CNMSQL is a Kubernetes operator for MySQL, built around the design patterns CloudNativePG established for Postgres. You declare a cluster as a custom resource and the operator handles the rest: provisioning, replication, failover and backups, instead of stitching those together by hand.

Features

• Declarative clusters: pods, persistent volumes, credentials and TLS provisioned from one resource
• GTID-based replication with automatic failover and planned switchover
• MySQL Group Replication with quorum consensus
• Physical backups with XtraBackup to S3-compatible storage
• Point-in-time recovery via continuous binlog archiving
• Role-aware services routing read-write, read-only and read-any traffic
• Multi-tenancy through cluster-per-tenant or schema-per-tenant
• Rolling upgrades with minimal downtime

Technologies Used

• Go and the Kubernetes controller-runtime, with CRDs for the API surface
• Percona Server for MySQL (8.0, 8.4, 9.x) and MariaDB (10.11, 11.4, 12.3)
• Percona XtraBackup and S3-compatible object storage
• mTLS between instances, Prometheus metrics for observability

It is an independent project, with no affiliation to Oracle, MySQL, the CNCF or CloudNativePG.