How do you implement Kubernetes multi-cluster management and federation?

Multi-cluster management enables organizations to operate multiple Kubernetes clusters across regions, clouds, and environments with centralized control and policy enforcement.\n\nMulti-cluster Scenarios:\n• Geographic distribution for latency\n• Environment separation (dev/staging/prod)\n• Cloud provider diversity\n• Compliance and data sovereignty\n• Disaster recovery and high availability\n\nManagement Tools:\n• Cluster API: Declarative cluster lifecycle\n• Admiral: Multi-cluster service mesh\n• Submariner: Cross-cluster networking\n• Liqo: Dynamic cluster peering\n• Rancher: Centralized cluster management\n\nFederation Approaches:\n• Service mesh federation (Istio multi-cluster)\n• DNS-based service discovery\n• Cross-cluster networking (Submariner)\n• Workload distribution (Admiral)\n\nExample Cluster API:\napiVersion: cluster.x-k8s.io/v1beta1\nkind: Cluster\nmetadata:\n name: production-cluster\nspec:\n clusterNetwork:\n pods:\n cidrBlocks: [10.192.0.0/12]\n infrastructureRef:\n apiVersion: infrastructure.cluster.x-k8s.io/v1beta1\n kind: AWSCluster\n\nBest Practices:\n• Implement consistent security policies\n• Use GitOps for cluster configuration\n• Monitor cross-cluster communication\n• Plan for network connectivity\n• Automate cluster provisioning