Maintenance in Managed Service for Apache Kafka®

Maintenance means:

• Automatic installation of Apache Kafka® updates and revisions for hosts (including disabled clusters).
• Scheduled automatic increase of storage size.
• Other maintenance activities.

Maintenance includes changes within one Apache Kafka® major version. For information about migrating between major versions, see Apache Kafka® version upgrade.

Maintenance windowMaintenance window

You can set the preferred maintenance time when creating a cluster or updating its settings:

• The arbitrary option (default) allows performing maintenance at any time.
• The by schedule option allows setting the preferred maintenance start day and time (UTC). For example, you can choose a time when the cluster is least loaded.

Maintenance procedureMaintenance procedure

In single-host Managed Service for Apache Kafka® clusters, a single broker host undergoes maintenance. This means, if a cluster needs to be restarted during maintenance, it will become unavailable.

In multi-host clusters, broker hosts undergo maintenance one by one. The hosts are queued randomly. A broker host becomes unavailable while it is being restarted during maintenance.

Karapace availabilityKarapace availability

Karapace is unavailable during maintenance and automatically restarts after its completion. Meanwhile, all schema data is retained as it is stored in the __schema_registry service topic.

Learn more about managing data schemas.