How to build docker image for multi-arch

Using Docker Buildx (Cross-platform emulation)

./build-multi-arch.sh runtime-16 runtime 16.20.2
./build-multi-arch.sh runtime-18.15 runtime 18.15.0
./build-multi-arch.sh buildpack-18.15 buildpack 18.15.0

Using GitHub Actions Workflow

Use the "Build Multi-Arch Docker Images (Native Runners)" workflow in GitHub Actions with workflow_dispatch trigger. This uses a digest-based approach for robust multi-arch builds.

Example parameters:

• docker_dir: runtime-18.15
• image_name: runtime
• tag_prefix: 18.15.0
• dockerfile: Dockerfile (optional)

Prerequisites: Set up DOCKERHUB_USERNAME and DOCKERHUB_TOKEN secrets in your GitHub repository.

Manual Native Build Process

# Build for each platform natively
./build-native.sh runtime-18.15 runtime 18.15.0 linux/amd64
./build-native.sh runtime-18.15 runtime 18.15.0 linux/arm64

# Create multi-arch manifest
./create-manifest.sh runtime 18.15.0