# AdGuardHome Config Backup Script

This project provides a Bash script to back up the AdGuardHome configuration file (`AdGuardHome.yaml`) from multiple remote servers via SSH.

The script supports:

- Backup of multiple servers defined in a `.env` file
- Timestamped backup files named using the server's hostname
- Logging of each backup session
- Optional notifications via [ntfy.sh](https://ntfy.sh/) and Discord

---

## 📦 Features

- SSH key authentication
- Environment-based configuration
- Per-host backup with hostname and timestamp
- Automatic log file generation
- Optional failure/success notifications

---

## 🛠️ Requirements

- Bash
- `ssh` and `scp` installed
- A valid SSH private key
- Optional: `curl` (for notifications)

---

## 🧾 Setup

### 1. Clone the repository

```bash
git clone https://github.com/youruser/adguard-backup-script.git
cd adguard-backup-script
```

### 2. Configure the `.env` file

Copy and edit the sample `.env` file:

```env
# SSH Settings
HA_SSH_KEY="$HOME/.ssh/id_rsa"
HA_SSH_USER="youruser"

# Backup destination (local path)
BACKUP_DEST="/your/backup/directory"

# Remote config path (optional override)
REMOTE_FILE="/opt/AdGuardHome/AdGuardHome.yaml"

# List of remote servers (space-separated)
SERVER_LIST="server1.example.com server2.example.com 192.168.1.100"

# Notification options (optional)
NTFY_ENABLED=true
NTFY_SERVER="https://ntfy.yourdomain.com"
NTFY_TOPIC="adguard-backups"

DISCORD_ENABLED=true
DISCORD_WEBHOOK_URL="https://discord.com/api/webhooks/..."
```

### 3. Make the script executable

```bash
chmod +x backup_adguard.sh
```

### 4. Run the backup

```bash
./backup_adguard.sh
```

---

## 🗂️ Backup Output

- Files saved to: `$BACKUP_DEST`
- Naming convention: `AdGuardHome.yaml-<hostname>-<timestamp>`
- Example: `AdGuardHome.yaml-server1-2025-06-23_14-45-01`

---

## 🔔 Notifications (Optional)

### ntfy
- Configure `NTFY_ENABLED=true`, `NTFY_SERVER`, and `NTFY_TOPIC` in your `.env`.

### Discord
- Set `DISCORD_ENABLED=true` and supply your `DISCORD_WEBHOOK_URL`.

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## 🧪 Sanity Checks

The script will validate:
- SSH key path
- SSH user
- Backup destination
- Server list
- Notification credentials (if enabled)

---

## 📜 Log Files

Each run generates a log file:
- Location: `$BACKUP_DEST`
- Format: `backup-<timestamp>.log`

Example:
```
backup-2025-06-23_14-45-01.log
```

---

## 💡 Tips

- Use cron to automate the script (e.g., daily backups).
- Ensure your SSH key is authorized on all target servers.
- Monitor logs or enable notifications for unattended runs.

---

## 📄 License

MIT License

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## 🤝 Contributing

Feel free to fork, submit PRs, or suggest improvements!