openvswitch will delete vhost-user-client socket file if vhostuser_socket_dir=/var/run/openvswitch

[Lv Jiawei]

I used ocata version neutron and ovs-dpdk with vhost-user-client mode. When I restart ovs, I found the vhost-user-client socket file disappear and 'vhuc' interface link_state is down。
The vhostuser_socket_dir in /etc/neutron/plugins/ml2/openvswitch_agent.ini was set as default value: /var/run/openvswitch. And I found ovs would recreate this directory. As a result, the socket file would be deleted. So I think the default value of vhostuser_socket_dir is not appropriate.

[zhaobo (zhaobo6)]

For [1], this function had been merged in ocata. The ovs version and qemu version met the requirement if you want to use the vhost_user_client mode. Because this socket will be managed by qemu, it will still exist when the ovs crashes or restart.

Also I think a better approach is to use a separate directory for the vhost_user socket by configure the agent.conf

Please show/verify the configure of vm xml and ovs port.

[1] https://bugs.launchpad.net/neutron/+bug/1604924

[Launchpad Janitor (janitor)]

[Expired for neutron because there has been no activity for 60 days.]