Synology Docker Services

Production-ready Docker Compose templates for Synology NAS, featuring security best practices, resource management, and comprehensive health monitoring.

🚀 Quick Start

# 1. Clone the repository
git clone https://github.com/brianpooe/synology-docker-services.git
cd synology-docker-services

# 2. Copy and configure environment
cp .env.sample .env
nano .env  # Fill in your configuration

# 3. Generate Docker Compose files
./substitute_env.sh docker-compose-files/arr-stack_template.yaml docker-compose.arr-stack.yml
./substitute_env.sh docker-compose-files/postgres_template.yaml docker-compose.postgres.yml
./substitute_env.sh docker-compose-files/vault_template.yaml docker-compose.vault.yml

# 4. Deploy
docker-compose -f docker-compose.arr-stack.yml up -d
docker-compose -f docker-compose.postgres.yml up -d
docker-compose -f docker-compose.vault.yml up -d

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📦 Available Stacks

🎬 Media Stack (arr-stack_template.yaml)

Complete automated media management with VPN protection and socket-proxy security.

Services:

• Socket-Proxy - Secure Docker API gateway ✅ NEW
• Gluetun - VPN container (WireGuard/OpenVPN)
• qBittorrent - Torrent client (through VPN)
• SABnzbd - Usenet client (through VPN)
• Prowlarr - Indexer manager
• Radarr - Movie collection manager
• Sonarr - TV series collection manager
• Bazarr - Subtitle manager
• Emby - Media server
• Jellyseerr - Request management
• FlareSolverr - Captcha solver
• Recyclarr - Quality profile sync (TRaSH Guides)
• Diun - Docker image update notifications (via socket-proxy)

Features:

• ✅ VPN kill-switch for download clients
• ✅ Socket-proxy for secure Docker API access
• ✅ Health checks and dependency management
• ✅ Resource limits to prevent system exhaustion
• ✅ Security hardening (no-new-privileges, internal networks)

🗄️ Database Stack (postgres_template.yaml)

PostgreSQL with pgAdmin web interface.

Services:

• PostgreSQL 17 - Alpine-based database
• pgAdmin 4 - Web-based administration

Features:

• ✅ Health-aware dependency management
• ✅ Automated backups ready
• ✅ Resource limits configured
• ✅ Persistent data volumes

🔐 Secrets Stack (vault_template.yaml)

HashiCorp Vault for secrets management.

Services:

• Vault 1.19.2 - Secrets management

Features:

• ✅ Production-ready configuration
• ✅ Diun monitors but does not auto-update (safer)
• ✅ IPC_LOCK capability for security
• ✅ Health monitoring

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🔒 Security Features

Socket-Proxy Integration

All media stack services use socket-proxy for restricted Docker API access:

Feature	Traditional	With Socket-Proxy
Docker Socket Access	Full R/W	Restricted API endpoints
Exec in Containers	✅ Possible	❌ Blocked
Access Secrets	✅ Possible	❌ Blocked
Manage Volumes	✅ Possible	❌ Blocked
Attack Surface	100%	~10%

See: docs/SOCKET_PROXY.md for details

Additional Security

• No-new-privileges on all containers
• Read-only filesystems where applicable
• Internal networks for service isolation
• Resource limits to prevent DoS
• Health checks for reliability
• Diun monitoring with label-based filtering

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📋 Prerequisites

Required

• Synology NAS with DSM 7.x
• Docker & Docker Compose installed via Package Center
• SSH access enabled
• Basic knowledge of Docker and command line

Recommended

• Static IP for your NAS
• Domain name for reverse proxy (optional)
• VPN subscription for Gluetun (AirVPN, Mullvad, etc.)

---

⚙️ Configuration

1. Environment Variables

Edit .env file with your settings:

# System Settings
DOCKERCONFDIR=/volume1/docker/appdata
DOCKERSTORAGEDIR=/volume1/data
PUID=1026
PGID=100
TZ=Africa/Johannesburg

# Docker Logging
DOCKERLOGGING_MAXFILE=3
DOCKERLOGGING_MAXSIZE=10m

# Diun - Image Update Monitoring
DIUN_WATCH_SCHEDULE=0 0 4 * * *
WATCHTOWER_NOTIFICATION_URL=
WATCHTOWER_SCOPE=
WATCHTOWER_LABEL_ENABLE=

# VPN Configuration
VPN_SERVICE_PROVIDER=airvpn
WIREGUARD_PRIVATE_KEY=your_private_key
WIREGUARD_PRESHARED_KEY=your_preshared_key
WIREGUARD_ADDRESSES=10.x.x.x/32
FIREWALL_VPN_INPUT_PORTS=12345
SERVER_COUNTRIES=Netherlands

# Database
POSTGRES_USER=postgres
POSTGRES_PASSWORD=strong_password
POSTGRES_DB=maindb
PGADMIN_EMAIL=admin@example.com
PGADMIN_PASSWORD=strong_password

Get your PUID/PGID:

ssh admin@synology-nas
id $USER

2. Recyclarr Configuration

Copy and configure Recyclarr for quality profile management:

# Copy template
cp RECYCLARR_CONFIG_TEMPLATE.yml /volume1/docker/appdata/recyclarr/recyclarr.yml

# Edit with your API keys
nano /volume1/docker/appdata/recyclarr/recyclarr.yml

Get API Keys:

• Sonarr: Settings → General → Security → API Key
• Radarr: Settings → General → Security → API Key

Important: Use service names (http://sonarr:8989), NOT localhost!

3. Directory Structure

Create required directories:

# Config directories
sudo mkdir -p /volume1/docker/appdata/{gluetun,qbittorrent,sabnzbd,prowlarr,radarr,sonarr,bazarr,emby,jellyseerr,recyclarr,postgres,pgadmin,vault}

# Storage directories
sudo mkdir -p /volume1/data/{torrents,usenet,media}/{movies,tv,music}
sudo mkdir -p /volume1/docker/appdata/postgres/{data,backups}

# Set permissions
sudo chown -R $PUID:$PGID /volume1/docker/appdata
sudo chown -R $PUID:$PGID /volume1/data

# Special: pgAdmin needs specific user
sudo chown -R 5050:5050 /volume1/docker/appdata/pgadmin

---

🚀 Deployment

Option 1: Deploy All Stacks

./substitute_env.sh docker-compose-files/arr-stack_template.yaml docker-compose.arr-stack.yml
./substitute_env.sh docker-compose-files/postgres_template.yaml docker-compose.postgres.yml
./substitute_env.sh docker-compose-files/vault_template.yaml docker-compose.vault.yml

docker-compose -f docker-compose.arr-stack.yml up -d
docker-compose -f docker-compose.postgres.yml up -d
docker-compose -f docker-compose.vault.yml up -d

Option 2: Deploy Specific Stack

# Media stack only
./substitute_env.sh docker-compose-files/arr-stack_template.yaml docker-compose.arr-stack.yml
docker-compose -f docker-compose.arr-stack.yml up -d

# Verify deployment
docker ps
docker logs -f diun

Option 3: Deploy Individual Services

# Start only specific services
docker-compose -f docker-compose.arr-stack.yml up -d socket-proxy gluetun qbittorrent prowlarr radarr sonarr

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🔍 Verification

Check Service Health

# View all containers
docker ps

# Check specific service logs
docker logs socket-proxy
docker logs diun
docker logs gluetun

# Check health status
docker inspect socket-proxy | grep -A 10 Health

Test Socket-Proxy Security

# Should work - Watchtower can list containers
docker exec diun wget -qO- http://socket-proxy:2375/containers/json

# Should fail with 403 - exec is blocked
docker exec diun wget -qO- http://socket-proxy:2375/containers/diun/exec

Test VPN Connection

# Check VPN is connected
docker logs gluetun | grep "connected"

# Test qBittorrent is using VPN
docker exec qbittorrent curl ifconfig.me
# Should show VPN IP, not your real IP

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📊 Resource Allocation

Total resources if all services running:

Resource	Reserved	Limit	Notes
CPU	4.6 cores	19.5 cores	Adjust based on your NAS
Memory	4.44 GB	18.75 GB	Minimum 8GB RAM recommended

Per-service limits configured to prevent resource exhaustion

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🔧 Common Tasks

Update Containers

# Monitored (via Diun)
# Diun checks for updates on schedule defined in DIUN_WATCH_SCHEDULE

# Manual update
docker-compose -f docker-compose.arr-stack.yml pull
docker-compose -f docker-compose.arr-stack.yml up -d

View Logs

# Follow logs
docker logs -f radarr

# Last 100 lines
docker logs --tail 100 sonarr

# All services
docker-compose -f docker-compose.arr-stack.yml logs -f

Restart Service

# Single service
docker-compose -f docker-compose.arr-stack.yml restart radarr

# All services
docker-compose -f docker-compose.arr-stack.yml restart

Stop/Start Stack

# Stop everything
docker-compose -f docker-compose.arr-stack.yml down

# Start everything
docker-compose -f docker-compose.arr-stack.yml up -d

# Stop but keep data
docker-compose -f docker-compose.arr-stack.yml stop

---

📚 Documentation

Detailed Guides

• Socket-Proxy Security - Docker API security implementation
• Diun Configuration - Update monitoring and Discord notifications
• Recyclarr Setup - Quality profile configuration
• Troubleshooting - Common issues and solutions
• Improvements Guide - What changed and why

External Resources

• TRaSH Guides - File structure and quality profiles
• Servarr Wiki - Arr stack documentation
• Gluetun Wiki - VPN configuration

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🛠️ Troubleshooting

Quick Diagnostics

# Check container status
docker ps -a

# Check resource usage
docker stats

# Check networks
docker network ls
docker network inspect vpn_network

# Validate compose file
docker-compose -f docker-compose.arr-stack.yml config

Common Issues

Recyclarr: "base_url must start with http"

Fix: Use service names in recyclarr.yml:

base_url: http://sonarr:8989  # ✅ Correct
base_url: http://localhost:8989  # ❌ Wrong

Diun: Not receiving notifications

Fix: Check socket-proxy is running and Diun can connect:

docker logs socket-proxy
docker logs diun

Diun: Discord webhook not working

Symptoms: No notifications in Discord channel

Fix: Use the Discord webhook URL directly (no conversion needed!):

# In .env file:
DIUN_DISCORD_WEBHOOK_URL=https://discord.com/api/webhooks/1234567890/your_token_here

Verify webhook works:

curl -X POST "YOUR_WEBHOOK_URL" \
  -H "Content-Type: application/json" \
  -d '{"content":"Test notification from Diun setup"}'

See full guide: docs/DIUN.md

qBittorrent: No connection

Fix: Check Gluetun VPN is connected:

docker logs gluetun | grep -i "connected"

Full troubleshooting guide: docs/TROUBLESHOOTING.md

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🔄 Migration from Old Setup

If upgrading from previous configurations:

1. Backup everything:

   docker-compose down
   tar -czf docker-backup-$(date +%Y%m%d).tar.gz /volume1/docker/appdata
   

2. Regenerate compose files:

   ./substitute_env.sh docker-compose-files/arr-stack_template.yaml docker-compose.arr-stack.yml
   

3. Review changes:

   docker-compose -f docker-compose.arr-stack.yml config
   

4. Deploy:

   docker-compose -f docker-compose.arr-stack.yml up -d
   

Migration guide: docs/IMPROVEMENTS.md

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🎯 Best Practices

Security

• ✅ Use socket-proxy for Diun (enabled by default)
• ✅ Use label-based monitoring (diun.enable=true) to control what's monitored
• ✅ Diun only monitors - never auto-updates (safer than auto-update tools)
• ✅ Use strong passwords in .env
• ✅ Never commit .env to git
• ✅ Regularly update containers

Performance

• ✅ Adjust resource limits based on your NAS specs
• ✅ Monitor with docker stats
• ✅ Use SSD for Docker volumes if possible
• ✅ Enable hardware transcoding in Emby/Jellyfin

Maintenance

• ✅ Regular backups of /volume1/docker/appdata
• ✅ Monitor logs for errors
• ✅ Test updates in staging before production
• ✅ Document any custom configurations

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🤝 Contributing

Contributions welcome! Please:

1. Fork the repository
2. Create a feature branch
3. Test your changes thoroughly
4. Submit a pull request

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📝 License

This project is provided as-is for personal and educational use.

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🙏 Credits

• TRaSH Guides - Quality profiles and best practices
• Hotio - Excellent container images
• LinuxServer.io - Container images and documentation
• Gluetun - VPN container

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📧 Support

• Issues: GitHub Issues
• Discussions: GitHub Discussions

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Last Updated: 2025-11-23 Version: 2.0 Compatibility: Synology DSM 7.x, Docker Compose 1.27.0+