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CapaKraken/docs/cicd-target-architecture.md
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# CI/CD Target Architecture
## Goal
This document describes the canonical release path for CapaKraken.
The release model is now:
1. PRs are validated by CI before merge.
2. Every push to `main` publishes immutable `app` and `migrator` images.
3. Staging and production promote the exact same `sha-<commit>` tag.
4. The host deploys only from images and runtime env files.
5. A deployment is successful only after `GET /api/ready` passes.
## Canonical Flow
### 1. Pull Request Validation
The main [ci.yml](/home/hartmut/Documents/Copilot/capakraken/.github/workflows/ci.yml) workflow remains the merge gate for:
- architecture guardrails
- typecheck
- lint
- unit tests
- build
- E2E
### 2. Automatic Image Release
[release-image.yml](/home/hartmut/Documents/Copilot/capakraken/.github/workflows/release-image.yml) now runs automatically on every push to `main` and can still be started manually for rebuilds or tag overrides.
It publishes two images from [Dockerfile.prod](/home/hartmut/Documents/Copilot/capakraken/Dockerfile.prod):
- `ghcr.io/<owner>/<repo>-app:sha-<commit>`
- `ghcr.io/<owner>/<repo>-migrator:sha-<commit>`
### 3. Staging Promotion
[deploy-staging.yml](/home/hartmut/Documents/Copilot/capakraken/.github/workflows/deploy-staging.yml) copies the canonical deploy bundle to the staging host:
- [docker-compose.prod.yml](/home/hartmut/Documents/Copilot/capakraken/docker-compose.prod.yml)
- [tooling/deploy/deploy-compose.sh](/home/hartmut/Documents/Copilot/capakraken/tooling/deploy/deploy-compose.sh)
- the rest of [tooling/deploy](/home/hartmut/Documents/Copilot/capakraken/tooling/deploy/README.md)
GitHub Actions also writes a short-lived `deploy.env` containing `APP_IMAGE`, `MIGRATOR_IMAGE`, and the host port.
### 4. Host-Side Deployment
On the target host, [deploy-compose.sh](/home/hartmut/Documents/Copilot/capakraken/tooling/deploy/deploy-compose.sh):
1. loads `.env.production` and `deploy.env`
2. validates the rendered compose file
3. pulls the immutable `app` and `migrator` images
4. starts PostgreSQL and Redis
5. runs Prisma migrations through the dedicated `migrator` image
6. starts the new `app` container
7. waits for `GET /api/ready`
The host does not build application code from Git anymore.
### 5. Production Promotion
[deploy-prod.yml](/home/hartmut/Documents/Copilot/capakraken/.github/workflows/deploy-prod.yml) repeats the exact staging flow with the same image tag after staging acceptance.
That keeps staging and production on the same artifact instead of rebuilding.
## Required Infrastructure
### Minimum
- GitHub repository with Actions enabled
- GHCR or another container registry
- one Linux host with Docker Engine and Docker Compose v2
- PostgreSQL
- Redis
- SSH access from GitHub Actions to the host
- reverse proxy or load balancer in front of the app
### Recommended
- separate staging and production hosts
- GitHub Environments for `staging` and `production`
- required approval for the `production` environment
- monitoring on `/api/health` and `/api/ready`
- PostgreSQL backup and restore drills
## Runtime Configuration
The canonical host-side inputs are:
- [docker-compose.prod.yml](/home/hartmut/Documents/Copilot/capakraken/docker-compose.prod.yml)
- `.env.production`
- `deploy.env`
`.env.production` holds long-lived runtime configuration and secrets. The example file is [tooling/deploy/.env.production.example](/home/hartmut/Documents/Copilot/capakraken/tooling/deploy/.env.production.example).
`deploy.env` is short-lived deployment metadata. The example file is [tooling/deploy/deploy.env.example](/home/hartmut/Documents/Copilot/capakraken/tooling/deploy/deploy.env.example).
Important invariants:
- `RATE_LIMIT_BACKEND=redis` should stay explicit in release environments
- runtime AI, SMTP, and anonymization secrets belong to the host or platform secret layer
- admin settings are for verification and legacy-secret cleanup, not for secret rotation
## Database Policy
Release environments must run migrations through the `migrator` image, which executes:
```bash
pnpm --filter @capakraken/db db:migrate:deploy
```
`db:push` remains a local-development tool, not a production rollout mechanism.
## Rollback Model
Rollback is image-based:
1. choose the previous healthy `sha-<commit>` tag
2. redeploy staging or production with that tag
3. confirm `GET /api/ready`
This assumes schema changes follow backwards-compatible expand-and-contract rollout rules.
## Production Update Summary
The standard production update is:
1. merge to `main` after CI is green
2. let [release-image.yml](/home/hartmut/Documents/Copilot/capakraken/.github/workflows/release-image.yml) publish `sha-<commit>` images
3. deploy that tag to staging through [deploy-staging.yml](/home/hartmut/Documents/Copilot/capakraken/.github/workflows/deploy-staging.yml)
4. validate staging
5. promote the same tag through [deploy-prod.yml](/home/hartmut/Documents/Copilot/capakraken/.github/workflows/deploy-prod.yml)
The important property is artifact identity: staging and production run the same image, not two separate builds.