# VM Bench — Proxmox Image Conversion Frontend

Web GUI and REST API for converting VMware disk images (VMDK, VHD, etc.) into
Proxmox-compatible QCOW2 disks and provisioning VMs with automatic OS and boot
type detection.

## Architecture

```
Browser            vm-bench LXC             Proxmox Host (srv2)
                  (this container)
──→ :5000 ──→  frontend/app.py  ──→  :9000  backend/app.py
                                      │
                                      ├─ qemu-img   (format, size)
                                      ├─ guestfish  (OS, EFI detection)
                                      ├─ 7z/unzip   (archive extraction)
                                      └─ qm create  (VM provisioning)
```

- **Frontend** (`vm-bench` LXC) — FastAPI + Jinja2 web UI on port 5000
- **Backend** (`srv2` Proxmox host) — FastAPI REST API on port 9000
- **Shared storage** — `/mnt/converter/in` (staging) and `/mnt/converter/out` (output)

## Directory Layout

```
/mnt/converter/
├── frontend/                  # Web UI (runs on vm-bench LXC)
│   ├── app.py                 # FastAPI app, routes, session handling
│   ├── api_client.py          # Typed REST client → backend
│   ├── requirements.txt
│   ├── templates/             # Jinja2 HTML templates
│   │   ├── base.html
│   │   ├── index.html         # New session form
│   │   ├── _analysis.html     # Analysis result + confirm form
│   │   └── polling.html       # Progress bar + job status
│   └── static/
│       └── proxmox.css
├── backend/                   # REST API (deploy to Proxmox host srv2)
│   ├── app.py                 # FastAPI app, routes
│   ├── models.py              # Pydantic request/response models
│   ├── converter.py           # Archive extraction, disk probing, OS/EFI detection
│   ├── provisioner.py         # VM provisioning (qm create/importdisk)
│   ├── requirements.txt
│   ├── install.sh             # Systemd installation script
│   └── vm-bench-backend.service
├── open-api.yaml              # API spec (single source of truth)
├── in/                        # Shared staging directory (gitignored)
└── out/                       # Shared output directory (gitignored)
```

## Features

- **File upload or URL download** — ingest `.vmdk`, `.vhd`, `.7z`, `.zip`, `.tar.gz` archives
- **Automatic archive extraction** — 7z, unzip, tar, gunzip
- **Disk analysis** — detects format, virtual size, guest OS, EFI bootability
- **VM provisioning** — creates Proxmox VM with automatic disk import and boot config
- **Progress polling** — real-time job status with progress bar
- **Staging reuse** — keep source files to create multiple VMs from one image

## Prerequisites

### Backend (Proxmox host `srv2`)

- Python 3.13+
- `qemu-img` (from `qemu-utils`)
- `guestfish` (from `libguestfs-tools`)
- `7z`, `unzip`, `tar` (for archive extraction)
- `systemd` (for service management)

### Frontend (`vm-bench` LXC)

- Python 3.13+
- `wget` (for URL downloads)
- `systemd` (for service management)
- Network access to backend at `10.2.0.2:9000`

## Installation

### 1. Backend (on Proxmox host `srv2`)

```bash
# The backend code is shared via /mnt/converter/backend/
cd /mnt/converter/backend
bash install.sh
```

This installs Python dependencies, copies the systemd service, and starts
`vm-bench-backend` on port 9000. Verify:

```bash
curl http://127.0.0.1:9000/api/v1/health
# → {"status":"ok"}
```

### 2. Frontend (on `vm-bench` LXC)

```bash
# Install dependencies
cd /mnt/converter/frontend
pip3 install --break-system-packages -r requirements.txt

# Copy service file and start
cp /etc/systemd/system/vm-bench.service /etc/systemd/system/
systemctl daemon-reload
systemctl enable --now vm-bench
```

The frontend serves on port 5000. Open `http://<vm-bench-ip>:5000` in a browser.

## API Reference

All endpoints are under `/api/v1/`. Full specification in [`open-api.yaml`](open-api.yaml).

| Method | Path | Description |
|--------|------|-------------|
| `GET` | `/api/v1/health` | Health check |
| `POST` | `/api/v1/analyze` | Probe source image (format, size, OS, EFI) |
| `POST` | `/api/v1/jobs` | Submit conversion + provisioning job |
| `GET` | `/api/v1/jobs/{id}` | Poll job status and progress |
| `POST` | `/api/v1/jobs/{id}/cleanup` | Delete or preserve staging files |

### Example: Analyze a source image

```bash
curl -X POST http://10.2.0.2:9000/api/v1/analyze \
  -H "Content-Type: application/json" \
  -d '{"vmid": 21050, "source_filename": "64bit/Debian 12.11.0 (64bit).vmdk"}'

# Response:
# {
#   "vmid": 21050,
#   "filename": "Debian 12.11.0 (64bit).vmdk",
#   "disk_format": "vmdk",
#   "disk_size_gb": 7.5,
#   "os_type": "Debian",
#   "efi_detectable": true
# }
```

### Example: Submit a conversion job

```bash
curl -X POST http://10.2.0.2:9000/api/v1/jobs \
  -H "Content-Type: application/json" \
  -d '{
    "vmid": 21050,
    "vm_name": "debian-test",
    "boot_disk": {
      "disk_type": "image_file",
      "source_filename": "64bit/Debian 12.11.0 (64bit).vmdk",
      "format": "vmdk"
    },
    "cpu_cores": 2,
    "ram_mb": 4096,
    "target_storage": "local-lvm"
  }'

# Response:
# { "job_id": "job_21050_1737480000", "vmid": 21050, "status": "queued", ... }
```

## Usage Flow

1. **Open the web UI** → new session form
2. **Upload or download a source image** → file lands in `/mnt/converter/in/`
3. **Backend analyses the image** → shows format, size, OS, EFI status
4. **Configure VM settings** → name, CPU, RAM, storage, boot type
5. **Submit job** → backend converts, shrinks (if needed), creates VM
6. **Poll progress** → real-time status bar updates every 2 seconds
7. **Reuse or cleanup** → create another VM from same source, or delete staging files

## Configuration

| Variable | Default | Description |
|----------|---------|-------------|
| `BACKEND_URL` | `http://10.2.0.2:9000` | Backend API base URL (set in systemd unit) |
| `VM_ID_MIN` | `21000` | Minimum allowed Proxmox VM ID |
| `VM_ID_MAX` | `21100` | Maximum allowed Proxmox VM ID |

## Development

**Source of truth**: `open-api.yaml` — always derive models from this file.

**Backend tool requirements** (on srv2):
- `qemu-img` — disk format and size detection
- `guestfish` / `virt-inspector` — OS type and EFI boot detection
- `7z`, `unzip`, `tar`, `gunzip`, `bunzip2`, `xz` — archive extraction

**Provisioner note**: `backend/provisioner.py` is currently a stub with simulated
progress. Replace with real `qm create`, `qm importdisk`, and `qm set` commands
when deploying to the Proxmox host.

**Staging files**: `/mnt/converter/in/` and `/mnt/converter/out/` are gitignored —
they contain user data, not code.