# Proxmox Bind Mount Script

A lightweight script to manage bind mounts across multiple Proxmox containers. This script allows for easy configuration of shared storage across containers and persists configuration for subsequent boots.

## Features

- Interactive first-time setup
- Persistent configuration storage
- Path validation
- Safe unmounting and cleanup
- systemd integration
- Reconfiguration support

## Prerequisites

- Proxmox VE installed
- Root or sudo access
- Basic understanding of bind mounts
- ZFS if using ZFS storage (recommended)

## Installation

1. Save the script to `/opt/bindmounts.sh`:
```bash
sudo wget -O /opt/bindmounts.sh https://your-script-location
# or copy manually using your preferred method
```

2. Make the script executable:
```bash
sudo chmod +x /opt/bindmounts.sh
```

3. Create the systemd service file at `/etc/systemd/system/bindmounts.service`:
```ini
[Unit]
Description=Bind mounts for containers
Requires=zfs.target
After=zfs.target

[Service]
ExecStart=/opt/bindmounts.sh up
ExecStop=/opt/bindmounts.sh down

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

4. Enable and start the service:
```bash
sudo systemctl daemon-reload
sudo systemctl enable bindmounts
sudo systemctl start bindmounts
```

## First-Time Setup

On first run, the script will prompt for:
- Mount source path (e.g., /z/media)
- Mount target path (e.g., /media)
- Container base path (e.g., /z/pve)
- Container IDs (space-separated list)

This configuration is stored in `/etc/proxmox-bindmounts.conf`

## Usage

### Basic Commands

1. Mount all configured containers:
```bash
sudo /opt/bindmounts.sh up
```

2. Unmount all containers:
```bash
sudo /opt/bindmounts.sh down
```

3. Reconfigure settings:
```bash
sudo /opt/bindmounts.sh reconfigure
```

### Service Management

Start the service:
```bash
sudo systemctl start bindmounts
```

Stop the service:
```bash
sudo systemctl stop bindmounts
```

Check service status:
```bash
sudo systemctl status bindmounts
```

## Configuration File

The configuration is stored in `/etc/proxmox-bindmounts.conf` with the following format:
```bash
MNT_SOURCE="/path/to/source"
MNT_TARGET="/path/to/target"
CT_BASE="/path/to/container/base"
CT_IDS=(101 102 103)
```

## Security Considerations

- The configuration file is created with 600 permissions (readable only by root)
- The script validates paths before mounting
- Unmounting is performed safely with proper cleanup

## Troubleshooting

1. If mounts fail:
   - Check if source and target paths exist
   - Verify container IDs are correct
   - Check system logs: `journalctl -u bindmounts`

2. If configuration is corrupted:
   - Run `sudo /opt/bindmounts.sh reconfigure`
   - Or manually edit `/etc/proxmox-bindmounts.conf`

## Limitations

- Currently supports one shared mount point across all configured containers
- Requires manual configuration of systemd dependencies if not using ZFS
- Must be run as root or with sudo privileges

## Contributing

Feel free to submit issues and pull requests to improve the script.

## License

This script is provided "as is", without warranty of any kind. Use at your own risk.