Comment 4 for bug 1996218

SolQA saw this on 2 juju 3.1.6 candidate runs over the weekend.

testrun 1: https://solutions.qa.canonical.com/testruns/1639761c-78bf-40fc-9941-c0d154fb0ff8
crashdump 1: https://oil-jenkins.canonical.com/artifacts/1639761c-78bf-40fc-9941-c0d154fb0ff8/generated/generated/openstack/juju-crashdump-openstack-2023-10-01-18.33.41.tar.gz
testrun 2: https://solutions.qa.canonical.com/testruns/ef1a6e6e-cf3e-40ce-a07e-46cad78300c7
crashdump 2: https://oil-jenkins.canonical.com/artifacts/ef1a6e6e-cf3e-40ce-a07e-46cad78300c7/generated/generated/openstack/juju-crashdump-openstack-2023-10-02-00.11.13.tar.gz

Error logs
2023-10-01 15:29:37 DEBUG unit.rabbitmq-server/2.juju-log server.go:325 Not updating clients: leader node is ready:False, client node is ready:False
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 Traceback (most recent call last):
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 File "/var/lib/juju/agents/unit-rabbitmq-server-2/charm/hooks/install.real", line 1243, in <module>
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 rabbit.assess_status(rabbit.ConfigRenderer(rabbit.CONFIG_FILES()))
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 File "/var/lib/juju/agents/unit-rabbitmq-server-2/charm/hooks/rabbit_utils.py", line 210, in __init__
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 ctxt.update(svc_context())
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 File "/var/lib/juju/agents/unit-rabbitmq-server-2/charm/hooks/rabbitmq_context.py", line 146, in __call__
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 ssl_mode, external_ca = ssl_utils.get_ssl_mode()
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 File "/var/lib/juju/agents/unit-rabbitmq-server-2/charm/hooks/ssl_utils.py", line 64, in get_ssl_mode
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 relation_certs = get_relation_cert_data()
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 File "/var/lib/juju/agents/unit-rabbitmq-server-2/charm/hooks/ssl_utils.py", line 59, in get_relation_cert_data
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 _, hostname = get_unit_amqp_endpoint_data()
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 File "/var/lib/juju/agents/unit-rabbitmq-server-2/charm/hooks/ssl_utils.py", line 47, in get_unit_amqp_endpoint_data
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 ip = get_relation_ip(
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 File "/var/lib/juju/agents/unit-rabbitmq-server-2/charm/charmhelpers/contrib/network/ip.py", line 571, in get_relation_ip
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 address = network_get_primary_address(interface)
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 File "/var/lib/juju/agents/unit-rabbitmq-server-2/charm/charmhelpers/core/hookenv.py", line 1180, in inner_translate_exc2
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 return f(*args, **kwargs)
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 File "/var/lib/juju/agents/unit-rabbitmq-server-2/charm/charmhelpers/core/hookenv.py", line 1374, in network_get_primary_address
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 response = subprocess.check_output(
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 File "/usr/lib/python3.10/subprocess.py", line 421, in check_output
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 File "/usr/lib/python3.10/subprocess.py", line 526, in run
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 raise CalledProcessError(retcode, process.args,
2023-10-01 15:29:37 WARNING unit.rabbitmq-server/2.install logger.go:60 subprocess.CalledProcessError: Command '['network-get', '--primary-address', 'amqp']' returned non-zero exit status 1.
2023-10-01 15:29:37 ERROR juju.worker.uniter.operation runhook.go:180 hook "install" (via explicit, bespoke hook script) failed: exit status 1