You have been subscribed to a public bug: There is a race when both neutron-ovs-cleanup and nova-compute trying to do operations on the qvb*** and qvo*** devices. Below is a scenario I recently met,
1. nova-compute was started and creating the veth_pair for VM instances running on the host - https://github.com/openstack/nova/blob/stable/icehouse/nova/network/linux_net.py#L1298 2. neutron-ovs-cleanup was kicked off and deleted all the ports. 3. when nova-compute tried to set the MTU at https://github.com/openstack/nova/blob/stable/icehouse/nova/network/linux_net.py#L1280 , Stderr: u'Cannot find device "qvo***"\n' was reported. Because the device that was just created was deleted again by neutron-ovs-cleanup. As they both operate on the same resources, there needs a way to synchronize the operations the two processes do on those resources. ** Affects: nova (Ubuntu) Importance: Undecided Status: Confirmed ** Tags: cts -- race between neutron-ovs-cleanup and nova-compute https://bugs.launchpad.net/bugs/1420572 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
