We’re seeing teams wire up new SaaS apps to core data via our API gateway faster than ever, but the governance gaps show up a quarter later. Has anyone had success using OPA policy bundles and a service catalog (e.g., Backstage) to make integration reviews self-serve — ideally getting onboarding from 6 weeks to about 10 days without sacrificing auditability?
We hit 12 days by gating Backstage templates with OPA conftest in CI: https://www.openpolicyagent.org. Edge cases still needed manual review.
Building on @jameson84, we made Backstage templates require ‘data_classification’ and ‘pii_types’, and OPA reads those from the catalog to gate scopes and attach decision logs for audit — cuts the form ping‑pong. Small caveat: add time‑boxed waiver tokens (e.g., 14 days, signed) that OPA honors so edge cases don’t jam the lane. Are you shipping OPA decision logs to a SIEM or just parking them in S3?
Agree with @jameson84 — the lever that moved the needle for us was pushing OPA to the gateway (Envoy ext_authz) and shipping “integration kits” as versioned bundles with 30–90 day TTL on scopes, so renewals are auto-reviewed instead of lingering. Backstage just writes the kit name into the catalog, and a small scorecard blocks “ready” until the kit passes in a sandbox with synthetic data. We also run bundle channels (beta/stable) to soak new rules for a week and avoid Friday fire drills, keeping bundles small to limit blast radius.
We hit about 10 days by gating credential issuance on a Backstage Tech Insights scorecard fed by OPA — signed, version‑pinned bundles only (Bundles | Open Policy Agent), so it feels like a preflight checklist, not a committee meeting. We also run a 24–48h “shadow” mode where policies log decisions without blocking and open PRs for anything risky — @jameson84 have you tried scorecards to flip approvals from manual to pass/fail?
We got to about 10 days by treating each integration’s access as a small manifest checked in with the service; CI runs conftest + OPA partial eval to generate a signed “approval artifact” (cosign/Rekor) that’s attached to the Backstage entity and precomputes the permissions… The gateway only issues tokens if that signature is present, and the artifact doubles as the audit trail — like TSA PreCheck for services. Have you tried partial eval yet (https://www.openpolicyagent.org/docs/latest/eval/#partial-evaluation), or is mapping your catalog fields to a Rego data schema the bigger lift?
Skip the giant review by moving data classification into the Backstage template: teams pick scopes and sensitivity, and the scaffolder emits a tiny policy.json the gateway enforces via OPA bundles. We shaved “6 weeks” to days only after adding a default‑deny sandbox phase: first 5 days tokens are read‑only and rate‑limited, auto‑promote once telemetry says policy hits are clean. Caveat: watch bundle bloat at the gateway — we had to split kits by data domain to keep Envoy warm.