A reliable system for managing ClickHouse backups and restores in Kubernetes using the altinity/clickhouse-backup tool is presented. Essential requirements include a Kubernetes cluster, access to GCS, and appropriate configurations. The backup system relies on services stored in Kubernetes as Secrets. The altinity/clickhouse-backup runs as a sidecar in ClickHouse pods, handling backup tasks and providing a REST API. The setup process includes creating a service account in GCS and updating the StatefulSet configuration within Kubernetes.
After wrestling with incomplete docs, scattered GitHub issues, and lots of trial and error, a reliable, production-grade approach for managing ClickHouse backups and restores in Kubernetes was established using the altinity/clickhouse-backup tool.
This guide distills that journey into a clear, reproducible workflow, aiming to enhance the backup strategy and simplify the restore process in Kubernetes.
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