab08-a26bd10d775f could not be found.", "
type": "SubPortNotFound", "detail": ""}} _handle_fault_response /usr/lib/python2.7/site-packages/neutronclient/v2_0/client.py:259
2019-11-25 20:35:44.673 1 ERROR kuryr_kubernetes.handlers.retry [-] Report handler unhealthy NamespaceHandler: NotFound: SubPort on trunk e69bb33f-2efc-45c7-9bfd-cd68980b5f28 with parent port d93da41a-4e9a-4140-ab08-a26bd10d775f could not
 be found.
Version-Release number of selected component (if applicable):


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