Comment 0 for bug 2062819

Running a deployment of Jammy Yoga on the stable channels (yoga/stable) with juju 3.1.8 and vault on the channel 1.7/stable , a non leader, failed on the leader-setting-changed hook.

The juju logs from the unit show:
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 Traceback (most recent call last):
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 File "/var/lib/juju/agents/unit-vault-0/charm/hooks/leader-settings-changed", line 22, in <module>
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 main()
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 File "/var/lib/juju/agents/unit-vault-0/.venv/lib/python3.8/site-packages/charms/reactive/__init__.py", line 74, in main
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 bus.dispatch(restricted=restricted_mode)
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 File "/var/lib/juju/agents/unit-vault-0/.venv/lib/python3.8/site-packages/charms/reactive/bus.py", line 390, in dispatch
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 _invoke(other_handlers)
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 File "/var/lib/juju/agents/unit-vault-0/.venv/lib/python3.8/site-packages/charms/reactive/bus.py", line 359, in _invoke
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 handler.invoke()
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 File "/var/lib/juju/agents/unit-vault-0/.venv/lib/python3.8/site-packages/charms/reactive/bus.py", line 181, in invoke
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 self._action(*args)
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 File "/var/lib/juju/agents/unit-vault-0/charm/reactive/vault_handlers.py", line 1054, in sync_cert_from_cache
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 ca_chain = vault_pki.get_chain()
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 File "/var/lib/juju/agents/unit-vault-0/charm/lib/charm/vault_pki.py", line 85, in get_chain
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 return client.read('{}/cert/ca_chain'.format(name))['data']['certificate']
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 File "/var/lib/juju/agents/unit-vault-0/.venv/lib/python3.8/site-packages/hvac/v1/__init__.py", line 157, in read
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 return self._adapter.get('/v1/{0}'.format(path), wrap_ttl=wrap_ttl).json()
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 File "/var/lib/juju/agents/unit-vault-0/.venv/lib/python3.8/site-packages/hvac/adapters.py", line 90, in get
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 return self.request('get', url, **kwargs)
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 File "/var/lib/juju/agents/unit-vault-0/.venv/lib/python3.8/site-packages/hvac/adapters.py", line 233, in request
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 utils.raise_for_error(response.status_code, text, errors=errors)
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 File "/var/lib/juju/agents/unit-vault-0/.venv/lib/python3.8/site-packages/hvac/utils.py", line 29, in raise_for_error
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 raise exceptions.InvalidRequest(message, errors=errors)
2024-04-18 18:24:52 WARNING unit.vault/0.leader-settings-changed logger.go:60 hvac.exceptions.InvalidRequest: backend must be configured with a CA certificate/key
2024-04-18 18:24:52 DEBUG juju.worker.uniter.remotestate watcher.go:701 got leader settings change for vault/0: ok=true
2024-04-18 18:24:52 ERROR juju.worker.uniter.operation runhook.go:180 hook "leader-settings-changed" (via explicit, bespoke hook script) failed: exit status 1
2024-04-18 18:24:52 DEBUG juju.machinelock machinelock.go:206 created rotating log file "/var/log/juju/machine-lock.log" with max size 10 MB and max backups 5
2024-04-18 18:24:52 DEBUG juju.machinelock machinelock.go:190 machine lock "machine-lock" released for vault/0 uniter (run leader-settings-changed hook)
2024-04-18 18:24:52 DEBUG juju.worker.uniter.operation executor.go:118 lock released for vault/0
2024-04-18 18:24:52 INFO juju.worker.uniter resolver.go:161 awaiting error resolution for "leader-settings-changed" hook