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Docker Scout requires buildx-style provenance+SBOM, not cosign attestations. Replace crane push with docker load + buildx build (--provenance=mode=max --sbom=true) for the installer image. Use buildx imagetools create for the release tag to preserve attestations. Remove cosign/syft from CI. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
86 lines
2.4 KiB
Markdown
86 lines
2.4 KiB
Markdown
# Technical Guide
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Build infrastructure, CI/CD configuration, and project structure for the Talos CM5 Builder.
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## Building locally (ARM64 host required)
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```bash
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make checkouts patches # Clone and patch upstream 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 v1.12.3-k6.12.47-2
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git push origin v1.12.3-k6.12.47-2
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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. Attaches SBOM attestation (cosign + syft)
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3. Pushes the installer image to Docker Hub
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4. 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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| `REGISTRY_USERNAME` | Docker Hub username (org-level) |
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| `REGISTRY_PASSWORD` | Docker Hub access token (org-level) |
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## Runner Setup (Apple Silicon Mac Mini)
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The build runner needs:
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- Docker Desktop with Buildx (arm64 native)
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- Gitea `act_runner` registered with labels: `self-hosted`, `macOS`, `arm64`
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- Sufficient disk space for kernel builds (~20GB)
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```bash
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# Install act_runner via Homebrew
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brew install act_runner
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# Or download directly
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curl -sL https://gitea.com/gitea/act_runner/releases/latest/download/act_runner-darwin-arm64 -o act_runner
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chmod +x act_runner
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# Register
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./act_runner register \
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--instance https://git.openharbor.io \
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--token <runner-token> \
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--name mac-mini \
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--labels self-hosted,macOS,arm64
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# Run as service
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./act_runner daemon
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```
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## Project 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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talos-rpi5/
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sbc-raspberrypi5/ # Overlay patches (Go toolchain bump)
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cosign.pub # Public key for verifying image attestations
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```
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