ci workflow (moby/swarmkit)

The ci workflow from moby/swarmkit, explained and optimized by Latchkey.

CI health: C - fair

Point runs-on at Latchkey and get run de-duplication, job timeouts, self-healing for flaky steps, and up to 58% lower cost, applied automatically.

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Source: moby/swarmkit.github/workflows/ci.ymlLicense Apache-2.0View source

What it does

This is the ci workflow from the moby/swarmkit repository, a real project running GitHub Actions. It is shown here with attribution under its Apache-2.0 license.

Below, Latchkey shows a faster, safer version produced by its optimization engine.

The workflow

workflow (.yml)

name: ci

on:
  push:
    branches:
      - master
      - main
  pull_request:

env:
  DOCKER_SWARMKIT_USE_CONTAINER: 1
  IMAGE_NAME: moby/swarmkit

permissions:
  contents: read

jobs:
  build-dev:
    runs-on: ubuntu-22.04
    steps:
      -
        name: Checkout
        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
      -
        name: Build dev image
        uses: docker/bake-action@6614cfa25eff9a0b2b2697efb0b6159e7680d584 # v7.2.0
        with:
          targets: dev
          set: |
            *.cache-from=type=gha,scope=dev${{ matrix.mode }}
            *.cache-to=type=gha,scope=dev${{ matrix.mode }},mode=max
            *.output=type=cacheonly

  test:
    runs-on: ubuntu-22.04
    needs:
      - build-dev
    strategy:
      fail-fast: false
      matrix:
        target:
          - coverage
          - coverage-integration
          - swarmd-tests
    steps:
      -
        name: Checkout
        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
        with:
          fetch-depth: 0
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
      -
        name: Build dev image
        uses: docker/bake-action@6614cfa25eff9a0b2b2697efb0b6159e7680d584 # v7.2.0
        with:
          targets: dev
          set: |
            *.cache-from=type=gha,scope=dev
      -
        name: Test
        run: |
          make IMAGE_NAME=$IMAGE_NAME ${{ matrix.target }}
      -
        if: ${{ startsWith(matrix.target, 'coverage') }}
        name: Send to Codecov
        uses: codecov/codecov-action@e79a6962e0d4c0c17b229090214935d2e33f8354 # v6.0.1
        with:
          env_vars: RUNNER_OS
          flags: ${{ matrix.target }}

The same workflow, on Latchkey

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

name: ci
 
on:
  push:
    branches:
      - master
      - main
  pull_request:
 
env:
  DOCKER_SWARMKIT_USE_CONTAINER: 1
  IMAGE_NAME: moby/swarmkit
 
permissions:
  contents: read
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build-dev:
    timeout-minutes: 30
    runs-on: latchkey-small
    steps:
      -
        name: Checkout
        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
      -
        name: Build dev image
        uses: docker/bake-action@6614cfa25eff9a0b2b2697efb0b6159e7680d584 # v7.2.0
        with:
          targets: dev
          set: |
            *.cache-from=type=gha,scope=dev${{ matrix.mode }}
            *.cache-to=type=gha,scope=dev${{ matrix.mode }},mode=max
            *.output=type=cacheonly
 
  test:
    timeout-minutes: 30
    runs-on: latchkey-small
    needs:
      - build-dev
    strategy:
      fail-fast: false
      matrix:
        target:
          - coverage
          - coverage-integration
          - swarmd-tests
    steps:
      -
        name: Checkout
        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
        with:
          fetch-depth: 0
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
      -
        name: Build dev image
        uses: docker/bake-action@6614cfa25eff9a0b2b2697efb0b6159e7680d584 # v7.2.0
        with:
          targets: dev
          set: |
            *.cache-from=type=gha,scope=dev
      -
        name: Test
        run: |
          make IMAGE_NAME=$IMAGE_NAME ${{ matrix.target }}
      -
        if: ${{ startsWith(matrix.target, 'coverage') }}
        name: Send to Codecov
        uses: codecov/codecov-action@e79a6962e0d4c0c17b229090214935d2e33f8354 # v6.0.1
        with:
          env_vars: RUNNER_OS
          flags: ${{ matrix.target }}

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.

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 2 jobs (4 with the matrix expanded) 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 docker/setup-buildx-action codecov/codecov-action