Library › Book 8 › Policy as Code with OPA and Rego
Policy as Code with OPA and Rego
4.1🔒Why Policies Must Be CodeStatic analysis tools catch what terraform validate cannot: security misconfigurations, compliance violations, and organizational policy…
4.2🔒OPA/Rego: The Universal Policy EngineOpen Policy Agent (OPA) evaluates structured data against Rego policies. This is the most flexible approach because it works with any…
4.3🔒Advanced Rego PatternsRun tests: opa test policy/ -v
4.4🔒Checkov: Batteries IncludedCheckov ships with 1000+ built-in rules and requires zero configuration.
4.5🔒Combining Tools in a CI PipelineCommon Mistake: Using only one policy tool and assuming it catches everything. Different tools have different rule databases. Use at least…
4.6🔒Exercises: Chapter 41. [Beginner] Install Conftest and write a Rego policy that denies any Terraform resource without an "Environment" tag. Test it against a…
4.7🔒Q&ASelf-Assessment Quiz: Chapter 41. What is the difference between tfsec, Checkov, and OPA/Conftest? 2. In Rego, what does input.resource_changes[_] mean? 3. How do you…
4.8🔒Key Takeaways- Policies written in documentation get ignored; policies written in code get enforced - OPA/Rego is the most flexible policy engine -- it…
4.9🔒Career Translation- Authored 40+ OPA/Rego policies enforcing S3 encryption, IAM least-privilege, and cost controls across all Terraform deployments, with…
4.10🔒Q&AInterview Depth CheckPrompt: Your organization has a compliance requirement: all S3 buckets must have encryption, versioning, and private ACLs. How would you…