os-vif/releasenotes/notes/revert-always-plug-port-for...

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security:
- |
In 1.13.0 it was reported that bug #1734320 was partially resolved by
change Iaf15fa7a678ec2624f7c12f634269c465fbad930. It has since emerged
that that change introduced another bug due to an interaction with
libvirt. It was understood that libvirt would not recreate the ovs port
if it was present on the ovs bridge when spawning a vm however on
inspection of the libvirt code this is not the case. In this release
we have reverted the change to os-vif and libvirt will be the only
entity to create the ovs port when vif_type is set to ovs and
hybrid_plug is set to false in the neutron port binding details.
Bug #1734320 is not expected to be present if hybrid_plug=true or
vif_type vhost-user is used on linux. On windows if hybrid_plug is false
on bug #1734320 is also not expected to be present. A new mitigation to
bug #1734320 will be developed for the remaining case of
hybrid_plug=false on linux.