Comment 62 for bug 1665698

Ubuntu SRU Information

[Impact]
OpenStack deployments using vif types `tap`, `ivs`, `iovisor`, `midonet`, and `vrouter` are unable to boot instances using libvirt 1.3.1 from Ubuntu 16.04 (as used by the Newton Ubuntu Cloud Archive). Note that this impacts the nova package which is currently in yakkety-proposed/newton-proposed - the version in *-updates does not have this issue.

[Test case]
Using an OpenStack cloud deployed with one of the above SDN's boot an instance.
The instance will fail to boot with a libvirt error.
Note cloud must be deployed using the -proposed packages from the Newton UCA.

[Regression Potential]
Minimal - the patch restores the previous behaviour for older libvirt versions, ensuring compatibility with documented libvirt version baselines in OpenStack Nova.