使用 buildx 构建多架构镜像

Windows和Mac的桌面版Docker自带buildx命令，但是Linux环境下的Docker需要自行安装buildx （https://github.com/docker/buildx）

https://docs.docker.com/buildx/working-with-buildx/

本节课使用的源码 https://github.com/xiaopeng163/flask-redis

buildx使用

docker buildx build --push --platform linux/arm/v7,linux/arm64/v8,linux/amd64 -t <image_name> .

实战

登录dockerhub

docker login

进入源码目录（Dockerfile所在目录）

git clone https://github.com/insaneloafer/flask-redis
cd flask-redis

构建

PS ~: docker login
Authenticating with existing credentials...
Login Succeeded
PS ~: docker buildx build --push --platform linux/arm/v7,linux/arm64/v8,linux/amd64 -t insaneloafer/flask-redis:latest .
[+] Building 0.0s (0/0)
error: multiple platforms feature is currently not supported for docker driver. Please switch to a different driver (eg. "docker buildx create --use")
PS ~:
PS ~: docker buildx ls
NAME/NODE       DRIVER/ENDPOINT STATUS  PLATFORMS
desktop-linux   docker
desktop-linux desktop-linux   running linux/amd64, linux/arm64, linux/riscv64, linux/ppc64le, linux/s390x, linux/386, linux/arm/v7, linux/arm/v6
default *       docker
default       default         running linux/amd64, linux/arm64, linux/riscv64, linux/ppc64le, linux/s390x, linux/386, linux/arm/v7, linux/arm/v6
PS ~: docker buildx create --name mybuilder --use
mybuilder
PS ~: docker buildx ls
NAME/NODE       DRIVER/ENDPOINT                STATUS   PLATFORMS
mybuilder *     docker-container
mybuilder0    npipe:////./pipe/docker_engine inactive
desktop-linux   docker
desktop-linux desktop-linux                  running  linux/amd64, linux/arm64, linux/riscv64, linux/ppc64le, linux/s390x, linux/386, linux/arm/v7, linux/arm/v6
default         docker
default       default                        running  linux/amd64, linux/arm64, linux/riscv64, linux/ppc64le, linux/s390x, linux/386, linux/arm/v7, linux/arm/v6
PS ~: docker buildx build --push --platform linux/arm/v7,linux/arm64/v8,linux/amd64 -t insaneloafer/flask-redis:latest .