OPA Gatekeeper

OPA Gatekeeper is an admission controller for Kubernetes that enforces policies defined by the Open Policy Agent (OPA) project. It allows cluster administrators to define and enforce custom policies for their Kubernetes clusters, ensuring that resources conform to organizational standards, security best practices, and regulatory requirements. Gatekeeper works by intercepting requests to the Kubernetes API server and evaluating them against a set of constraints and constraint templates written in Rego, OPA's policy language. This enables fine-grained control over resource creation, updates, and deletions. This tool is primarily for Kubernetes administrators, DevOps engineers, and security teams who need to implement robust governance and compliance within their Kubernetes environments. It helps prevent misconfigurations, enforce security policies, manage resource quotas, and ensure consistency across multiple clusters. By externalizing policy enforcement, Gatekeeper provides a flexible and scalable solution for managing complex policy requirements in cloud-native infrastructures.