OPA Gatekeeper Policies Cheat Sheet

Policy enforcement with OPA Gatekeeper. Constraint templates, constraints, and audit.

Last Updated: December 24, 2025

OPA Basics

Open Policy Agent, Rego language

Key concept 1: opa basics
Comprehensive explanation and practical examples for implementing opa basics in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 2: opa basics
Comprehensive explanation and practical examples for implementing opa basics in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 3: opa basics
Comprehensive explanation and practical examples for implementing opa basics in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 4: opa basics
Comprehensive explanation and practical examples for implementing opa basics in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 5: opa basics
Comprehensive explanation and practical examples for implementing opa basics in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 6: opa basics
Comprehensive explanation and practical examples for implementing opa basics in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.

Gatekeeper Installation

Admission controller, CRDs

Key concept 1: gatekeeper installation
Comprehensive explanation and practical examples for implementing gatekeeper installation in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 2: gatekeeper installation
Comprehensive explanation and practical examples for implementing gatekeeper installation in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 3: gatekeeper installation
Comprehensive explanation and practical examples for implementing gatekeeper installation in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 4: gatekeeper installation
Comprehensive explanation and practical examples for implementing gatekeeper installation in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 5: gatekeeper installation
Comprehensive explanation and practical examples for implementing gatekeeper installation in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.

Constraint Templates

Define policies, Rego rules

Key concept 1: constraint templates
Comprehensive explanation and practical examples for implementing constraint templates in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 2: constraint templates
Comprehensive explanation and practical examples for implementing constraint templates in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 3: constraint templates
Comprehensive explanation and practical examples for implementing constraint templates in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 4: constraint templates
Comprehensive explanation and practical examples for implementing constraint templates in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 5: constraint templates
Comprehensive explanation and practical examples for implementing constraint templates in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 6: constraint templates
Comprehensive explanation and practical examples for implementing constraint templates in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.

Constraints

Enforce policies, scope, parameters

Key concept 1: constraints
Comprehensive explanation and practical examples for implementing constraints in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 2: constraints
Comprehensive explanation and practical examples for implementing constraints in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 3: constraints
Comprehensive explanation and practical examples for implementing constraints in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 4: constraints
Comprehensive explanation and practical examples for implementing constraints in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 5: constraints
Comprehensive explanation and practical examples for implementing constraints in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.

Audit

Compliance reporting, violations

Key concept 1: audit
Comprehensive explanation and practical examples for implementing audit in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 2: audit
Comprehensive explanation and practical examples for implementing audit in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 3: audit
Comprehensive explanation and practical examples for implementing audit in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 4: audit
Comprehensive explanation and practical examples for implementing audit in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 5: audit
Comprehensive explanation and practical examples for implementing audit in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 6: audit
Comprehensive explanation and practical examples for implementing audit in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.

Library

Policy library, examples, best practices

Key concept 1: library
Comprehensive explanation and practical examples for implementing library in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 2: library
Comprehensive explanation and practical examples for implementing library in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 3: library
Comprehensive explanation and practical examples for implementing library in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 4: library
Comprehensive explanation and practical examples for implementing library in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 5: library
Comprehensive explanation and practical examples for implementing library in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
💡 Pro Tip: Master the fundamentals of OPA Gatekeeper Policies first before diving into advanced features. Practice with real-world projects and refer to this comprehensive cheatsheet for quick reference and best practices.
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