Problem Statement
Describe your strategy to backup and restore persistent data in Kubernetes across cluster failure or migration.
Explanation
A robust backup and restore strategy involves using tools that snapshot PersistentVolumes or underlying storage, storing backups externally (cloud object store or off-cluster storage), verifying restore processes, and automating recovery drills. You must consider consistency (quiesce applications), retention, recovery time objective (RTO) and recovery point objective (RPO). For migration you may export data, set up new PVCs in the destination cluster, and restore volumes before pods start. This planning ensures data integrity and minimal downtime in production clusters.
