feat(seedbox): Docker + Tailscale sidecar architecture #1

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# Seedbox Server
Deploys a seedbox with Transmission for maintaining Linux ISO mirrors and OS images.
Docker-based seedbox with Tailscale integration. Each service runs in its own container with a Tailscale sidecar for secure HTTPS access via your tailnet.
## Architecture
```
┌─────────────────────────────────────────────────────────────────┐
│ SEEDBOX │
│ │
│ Tailscale Host (SSH only) │
│ └─► seedbox.taila5ad8.ts.net │
│ │
│ ┌─────────────────────────────────────────────────────────┐ │
│ │ Docker Stacks │ │
│ │ │ │
│ │ ┌─────────────┐ ┌─────────────┐ ┌─────────────┐ │ │
│ │ │ Transmission│ │ Prowlarr │ │ Sonarr │ │ │
│ │ │ + ts-sidecar│ │ + ts-sidecar│ │ + ts-sidecar│ │ │
│ │ └─────────────┘ └─────────────┘ └─────────────┘ │ │
│ │ │ │ │ │ │
│ │ ▼ ▼ ▼ │ │
│ │ transmission. prowlarr. sonarr. │ │
│ │ taila5ad8.ts.net taila5ad8.ts.net taila5ad8.ts.net │ │
│ │ │ │
│ │ ┌─────────────┐ │ │
│ │ │ Portainer │ (optional, for monitoring) │ │
│ │ │ + ts-sidecar│ │ │
│ │ └─────────────┘ │ │
│ │ │ │ │
│ │ ▼ │ │
│ │ portainer.taila5ad8.ts.net │ │
│ └─────────────────────────────────────────────────────────┘ │
│ │
│ Storage: │
│ ├─ /srv/seedbox/downloads (local SSD) │
│ └─ /mnt/media (NFS from NAS) │
└─────────────────────────────────────────────────────────────────┘
```
## Quick Start
### 1. Server Installation
```bash
NFS_SERVER=nas TRANSMISSION_PASS=MySecureP@ss123 \
# With NFS mount
NFS_SERVER=nas curl -fsSL https://gitea.arnodo.fr/Damien/infra-scripts/raw/branch/main/seedbox/install.sh | bash
# Without NFS (configure later)
curl -fsSL https://gitea.arnodo.fr/Damien/infra-scripts/raw/branch/main/seedbox/install.sh | bash
```
> **⚠️ Important:** Always set `TRANSMISSION_PASS` explicitly. If omitted, a random password is generated and displayed only once at the end of the installation. It cannot be recovered afterward without resetting the config.
### 2. Configure Gitea Secrets
## Components
Go to **Gitea > Repository > Settings > Secrets and Variables > Actions** and add:
- **Transmission**: BitTorrent client with WebUI
- **NFS**: Dual mount to NAS for downloads and media storage
- **Tailscale**: Private access to WebUI via `tailscale serve`
- **Docker**: Container runtime
- **UFW**: Firewall (only peer port exposed publicly)
- **fail2ban** + **unattended-upgrades**: Basic hardening
| Secret | Description | Example |
|--------|-------------|---------|
| `TS_AUTHKEY` | Tailscale OAuth client secret | `tskey-client-xxxxx-yyyyyyyy` |
| `SEEDBOX_SSH_KEY` | SSH private key (ed25519) | `-----BEGIN OPENSSH PRIVATE KEY-----...` |
| `TRANSMISSION_USER` | Transmission WebUI username | `admin` |
| `TRANSMISSION_PASS` | Transmission WebUI password | `your-secure-password` |
## Environment Variables
#### Creating Tailscale OAuth Client
| Variable | Default | Description |
|----------|---------|-------------|
| `NFS_SERVER` | *required* | NAS hostname/IP (Tailscale) |
| `NFS_SHARE_DOWNLOAD` | `/volume2/Downloads` | NFS export for downloads |
| `NFS_SHARE_MEDIA` | `/volume2/Multimédia` | NFS export for media/ISOs |
| `NFS_MOUNT_DOWNLOAD` | `/mnt/download` | Local mount for downloads |
| `NFS_MOUNT_MEDIA` | `/mnt/media` | Local mount for media |
| `SEEDBOX_HOSTNAME` | `seedbox` | Server hostname |
| `PEER_PORT` | `51413` | BitTorrent peer port |
| `TRANSMISSION_USER` | `admin` | WebUI username |
| `TRANSMISSION_PASS` | *auto-generated* | WebUI password (⚠️ set explicitly!) |
| `TZ` | `Europe/Paris` | Timezone |
1. Go to https://login.tailscale.com/admin/settings/oauth
2. Click "Generate OAuth Client"
3. Scopes: `devices:write`
4. Copy the **Client Secret** (starts with `tskey-client-`)
Example with custom settings:
#### Creating SSH Deploy Key
```bash
NFS_SERVER=nas \
NFS_SHARE_DOWNLOAD=/volume1/torrents \
NFS_SHARE_MEDIA=/volume1/iso \
TRANSMISSION_USER=damien \
TRANSMISSION_PASS=MySecurePassword \
curl -fsSL https://gitea.arnodo.fr/Damien/infra-scripts/raw/branch/main/seedbox/install.sh | bash
# Generate key pair
ssh-keygen -t ed25519 -f seedbox-deploy -N "" -C "gitea-deploy"
# Add public key to seedbox
ssh debian@seedbox.taila5ad8.ts.net "cat >> ~/.ssh/authorized_keys" < seedbox-deploy.pub
# Copy private key content to Gitea secret SEEDBOX_SSH_KEY
cat seedbox-deploy
```
### Password Recovery
#### Tailscale ACL Configuration
If you forgot to set `TRANSMISSION_PASS` and lost the auto-generated password:
Add this tag to your Tailscale ACL policy (https://login.tailscale.com/admin/acls):
```json
{
"tagOwners": {
"tag:container": ["autogroup:admin"]
},
"acls": [
{
"action": "accept",
"src": ["autogroup:member"],
"dst": ["tag:container:*"]
}
]
}
```
### 3. Deploy Services
Push to the `main` branch to trigger deployment:
```bash
# Option 1: Check the docker-compose.yml (password in clear text)
grep PASS ~/transmission/docker-compose.yml
git push origin main
```
# Option 2: Reset by editing docker-compose.yml
cd ~/transmission
sed -i 's/PASS=.*/PASS=NewPassword/' docker-compose.yml
docker compose down && docker compose up -d
Or create a PR for validation first.
## Services
| Service | URL | Port | Description |
|---------|-----|------|-------------|
| Transmission | `transmission.taila5ad8.ts.net` | 9091 | BitTorrent client |
| Prowlarr | `prowlarr.taila5ad8.ts.net` | 9696 | Indexer manager |
| Sonarr | `sonarr.taila5ad8.ts.net` | 8989 | TV series manager |
| Portainer | `portainer.taila5ad8.ts.net` | 9000 | Docker management UI |
## Directory Structure
```
/srv/seedbox/
├── stacks/
│ ├── transmission/
│ │ ├── docker-compose.yml
│ │ └── serve.json
│ ├── prowlarr/
│ │ ├── docker-compose.yml
│ │ └── serve.json
│ ├── sonarr/
│ │ ├── docker-compose.yml
│ │ └── serve.json
│ └── portainer/
│ ├── docker-compose.yml
│ └── serve.json
├── downloads/ # Local downloads (SSD)
├── .env # Secrets (created by pipeline)
└── .gitea/
└── workflows/
└── deploy.yml # Deployment pipeline
```
## Adding a New Service
1. Create a new directory in `stacks/`:
```bash
mkdir -p seedbox/stacks/myservice
```
2. Create `docker-compose.yml`:
```yaml
services:
ts-myservice:
image: tailscale/tailscale:latest
hostname: myservice
environment:
- TS_AUTHKEY=${TS_AUTHKEY}
- TS_EXTRA_ARGS=--advertise-tags=tag:container
- TS_STATE_DIR=/var/lib/tailscale
- TS_SERVE_CONFIG=/config/serve.json
- TS_USERSPACE=false
volumes:
- ts-state:/var/lib/tailscale
- ./serve.json:/config/serve.json:ro
devices:
- /dev/net/tun:/dev/net/tun
cap_add:
- net_admin
restart: unless-stopped
myservice:
image: myservice/image:latest
container_name: myservice
network_mode: service:ts-myservice
depends_on:
- ts-myservice
environment:
- PUID=1000
- PGID=1000
- TZ=Europe/Paris
volumes:
- config:/config
restart: unless-stopped
volumes:
ts-state:
config:
```
3. Create `serve.json`:
```json
{
"TCP": {
"443": {
"HTTPS": true
}
},
"Web": {
"myservice.taila5ad8.ts.net:443": {
"Handlers": {
"/": {
"Proxy": "http://127.0.0.1:PORT"
}
}
}
}
}
```
4. Commit and push:
```bash
git add seedbox/stacks/myservice/
git commit -m "feat(seedbox): add myservice stack"
git push origin main
```
## Removing a Service
### Option A: Via Git (recommended)
1. Remove the stack directory:
```bash
rm -rf seedbox/stacks/myservice/
git add -A
git commit -m "feat(seedbox): remove myservice stack"
git push origin main
```
2. Manually stop containers on seedbox:
```bash
ssh debian@seedbox.taila5ad8.ts.net
cd /srv/seedbox/stacks/myservice
docker compose down -v
```
3. Remove Tailscale device from admin console
### Option B: Manual (emergency)
```bash
ssh debian@seedbox.taila5ad8.ts.net
cd /srv/seedbox/stacks/myservice
docker compose down -v
rm -rf /srv/seedbox/stacks/myservice
# Remove device from https://login.tailscale.com/admin/machines
```
## Updating Services
### Update Docker Images
The pipeline automatically pulls latest images on each deployment. To force an update:
```bash
# Trigger a new deployment by making any change
git commit --allow-empty -m "chore: trigger deployment"
git push origin main
```
### Manual Update
```bash
ssh debian@seedbox.taila5ad8.ts.net
cd /srv/seedbox/stacks/transmission
docker compose pull
docker compose up -d
```
## Network Access
| Service | Public | Tailscale |
|---------|--------|-----------|
| BitTorrent peers | ✅ Port 51413 | ✅ |
| Transmission WebUI | ❌ | ✅ HTTPS via `tailscale serve` |
| SSH | ❌ | ✅ Tailscale SSH |
| NFS (to NAS) | ❌ | ✅ |
| SSH | ❌ | ✅ `seedbox.taila5ad8.ts.net` |
| Transmission WebUI | ❌ | ✅ HTTPS via sidecar |
| Transmission Peer | ✅ Port 51413 | ✅ |
| Prowlarr | ❌ | ✅ HTTPS via sidecar |
| Sonarr | ❌ | ✅ HTTPS via sidecar |
| Portainer | ❌ | ✅ HTTPS via sidecar |
### WebUI Access
## Troubleshooting
The WebUI is exposed via Tailscale Serve with automatic HTTPS:
```
https://seedbox.<your-tailnet>.ts.net
```
The WebUI binds to `localhost:9091` and is proxied through `tailscale serve`, ensuring it's never accessible from the public internet.
## Storage Architecture
```
NAS (via Tailscale) Seedbox LXC (70GB)
┌─────────────────────┐ ┌─────────────────────┐
│ /volume2/Downloads │◄──── NFS ────►│ /mnt/download │
│ (incomplete + temp) │ │ └► /downloads │
├─────────────────────┤ │ (in container) │
│ /volume2/Multimédia │◄──── NFS ────►│ /mnt/media │
│ (ISOs, VMDK, QCOW) │ │ └► /media │
└─────────────────────┘ │ (in container) │
└─────────────────────┘
```
### Transmission Paths
| Container Path | Host Path | NAS Path | Purpose |
|----------------|-----------|----------|---------|
| `/downloads` | `/mnt/download` | `/volume2/Downloads` | Incomplete + completed torrents |
| `/media` | `/mnt/media` | `/volume2/Multimédia` | Final ISOs, VMDK, QCOW images |
### Recommended Workflow
1. Torrents download to `/downloads` (on NAS via NFS)
2. Once complete, move ISOs to `/media/iso/<distro>/`
3. Proxmox mounts the same NAS share for VM templates
## What it does
1. Sets hostname
2. Installs base packages (vim, fail2ban, unattended-upgrades, nfs-common, at)
3. Installs and connects Tailscale
4. Installs Docker
5. Configures dual NFS mounts to NAS (same as Proxmox)
6. Deploys Transmission container with both mounts
7. Exposes WebUI via `tailscale serve` (HTTPS on tailnet)
8. Configures UFW (peer port public, WebUI via Tailscale only)
9. Temporarily opens SSH port 22 for 5 minutes (safety net)
## SSH Safety Net
During installation, SSH port 22 is temporarily opened for 5 minutes to prevent lockout if you're connected via public IP. After 5 minutes, it will be automatically closed and only Tailscale SSH will work.
### Check container status
```bash
# List scheduled jobs
sudo atq
# Cancel the scheduled SSH closure (replace N with job number)
sudo atrm N
# Manually close SSH port 22 if needed
sudo ufw delete allow 22/tcp
docker ps -a
docker logs ts-transmission
docker logs transmission
```
## Directory Structure
Organize your media by type:
### Check Tailscale sidecar
```bash
docker exec ts-transmission tailscale status
docker exec ts-transmission tailscale serve status
```
/mnt/media/
├── iso/
│ ├── debian/
│ │ └── debian-12.7.0-amd64-netinst.iso
│ ├── ubuntu/
│ │ └── ubuntu-24.04.1-live-server-amd64.iso
│ ├── rhel/
│ │ └── rocky-9.4-x86_64-minimal.iso
│ └── proxmox/
│ └── proxmox-ve_8.2-1.iso
├── vmdk/
│ └── windows-server-2022.vmdk
└── qcow/
└── cloud-init-debian-12.qcow2
### Restart a stack
```bash
cd /srv/seedbox/stacks/transmission
docker compose restart
```
### View all Tailscale devices
```bash
tailscale status
```
### Force re-authentication of sidecar
```bash
cd /srv/seedbox/stacks/transmission
docker compose down
docker volume rm transmission_ts-state
docker compose up -d
```
## NAS Configuration (Synology)
Ensure your NAS exports both shares via NFS:
Ensure your NAS exports the media share via NFS:
1. Control Panel → Shared Folder → Edit → NFS Permissions
2. For each share (`Downloads` and `Multimédia`), add rule:
- Hostname/IP: `*` or Tailscale IP of seedbox (e.g., `100.x.x.x`)
1. **Control Panel → Shared Folder → Edit → NFS Permissions**
2. Add rule:
- Hostname/IP: `100.64.0.0/10` (Tailscale subnet) or specific IP
- Privilege: Read/Write
- Squash: No mapping
- Security: sys
- Enable NFSv4.1: ✅
## Post-install
## Post-install Verification
```bash
# Check NFS mounts
df -h /mnt/download /mnt/media
# Check NFS mount
df -h /mnt/media
# View Transmission logs
cd ~/transmission && docker compose logs -f
# Check Docker
docker ps
# Restart Transmission
cd ~/transmission && docker compose restart
# Check Tailscale devices
tailscale status
# Check tailscale serve status
tailscale serve status
# Move completed ISO to final location
mv /mnt/download/debian-12.iso /mnt/media/iso/debian/
```
## Troubleshooting
### WebUI not accessible
```bash
# Check tailscale serve is running
tailscale serve status
# Restart if needed
sudo tailscale serve --bg http://localhost:9091
# Check container is running
docker ps | grep transmission
# Check container logs
cd ~/transmission && docker compose logs
```
### Reset Transmission credentials
```bash
cd ~/transmission
docker compose down
# Edit docker-compose.yml to change USER and PASS
vim docker-compose.yml
docker compose up -d
# Test service access
curl -k https://transmission.taila5ad8.ts.net
```