We are using secondary networking in some Kubernetes clusters via Multus. Unfortunately, when we attach additional Neutron ports to k8s worker VMs (or if bare metal nodes have additional NICs), the IP addresses for these are automatically added to the node's list of InternalIPs. As the secondary network is not universally available (for example it's not used by controller nodes), attaching these interfaces can break connectivity to pods' log output and the ability to run kubectl exec.

It would be helpful if --node-ip could be set for the kubelet at deploy time based on the IP it is allocated. I can't immediately think of a reason this would need to be restricted to this use case, so it may be possible to do so universally.