I believe the fix belongs to packaging / containers / tripleo and not neutron itself.
** Changed in: neutron Status: New => Invalid -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to neutron. https://bugs.launchpad.net/bugs/1748658 Title: Restarting Neutron containers which make use of network namespaces doesn't work Status in neutron: Invalid Status in tripleo: Fix Released Bug description: When DHCP, L3, Metadata or OVN-Metadata containers are restarted they can't set the previous namespaces: [heat-admin@overcloud-novacompute-0 neutron]$ sudo docker restart 8559f5a7fa45 8559f5a7fa45 [heat-admin@overcloud-novacompute-0 neutron]$ tail -f /var/log/containers/neutron/networking-ovn-metadata-agent.log 2018-02-09 08:34:41.059 5 CRITICAL neutron [-] Unhandled error: ProcessExecutionError: Exit code: 2; Stdin: ; Stdout: ; Stderr: RTNETLINK answers: Invalid argument 2018-02-09 08:34:41.059 5 ERROR neutron Traceback (most recent call last): 2018-02-09 08:34:41.059 5 ERROR neutron File "/usr/bin/networking-ovn-metadata-agent", line 10, in <module> 2018-02-09 08:34:41.059 5 ERROR neutron sys.exit(main()) 2018-02-09 08:34:41.059 5 ERROR neutron File "/usr/lib/python2.7/site-packages/networking_ovn/cmd/eventlet/agents/metadata.py", line 17, in main 2018-02-09 08:34:41.059 5 ERROR neutron metadata_agent.main() 2018-02-09 08:34:41.059 5 ERROR neutron File "/usr/lib/python2.7/site-packages/networking_ovn/agent/metadata_agent.py", line 38, in main 2018-02-09 08:34:41.059 5 ERROR neutron agt.start() 2018-02-09 08:34:41.059 5 ERROR neutron File "/usr/lib/python2.7/site-packages/networking_ovn/agent/metadata/agent.py", line 147, in start 2018-02-09 08:34:41.059 5 ERROR neutron self.sync() 2018-02-09 08:34:41.059 5 ERROR neutron File "/usr/lib/python2.7/site-packages/networking_ovn/agent/metadata/agent.py", line 56, in wrapped 2018-02-09 08:34:41.059 5 ERROR neutron return f(*args, **kwargs) 2018-02-09 08:34:41.059 5 ERROR neutron File "/usr/lib/python2.7/site-packages/networking_ovn/agent/metadata/agent.py", line 169, in sync 2018-02-09 08:34:41.059 5 ERROR neutron metadata_namespaces = self.ensure_all_networks_provisioned() 2018-02-09 08:34:41.059 5 ERROR neutron File "/usr/lib/python2.7/site-packages/networking_ovn/agent/metadata/agent.py", line 350, in ensure_all_networks_provisioned 2018-02-09 08:34:41.059 5 ERROR neutron netns = self.provision_datapath(datapath) 2018-02-09 08:34:41.059 5 ERROR neutron File "/usr/lib/python2.7/site-packages/networking_ovn/agent/metadata/agent.py", line 294, in provision_datapath 2018-02-09 08:34:41.059 5 ERROR neutron veth_name[0], veth_name[1], namespace) 2018-02-09 08:34:41.059 5 ERROR neutron File "/usr/lib/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 182, in add_veth 2018-02-09 08:34:41.059 5 ERROR neutron self._as_root([], 'link', tuple(args)) 2018-02-09 08:34:41.059 5 ERROR neutron File "/usr/lib/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 94, in _as_root 2018-02-09 08:34:41.059 5 ERROR neutron namespace=namespace) 2018-02-09 08:34:41.059 5 ERROR neutron File "/usr/lib/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 102, in _execute 2018-02-09 08:34:41.059 5 ERROR neutron log_fail_as_error=self.log_fail_as_error) 2018-02-09 08:34:41.059 5 ERROR neutron File "/usr/lib/python2.7/site-packages/neutron/agent/linux/utils.py", line 151, in execute 2018-02-09 08:34:41.059 5 ERROR neutron raise ProcessExecutionError(msg, returncode=returncode) 2018-02-09 08:34:41.059 5 ERROR neutron ProcessExecutionError: Exit code: 2; Stdin: ; Stdout: ; Stderr: RTNETLINK answers: Invalid argument 2018-02-09 08:34:41.059 5 ERROR neutron 2018-02-09 08:34:41.059 5 ERROR neutron 2018-02-09 08:34:41.177 21 INFO oslo_service.service [-] Parent process has died unexpectedly, exiting 2018-02-09 08:34:41.178 21 INFO eventlet.wsgi.server [-] (21) wsgi exited, is_accepting=True An easy way to reproduce the bug: [heat-admin@overcloud-novacompute-0 ~]$ sudo docker exec -u root -it 5c5f254a9321bd74b5911f46acb9513574c2cd9a3c59805a85cffd960bcc864d /bin/bash [root@overcloud-novacompute-0 /]# ip netns a my_netns [root@overcloud-novacompute-0 /]# exit [heat-admin@overcloud-novacompute-0 ~]$ sudo ip netns [heat-admin@overcloud-novacompute-0 ~]$ sudo docker restart 5c5f254a9321bd74b5911f46acb9513574c2cd9a3c59805a85cffd960bcc864d 5c5f254a9321bd74b5911f46acb9513574c2cd9a3c59805a85cffd960bcc864d [heat-admin@overcloud-novacompute-0 ~]$ sudo docker exec -u root -it 5c5f254a9321bd74b5911f46acb9513574c2cd9a3c59805a85cffd960bcc864d /bin/bash [root@overcloud-novacompute-0 /]# ip netns RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument my_netns [root@overcloud-novacompute-0 /]# ip netns e my_netns ip a RTNETLINK answers: Invalid argument setting the network namespace "my_netns" failed: Invalid argument Deleting everything under /run/netns/* from kolla_start but this would involve a full sync of the agents which is not desirable: [root@overcloud-novacompute-0 /]# rm /run/netns/my_netns rm: remove regular empty file '/run/netns/my_netns'? y [root@overcloud-novacompute-0 /]# ip netns [root@overcloud-novacompute-0 /]# ip netns a my_netns [root@overcloud-novacompute-0 /]# To manage notifications about this bug go to: https://bugs.launchpad.net/neutron/+bug/1748658/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : yahoo-eng-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp