enabling kube-ovn does not work

[magicl]

I get this error:

Infer repository core for addon kube-ovn", "", "Warning: this is a potentially destructive operation. Please enable kube-ovn", "with:", "", " microk8s enable kube-ovn --force"

I believe it should be applied to each node before joining the network. Would also be nice if we could automatically set the replica count and also mark all microk8s_HA nodes as kube-ovn/role=master (see: https://microk8s.io/docs/addon-kube-ovn)