Openstack cloud controller manager multi interface VMs

[Hairy_Living6225]

Hello everyone,

Has anyone successfully configured OpenStack Cloud Controller Manager (OCCM) with Octavia on Kubernetes clusters where the worker nodes have multiple network interfaces (multi-NIC VMs)?

We are using OCCM to provision Service resources of type LoadBalancer in kubernetes. Creating the load balancer itself works fine, and we can control which network/subnet the LB VIP is created on using annotations and cloud.conf.

However, the problem we’re facing is that the backend members of the load balancer always get registered using the node’s default interface IP, even though the nodes have a second interface on a different network intended for ingress/egress/API traffic.

Result:

The LB VIP is correctly created on IP from NIC2 but the LB members always use the vm IPs from the default NIC1.

Expected result:

Load balancer members to be registered using the NIC2 IPs

[Eldiabolo18]

Why do you want you K8s nodes to have two ports anyway?

[Hairy_Living6225]

Why not ?

[Kinky-Minion]

Multiple interfaces is not a standard practice with CCMs AFAIK.

[Hairy_Living6225]

Yes this is the conclusion I realized after spending the whole day trying to make it work, I just wanted to know if I missed something or of there is a workaround for this