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Build Kubernetes Operators in Java Without Hassle

Java Operator SDK is a production-ready framework that makes implementing Kubernetes Operators in Java easy.

It provides a controller runtime, support for testing operators, and related tooling. In addition to that implementing conversion hooks and dynamic admission controllers are supported as a separate project (and much more, see related projects section).

Under the hood it uses the excellent Fabric8 Kubernetes Client, which provides additional facilities, like generating CRD from source code (and vice versa).

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Java Operator SDK is a CNCF project as part of Operator Framework.

Documentation

Documentation can be found on the JOSDK WebSite.

Contact us

Join us on Discord or feel free to ask any question on Kubernetes Slack Operator Channel

Meet us every other Tuesday 15:00 CEST (from 29.10.2024) at our community meeting on Zoom (Password in the Discord channel, or just ask for it there!)

How to Contribute

See the contribution guide on the website.

What is Java Operator SDK

Java Operator SDK is a higher level framework and related tooling to support writing Kubernetes Operators in Java. It makes it easy to implement best practices and patterns for an Operator. Features include:

  • Optimal handling Kubernetes API events
  • Handling dependent resources, related events, and caching.
  • Automatic Retries
  • Smart event scheduling
  • Easy to use Error Handling
  • ... and everything that a batteries included framework needs

For all features and their usage see the related section on the website.

Related Projects

Projects using JOSDK

While we know of multiple projects using JOSDK in production, we don't want to presume these projects want to advertise that fact here. For this reason, we ask that if you'd like your project to be featured in this section, please open a PR, adding a link to and short description of your project, as shown below: