tempest.scenario.test_network_basic_ops.TestNetworkBasicOps fails on cirros 0.6.1

[Martin Kopec]

Recently we've merged the cirros version bump from 0.5.2 to 0.6.1:
https://review.opendev.org/c/openstack/devstack/+/859773

It turns out that they switched to dhcpcd for network setup since version 0.6.0
https://github.com/cirros-dev/cirros/blob/8d608dcb04ff8ee3af37710d2308c2a6d7e2d86e/ChangeLog#L20

Tempest uses udhcpc as the default dhcp client:
https://opendev.org/openstack/tempest/src/commit/1569290be06e61d63061ae35a997aff0ebad68f1/tempest/config.py#L1204

As a result the following test fails with cirros 0.6.1:

tempest.scenario.test_network_basic_ops.TestNetworkBasicOps

Traceback (most recent call last):
  File "/opt/stack/tempest/tempest/common/utils/__init__.py", line 70, in wrapper
    return f(*func_args, **func_kwargs)
  File "/opt/stack/tempest/tempest/scenario/test_network_basic_ops.py", line 635, in test_subnet_details
    ssh_client.renew_lease(fixed_ip=floating_ip['fixed_ip_address'],
  File "/opt/stack/tempest/tempest/common/utils/linux/remote_client.py", line 176, in renew_lease
    return getattr(self, '_renew_lease_' + dhcp_client)(fixed_ip=fixed_ip)
  File "/opt/stack/tempest/tempest/common/utils/linux/remote_client.py", line 146, in _renew_lease_udhcpc
    pid = self.exec_command('cat {path}{nic}.pid'.
  File "/opt/stack/tempest/tempest/lib/common/utils/linux/remote_client.py", line 31, in wrapper
    return function(self, *args, **kwargs)
  File "/opt/stack/tempest/tempest/lib/common/utils/linux/remote_client.py", line 115, in exec_command
    return self.ssh_client.exec_command(cmd)
  File "/opt/stack/tempest/tempest/lib/common/ssh.py", line 238, in exec_command
    raise exceptions.SSHExecCommandFailed(
tempest.lib.exceptions.SSHExecCommandFailed: Command 'set -eu -o pipefail; PATH=$PATH:/sbin:/usr/sbin; cat /var/run/udhcpc.eth0.pid', exit status: 1, stderr:
cat: can't open '/var/run/udhcpc.eth0.pid': No such file or directory

This affects all tempest-slow jobs where the test(s) is executed.

[Martin Kopec (mkopec)]

https://2ba7f10ac23ddac3b9f6-1e843e6e8b4b324e302975788622dfa4.ssl.cf2.rackcdn.com/874232/1/check/tempest-slow-py3/35d32f7/testr_results.html

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/tempest/+/874586

[Martin Kopec (mkopec)]

also tempest-full-py3 job is affected:
https://zuul.openstack.org/builds?job_name=tempest-full-parallel&project=openstack/tempest

[OpenStack Infra (hudson-openstack)]

Change abandoned by "Martin Kopec <email address hidden>" on branch: master
Review: https://review.opendev.org/c/openstack/tempest/+/874586
Reason: gonna be addressed in https://review.opendev.org/c/openstack/devstack/+/881504

[Martin Kopec (mkopec)]

at the end, we fixed this outside of tempest .. in devstack by https://review.opendev.org/c/openstack/devstack/+/881504