OPA Gatekeeper
Policy Controller for Kubernetes.
Overview
OPA Gatekeeper is a customizable admission webhook for Kubernetes that enforces policies executed by the Open Policy Agent (OPA). It provides a Kubernetes-native way to manage and enforce policies, helping to ensure compliance and security.
✨ Key Features
- Kubernetes admission control (validating and mutating)
- Policy enforcement as code using Rego
- Audit functionality for existing resources
- Extensible policy library with ConstraintTemplates
- Native Kubernetes CRDs for policy management
🎯 Key Differentiators
- Leverages the power and flexibility of the OPA Rego language
- Strong community and backing from major cloud providers
- Separation of policy logic (ConstraintTemplates) and configuration (Constraints)
Unique Value: Provides a powerful and flexible way to enforce custom policies on Kubernetes clusters, enabling fine-grained control over resource configurations.
🎯 Use Cases (4)
✅ Best For
- Implementing policy-as-code for Kubernetes
- Securing multi-tenant Kubernetes clusters
💡 Check With Vendor
Verify these considerations match your specific requirements:
- Environments that are not Kubernetes-based.
- Teams not comfortable with writing policies in Rego.
🏆 Alternatives
While Kyverno is often seen as easier to use for simpler policies, Gatekeeper's use of Rego allows for more complex and powerful policy definitions.
💻 Platforms
✅ Offline Mode Available
🔌 Integrations
💰 Pricing
Free tier: OPA Gatekeeper is open source and free to use.
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