This patch introduces a new configuration for OVN CMS Options called
"enable-chassis-as-extport-host". This configuration can be used
by ML2/OVN to identify nodes that are eligible for scheduling OVN's
external ports.
Prior to this patch, external ports were always scheduled on centralized
networked nodes tagged with the "enable-chassis-as-gw" flag in the OVN
CMS Options but, when it comes to deploying OpenStack on OpenShift
requiring services such as the OVN Metadata Agent or DHCP Agent to
serve those external ports and running them on control plane nodes are
not ideal. This is where this patch comes handy allowing these ports to
have more flexibility in where they are scheduled.
The patch is also backward compatible and if the new configuration is
not present on the OVN CMS Options, ML2/OVN will continue to schedule
the external ports on nodes configured with the previous configuration
like always.
Documentation will be updated on a follow up patch.
Conflicts:
neutron/common/ovn/utils.py
neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/impl_idl_ovn.py
Note about this backport: This backport includes the
is_additional_chassis_supported() method from utils.py that was introduced
by another patch: https://review.opendev.org/c/openstack/neutron/+/895402
Closes-Bug: 2037294
Change-Id: Ic46d847e3aebfe543d5a7ab49d18d1f1abf1342e
Signed-off-by: Lucas Alvares Gomes <lucasagomes@gmail.com>
(cherry picked from commit 770914f98d)
e6d150ef7d