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Welcome to the KurrentDB Kubernetes Operator guide. In this guide, we’ll refer to the KurrentDB Kubernetes Operator simply as “the Operator.” Use the Operator to simplify backup, scaling, and upgrades of KurrentDB clusters on Kubernetes.

Important

The Operator is an Enterprise-only feature, please contact us for more information.

Why run KurrentDB on Kubernetes?

Kubernetes is the modern enterprise standard for deploying containerized applications at scale. The Operator streamlines deployment and management of KurrentDB clusters.

Features

  • Deploy single-node or multi-node clusters
  • Back up and restore clusters
  • Perform rolling upgrades and update configurations

New in 1.3.0

  • Fix/improve support for resizing KurrentDB clusters, including explicitly handling data safety, minimizing downtime, and allowing the user to cancel a resize operation that is not progressing. See Updating Replica Count for details.
  • Support for custom labels and annotations on all child resources (StatefulSets, Pods, LoadBalancers, etc).
  • Allow users to use public certificate authorities like LetsEcrypt without having to manually pass the publicly trusted cert in a secret.
  • Allow manual overrides to the generated ConfigMap that is passed to KurrentDB. Previously, if a user manually altered the ConfigMap it would get immediately overwritten, whereas now it will "stick" until the next time the KurrentDB resource is updated.
  • Fix a bug affecting the KurrentDBBackup behavior when cluster's fqdnTemplate met certain criteria.
  • Fix and clarified the credentialsSecretName behavior in the helm chart. It is not normally required at all, but in previous versions, it was generating warning events with the default configuration.
  • Update helm chart to support the normal --skip-crds mechanism.

Supported KurrentDB Versions

The Operator supports running the following major versions of KurrentDB:

  • v25.x
  • v24.x
  • v23.x

Supported Hardware Architectures

The Operator is packaged for the following hardware architectures:

  • x86_64
  • arm64

Technical Support

For support questions, please contact us.

First Steps

Ready to install? Head over to the installation section.

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