hashring-controller

hashring-controller

This project is in early development and is not ready for production use.

A controller to manage Thanos Receive hashring configurations.

The goal of this project is to provide the ability to have close to real time updates to the hashring configuration in the Thanos receive replicas.

In order to achieve this, it works in two modes of operation:

1. The controller watches EndpointSlice resource via headless Service labels and sets the hashring configuration in a ConfigMap.
2. The controller, running in "sync" mode, sits as a sidecar in the Thanos Receive Pod and watches the ConfigMap for changes. When a change is detected, it will update the hashring configuration in the Thanos Receive replica.

Testing

Run tests with make test

Integration tests depend on the controller-runtime envtest package. You can install the binaries to run these tests via go install sigs.k8s.io/controller-runtime/tools/setup-envtest@latest After running setup-envtest use move the binaries to /usr/local/kubebuilder/bin/ or set the KUBEBUILDER_ASSETS environment variable to the location of the binaries.

Inspiration

This project is heavily inspired by the following two projects:

1. thanos-receive-controller project.
2. configmap-to-disk