Use this image when walking through the federation-v2 userguide.
Example usage assuming $HOME/.kube/config has two contexts that are to be part of the federated cluster, cluster1 and cluster2:
docker run -v $HOME/.kube:/root/.kube erstaples/kubefed2:latest join cluster1 \
--cluster-context cluster1 \
--host-cluster-context cluster1 \
--add-to-registry \
--v=2
docker run -v $HOME/.kube:/root/.kube erstaples/kubefed2:latest join cluster2 \
--cluster-context cluster2 \
--host-cluster-context cluster1 \
--add-to-registry \
--v=2
See https://github.com/kubernetes-sigs/federation-v2/blob/master/docs/userguide.md for more information.
Happy federating!