Publish Docker Image workflow (blacktop/ipsw)
The Publish Docker Image workflow from blacktop/ipsw, explained and optimized by Latchkey.
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What it does
This is the Publish Docker Image workflow from the blacktop/ipsw 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
workflow (.yml)
# This workflow uses actions that are not certified by GitHub.
# They are provided by a third-party and are governed by
# separate terms of service, privacy policy, and support
# documentation.
name: Publish Docker Image
on:
push:
tags:
- "v*.*.*"
jobs:
push_to_registries:
name: Push Docker image to multiple registries
runs-on: ubuntu-latest
permissions:
packages: write
contents: read
steps:
- name: Check out the repo
uses: actions/checkout@v7
- name: Extract metadata (tags, labels) for Docker
id: meta
uses: docker/metadata-action@v6
with:
images: |
blacktop/ipsw
ghcr.io/${{ github.repository }}
- name: Set up QEMU
uses: docker/setup-qemu-action@v4
- name: Set up Docker Buildx
uses: docker/setup-buildx-action@v4
- name: Docker Login
uses: docker/login-action@v4
with:
username: ${{ secrets.DOCKER_USERNAME }}
password: ${{ secrets.DOCKERHUB_TOKEN }}
- name: Log in to the Container registry
uses: docker/login-action@v4
with:
registry: ghcr.io
username: ${{ github.actor }}
password: ${{ secrets.GITHUB_TOKEN }}
- name: Build and push Docker image
id: docker_build
uses: docker/build-push-action@v7
with:
context: .
push: ${{ github.event_name != 'pull_request' }}
tags: ${{ steps.meta.outputs.tags }}
platforms: linux/amd64,linux/arm64
labels: ${{ steps.meta.outputs.labels }}
build-args: |
VERSION=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.version'] }}
COMMIT=${{ github.event.pull_request.head.sha || github.sha }}
- name: Build and push DAEMON Docker image
id: docker_daemon_build
uses: docker/build-push-action@v7
with:
context: .
file: Dockerfile.daemon
push: ${{ github.event_name != 'pull_request' }}
tags: |
blacktop/ipswd:latest
ghcr.io/blacktop/ipswd:latest
platforms: linux/amd64,linux/arm64
labels: ${{ steps.meta.outputs.labels }}
build-args: |
VERSION=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.version'] }}
COMMIT=${{ github.event.pull_request.head.sha || github.sha }}
The same workflow, on Latchkey
Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.
# This workflow uses actions that are not certified by GitHub. # They are provided by a third-party and are governed by # separate terms of service, privacy policy, and support # documentation. name: Publish Docker Image on: push: tags: - "v*.*.*" concurrency: group: ${{ github.workflow }}-${{ github.ref }} cancel-in-progress: true jobs: push_to_registries: timeout-minutes: 30 name: Push Docker image to multiple registries runs-on: latchkey-small permissions: packages: write contents: read steps: - name: Check out the repo uses: actions/checkout@v7 - name: Extract metadata (tags, labels) for Docker id: meta uses: docker/metadata-action@v6 with: images: | blacktop/ipsw ghcr.io/${{ github.repository }} - name: Set up QEMU uses: docker/setup-qemu-action@v4 - name: Set up Docker Buildx uses: docker/setup-buildx-action@v4 - name: Docker Login uses: docker/login-action@v4 with: username: ${{ secrets.DOCKER_USERNAME }} password: ${{ secrets.DOCKERHUB_TOKEN }} - name: Log in to the Container registry uses: docker/login-action@v4 with: registry: ghcr.io username: ${{ github.actor }} password: ${{ secrets.GITHUB_TOKEN }} - name: Build and push Docker image id: docker_build uses: docker/build-push-action@v7 with: context: . push: ${{ github.event_name != 'pull_request' }} tags: ${{ steps.meta.outputs.tags }} platforms: linux/amd64,linux/arm64 labels: ${{ steps.meta.outputs.labels }} build-args: | VERSION=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.version'] }} COMMIT=${{ github.event.pull_request.head.sha || github.sha }} - name: Build and push DAEMON Docker image id: docker_daemon_build uses: docker/build-push-action@v7 with: context: . file: Dockerfile.daemon push: ${{ github.event_name != 'pull_request' }} tags: | blacktop/ipswd:latest ghcr.io/blacktop/ipswd:latest platforms: linux/amd64,linux/arm64 labels: ${{ steps.meta.outputs.labels }} build-args: | VERSION=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.version'] }} COMMIT=${{ github.event.pull_request.head.sha || github.sha }}
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.