# Quickstart Deployment OCR Sprint Service

Panduan deployment OCR Sprint Service ke server production untuk pemrosesan dokumen surat sprint Polri.

## Prasyarat Server

### Spesifikasi Minimum
- **OS**: Linux (Ubuntu 20.04+ / Debian 11+ / RHEL 8+)
- **CPU**: 4 cores (8 cores recommended untuk throughput tinggi)
- **RAM**: 8 GB minimum (16 GB recommended)
- **Storage**: 50 GB free space
  - ~3 GB untuk model PaddleOCR
  - ~1.5 GB untuk dependencies Python
  - Sisanya untuk blob storage dokumen
- **Network**: Port 8000 terbuka untuk API access

### Software Requirements
- Docker 24.0+ dan Docker Compose v2
- Git
- (Opsional) Nginx/Caddy untuk reverse proxy + SSL

## Deployment dengan Docker Compose (Recommended)

### 1. Clone Repository

```bash
# Login ke server sebagai user non-root dengan sudo access
ssh user@your-server.com

# Clone repository
git clone https://github.com/Adriankf59/ocr-sprint-service.git
cd ocr-sprint-service
```

### 2. Konfigurasi Environment

```bash
# Copy template environment
cp .env.example .env

# Edit konfigurasi production
nano .env
```

**Konfigurasi penting untuk production:**

```bash
# ==== App ====
APP_ENV=prod
APP_LOG_LEVEL=INFO

# ==== Storage ====
STORAGE_LOCAL_DIR=/app/storage
BLOB_STORAGE_DIR=/app/storage/blobs
BLOB_MAX_UPLOAD_MB=25

# ==== OCR ====
OCR_LANG=latin
OCR_USE_GPU=false              # set true jika server punya GPU NVIDIA
OCR_MAX_IMAGE_SIDE=2200

# ==== Preprocessing ====
PREPROCESS_TARGET_DPI=300
PREPROCESS_DENOISE=true
PREPROCESS_DESKEW=true
PREPROCESS_DETECT_DOCUMENT=true
PREPROCESS_REMOVE_SHADOW=true

# ==== Table Extraction ====
TABLES_ENABLED=true

# ==== Async Pipeline ====
QUEUE_ENABLED=true
REDIS_URL=redis://redis:6379/0
CELERY_TASK_DEFAULT_QUEUE=ocr_sprint

# ==== Database ====
DATABASE_URL=postgresql+psycopg://ocr:ocr@postgres:5432/ocr_sprint
DATABASE_ECHO=false

# ==== Auth (WAJIB untuk production!) ====
API_KEYS=your-secret-key-1,your-secret-key-2
API_KEY_HEADER=X-API-Key
```

**Generate API keys yang aman:**

```bash
# Generate random API key
openssl rand -hex 32
```

### 3. Build dan Start Services

```bash
# Build Docker images
docker compose build

# Start semua services (API, Worker, Redis, Postgres)
docker compose up -d

# Cek logs untuk memastikan semua berjalan
docker compose logs -f api worker
```

**Services yang berjalan:**
- `api`: FastAPI server di port 8000
- `worker`: Celery worker untuk async processing
- `redis`: Message broker untuk job queue
- `postgres`: Database untuk job state

### 4. Verifikasi Deployment

```bash
# Health check
curl http://localhost:8000/api/v1/health

# Expected response:
# {"status":"ok","version":"0.1.0"}

# Test OCR endpoint (sync mode untuk testing)
curl -X POST http://localhost:8000/api/v1/documents?sync=true \
  -H "X-API-Key: your-secret-key-1" \
  -F "file=@samples/pdf/example.pdf" \
  | jq
```

### 5. Setup Reverse Proxy (Nginx)

**Install Nginx:**

```bash
sudo apt update
sudo apt install nginx certbot python3-certbot-nginx
```

**Konfigurasi Nginx (`/etc/nginx/sites-available/ocr-sprint`):**

```nginx
upstream ocr_api {
    server localhost:8000;
}

server {
    listen 80;
    server_name ocr.yourdomain.com;

    client_max_body_size 30M;  # Sesuaikan dengan BLOB_MAX_UPLOAD_MB

    location / {
        proxy_pass http://ocr_api;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        
        # Timeout untuk dokumen besar
        proxy_read_timeout 300s;
        proxy_connect_timeout 75s;
    }

    location /metrics {
        # Restrict metrics endpoint
        allow 10.0.0.0/8;  # Internal network only
        deny all;
        proxy_pass http://ocr_api;
    }
}
```

**Enable site dan setup SSL:**

```bash
# Enable site
sudo ln -s /etc/nginx/sites-available/ocr-sprint /etc/nginx/sites-enabled/
sudo nginx -t
sudo systemctl reload nginx

# Setup SSL dengan Let's Encrypt
sudo certbot --nginx -d ocr.yourdomain.com
```

## Deployment Manual (Tanpa Docker)

### 1. Install System Dependencies

```bash
# Ubuntu/Debian
sudo apt update
sudo apt install -y \
    python3.11 python3.11-venv python3-pip \
    libgl1 libglib2.0-0 libsm6 libxext6 libxrender1 \
    libgomp1 libmagic1 \
    redis-server postgresql-14

# Start services
sudo systemctl enable --now redis-server postgresql
```

### 2. Setup Database

```bash
# Create database dan user
sudo -u postgres psql << EOF
CREATE USER ocr WITH PASSWORD 'your-secure-password';
CREATE DATABASE ocr_sprint OWNER ocr;
GRANT ALL PRIVILEGES ON DATABASE ocr_sprint TO ocr;
EOF
```

### 3. Install Application

```bash
# Clone repository
git clone https://github.com/Adriankf59/ocr-sprint-service.git
cd ocr-sprint-service

# Create virtual environment
python3.11 -m venv .venv
source .venv/bin/activate

# Install dependencies
pip install --upgrade pip
pip install -e ".[ocr]"

# Copy dan edit .env
cp .env.example .env
nano .env
```

**Update DATABASE_URL di .env:**

```bash
DATABASE_URL=postgresql+psycopg://ocr:your-secure-password@localhost:5432/ocr_sprint
REDIS_URL=redis://localhost:6379/0
QUEUE_ENABLED=true
```

### 4. Run Database Migrations

```bash
alembic upgrade head
```

### 5. Setup Systemd Services

**API Service (`/etc/systemd/system/ocr-sprint-api.service`):**

```ini
[Unit]
Description=OCR Sprint API
After=network.target postgresql.service redis.service

[Service]
Type=simple
User=ocr
WorkingDirectory=/opt/ocr-sprint-service
Environment="PATH=/opt/ocr-sprint-service/.venv/bin"
ExecStart=/opt/ocr-sprint-service/.venv/bin/uvicorn ocr_sprint.main:app --host 0.0.0.0 --port 8000 --workers 4
Restart=always
RestartSec=10

[Install]
WantedBy=multi-user.target
```

**Worker Service (`/etc/systemd/system/ocr-sprint-worker.service`):**

```ini
[Unit]
Description=OCR Sprint Celery Worker
After=network.target postgresql.service redis.service

[Service]
Type=simple
User=ocr
WorkingDirectory=/opt/ocr-sprint-service
Environment="PATH=/opt/ocr-sprint-service/.venv/bin"
ExecStart=/opt/ocr-sprint-service/.venv/bin/celery -A ocr_sprint.worker.celery_app worker -l info --concurrency=2
Restart=always
RestartSec=10

[Install]
WantedBy=multi-user.target
```

**Enable dan start services:**

```bash
sudo systemctl daemon-reload
sudo systemctl enable --now ocr-sprint-api ocr-sprint-worker
sudo systemctl status ocr-sprint-api ocr-sprint-worker
```

## Monitoring dan Maintenance

### Monitoring Logs

```bash
# Docker deployment
docker compose logs -f api worker

# Manual deployment
sudo journalctl -u ocr-sprint-api -f
sudo journalctl -u ocr-sprint-worker -f
```

### Prometheus Metrics

Metrics tersedia di endpoint `/metrics`:

```bash
curl http://localhost:8000/metrics
```

**Key metrics:**
- `ocr_documents_total`: Total dokumen diproses
- `ocr_processing_duration_seconds`: Durasi processing
- `ocr_confidence_score`: Distribusi confidence score
- `celery_task_*`: Celery worker metrics

### Backup Database

```bash
# Docker deployment
docker compose exec postgres pg_dump -U ocr ocr_sprint > backup_$(date +%Y%m%d).sql

# Manual deployment
pg_dump -U ocr ocr_sprint > backup_$(date +%Y%m%d).sql
```

### Update Service

```bash
# Docker deployment
cd ocr-sprint-service
git pull
docker compose build
docker compose up -d

# Manual deployment
cd ocr-sprint-service
git pull
source .venv/bin/activate
pip install -e ".[ocr]"
alembic upgrade head
sudo systemctl restart ocr-sprint-api ocr-sprint-worker
```

## Troubleshooting

### Service tidak start

```bash
# Cek logs
docker compose logs api worker

# Cek health check
curl http://localhost:8000/api/v1/health
```

### PaddleOCR model download gagal

```bash
# Download manual ke volume
docker compose exec api python -c "from paddleocr import PaddleOCR; PaddleOCR(use_angle_cls=True, lang='latin')"
```

### Worker tidak memproses jobs

```bash
# Cek Redis connection
docker compose exec worker redis-cli -h redis ping

# Cek Celery worker status
docker compose exec worker celery -A ocr_sprint.worker.celery_app inspect active
```

### Database migration error

```bash
# Cek current revision
docker compose exec api alembic current

# Force upgrade
docker compose exec api alembic upgrade head
```

### Out of memory

```bash
# Kurangi worker concurrency di docker-compose.yml
# Ubah: --concurrency=1 (default) atau tambahkan memory limit
```

## Security Checklist

- [ ] API_KEYS diset dengan nilai random yang kuat
- [ ] Firewall configured (hanya port 80/443 terbuka)
- [ ] SSL/TLS enabled via Nginx + Let's Encrypt
- [ ] Database password diganti dari default
- [ ] `/metrics` endpoint restricted ke internal network
- [ ] Regular backup database dan blob storage
- [ ] Log rotation configured
- [ ] OS security updates enabled

## Performance Tuning

### Untuk throughput tinggi:

1. **Increase worker concurrency:**
   ```yaml
   # docker-compose.yml
   command: ["celery", "-A", "ocr_sprint.worker.celery_app", "worker", "-l", "info", "--concurrency=4"]
   ```

2. **Scale workers horizontally:**
   ```bash
   docker compose up -d --scale worker=3
   ```

3. **Enable GPU (jika tersedia):**
   ```bash
   # .env
   OCR_USE_GPU=true
   ```

4. **Tune Postgres:**
   ```sql
   -- Increase connection pool
   ALTER SYSTEM SET max_connections = 200;
   ALTER SYSTEM SET shared_buffers = '2GB';
   ```

## Support

Untuk pertanyaan atau issues, hubungi tim development atau buat issue di repository.
