Summary

In this chapter, we've covered the important topic of Kubernetes cluster federation. Cluster federation is still in the early stages, but it is already usable. There aren't a lot of deployments and the officially supported target platforms are currently AWS and GCE/GKE, but there is a lot of momentum behind cloud federation. It is a very important piece for building massively scalable systems on Kubernetes. We've discussed the motivation and use cases for Kubernetes cluster federation, the federation control plane components, and the federated Kubernetes objects. We also looked into the less supported aspects of federation such as custom scheduling, federated data access, and auto-scaling. We then looked at how to run multiple Kubernetes clusters, which includes setting up and Kubernetes cluster federation, adding and removing clusters to the federation along with load balancing, federated failover when something goes wrong, service discovery, and migration. Then, we dived into running...