findOvnMp0IP fails on OpenShift 4.20

[pellared]

Environment (OpenShift Local):

$ crc version
CRC version: 2.57.0+ae41f6
OpenShift version: 4.20.5
MicroShift version: 4.20.0

OBI fails in this line

opentelemetry-ebpf-instrumentation/pkg/kube/kubecache/meta/cni/ovn_kubernetes.go

Line 54 in 17b0cbe

return "", fmt.Errorf("cannot read annotation %s: %w", ovnSubnetAnnotation, err)

with

cannot read annotation k8s.ovn.org/node-subnets: json: cannot unmarshal array into Go value of type string

As far as I see that subnets structure can have different forms. We are not supporting dual-stack. See:

https://github.com/ovn-kubernetes/ovn-kubernetes/blob/5d56a53df520a085e629cdc71be092afed9c3f0f/go-controller/pkg/util/subnet_annotations.go#L15-L39

PS. I also found https://techdocs.broadcom.com/us/en/vmware-security-load-balancing/avi-load-balancer/avi-kubernetes-operator/1-13/avi-kubernetes-operator-guide-1-13/install-avi-kubernetes-operator/cni-support/ovn-kubernetes-cni-plugin-support-on-openshift.html

Side note:
Maybe it would be good to log the input that failed to parse?
Then it should be easier to fix the bug when even just the error message would be provided.

[pellared]

I can work on it, but no sooner than in January.

[pellared]

Can you assign me?