Comment 1 for bug 1886540

I'm seeing the same in this testrun: https://solutions.qa.canonical.com/testruns/testRun/9f614214-d21f-4485-a120-fa0294f98207 but with a different cause:

```
unit-nova-compute-0: 19:48:51 WARNING unit.nova-compute/0.secrets-storage-relation-changed File "/var/lib/juju/agents/unit-nova-compute-0/charm/hooks/charmhelpers/contrib/openstack/vaultlocker.py", line 176, in retrieve_secret_id
unit-nova-compute-0: 19:48:51 WARNING unit.nova-compute/0.secrets-storage-relation-changed response = client._post('/v1/sys/wrapping/unwrap')
unit-nova-compute-0: 19:48:51 WARNING unit.nova-compute/0.secrets-storage-relation-changed File "/usr/lib/python3/dist-packages/hvac/v1/__init__.py", line 1239, in _post
unit-nova-compute-0: 19:48:51 WARNING unit.nova-compute/0.secrets-storage-relation-changed return self.__request('post', url, **kwargs)
unit-nova-compute-0: 19:48:51 WARNING unit.nova-compute/0.secrets-storage-relation-changed File "/usr/lib/python3/dist-packages/hvac/v1/__init__.py", line 1263, in __request
unit-nova-compute-0: 19:48:51 WARNING unit.nova-compute/0.secrets-storage-relation-changed response = self.session.request(method, url, headers=headers,
unit-nova-compute-0: 19:48:51 WARNING unit.nova-compute/0.secrets-storage-relation-changed File "/usr/lib/python3/dist-packages/requests/sessions.py", line 533, in request
unit-nova-compute-0: 19:48:51 WARNING unit.nova-compute/0.secrets-storage-relation-changed resp = self.send(prep, **send_kwargs)
unit-nova-compute-0: 19:48:51 WARNING unit.nova-compute/0.secrets-storage-relation-changed File "/usr/lib/python3/dist-packages/requests/sessions.py", line 646, in send
unit-nova-compute-0: 19:48:51 WARNING unit.nova-compute/0.secrets-storage-relation-changed r = adapter.send(request, **kwargs)
unit-nova-compute-0: 19:48:51 WARNING unit.nova-compute/0.secrets-storage-relation-changed File "/usr/lib/python3/dist-packages/requests/adapters.py", line 516, in send
unit-nova-compute-0: 19:48:51 WARNING unit.nova-compute/0.secrets-storage-relation-changed raise ConnectionError(e, request=request)
unit-nova-compute-0: 19:48:51 WARNING unit.nova-compute/0.secrets-storage-relation-changed requests.exceptions.ConnectionError: HTTPConnectionPool(host='vault-internal.silo2.lab0.solutionsqa', port=8200): Max retries exceeded with url: /v1/sys/wrapping/unwrap (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f2e931c8340>: Failed to establish a new connection: [Errno -2] Name or service not known'))
unit-nova-compute-0: 19:48:51 ERROR juju.worker.uniter.operation hook "secrets-storage-relation-changed" (via explicit, bespoke hook script) failed: exit status 1
```