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docs/13_RELEASE_ENGINEERING_PLAYBOOK.md
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# 13 · Release Engineering Playbook — Stella Ops
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A concise, automation‑first guide describing **how source code on `main` becomes a verifiably signed, air‑gap‑friendly release**.
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It is opinionated for offline use‑cases and supply‑chain security (SLSA ≥ level 2 today, aiming for level 3).
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---
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## 0 Release Philosophy
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* **Fast but fearless** – every commit on `main` must be releasable; broken builds break the build, not the team.
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* **Reproducible** – anyone can rebuild byte‑identical artefacts with a single `make release` offline.
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* **Secure by default** – every artefact ships with a SBOM, Cosign signature and (future) Rekor log entry.
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* **Offline‑first** – all dependencies are vendored or mirrored into the internal registry; no Internet required at runtime.
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---
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## 1 Versioning & Branching
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| Branch | Purpose | Auto‑publish? |
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| ------------- | ------------------------------ | --------------------------------------- |
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| `main` | Always‑green development trunk | `nightly-*` images |
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| `release/X.Y` | Stabilise a minor line | `stella:X.Y-rcN` |
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| Tags | `X.Y.Z` = SemVer | `stella:X.Y.Z`, OUK tarball, Helm chart |
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* **SemVer** – MAJOR for breaking API/CLI changes, MINOR for features, PATCH for fixes.
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* Release tags are **signed** (`git tag -s`) with the Stella Ops GPG key (`0x90C4…`).
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---
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## 2 CI/CD Overview (GitLab CI + GitLab Runner)
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```mermaid
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graph LR
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A[push / MR] --> Lint
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Lint --> Unit
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Unit --> Build
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Build --> Test-Container
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Test-Container --> SBOM
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SBOM --> Sign
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Sign --> Publish
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Publish --> E2E
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Publish --> Notify
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```
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### Pipeline Stages
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| Stage | Key tasks |
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| ------------------ | ------------------------------------------------------------------------------------------------ |
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| **Lint** | ESLint, golangci‑lint, hadolint, markdown‑lint. |
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| **Unit** | `dotnet test`, `go test`, Jest UI tests. |
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| **Quota unit‑tests 🏷** | Validate QuotaService logic: reset at UTC, 5 s vs 60 s waits, header correctness. |
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| **Build** | Multi‑arch container build (`linux/amd64`, `linux/arm64`) using **BuildKit** + `--provenance` 📌. |
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| **Test‑Container** | Spin up compose file, run smoke APIs. |
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| **SBOM** 📌 | Invoke **StellaOps.SBOMBuilder** to generate SPDX JSON + attach `.sbom` label to image. |
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| **Sign** | Sign image with **Cosign** (`cosign sign --key cosign.key`). |
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| **Publish** | Push to `registry.git.stella-ops.ru`. |
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| **E2E** | Kind‑based Kubernetes test incl. Zastava DaemonSet; verify sub‑5 s scan SLA. |
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| **Notify** | Report to Mattermost & GitLab Slack app. |
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| **OfflineToken** | Call `JwtIssuer.Generate(exp=30d)` → store `client.jwt` artefact → attach to OUK build context |
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*All stages run in parallel where possible; max wall‑time < 15 min.*
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---
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## 3 Container Image Strategy
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| Image | Registry Tag | Contents |
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| ------------------------------ | --------------------------- | ---------------------------------------------------------------------- |
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| **backend** | `stella/backend:{ver}` | ASP.NET API, plugin loader. |
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| **ui** | `stella/ui:{ver}` | Pre‑built Angular SPA. |
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| **runner-trivy** | `stella/runner-trivy:{ver}` | Trivy CLI + SPDX/CycloneDX 🛠. |
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| **runner-grype** | `stella/runner-grype:{ver}` | Optional plug‑in scanner. |
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| **🏷️ StellaOps.Registry** 📌 | `stella/registry:{ver}` | Scratch image embedding Docker Registry v2 + Cosign policy controller. |
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| **🏷️ StellaOps.MutePolicies** 📌 | `stella/policies:{ver}` | Sidecar serving policy bundles. |
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| **🏷️ StellaOps.Attestor** 📌 | `stella/attestor:{ver}` | SLSA provenance & Rekor signer (future). |
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*Images are **`--label org.opencontainers.image.source=git.stella-ops.ru`** and include SBOMs generated at build time.*
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---
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## 4 📌 Offline Update Kit (OUK) Build & Distribution
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**Purpose** – deliver updated CVE feeds & Trivy DB to air‑gapped clusters.
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### 4.1 CLI Tool
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*Go binary `ouk` lives in `tools/ouk/`.*
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```sh
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ouk fetch \
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--nvd --osv \
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--trivy-db --date $(date -I) \
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--output ouk-$(date +%Y%m%d).tar.gz \
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--sign cosign.key
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```
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### 4.2 Pipeline Hook
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* Runs on **first Friday** each month (cron).
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* Generates tarball, signs it, uploads to **GitLab Release asset**.
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* SHA‑256 + signature published alongside.
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### 4.3 Activation Flow (runtime)
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1. Admin uploads `.tar.gz` via **UI → Settings → Offline Updates (OUK)**.
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2. Backend verifies Cosign signature & digest.
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3. Files extracted into `var/lib/stella/db`.
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4. Redis caches invalidated; Dashboard “Feed Age” ticks green.
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5. Audit event `ouk_update` stored.
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### 4.4 Token Detail
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client.jwt placed under /root/ inside the tarball.
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CI job fails if token expiry < 29 days (guard against stale caches).
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---
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## 5 Artifact Signing & Transparency
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| Artefact | Signer | Tool |
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| ------------ | --------------- | --------------------- |
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| Git tags | GPG (`0x90C4…`) | `git tag -s` |
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| Containers | Cosign key pair | `cosign sign` |
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| Helm Charts | prov file | `helm package --sign` |
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| OUK tarballs | Cosign | `cosign sign-blob` |
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**Rekor** integration is **TODO** – once the internal Rekor mirror is online (`StellaOpsAttestor`) a post‑publish job will submit transparency log entries.
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---
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## 6 Release Checklist
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1. CI pipeline green.
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2. Bump `VERSION` file.
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3. Tag `git tag -s X.Y.Z -m "Release X.Y.Z"` & push.
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4. GitLab CI auto‑publishes images & charts.
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5. Draft GitLab **Release Notes** using `tools/release-notes-gen`.
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6. Verify SBOM attachment with `stella sbom verify stella/backend:X.Y.Z`.
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7. Smoke‑test OUK tarball in offline lab.
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8. Announce in `#stella-release` Mattermost channel.
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---
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## 7 Hot‑fix Procedure
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* Branch from latest tag → `hotfix/X.Y.Z+1-hf1`.
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* Apply minimal patch, add regression test.
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* CI pipeline (with reduced stages) must pass.
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* Tag `X.Y.Z+1`.
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* Publish only container + Helm chart; OUK not rebuilt.
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* Cherry‑pick back to `main`.
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---
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## 8 Deprecation & End‑of‑Life Policy
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| Feature | Deprecation notice | Removal earliest |
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| ------------------------ | ------------------ | ---------------- |
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| Legacy CSV policy import | 2025‑10‑01 | 2026‑04‑01 |
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| Docker v1 Registry auth | 2025‑12‑01 | 2026‑06‑01 |
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| In‑image Trivy DB | 2025‑12‑15 | 2026‑03‑15 |
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*At least 6 months notice; removal requires major version bump.*
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---
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## 9 📌 Non‑Commercial Usage Rules (English canonical)
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1. **Free for internal security assessments** (company or personal).
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2. **SaaS resale / re‑hosting prohibited** without prior written consent (AGPL §13).
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3. If you distribute a fork with UI or backend modifications **you must**:
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* Publish the complete modified source code.
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* Retain the original Stella Ops attribution in UI footer and CLI `--version`.
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4. All third‑party dependencies remain under their respective licences (MIT, Apache‑2.0, ISC, BSD).
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5. Deployments in state‑regulated or classified environments must obey **ФЗ‑187** export rules.
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---
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## 10 Best Practices Snapshot 📌
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* **SBOM‑per‑image** → attach at build time; store as OCI artifact for supply‑chain introspection.
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* **Provenance flag** (`--provenance=true`) in BuildKit fulfils SLSA 2 requirement.
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* Use **multi‑arch, reproducible builds** (`SOURCE_DATE_EPOCH` pins timestamps).
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* All pipelines enforce **Signed‑off‑by (DCO)**; CI fails if trailer missing.
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* `cosign policy` ensures only images signed by the project key run in production.
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---
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## 11 Contributing to Release Engineering
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* Fork & create MR to `infra/release-*`.
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* All infra changes require green **`integration-e2e-offline`** job.
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* Discuss larger infra migrations in `#sig-release` Mattermost; decisions recorded in `ADR/` folder.
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---
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## 12 Change Log (high‑level)
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| Version | Date | Note |
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| ------- | ---------- | --------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| v2.1 | 2025‑07‑15 | Added OUK build/publish pipeline, internal registry image (`StellaOps.Registry`), non‑commercial usage rules extraction, SBOM stage, BuildKit provenance. |
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| v2.0 | 2025‑07‑12 | Initial open‑sourcing of Release Engineering guide. |
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| v1.1 | 2025‑07‑09 | Fixed inner fencing; added retention policy |
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| v1.0 | 2025‑07‑09 | Initial playbook |
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---
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*(End of Release Engineering Playbook v1.1)*
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