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Add a README.md file for cluster federation.

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Madhusudan.C.S 2016-07-23 17:28:56 -07:00
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# Cluster Federation
Kubernetes Cluster Federation enables users to federate multiple
Kubernetes clusters. Please see the [user guide](http://kubernetes.io/docs/admin/federation/)
and the [admin guide](http://kubernetes.io/docs/user-guide/federation/federated-services/)
for more details about setting up and using the Cluster Federation.
# Building Kubernetes Cluster Federation
Please see the [Kubernetes Development Guide](https://github.com/kubernetes/kubernetes/blob/master/docs/devel/development.md)
for initial setup. Once you have the development environment setup
as explained in that guide, you also need to install [`jq`](https://stedolan.github.io/jq/download/)
Building cluster federation should be as simple as running:
```shell
make build do=gen
```
To deploy clusters and install federation components, edit the
`config.default.json` file to describe your clusters and run
```shell
make build do=deploy
```
To turn down the federation components and tear down the clusters run:
```shell
make build do=destroy
```
# Ideas for improvement
1. Split the `build` phase (make recipe) into multiple phases:
1. `init`: pull installer images
2. `build-binaries`
3. `build-docker`
4. `build`: build-binary + build-docker
5. `push`: to push the built images
6. `genconfig`
7. `deploy-clusters`
8. `deploy-federation`
9. `deploy`: deploy-clusters + deploy-federation
10. `destroy-federation`
11. `destroy-clusters`
12. `destroy`: destroy-federation + destroy-clusters
13. `redeploy-federation`: just redeploys the federation components.
2. Add a `release` phase to run as part of Kubernetes release process
that copies only a part of the `build.sh` script that's relevant to
the users into the release.
3. Continue with `destroy` phase even in the face of errors.
The bash script sets `set -e errexit` which causes the script to exit
at the very first error. This should be the default mode for deploying
components but not for destroying/cleanup.