# Talos CM5 Builder

Custom Talos Linux images for Raspberry Pi 5 / CM5 on Compute Blade hardware.

[![Docker Hub](https://img.shields.io/docker/v/svrnty/talos-rpi5?sort=semver&label=talos-rpi5&logo=docker&arch=arm64)](https://hub.docker.com/r/svrnty/talos-rpi5)
[![Docker Pulls](https://img.shields.io/docker/pulls/svrnty/talos-rpi5?logo=docker)](https://hub.docker.com/r/svrnty/talos-rpi5)
[![Docker Image Size](https://img.shields.io/docker/image-size/svrnty/talos-rpi5?sort=semver&logo=docker&arch=arm64)](https://hub.docker.com/r/svrnty/talos-rpi5)

The official Talos Image Factory does not support CM5 — the mainline kernel lacks CM5 device trees and RP1 driver support. This builder uses the RPi downstream kernel (via [talos-rpi5/talos-builder](https://github.com/talos-rpi5/talos-builder) patches) to produce working CM5 images with our extensions and overclock config.

## Current versions

| Component | Version | |
|-----------|---------|---|
| Talos Linux | `v1.12.3` | [![](https://img.shields.io/docker/v/svrnty/talos-rpi5?sort=semver&label=latest&logo=docker&arch=arm64)](https://hub.docker.com/r/svrnty/talos-rpi5) |
| RPi Kernel | `6.12.47` | arm64 only |
| iscsi-tools | `v0.1.6` | |
| util-linux-tools | `2.40.4` | |

## Image tags

Release images are published to [`docker.io/svrnty/talos-rpi5`](https://hub.docker.com/r/svrnty/talos-rpi5) with the format:

```
v<talos>-k<kernel>-<revision>
```

For example: `v1.12.3-k6.12.47-2`

| Segment | Meaning |
|---------|---------|
| `v1.12.3` | Upstream Talos Linux version |
| `k6.12.47` | RPi downstream kernel version |
| `2` | Build revision (bumped for config/patch changes on the same upstream versions) |

## Usage

### Install from raw disk image

Download `metal-arm64.raw.zst` from the [latest release](../../releases/latest) and flash to eMMC:

```bash
zstd -d metal-arm64.raw.zst -o metal-arm64.raw
# Flash to eMMC/SD via your preferred tool (dd, balenaEtcher, etc.)
```

### Upgrade an existing node

```bash
talosctl upgrade --image docker.io/svrnty/talos-rpi5:v1.12.3-k6.12.47-2
```

### What's included

- RPi downstream kernel with CM5/RP1 support
- Overclock: 2.6GHz (`arm_freq=2600`, `over_voltage_delta=50000`, `arm_boost=1`)
- Extensions: `iscsi-tools`, `util-linux-tools`

## Building

For local builds, CI/CD setup, runner configuration, and project structure, see [TECHNICAL.md](TECHNICAL.md).

## License

This project is licensed under the [Mozilla Public License 2.0](LICENSE).

It builds upon the following MPL 2.0 licensed upstream projects:

- [siderolabs/talos](https://github.com/siderolabs/talos) — Talos Linux OS
- [siderolabs/pkgs](https://github.com/siderolabs/pkgs) — Talos package definitions
- [talos-rpi5/sbc-raspberrypi5](https://github.com/talos-rpi5/sbc-raspberrypi5) — Raspberry Pi 5 SBC overlay

Our patches to these projects are in the `patches/` directory and are distributed under the same MPL 2.0 terms.