Cluster Federation

Kubernetes Cluster Federation enables users to federate multiple Kubernetes clusters. To know more details about the same please see the user guide.

Deploying Kubernetes Cluster Federation

The prescribed mechanism to deploy Kubernetes Cluster Federation is using kubefed. A complete guide for the same is available at setup cluster federation using kubefed.

Building Kubernetes Cluster Federation

Building cluster federation binaries, which include fcp (short for federation control plane) and kubefed should be as simple as running:

make

A kubernetes like release packages can also be built using:

make quick-release

The 'kubefed binary can be found in federation-client-*.tar.gz. The fcp binary, which self contains federation-apiserver and federation-controller-manager can be found in federation-server-*.tar.gz. federation-server-*.tar.gz includes fcp-*.tar, which is the fcp docker image in the tar format and can be consumed by the kubefed tool.

To run the docker image load the container on your build machine and push to your repository:

# Run from $GOPATH/src/k8s.io/kubernetes/federation
docker load -i  _output/release-images/amd64/fcp-amd64.tar

# Tag to your REGISTRY/REPO/IMAGENAME[:TAG]
docker docker tag gcr.io/google_containers/fcp-amd64:v1.9.0-alpha.2.60_430416309f9e58-dirty REGISTRY/REPO/IMAGENAME[:TAG] 

# push to your registry
docker push REGISTRY/REPO/IMAGENAME[:TAG]

then bring up the new control plane:

_output/dockerized/bin/linux/amd64/kubefed init myfed --host-cluster-context=HOST_CLUSTER_CONTEXT --image=REGISTRY/REPO/IMAGENAME[:TAG] --dns-provider="PROVIDER" --dns-zone-name="YOUR_ZONE" --dns-provider-config=/path/to/provider.conf

A note to the reader

Kubernetes federation code is in a state of flux. Since its incubation, it lived in core kubernetes repo. The same now is maturing into its own placeholder. The process of this movement is not yet complete. It already borrows a lot of code from its earlier parent, especially build infrastructure and utility scripts. This will be cleaned up and simplified. Subsequently we will also concentrate our efforts into cleaning issues and problems reported on existing features, with a focus of moving atleast a subset of all federation features towards GA. Please raise an issue, in case you find problems and we welcome developers to participate in this effort.