Docker build and push voucher/vouch-proxy:latest-arm workflow (vouch/vouch-proxy)

The Docker build and push voucher/vouch-proxy:latest-arm workflow from vouch/vouch-proxy, explained and optimized by Latchkey.

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Source: vouch/vouch-proxy.github/workflows/docker-release-arm.ymlLicense MITView source

What it does

This is the Docker build and push voucher/vouch-proxy:latest-arm workflow from the vouch/vouch-proxy 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)

name: Docker build and push voucher/vouch-proxy:latest-arm

on:
  push:
    branches:
      - master

jobs:
  publish-to-docker-arm:
    runs-on: ubuntu-latest
    env:
      DOCKER_TAG: latest-arm
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Set up Docker Buildx
        id: buildx
        uses: crazy-max/ghaction-docker-buildx@v1
        with:
          version: latest
      - name: List available platforms
        run: echo ${{ steps.buildx.outputs.platforms }}
      - name: Docker login (set DOCKER_USERNAME and DOCKER_PASSWORD in secrets)
        if: ${{ success() && startsWith(github.repository, 'vouch/')}} # Remove this line, if you want everybody to publish to docker hub
        run: docker login -u ${{ secrets.DOCKER_USERNAME }} -p ${{ secrets.DOCKER_PASSWORD }}
      - name: Publish to docker as voucher/vouch-proxy
        if: ${{ success() && startsWith(github.repository, 'vouch/')}}
        run: |
          docker buildx build \
            --platform linux/arm/v7,linux/arm64 \
            --push \
            -t voucher/vouch-proxy:$DOCKER_TAG \
            .
    # Uncomment below to have github build to docker for every user. Watch out for indentation
    #   -
    #     name: Publish to docker as github_user/github_repo
    #     if: ${{ success() && !startsWith(github.repository, 'vouch/')}}
    #     run: |
    #       docker buildx build \
    #         --platform linux/amd64,linux/arm/v7,linux/arm64 \
    #         --push \
    #         -t $GITHUB_REPOSITORY:latest \
    #         .

The same workflow, on Latchkey

Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.

name: Docker build and push voucher/vouch-proxy:latest-arm
 
on:
  push:
    branches:
      - master
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  publish-to-docker-arm:
    timeout-minutes: 30
    runs-on: latchkey-small
    env:
      DOCKER_TAG: latest-arm
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Set up Docker Buildx
        id: buildx
        uses: crazy-max/ghaction-docker-buildx@v1
        with:
          version: latest
      - name: List available platforms
        run: echo ${{ steps.buildx.outputs.platforms }}
      - name: Docker login (set DOCKER_USERNAME and DOCKER_PASSWORD in secrets)
        if: ${{ success() && startsWith(github.repository, 'vouch/')}} # Remove this line, if you want everybody to publish to docker hub
        run: docker login -u ${{ secrets.DOCKER_USERNAME }} -p ${{ secrets.DOCKER_PASSWORD }}
      - name: Publish to docker as voucher/vouch-proxy
        if: ${{ success() && startsWith(github.repository, 'vouch/')}}
        run: |
          docker buildx build \
            --platform linux/arm/v7,linux/arm64 \
            --push \
            -t voucher/vouch-proxy:$DOCKER_TAG \
            .
    # Uncomment below to have github build to docker for every user. Watch out for indentation
    #   -
    #     name: Publish to docker as github_user/github_repo
    #     if: ${{ success() && !startsWith(github.repository, 'vouch/')}}
    #     run: |
    #       docker buildx build \
    #         --platform linux/amd64,linux/arm/v7,linux/arm64 \
    #         --push \
    #         -t $GITHUB_REPOSITORY:latest \
    #         .

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 uses latchkey-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.

1 third-party action is referenced by a movable tag. Pin it 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.

Actions used in this workflow

actions/checkout