# Migrating from Nginx Proxy Manager (NPM)

## Concept Mapping

| NPM Feature | Traefik Equivalent |
|-------------|-------------------|
| Proxy Hosts | Routers + Services |
| SSL Certificates | certresolver (automatic) |
| Custom Locations | Middlewares |
| Access Lists | Authelia / Basic Auth |
| 404 Page | Custom error middleware |
| Redirection Hosts | Redirect middleware |
| Streams | TCP Routers |

## Migration Steps

### 1. Document Current NPM Setup

In NPM UI, go through each Proxy Host and note:
- Domain names
- Forward hostname/IP and port
- Scheme (http/https)
- Custom locations
- Access lists
- SSL settings
- Advanced configuration

### 2. Export NPM Config (Optional Backup)

NPM → **Settings** → **Backup** → **Download**

This creates a JSON backup of all hosts.

### 3. Create docker-compose.override.yml

This is where your migrated hosts go:

```yaml
version: "3.8"

networks:
  services:
    external: true

services:
  # ========================================
  # MIGRATED FROM NPM
  # ========================================
  
  # Example: Migrating "nextcloud.lemonlink.eu"
  # NPM Settings:
  # - Domain: nextcloud.lemonlink.eu
  # - Forward: 192.168.1.100:9001
  # - Scheme: http
  # - Block Common Exploits: yes
  # - SSL: yes (LE)
  
  nextcloud-migration:
    image: alpine:latest
    container_name: npm-migration-nextcloud
    restart: "no"
    command: "echo 'Migrated from NPM'"
    networks:
      - services
    labels:
      # Enable Traefik
      - "traefik.enable=true"
      
      # Router (like Proxy Host)
      - "traefik.http.routers.nextcloud.rule=Host(`nextcloud.lemonlink.eu`)"
      - "traefik.http.routers.nextcloud.entrypoints=websecure"
      - "traefik.http.routers.nextcloud.tls.certresolver=letsencrypt"
      
      # Service (Forward to)
      - "traefik.http.services.nextcloud.loadbalancer.server.url=http://192.168.1.100:9001"
      
      # Middlewares (Access Lists, Security)
      - "traefik.http.routers.nextcloud.middlewares=security-headers@file,rate-limit@file"
  
  # Add more migrations here...
  # service2-migration:
  #   ...
```

### 4. Common NPM → Traefik Patterns

#### Pattern 1: Basic Proxy Host
```
NPM:
  Domain: app.lemonlink.eu
  Forward: 192.168.1.10:8080
  SSL: yes

Traefik:
  labels:
    - "traefik.enable=true"
    - "traefik.http.routers.app.rule=Host(`app.lemonlink.eu`)"
    - "traefik.http.routers.app.entrypoints=websecure"
    - "traefik.http.routers.app.tls.certresolver=letsencrypt"
    - "traefik.http.services.app.loadbalancer.server.url=http://192.168.1.10:8080"
    - "traefik.http.routers.app.middlewares=security-headers@file,rate-limit@file"
```

#### Pattern 2: Access List (Basic Auth)
```
NPM:
  Access List: Family
  Users: user1 / pass1, user2 / pass2

Traefik:
  # In docker-compose.override.yml middlewares section
  # Or use Authelia (recommended)
  
  # Option A: Basic Auth (simple)
  labels:
    - "traefik.http.routers.app.middlewares=app-basicauth"
    - "traefik.http.middlewares.app-basicauth.basicauth.users=user1:$$apr1$$..."
  
  # Option B: Authelia (SSO, recommended)
  labels:
    - "traefik.http.routers.app.middlewares=authelia@docker"
```

#### Pattern 3: Custom Location
```
NPM:
  Location: /api
  Forward: 192.168.1.10:8080/api

Traefik:
  # Use PathPrefix rule
  labels:
    - "traefik.http.routers.app-api.rule=Host(`app.lemonlink.eu`) && PathPrefix(`/api`)"
    - "traefik.http.routers.app-api.service=api-service"
    - "traefik.http.services.api-service.loadbalancer.server.url=http://192.168.1.10:8080"
```

#### Pattern 4: Custom Nginx Config
```
NPM Advanced:
  proxy_set_header X-Custom-Header value;
  client_max_body_size 10G;

Traefik:
  # Add to dynamic/middlewares.yml or inline
  labels:
    - "traefik.http.middlewares.custom-headers.headers.customRequestHeaders.X-Custom-Header=value"
    - "traefik.http.routers.app.middlewares=custom-headers"
  
  # For body size, use buffering:
  - "traefik.http.services.app.loadbalancer.responseforwarding.flushinterval=100ms"
```

### 5. Gradual Migration Strategy

Don't migrate everything at once:

**Week 1: Setup LemonSec**
- Deploy Traefik + Authelia + CrowdSec
- Test with one non-critical service
- Keep NPM running

**Week 2: Migrate Low-Risk Services**
- Move internal services first
- Test thoroughly
- Keep Nextcloud on NPM for now

**Week 3: Migrate Nextcloud**
- Schedule downtime
- Update TrueNAS Nextcloud config
- Test with family
- Keep NPM as backup

**Week 4: Decommission NPM**
- After 1 week stable
- Stop NPM container
- Remove port forwards to NPM
- Keep config backup

### 6. Parallel Running

You can run both during migration:

```
Internet
    ↓
Router (port 443)
    ↓
    ├─► NPM (port 444) ──► Some services
    └─► Traefik (port 443) ──► New services
```

Change router port forward to test:
- Port 443 → Traefik
- Port 444 → NPM (backup access)

### 7. Testing Checklist

For each migrated service:
- [ ] HTTP redirects to HTTPS
- [ ] SSL certificate valid
- [ ] Can login
- [ ] All pages load
- [ ] File uploads work
- [ ] Mobile apps connect
- [ ] No console errors

### 8. Rollback Plan

If something breaks:

```bash
# Stop Traefik
docker-compose -f docker-compose.yml -f docker-compose.override.yml down

# Restart NPM
docker start npm

# Revert router port forward to NPM
# Access via: https://old-domain:444 (if configured)
```

Keep NPM container stopped but available:
```bash
docker stop npm
docker rename npm npm-backup
# Don't delete until migration complete
```

## NPM Features Not in Traefik

| NPM Feature | Traefik Alternative |
|-------------|---------------------|
| Nice Web UI | Traefik Dashboard + Portainer |
| One-click SSL | Automatic via certresolver |
| Built-in auth | Authelia (more powerful) |
| Redirection UI | YAML config |
| Access Logs | JSON logs in traefik/logs/ |

## Benefits of Migrating

1. **Declarative**: All config in Git-trackable files
2. **Automatic**: SSL certificates without clicks
3. **Integrated**: Built-in CrowdSec, Authelia
4. **Fast**: Better performance than NPM
5. **Flexible**: More routing options
6. **Modern**: Active development, Traefik 3.x

## Need Help?

- Check `examples/` for common patterns
- See `docs/TRUENAS-NEXTCLOUD.md` for Nextcloud specifically
- Review `QUICKSTART.md` for fresh setup
- Traefik docs: https://doc.traefik.io/