How do you implement Kubernetes disaster recovery and backup strategies?

Kubernetes disaster recovery requires comprehensive backup strategies for cluster state, persistent data, and application configurations to ensure business continuity.\n\nBackup Components:\n• etcd cluster state: Core Kubernetes data\n• Persistent volumes: Application data\n• Configuration files: Manifests and secrets\n• Container images: Application artifacts\n• Cluster configuration: Node and network setup\n\nBackup Tools:\n• Velero: Cluster and PV backup/restore\n• etcdctl: Direct etcd snapshots\n• Kasten K10: Enterprise backup solution\n• Cloud-native tools: AWS Backup, Azure Backup\n\nImplementation Strategy:\n1. Regular etcd snapshots\n2. PV backup scheduling\n3. Cross-region replication\n4. Automated testing of restores\n5. Documentation and runbooks\n\nExample etcd Backup:\nETCDCTL_API=3 etcdctl snapshot save backup.db \\n --endpoints=https://127.0.0.1:2379 \\n --cacert=/etc/ssl/etcd/ca.crt \\n --cert=/etc/ssl/etcd/server.crt \\n --key=/etc/ssl/etcd/server.key\n\nBest Practices:\n• Test restore procedures regularly\n• Implement RTO/RPO requirements\n• Use multiple backup locations\n• Automate backup verification\n• Maintain detailed recovery documentation