Open Stack

Hi,

We had a few Magnum (K8s) clusters created a couple of years ago (with 
Rocky and Stein versions) and forgotten. We started to delete them this 
spring when we where running Train Neutron service. Basically we managed 
to do this with the following sequence:

- openstack coe cluster delete xxx and waiting for DELETE_FAILED
- Use openstack coe cluster show / openstack stack resource list -n2 to 
identify the neutron entry causing the error and pick the corresponding 
resource ID
- Find the ports associated with the router with openstack port list 
--router previously_found_id
- Use the port subnet to find the port corresponding lbaas load balancer 
ID, use the neutron CLI to delete the load balancer (deleting one by one 
all the dependencies preventing the load balancer removal)
- Rerun openstack coe cluster delete

For some reasons, we didn't cleanup all the abandoned clusters and 
upgraded Neutron to Ussuri. Unfortunately, since then our previous 
process is no longer working as it seems that the Neutron server doesn't 
know anymore anything about the LBAAS load balancers (and "neutron 
lbaas-loadbalancer list" returns nothing). In the neutron server, any 
attempt to delete the subnet attached to the load balancer (or to list 
them with Neutron CLI) results in the following errors in Neutron 
server.log :

------

2023-07-07 16:27:31.139 14962 WARNING 
neutron.pecan_wsgi.controllers.root 
[req-71e712fc-d8a7-4815-90b3-b406c10e0caa 
a2b4a88cfee0c18702fe89ccb07ae875de3f34f3f1bb43e505fd83aebcfc094c 
245bc968c1b7465dac1b93a30bf67ba9 - 1367c9a4d5da4b229c35789c271dc7aa 
1367c9a4d5da4b229c35789c271dc7aa] No controller found for: lbaas - 
returning response code 404: pecan.routing.PecanNotFound
2023-07-07 16:27:31.140 14962 INFO neutron.pecan_wsgi.hooks.translation 
[req-71e712fc-d8a7-4815-90b3-b406c10e0caa 
a2b4a88cfee0c18702fe89ccb07ae875de3f34f3f1bb43e505fd83aebcfc094c 
245bc968c1b7465dac1b93a30bf67ba9 - 1367c9a4d5da4b229c35789c271dc7aa 
1367c9a4d5da4b229c35789c271dc7aa] GET failed (client error): The 
resource could not be found.
2023-07-07 16:27:31.141 14962 INFO neutron.wsgi 
[req-71e712fc-d8a7-4815-90b3-b406c10e0caa 
a2b4a88cfee0c18702fe89ccb07ae875de3f34f3f1bb43e505fd83aebcfc094c 
245bc968c1b7465dac1b93a30bf67ba9 - 1367c9a4d5da4b229c35789c271dc7aa 
1367c9a4d5da4b229c35789c271dc7aa] 157.136.249.153 "GET 
/v2.0/lbaas/loadbalancers?name=kube_service_964f7e76-d2d5-4126-ab11-cd689f6dd9f9_runnerdeploy-wm9sm-5h52l_hello-node-x-default-x-runnerdeploy-wm9sm-5h52l 
HTTP/1.1" status: 404  len: 304 time: 0.0052643
------

Any suggestion to workaround this problem and be able to successfully 
delete our old Magnum clusters?

Thanks in advance for any help. Best regards,

Michel