Folks,
I have deployed openstack using ML2/OVN on 1 controller and 2 compute nodes so far everything is working fine, when i configured router it by default used L3HA and i can see active-backup router on both compute nodes. currently my all SNAT traffic going out using compute-1
I don't want bottleneck in network so i am looking for DVR deployment and after reading i found tenant VLAN doesn't support DVR https://bugzilla.redhat.com/show_bug.cgi?id=1704596
After doing more research i found that if i set manually external_mac using the following command then my vm using local compute node to send traffic in/out just like DVR instead of centralized design.
root@os-infra-1-neutron-ovn-northd-container-24eea9c2:~# ovn-nbctl find NAT type=dnat_and_snat _uuid : 99bdd866-01ed-425d-853b-9362ae8572c9 external_ids : {"neutron:fip_external_mac"="fa:16:3e:2d:7e:fa", "neutron:fip_id"="025a912a-c0ee-4f36-98ad-8992bd825cfc", "neutron:fip_network_id"="9cccf39d-edba-4069-91ef-5f30afbb6604", "neutron:fip_port_id"="70ad361a-b42e-403b-a5c1-4ee39ddf5e31", "neutron:revision_number"="6", "neutron:router_name"=neutron-8af10b06-c8de-4166-9ab1-ca2f775b08a8} external_ip : "10.40.255.10" external_mac : [] logical_ip : "172.168.0.164" logical_port : "70ad361a-b42e-403b-a5c1-4ee39ddf5e31" options : {} type : dnat_and_snat
_uuid : c438e7be-5ff4-472e-b053-8d6ed74cd4dc external_ids : {"neutron:fip_external_mac"="fa:16:3e:f5:9f:f0", "neutron:fip_id"="31e8cb44-0acd-453b-a4e6-39f6ab3a6da4", "neutron:fip_network_id"="9cccf39d-edba-4069-91ef-5f30afbb6604", "neutron:fip_port_id"="44a677c5-86ff-4b6b-a046-54e79f79c4cd", "neutron:revision_number"="2", "neutron:router_name"=neutron-8af10b06-c8de-4166-9ab1-ca2f775b08a8} external_ip : "10.40.255.5" external_mac : [] logical_ip : "172.168.0.67" logical_port : "44a677c5-86ff-4b6b-a046-54e79f79c4cd" options : {} type : dnat_and_snat
This is how i set external mac from fip_external_mac"="fa:16:3e:2d:7e:fa" in above command.
ovn-nbctl set NAT 99bdd866-01ed-425d-853b-9362ae8572c9 external_mac="fa:16:3e:2d:7e:fa"
How do i make this behavior default for every single VM, i don't want to do this manually to set the external mac address of each FIP?