The Kubernetes controller-runtime Project is a set of go libraries for building Controllers. It is leveraged by Kubebuilder and Operator SDK. Both are a great place to start for new projects. See Kubebuilder's Quick Start to see how it can be used.
The full documentation can be found at VERSIONING.md, but TL;DR:
go getis not recommended)
Learn how to engage with the Kubernetes community on the community page.
controller-runtime is a subproject of the kubebuilder project in sig apimachinery.
You can reach the maintainers of this project at:
Contributions are greatly appreciated. The maintainers actively manage the issues list, and try to highlight issues suitable for newcomers. The project follows the typical GitHub pull request model. See CONTRIBUTING.md for more details. Before starting any work, please either comment on an existing issue, or file a new one.
Participation in the Kubernetes community is governed by the Kubernetes Code of Conduct.