Build & Publish Multi-Arch Docker Image workflow (rohitg00/kubectl-mcp-server)
The Build & Publish Multi-Arch Docker Image workflow from rohitg00/kubectl-mcp-server, explained and optimized by Latchkey.
CI health: C - fair
Point runs-on at Latchkey and get run de-duplication, job timeouts, SHA-pinned actions, self-healing for flaky steps, and up to 58% lower cost, applied automatically.
What it does
This is the Build & Publish Multi-Arch Docker Image workflow from the rohitg00/kubectl-mcp-server 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 & Publish Multi-Arch Docker Image
on:
push:
branches: [main]
release:
types: [published]
jobs:
build-and-push:
runs-on: ubuntu-latest
permissions:
contents: read
packages: write
steps:
- uses: actions/checkout@v4
- name: Set up QEMU (for cross-platform builds)
uses: docker/setup-qemu-action@v3
with:
platforms: "arm64,amd64"
- name: Set up Docker Buildx
uses: docker/setup-buildx-action@v3
- name: Login to Docker Hub
uses: docker/login-action@v3
with:
username: ${{ secrets.DOCKERHUB_USERNAME }}
password: ${{ secrets.DOCKERHUB_TOKEN }}
- name: Login to GitHub Container Registry
uses: docker/login-action@v3
with:
registry: ghcr.io
username: ${{ github.actor }}
password: ${{ secrets.GITHUB_TOKEN }}
- name: Extract metadata for Docker
id: meta
uses: docker/metadata-action@v5
with:
images: |
rohitghumare64/kubectl-mcp-server
ghcr.io/${{ github.repository }}
tags: |
type=ref,event=branch
type=semver,pattern={{version}}
type=semver,pattern={{major}}.{{minor}}
type=sha,prefix=
type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v') }}
- name: Build and push multi-arch image
uses: docker/build-push-action@v5
with:
context: .
push: true
platforms: linux/amd64,linux/arm64
tags: ${{ steps.meta.outputs.tags }}
labels: ${{ steps.meta.outputs.labels }}
- name: Update Docker Hub description
uses: peter-evans/dockerhub-description@v4
with:
username: ${{ secrets.DOCKERHUB_USERNAME }}
password: ${{ secrets.DOCKERHUB_TOKEN }}
repository: rohitghumare64/kubectl-mcp-server
readme-filepath: ./README.md
short-description: "MCP server for Kubernetes - AI assistants interact with K8s clusters"
The same workflow, on Latchkey
Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.
name: Build & Publish Multi-Arch Docker Image on: push: branches: [main] release: types: [published] concurrency: group: ${{ github.workflow }}-${{ github.ref }} cancel-in-progress: true jobs: build-and-push: timeout-minutes: 30 runs-on: latchkey-small permissions: contents: read packages: write steps: - uses: actions/checkout@v4 - name: Set up QEMU (for cross-platform builds) uses: docker/setup-qemu-action@v3 with: platforms: "arm64,amd64" - name: Set up Docker Buildx uses: docker/setup-buildx-action@v3 - name: Login to Docker Hub uses: docker/login-action@v3 with: username: ${{ secrets.DOCKERHUB_USERNAME }} password: ${{ secrets.DOCKERHUB_TOKEN }} - name: Login to GitHub Container Registry uses: docker/login-action@v3 with: registry: ghcr.io username: ${{ github.actor }} password: ${{ secrets.GITHUB_TOKEN }} - name: Extract metadata for Docker id: meta uses: docker/metadata-action@v5 with: images: | rohitghumare64/kubectl-mcp-server ghcr.io/${{ github.repository }} tags: | type=ref,event=branch type=semver,pattern={{version}} type=semver,pattern={{major}}.{{minor}} type=sha,prefix= type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v') }} - name: Build and push multi-arch image uses: docker/build-push-action@v5 with: context: . push: true platforms: linux/amd64,linux/arm64 tags: ${{ steps.meta.outputs.tags }} labels: ${{ steps.meta.outputs.labels }} - name: Update Docker Hub description uses: peter-evans/dockerhub-description@v4 with: username: ${{ secrets.DOCKERHUB_USERNAME }} password: ${{ secrets.DOCKERHUB_TOKEN }} repository: rohitghumare64/kubectl-mcp-server readme-filepath: ./README.md short-description: "MCP server for Kubernetes - AI assistants interact with K8s clusters"
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.
6 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.