Hi All,

We have an openstack ansible stein version setup. We had a vm on it which we deleted. The associated neutron port was also deleted and the vm uuid is gone from the nova as well. It had a provider network ip.  Even after deleting the vm, we are still finding that ssh port 22 on that IP is responding. So I logged into the hypervisor (compute node) on which that vm was there before deletion and found that the libvirtd service was is error state with the following logs in the nova-compute service:

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2023-08-18 10:08:51.463 12587 INFO nova.service [-] Starting compute node (version 19.3.2)
2023-08-22 14:28:07.670 12587 ERROR nova.virt.libvirt.host     self.force_reraise()
2023-08-22 14:28:07.670 12587 ERROR nova.virt.libvirt.host   File "/openstack/venvs/nova-stein-em/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
2023-08-22 14:28:07.670 12587 ERROR nova.virt.libvirt.host     six.reraise(self.type_, self.value, self.tb)
2023-08-22 14:28:07.670 12587 ERROR nova.virt.libvirt.host   File "/openstack/venvs/nova-stein-em/lib/python2.7/site-packages/nova/virt/libvirt/host.py", line 442, in _get_connection
2023-08-22 14:28:07.670 12587 ERROR nova.virt.libvirt.host     self._wrapped_conn = self._get_new_connection()
2023-08-22 14:28:07.670 12587 ERROR nova.virt.libvirt.host   File "/openstack/venvs/nova-stein-em/lib/python2.7/site-packages/nova/virt/libvirt/host.py", line 396, in _get_new_connection
2023-08-22 14:28:07.670 12587 ERROR nova.virt.libvirt.host     wrapped_conn = self._connect(self._uri, self._read_only)
2023-08-22 14:28:07.670 12587 ERROR nova.virt.libvirt.host   File "/openstack/venvs/nova-stein-em/lib/python2.7/site-packages/nova/virt/libvirt/host.py", line 252, in _connect
2023-08-22 14:28:07.670 12587 ERROR nova.virt.libvirt.host     libvirt.openAuth, uri, auth, flags)
2023-08-22 14:28:07.670 12587 ERROR nova.virt.libvirt.host   File "/openstack/venvs/nova-stein-em/lib/python2.7/site-packages/eventlet/tpool.py", line 148, in proxy_call
2023-08-22 14:28:07.670 12587 ERROR nova.virt.libvirt.host     rv = execute(f, *args, **kwargs)
2023-08-22 14:28:07.670 12587 ERROR nova.virt.libvirt.host   File "/openstack/venvs/nova-stein-em/lib/python2.7/site-packages/eventlet/tpool.py", line 129, in execute
2023-08-22 14:28:07.670 12587 ERROR nova.virt.libvirt.host     six.reraise(c, e, tb)
2023-08-22 14:28:07.670 12587 ERROR nova.virt.libvirt.host   File "/openstack/venvs/nova-stein-em/lib/python2.7/site-packages/eventlet/tpool.py", line 83, in tworker
2023-08-22 14:28:07.670 12587 ERROR nova.virt.libvirt.host     rv = meth(*args, **kwargs)
2023-08-22 14:28:07.670 12587 ERROR nova.virt.libvirt.host   File "/openstack/venvs/nova-stein-em/lib/python2.7/site-packages/libvirt.py", line 104, in openAuth
2023-08-22 14:28:07.670 12587 ERROR nova.virt.libvirt.host     if ret is None:raise libvirtError('virConnectOpenAuth() failed')
2023-08-22 14:28:07.670 12587 ERROR nova.virt.libvirt.host libvirtError: Failed to connect socket to '/var/run/libvirt/libvirt-sock': Connection refused
2023-08-22 14:28:07.670 12587 ERROR nova.virt.libvirt.host
2023-08-22 14:28:07.676 12587 ERROR oslo_service.service [req-4108e9e2-2afd-472e-a4d9-fcccffc380dc - - - - -] Error starting thread.: HypervisorUnavailable: Connection to the hypervisor is broken on host
2023-08-22 14:28:07.676 12587 ERROR oslo_service.service Traceback (most recent call last):
2023-08-22 14:28:07.676 12587 ERROR oslo_service.service   File "/openstack/venvs/nova-stein-em/lib/python2.7/site-packages/oslo_service/service.py", line 810, in run_service
2023-08-22 14:28:07.676 12587 ERROR oslo_service.service     service.start()
2023-08-22 14:28:07.676 12587 ERROR oslo_service.service   File "/openstack/venvs/nova-stein-em/lib/python2.7/site-packages/nova/service.py", line 176, in start
2023-08-22 14:28:07.676 12587 ERROR oslo_service.service     self.manager.init_host()
2023-08-22 14:28:07.676 12587 ERROR oslo_service.service   File "/openstack/venvs/nova-stein-em/lib/python2.7/site-packages/nova/compute/manager.py", line 1225, in init_host
2023-08-22 14:28:07.676 12587 ERROR oslo_service.service     self.driver.init_host(host=self.host)
2023-08-22 14:28:07.676 12587 ERROR oslo_service.service   File "/openstack/venvs/nova-stein-em/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 503, in init_host
2023-08-22 14:28:07.676 12587 ERROR oslo_service.service     self._do_quality_warnings()
2023-08-22 14:28:07.676 12587 ERROR oslo_service.service   File "/openstack/venvs/nova-stein-em/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 471, in _do_quality_warnings
2023-08-22 14:28:07.676 12587 ERROR oslo_service.service     caps = self._host.get_capabilities()
2023-08-22 14:28:07.676 12587 ERROR oslo_service.service   File "/openstack/venvs/nova-stein-em/lib/python2.7/site-packages/nova/virt/libvirt/host.py", line 664, in get_capabilities
2023-08-22 14:28:07.676 12587 ERROR oslo_service.service     xmlstr = self.get_connection().getCapabilities()
2023-08-22 14:28:07.676 12587 ERROR oslo_service.service   File "/openstack/venvs/nova-stein-em/lib/python2.7/site-packages/nova/virt/libvirt/host.py", line 482, in get_connection
2023-08-22 14:28:07.676 12587 ERROR oslo_service.service     raise exception.HypervisorUnavailable()
2023-08-22 14:28:07.676 12587 ERROR oslo_service.service HypervisorUnavailable: Connection to the hypervisor is broken on host
2023-08-22 14:28:07.676 12587 ERROR oslo_service.service
2023-08-22 14:28:07.678 12587 INFO nova.virt.libvirt.driver [-] Connection event '0' reason 'Failed to connect to libvirt: Failed to connect socket to '/var/run/libvirt/libvirt-sock': Connection refused'

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However that particular neutron port for that vm is also deleted. We cant find it in the neutron db.

So how is it possible for that VM IP to be responding on port 22 even after it is deleted. Please help me here.

Thanks

Kumar