<!-- Last reviewed: 2026-05-05 — reviewed at every milestone close -->

# Familienarchiv — Deployment Reference

> **If the app is down right now → jump to [§4 Logs](#4-logs--observability).**

This doc is the Day-1 checklist and operational reference. It links to the canonical infrastructure docs in `docs/infrastructure/` rather than duplicating them.

**Audience:** operator bringing up a fresh instance, or Successor-X debugging a live incident.

**Ownership:** project owner. Update this file in any PR that changes the container topology, env vars, or backup procedure.

## Table of Contents

1. [Deployment topology](#1-deployment-topology)
2. [Environment variables](#2-environment-variables)
3. [Bootstrap from scratch](#3-bootstrap-from-scratch)
4. [Logs + observability](#4-logs--observability)
5. [Backup + recovery](#5-backup--recovery)
6. [Common operational tasks](#6-common-operational-tasks)
7. [Known limitations](#7-known-limitations)

---

## 1. Deployment topology

```mermaid
graph TD
    Browser -->|HTTPS| Caddy["Caddy (TLS termination)"]
    Caddy -->|HTTP :5173| Frontend["Web Frontend\nSvelteKit / Node.js"]
    Caddy -->|HTTP :8080| Backend["API Backend\nSpring Boot / Jetty :8080"]
    Backend -->|JDBC :5432| DB[(PostgreSQL 16)]
    Backend -->|S3 API :9000| MinIO[(MinIO / Hetzner OBS)]
    Backend -->|HTTP :8000 internal| OCR["OCR Service\nPython FastAPI"]
    OCR -->|presigned URL| MinIO
    Browser -->|SSE direct| Backend
```

**Key facts:**
- Caddy terminates TLS and reverse-proxies to frontend and backend. See the Caddyfile in [`docs/infrastructure/production-compose.md`](infrastructure/production-compose.md).
- The OCR service has **no external port** — reachable only on the internal Docker network from the backend.
- SSE notifications go directly backend → browser (not via the SvelteKit SSR layer).
- Management port 8081 (Spring Actuator / Prometheus scrape) is internal only — the Caddy config blocks `/actuator/*` externally.

### OCR memory requirements

The OCR service requires significant RAM for model loading. The dev compose sets `mem_limit: 12g`.

| Production target | RAM | Recommended OCR limit | Notes |
|---|---|---|---|
| Hetzner CX42 | 16 GB | 12 GB | Recommended for OCR-enabled production |
| Hetzner CX32 | 8 GB | 6 GB | Accept reduced batch sizes and slower throughput |
| Hetzner CX22 | 4 GB | — | Disable the OCR service (`profiles: [ocr]`); run OCR on demand only |

A CX32 cannot honour a `mem_limit: 12g` — set it to `6g` in the prod overlay or use CX42.

### Dev vs production differences

| Concern | Dev compose | Prod overlay |
|---|---|---|
| MinIO image tag | `minio/minio:latest` (unpinned) | Pinned in prod overlay |
| Data persistence | Bind mounts `./data/postgres`, `./data/minio` | Named Docker volumes |
| Bucket creation | `create-buckets` helper container | Pre-created in Hetzner console |
| Spring profile | `dev,e2e` (enables OpenAPI + Swagger UI) | `prod` |
| Mail | Mailpit (local catcher) | Real SMTP |

Full prod overlay: [`docs/infrastructure/production-compose.md`](infrastructure/production-compose.md).

---

## 2. Environment variables

All vars are set in `.env` at the repo root (copy from `.env.example`). The backend resolves them via `application.yaml`; the Docker Compose file wires them into each container.

**Any var found in `docker-compose.yml` or `application*.yaml` that is not in this table is a blocking review comment on any PR that changes those files.**

### Backend

| Variable | Purpose | Default | Required? | Sensitive? |
|---|---|---|---|---|
| `SPRING_DATASOURCE_URL` | PostgreSQL JDBC URL | — | YES | — |
| `SPRING_DATASOURCE_USERNAME` | DB username | — | YES | — |
| `SPRING_DATASOURCE_PASSWORD` | DB password | — | YES | YES |
| `S3_ENDPOINT` | MinIO / OBS endpoint URL | — | YES | — |
| `S3_ACCESS_KEY` | MinIO access key (use service account, not root in prod) | — | YES | YES |
| `S3_SECRET_KEY` | MinIO secret key | — | YES | YES |
| `S3_BUCKET_NAME` | Target bucket name | — | YES | — |
| `S3_REGION` | S3 region string | `us-east-1` | YES | — |
| `APP_ADMIN_USERNAME` | Bootstrap admin username (⚠ not in .env.example) | `admin` | YES | — |
| `APP_ADMIN_PASSWORD` | Bootstrap admin password (⚠ ships as `admin123`) | `admin123` | YES | YES |
| `APP_BASE_URL` | Public-facing URL for email links | `http://localhost:3000` | YES (prod) | — |
| `APP_OCR_BASE_URL` | Internal URL of the OCR service | — | YES | — |
| `APP_OCR_TRAINING_TOKEN` | Secret token for OCR training endpoints | — | YES (prod) | YES |
| `MAIL_HOST` | SMTP host | `mailpit` (dev) | YES (prod) | — |
| `MAIL_PORT` | SMTP port | `1025` (dev) | YES (prod) | — |
| `MAIL_USERNAME` | SMTP username | — | YES (prod) | YES |
| `MAIL_PASSWORD` | SMTP password | — | YES (prod) | YES |
| `APP_MAIL_FROM` | From address for outbound mail | `noreply@familienarchiv.local` | YES (prod) | — |
| `MAIL_SMTP_AUTH` | SMTP auth enabled | `false` (dev) | YES (prod) | — |
| `MAIL_STARTTLS_ENABLE` | STARTTLS enabled | `false` (dev) | YES (prod) | — |
| `SPRING_PROFILES_ACTIVE` | Spring profile | `dev,e2e` (compose) | YES | — |

### PostgreSQL container

| Variable | Purpose | Default | Required? | Sensitive? |
|---|---|---|---|---|
| `POSTGRES_USER` | DB superuser | `archive_user` | YES | — |
| `POSTGRES_PASSWORD` | DB password | `change-me` | YES | YES |
| `POSTGRES_DB` | Database name | `family_archive_db` | YES | — |

### MinIO container

| Variable | Purpose | Default | Required? | Sensitive? |
|---|---|---|---|---|
| `MINIO_ROOT_USER` | MinIO root username | `minio_admin` | YES | — |
| `MINIO_ROOT_PASSWORD` | MinIO root password | `change-me` | YES | YES |
| `MINIO_DEFAULT_BUCKETS` | Bucket name | `archive-documents` | YES | — |

### OCR service

| Variable | Purpose | Default | Required? | Sensitive? |
|---|---|---|---|---|
| `TRAINING_TOKEN` | Guards `/train` and `/segtrain` endpoints (accepts file uploads) | — | YES (prod) | YES |
| `ALLOWED_PDF_HOSTS` | SSRF protection — comma-separated list of allowed PDF source hosts. **Do not widen to `*`** | `minio,localhost,127.0.0.1` | YES | — |
| `KRAKEN_MODEL_PATH` | Directory containing Kraken HTR models (populated by `download-kraken-models.sh`) | `/app/models/` | — | — |
| `BLLA_MODEL_PATH` | Kraken baseline layout analysis model path | `/app/models/blla.mlmodel` | — | — |

---

## 3. Bootstrap from scratch

> Full VPS provisioning steps are in [`docs/infrastructure/production-compose.md`](infrastructure/production-compose.md). This section covers the sequence and the security-critical steps.

### Security checklist — complete before first boot

> ⚠️ **These defaults ship in `.env.example` and `application.yaml`. Change them or you will have an insecure installation.**

- [ ] Set `APP_ADMIN_PASSWORD` (default: `admin123` — change before starting the backend)
- [ ] Set `APP_ADMIN_USERNAME` if you want a non-default admin login name (add to `.env` — not in `.env.example`)
- [ ] Rotate `POSTGRES_PASSWORD` from `change-me`
- [ ] Rotate `MINIO_ROOT_PASSWORD` from `change-me`
- [ ] Set a strong `APP_OCR_TRAINING_TOKEN` (backend) and the matching `TRAINING_TOKEN` (OCR service) — both must be the same value (`python3 -c "import secrets; print(secrets.token_hex(32))"`)
- [ ] Confirm `ALLOWED_PDF_HOSTS` is locked to your MinIO/S3 hostname — widening to `*` opens SSRF
- [ ] Set `SPRING_PROFILES_ACTIVE=prod` in the prod overlay (not `dev,e2e` — that exposes Swagger UI and `/v3/api-docs`)
- [ ] Use a dedicated MinIO service account for `S3_ACCESS_KEY` / `S3_SECRET_KEY`, not the root credentials

### Bootstrap sequence

```bash
# 1. Copy and fill the env file
cp .env.example .env
# edit .env — complete the security checklist above first

# 2. (Production only) Create the MinIO / Hetzner OBS bucket in the console
#    The dev compose has a create-buckets helper; production does not.
#    Create the bucket named $MINIO_DEFAULT_BUCKETS with private access.

# 3. Start the stack (prod overlay — see docs/infrastructure/production-compose.md)
#    docker-compose.prod.yml is NOT committed — create it from the guide above
docker compose -f docker-compose.yml -f docker-compose.prod.yml up -d

# 4. Flyway migrations run automatically on backend start.
#    Watch the backend log to confirm:
docker compose logs --follow --tail=100 backend

# 5. Verify the stack is healthy
curl http://localhost:8080/actuator/health
# Expected: {"status":"UP"}

# 6. Open the app and log in with the admin credentials from .env
```

> **Do not use `docker-compose.ci.yml` locally** — it disables bind mounts that the dev workflow depends on.

---

## 4. Logs + observability

### First-response commands

```bash
# Stream backend logs (most useful first)
docker compose logs --follow --tail=100 backend

# Stream all services
docker compose logs --follow

# Single snapshot
docker compose logs --tail=200 <service>
# services: frontend, backend, db, minio, ocr-service
```

### Log locations

- **Backend application log**: stdout (captured by Docker). Access inside the container at `/app/logs/` via `docker exec`.
- **Spring Actuator health**: `http://localhost:8080/actuator/health` (internal only in prod — port 8081 for Prometheus scraping)
- **Prometheus scraping**: management port 8081, path `/actuator/prometheus`. Internal only; Caddy blocks `/actuator/*` externally.

### Future observability

Phase 7 of the Production v1 milestone adds Prometheus + Loki + Grafana. No monitoring infrastructure is in place yet.

---

## 5. Backup + recovery

### Current state — no automated backup

No automated backup is configured. Manual procedure for a point-in-time backup:

```bash
# PostgreSQL dump
docker exec archive-db pg_dump -U ${POSTGRES_USER} ${POSTGRES_DB} > backup-$(date +%Y%m%d).sql

# MinIO data (bind-mounted in dev)
# Copy ./data/minio/ to external storage
```

Restoration:
```bash
# Restore Postgres
docker exec -i archive-db psql -U ${POSTGRES_USER} ${POSTGRES_DB} < backup-YYYYMMDD.sql
```

### Planned — phase 5 of Production v1 milestone

Automated backup (PostgreSQL WAL archiving + MinIO bucket replication) is planned in the Production v1 milestone phase 5. Until that ships: **manual backups are the only recovery option.**

---

## 6. Common operational tasks

### Reset dev database (truncates data, keeps schema)

```bash
bash scripts/reset-db.sh
```

> Truncates all data but does **not** drop the schema or re-run Flyway. Use for E2E test resets, not full reinstalls.
> ⚠️ Script hardcodes `DB_USER=archive_user` and `DB_NAME=family_archive_db` — if you customised these in `.env`, edit the script accordingly.

### Rebuild frontend container (clears node_modules volume)

```bash
bash scripts/rebuild-frontend.sh
```

> Assumes the Docker Compose volume is named `familienarchiv_frontend_node_modules`. If your project directory is not named `familienarchiv`, edit line 16 of the script.

### Download Kraken OCR models

```bash
bash scripts/download-kraken-models.sh
```

> Downloads the Kurrent/Sütterlin HTR models. Run once after a fresh clone or when models are updated.

### Trigger a mass import (Excel/ODS)

1. Place the import file in the `import/` bind mount on the backend container.
2. Call `POST /api/admin/trigger-import` (requires `ADMIN` permission).
3. The import runs asynchronously — poll `GET /api/admin/import-status` or watch backend logs.

---

## 7. Known limitations

| Limitation | Reason | Reference |
|---|---|---|
| **Single-node OCR service** | The two required OCR engines (Surya + Kraken) exist only in the Python ecosystem; horizontal scaling would require a job queue not currently implemented | [ADR-001](adr/001-ocr-python-microservice.md) |
| **No multi-tenancy** | Designed as a single-family private archive; all authenticated users share the same document space | Deliberate scope decision (family-only product frame) |
| **No multi-region** | Single PostgreSQL + MinIO instance; no replication or failover | Deliberate scope decision |
| **Max upload size** | 50 MB per file (500 MB per request for multi-file) | Configurable in `application.yaml` (`spring.servlet.multipart`) |
| **No automated backup** | Phase 5 of Production v1 milestone is not yet implemented | See §5 above |