Kyverno: Enhancing Kubernetes Policy Management with CEL and Upcoming MutatingAdmissionPolicies Support
Kyverno is a policy engine designed for Kubernetes clusters. It helps ensure that the configurations and operations within a Kubernetes environment adhere to specified rules and standards.
Key Features of Kyverno:
1. Validation: Kyverno checks Kubernetes resources to ensure they meet predefined policies, preventing misconfigurations.
2. Mutation: It can automatically adjust resource configurations to align with organizational standards, promoting consistency.
3. Generation: Kyverno can create and manage necessary configurations, reducing manual setup efforts.
4. Cleanup: It helps in removing outdated or unnecessary resources, keeping the cluster environment clean.
Integration of CEL in Kyverno Policies:
Kyverno utilizes the Common Expression Language (CEL) to write complex validation and mutation rules efficiently. This allows for more concise and powerful policy definitions within Kubernetes clusters.
Upcoming Support for MutatingAdmissionPolicies:
Kyverno is working to support Kubernetes' upcoming MutatingAdmissionPolicies (MAP). This will provide users with a declarative approach to define mutation logic using CEL, simplifying the mutation process and reducing the need for external admission controllers. The Kyverno CLI is being enhanced to apply and test these policies, similar to its current support for ValidatingAdmissionPolicies.
By embracing CEL and preparing for MutatingAdmissionPolicies, Kyverno continues to evolve, offering Kubernetes users more powerful and flexible tools to maintain cluster security and compliance.
For a practical demonstration of Kyverno's capabilities, you might want to take a look at these tutorial and kyverno docs: