System: LFS. Python-3.9.0, Neutron-17.0.0, oslo.privsep-2.4.0 Got Train+Py37, Usuri+Py38 working with the help of the install-guide. Victoria+Py39 Only eventlet needed a patch. Neutron only for neutron/plugins/ml2/drivers/linuxbridge/agent/arp_protect.py def ebtables(comm, table='nat'): execute = ip_lib.IPWrapper(NAMESPACE).netns.execute - return execute(['ebtables', '-t', table, '--concurrent'] + comm, + return execute(['/usr/sbin/ebtables', '-t', table, '--concurrent'] + comm, run_as_root=True) Possible not necessary but it avoids sudo errors. Controller logs (made readable): [-] Unable to enable dhcp for cb7948eb-e5c0-4764-a653-542c3e864f54.: TypeError: <lambda>() takes 6 positional arguments but 7 were given Traceback (most recent call last): File "/site-packages/neutron/agent/dhcp/agent.py", line 192, in call_driver rv = getattr(driver, action)(**action_kwargs) File "/site-packages/neutron/agent/linux/dhcp.py", line 249, in enable common_utils.wait_until_true(self._enable, timeout=300) File "/site-packages/neutron/common/utils.py", line 703, in wait_until_true while not predicate(): File "/site-packages/neutron/agent/linux/dhcp.py", line 261, in _enable interface_name = self.device_manager.setup(self.network) File "/site-packages/neutron/agent/linux/dhcp.py", line 1675, in setup if ip_lib.ensure_device_is_ready(interface_name, File "/site-packages/neutron/agent/linux/ip_lib.py", line 960, in ensure_device_is_ready if not dev.link.exists or not dev.link.address: File "/site-packages/neutron/agent/linux/ip_lib.py", line 513, in exists return privileged.interface_exists(self.name, self._parent.namespace) File "/site-packages/oslo_privsep/priv_context.py", line 247, in _wrap return self.channel.remote_call(name, args, kwargs) File "/site-packages/oslo_privsep/daemon.py", line 224, in remote_call raise exc_type(*result[2]) TypeError: <lambda>() takes 6 positional arguments but 7 were given Launching an instance: $ openstack server create --flavor m1.nano --image cirros \ --nic net-id=cb7948eb-e5c0-4764-a653-542c3e864f54 --security-group default \ --key-name mykey provider-instance results in status=BUILD and never ACTIVE Other logs on Controller after starting Compute1: Unable to access /var/lib/neutron/dhcp/cb7948eb-e5c0-4764-a653-542c3e864f54/pid; Error: [Errno 2] No such file or directory Ownerships and permissions are OK: drwxr-xr-x 2 neutron neutron 4096 Nov 15 19:49 cb7948eb-e5c0-4764-a653-542c3e864f54/ Anybody with the same problem? I am not a Python programmer so I am at a lost