This is the Operator for Open Policy Agent’s (OPA) Gatekeeper, which helps package, deploy, and manage Kubernetes native applications by building automation into a controller that helps perform initial operations such as installation, but also administrative operations such as upgrades, downgrades, backups, etc.
Gatekeeper is the Kubernetes-native way to integrate OPA into Kubernetes. It uses the OPA Constraint Framework, built with Kubernetes Custom Resource Definitions (CRDs), to describe and enforce policies.