Cloud SQL for MySQL supports blue-green deployments (Preview).

Cloud SQL for MySQL supports blue-green deployments (Preview).

Blue-green deployments let you update databases—such as performing major version upgrades from MySQL 8.0 to 8.4 and staging hardware or configuration modifications—while minimizing downtime. During a blue-green deployment, Cloud SQL creates a separate staging environment (green) that mirrors your existing production environment (blue) and maintains continuous logical replication from blue to green. You can test application compatibility and performance on the green environment without affecting production traffic, and then trigger a switchover to the green environment with minimal application downtime.

For more information, see About blue-green deployments in Cloud SQL.