cross-compile-go-app-with-buildx

cross-compile-go-app-with-buildx.sh

#!/usr/bin/env bash

set -e

WORKDIR=$(mktemp -d)
cd $WORKDIR

cat << EOF > $WORKDIR/main.go
package main

import "fmt"

func main() {
    fmt.Println("Hello world!")
}
EOF

cat << EOF > $WORKDIR/Dockerfile
FROM --platform=${BUILDPLATFORM} golang:1.14.3-alpine AS build
WORKDIR /src
ENV CGO_ENABLED=0
COPY . .
ARG TARGETOS
ARG TARGETARCH
RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o /out/example .

FROM scratch AS bin
COPY --from=build /out/example /
EOF

BUILDER=cross-compile-go-app
docker buildx create --use --name=$BUILDER
docker buildx inspect --bootstrap $BUILDER

DOCKERID=devopps
docker buildx build \
  --push -t $DOCKERID/hello-cross-compiled:latest \
  --platform=linux/amd64,linux/arm64 .

# cleanup
docker buildx rm $BUILDER

Helpful links down below:

• https://www.docker.com/blog/containerize-your-go-developer-environment-part-1/
• https://medium.com/nttlabs/buildx-multiarch-2c6c2df00ca2
• https://www.padok.fr/en/blog/multi-architectures-docker-iot