Build and Publish Multi-Arch Docker Image workflow (Autonomy-Logic/openplc-runtime)
The Build and Publish Multi-Arch Docker Image workflow from Autonomy-Logic/openplc-runtime, explained and optimized by Latchkey.
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What it does
This is the Build and Publish Multi-Arch Docker Image workflow from the Autonomy-Logic/openplc-runtime repository, a real project running GitHub Actions. It is shown here with attribution under its MIT license.
Below, Latchkey shows a faster, safer version produced by its optimization engine.
The workflow
name: Build and Publish Multi-Arch Docker Image
on:
push:
tags:
- 'v*'
workflow_dispatch:
inputs:
platforms:
description: 'Platforms to build (comma-separated)'
default: 'linux/amd64,linux/arm64,linux/arm/v7'
required: false
type: string
release_tag:
description: 'Release version tag (e.g., 1.2.3). If provided, also tags as latest.'
required: false
type: string
jobs:
build:
runs-on: ubuntu-latest
permissions:
contents: read
packages: write
steps:
- name: Checkout
uses: actions/checkout@v4
- name: Set up QEMU
uses: docker/setup-qemu-action@v3
- name: Set up Docker Buildx
uses: docker/setup-buildx-action@v3
- name: Login to GHCR
uses: docker/login-action@v3
with:
registry: ghcr.io
username: ${{ secrets.GHCR_USERNAME }}
password: ${{ secrets.GHCR_TOKEN }}
- name: Extract Docker metadata
id: meta
uses: docker/metadata-action@v5
with:
images: ghcr.io/autonomy-logic/openplc-runtime
tags: |
# latest tag only for stable releases (no pre-release suffix like -rc, -beta, etc.)
type=raw,value=latest,enable=${{ (startsWith(github.ref, 'refs/tags/v') && !contains(github.ref, '-')) || inputs.release_tag != '' }}
# Version tag from git tag (e.g., v1.2.3 -> v1.2.3, v1.2.3-rc.1 -> v1.2.3-rc.1)
type=semver,pattern={{raw}}
# Version tag for manual runs with release_tag
type=raw,value=${{ inputs.release_tag }},enable=${{ inputs.release_tag != '' }}
- name: Build and Push Multi-Arch Image
uses: docker/build-push-action@v6
with:
context: .
push: true
platforms: ${{ inputs.platforms || 'linux/amd64,linux/arm64,linux/arm/v7' }}
tags: ${{ steps.meta.outputs.tags }}
labels: ${{ steps.meta.outputs.labels }}
# Bake the GitHub release tag (or the workflow_dispatch
# release_tag override) into the image so /api/version can
# report it back to clients. Falls back to the Dockerfile
# default ("dev") for ad-hoc builds without a release tag.
build-args: |
RUNTIME_VERSION=${{ inputs.release_tag != '' && inputs.release_tag || github.ref_name }}
The same workflow, on Latchkey
Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.
name: Build and Publish Multi-Arch Docker Image on: push: tags: - 'v*' workflow_dispatch: inputs: platforms: description: 'Platforms to build (comma-separated)' default: 'linux/amd64,linux/arm64,linux/arm/v7' required: false type: string release_tag: description: 'Release version tag (e.g., 1.2.3). If provided, also tags as latest.' required: false type: string concurrency: group: ${{ github.workflow }}-${{ github.ref }} cancel-in-progress: true jobs: build: timeout-minutes: 30 runs-on: latchkey-small permissions: contents: read packages: write steps: - name: Checkout uses: actions/checkout@v4 - name: Set up QEMU uses: docker/setup-qemu-action@v3 - name: Set up Docker Buildx uses: docker/setup-buildx-action@v3 - name: Login to GHCR uses: docker/login-action@v3 with: registry: ghcr.io username: ${{ secrets.GHCR_USERNAME }} password: ${{ secrets.GHCR_TOKEN }} - name: Extract Docker metadata id: meta uses: docker/metadata-action@v5 with: images: ghcr.io/autonomy-logic/openplc-runtime tags: | # latest tag only for stable releases (no pre-release suffix like -rc, -beta, etc.) type=raw,value=latest,enable=${{ (startsWith(github.ref, 'refs/tags/v') && !contains(github.ref, '-')) || inputs.release_tag != '' }} # Version tag from git tag (e.g., v1.2.3 -> v1.2.3, v1.2.3-rc.1 -> v1.2.3-rc.1) type=semver,pattern={{raw}} # Version tag for manual runs with release_tag type=raw,value=${{ inputs.release_tag }},enable=${{ inputs.release_tag != '' }} - name: Build and Push Multi-Arch Image uses: docker/build-push-action@v6 with: context: . push: true platforms: ${{ inputs.platforms || 'linux/amd64,linux/arm64,linux/arm/v7' }} tags: ${{ steps.meta.outputs.tags }} labels: ${{ steps.meta.outputs.labels }} # Bake the GitHub release tag (or the workflow_dispatch # release_tag override) into the image so /api/version can # report it back to clients. Falls back to the Dockerfile # default ("dev") for ad-hoc builds without a release tag. build-args: | RUNTIME_VERSION=${{ inputs.release_tag != '' && inputs.release_tag || github.ref_name }}
What changed
- Run on Latchkey managed runners with one line (
runs-on), which apply the fixes below automatically and self-heal transient failures. This example useslatchkey-small; pick the runner size that fits the job. - Cancel superseded runs when a branch or PR gets a newer push.
- Add a job timeout so a hung step cannot burn hours of runner time.
5 third-party actions are referenced by a movable tag. Pin them to the commit SHA (Latchkey resolves and applies this automatically) so a repointed tag cannot change what runs.
What Latchkey heals here
This workflow has steps that commonly fail on transient issues (network, registries, flaky browsers). On Latchkey managed runners they are detected, retried, and self-healed instead of failing your build:
- Container pulls and builds
This workflow runs 1 job per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.