gator ☆
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Description:
CLI Utility for Open Policy Agent Gatekeeper
Type: Formula  |  Latest Version: 3.21.0@0  |  Tracked Since: Dec 25, 2025
Links: Homepage  |  @OpenPolicyAgent  |  formulae.brew.sh
Category: Developer tools
Tags: kubernetes opa gatekeeper policy devops security
Install: brew install gator
About:
Gator is a command-line interface utility designed for testing and validating Open Policy Agent (OPA) Gatekeeper constraints and ConstraintTemplates. It allows developers to evaluate Rego policies against sample Kubernetes object configurations locally before deploying them to a cluster. This enables faster iteration and catches policy violations early in the development lifecycle.
Key Features:
  • Test Gatekeeper constraints locally without a Kubernetes cluster
  • Validate Rego policies against sample Kubernetes manifests
  • Support for ConstraintTemplates and custom constraints
  • Fast feedback loop for policy development
Use Cases:
  • Unit testing OPA Gatekeeper policies during development
  • Validating policy changes before cluster deployment
  • CI/CD pipeline integration for policy compliance checks
Alternatives:
  • kubeval – Validates Kubernetes manifests against schemas, but lacks OPA/Gatekeeper policy evaluation
  • conftest – General policy testing tool using Rego, but not specifically designed for Gatekeeper constraints
Version History
Detected Version Rev Change Commit
Dec 25, 2025 5:36pm 3.21.0 0 VERSION_BUMP 9349e946
Jan 9, 2025 8:42pm 0 VERSION_BUMP a96c6d43
Jan 9, 2025 8:00pm 0 VERSION_BUMP 040a2822
Dec 16, 2024 10:57pm 0 VERSION_BUMP 47353f17
Dec 12, 2024 2:41am 0 VERSION_BUMP 9c6d2223
Dec 12, 2024 2:26am 0 VERSION_BUMP ed3c1457
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