Multi-platform Images¶

The CI workflow publishes multi-arch images for linux/amd64 and linux/arm64. This page shows how to reproduce that locally.

Create and Use a Buildx Builder¶

docker buildx create --name devops-multiarch --use --driver docker-container
docker buildx inspect --bootstrap

Build and Load a Single Platform Locally¶

Use this when you want a fast local test on your current architecture.

docker buildx build \
  --platform linux/amd64 \
  --target all-devops \
  -t all-devops:amd64-local \
  --load .

Build and Push Multi-arch to a Registry¶

export IMAGE="ghcr.io/jinalshah/devops/images/all-devops"
export VERSION="1.0.$(git rev-parse --short HEAD)"

docker buildx build \
  --platform linux/amd64,linux/arm64 \
  --target all-devops \
  -t "$IMAGE:$VERSION" \
  -t "$IMAGE:latest" \
  --push .

Repeat the same pattern for:

• ghcr.io/jinalshah/devops/images/aws-devops
• ghcr.io/jinalshah/devops/images/gcp-devops
• registry.gitlab.com/jinal-shah/devops/images/<image>
• js01/<image>

Verify Manifest and Platforms¶

docker buildx imagetools inspect ghcr.io/jinalshah/devops/images/all-devops:latest

Notes¶

• --load supports single-platform output into local Docker engine.
• Multi-platform output generally requires --push (registry output).
• Prefer immutable version tags in automation.