gzlj2018/ubuntu repository overview

1. your host already has one buildx builder instance named localbuilder (for example):

2. docker run this image:

docker run -it --rm -v /var/run/docker.sock:/var/run/docker.sock -v /root/.docker/buildx/instances:/root/.docker/buildx/instances gzlj2018/ubuntu:18.04-docker bash

3)you can see buildx builder instance by docker buildx ls

1. user host buildx builder instance:

docker buildx use localbuilder

1. run buildx build command in container

cd /opt/

echo "FROM alpine:3.14" > Dockerfile

docker buildx build -t hub.your-company.com/library/alpine:3.14 --platform=linux/amd64,linux/arm64 . --push