Mastering Kubernetes - Second Edition

Federated Deployment

Federated deployments are a little smarter. When you create a federated deployment with X replicas and you have N clusters, the replicas will be distributed evenly between the clusters by default. If you have 3 clusters and the federated deployment has 15 pods, then each cluster will run 5 replicas. As with other federated resources, the control plane will store the federated deployment with 15 replicas and then create 3 deployments (1 for each cluster) with 5 replicas each. You can control the number of replicas per cluster by adding an annotation: federation.kubernetes.io/deployment-preferences. Federated deployment is still in Alpha as of Kubernetes 1.10. In the future, the annotation will become a proper field in ...