Open Policy Agent Intro
summary
Open Policy Agent (OPA) presents a general-purpose policy engine with a declarative Rego language, in-memory evaluation, and >100 GitHub contributors, 3,000+ Slack members and 4,500+ stars. Features include management APIs for bundle status and decision logging, local sidecar or library deployment, WASM/compiled-policy work, and conf test for config validation. Gatekeeper adds a Kubernetes constraint framework with alpha mutation (sidecar injection, defaults, metadata), audit, dry-run and warning enforcement that admits resources while emitting warnings.
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