We contentedly announce the release of: os_vif 2.6.0: A library for plugging and unplugging virtual interfaces in OpenStack. This release is part of the xena release series. The source is available from: https://opendev.org/openstack/os_vif Download the package from: https://pypi.org/project/os_vif For more details, please see below. 2.6.0 ^^^^^ Bug Fixes * The os-vif OVS plugin now supports using per-port OVS bridges when hybrid plug is not used. This is disabled by default and can be enabled by defining "[os_vif_ovs]/per_port_bridge=True" in the compute service nova.conf. This capability should only be enabled if you are deploying with ml2/ovn and experience packet loss during live migrations. This is not supported on windows or when using ironic smartnic ports. This option was introduced to address bug: #1933517. When using OVN as a network backend OVN requires the OVS interface to both have an ofport-id and the neutron port uuid defined in the external_ids field. When the port is plugged if "[os_vif_ovs]/per_port_bridge" is not enabled then the OVS port will not be assigned an openflow port id until the tap device is created on the host. On loaded system with many flows and ports it can take a few second for OVN to detect the creation of the tap device and install the correct flows. During that interval packets can be dropped. When "[os_vif_ovs]/per_port_bridge" is enabled, os-vif will add the VM tap device to a new bridge that is connected to the integration bridge via a patch port. This enables OVN to install the openflow rules on the integration bridge before the tap is created reducing the possibility for packet loss during a live migration. By default per port bridges are disabled and this feature is considered experimental, however it will likely be enabled by default in the future after we gain experience with how this bridge topology scales in larger deployments. Changes in os_vif 2.5.0..2.6.0 ------------------------------ b837c1a add configurable per port bridges b75af3a update os-vif ci to account for devstack default changes Diffstat (except docs and test files) ------------------------------------- .zuul.yaml | 108 ++++++++++++------- .../notes/per-port-bridge-c6a50179a0256de3.yaml | 25 +++++ vif_plug_ovs/ovs.py | 120 +++++++++++++++++---- vif_plug_ovs/ovsdb/ovsdb_lib.py | 79 ++++++++++++-- 6 files changed, 374 insertions(+), 83 deletions(-)