Mathias Beaulieu-Duncan
19db31b717
The image supports both RPi 5 and CM5 (same SoC/RP1), so talos-rpi5 is a better public-facing name. The internal build still produces an installer image which gets retagged to svrnty/talos-rpi5:<tag> in the release target. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
90 lines
2.7 KiB
Markdown
90 lines
2.7 KiB
Markdown
# Talos CM5 Builder
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Custom Talos Linux images for Raspberry Pi CM5 on Compute Blade hardware.
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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.
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## What it builds
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- **Installer image** → `docker.io/svrnty/talos-rpi5:<tag>` (for `talosctl upgrade`)
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- **Raw disk image** → Gitea release `metal-arm64.raw.zst` (for eMMC flashing)
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Baked-in config:
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- RPi downstream kernel with CM5/RP1 support
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- Overclock: 2.6GHz (`arm_freq=2600`, `over_voltage_delta=50000`, `arm_boost=1`)
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- Extensions: `iscsi-tools`, `util-linux-tools`
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## Usage
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### Building locally (ARM64 host required)
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```bash
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make checkouts patches # Clone and patch sources
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make kernel # Build RPi kernel
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make overlay # Build SBC overlay
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make installer # Build installer + disk image
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```
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### CI/CD (Gitea Actions)
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Push a version tag to trigger an automated build:
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```bash
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git tag v1.11.5-1
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git push origin v1.11.5-1
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```
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The pipeline runs on the ARM64 self-hosted runner and:
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1. Builds the kernel, overlay, and installer
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2. Pushes the installer image to Docker Hub
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3. Creates a Gitea release with the raw disk image
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### Upstream update checks
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A weekly scheduled workflow checks for new Talos and RPi kernel releases and creates Gitea issues when updates are available.
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## CI Secrets
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| Secret | Description |
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|--------|-------------|
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| `DOCKERHUB_USERNAME` | Docker Hub username |
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| `DOCKERHUB_TOKEN` | Docker Hub access token |
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| `GITEA_TOKEN` | Gitea API token (for creating releases and issues) |
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## Runner Setup (ASUS GX10)
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The ARM64 build runner needs:
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- Docker + Docker Buildx
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- Gitea `act_runner` registered with labels: `self-hosted`, `linux`, `arm64`
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- Sufficient disk space for kernel builds (~20GB)
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```bash
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# Install act_runner
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curl -sL https://gitea.com/gitea/act_runner/releases/latest/download/act_runner-linux-arm64 -o act_runner
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chmod +x act_runner
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# Register
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./act_runner register --instance <gitea-url> --token <runner-token>
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# Run as service
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./act_runner daemon
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```
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## Structure
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```
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.gitea/workflows/
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build.yaml # Build pipeline (tag push trigger)
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check-updates.yaml # Upstream update checker (weekly cron)
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Makefile # Build orchestration
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config/
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config.txt.append # CM5 overclock settings
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extensions.yaml # System extensions list
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scripts/
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check-upstream.sh # Version comparison script
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patches/
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siderolabs/
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pkgs/0001-*.patch # RPi kernel patch
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talos/0001-*.patch # Module list patch
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```
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