Open Policy Agent Gatekeeper vs Terraform Test Framework
Open Policy Agent Gatekeeper
open-policy-agent.github.ioTerraform Test Framework
tf2project.ioSide by side
| Figure | Open Policy Agent Gatekeeper | Terraform Test Framework |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | Yes | — |
| Linux | Yes | Yes |
| API | Yes | — |
| Self-hosted | Yes | Yes |
| Plans published | 2 | 0 |
| Spec score · Infrastructure Policy as Code Tools | 8.2 (#9) | 6.6 (#20) |
| Installation | Installation supports prebuilt release images, development images, locally built images, and Helm-based deployment. | The maker documents installation with pip install tf2project and provides an official Docker image for CI/CD use. |
| Purpose | Gatekeeper is a validating and mutating Kubernetes webhook that enforces CRD-based policies evaluated by Open Policy Agent. | TF2 is a unified framework for testing Terraform code and Terraform-provisioned infrastructure. |
Plans
Open Policy Agent Gatekeeper
- GatekeeperFree
- Open-source GatekeeperFree
In their own words
Open Policy Agent Gatekeeper
Open Policy Agent Gatekeeper is a free, open-source Kubernetes policy controller for Linux and self-hosted deployments. It runs as a validating and mutating webhook, enforcing CRD-based policies evaluated by Open Policy Agent. Validation constraints can deny requests, warn, run in dry-run mode or report violations without changing resources. Mutation policies can alter matching resources during admission before validation checks the final object. An audit function periodically evaluates existing cluster resources against constraints to identify pre-existing misconfigurations. The project includes an extensible policy library with parameterized examples, and provider connections to external data such as image registries and directory services. Named integrations or backed services include Azure Policy for Kubernetes, Google Kubernetes Engine Policy Controller, Rancher, AWS EKS Blueprints and Alibaba Cloud. Installation options include prebuilt, development or locally built images and Helm. Gatekeeper requires Kubernetes resources introduced in version 1.16 and cluster-admin permissions for installation. The gator CLI is documented as beta from version 3.11.
Terraform Test Framework
Terraform Test Framework has no write-up on Specifiction yet; its figures are above.