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> .

    准备工作

    1. 开启 binfmt_misc 来运行非本地架构 Docker 镜像

    1. docker run --rm --privileged tonistiigi/binfmt:latest --install all

    2. 默认情况下，Docker 会使用旧的构建器，不支持多架构构建。为了创建一个新的支持多架构的构建器，需要运行：

    1. docker buildx create --use --name=mybuilder-cn --driver docker-container --driver-opt image=dockerpracticesig/buildkit:master

    实战

  • 登录dockerhub

    1. docker login

  • 进入源码目录（Dockerfile所在目录）

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

  • 构建

    1. PS ~: docker login
    2. Authenticating with existing credentials...
    3. Login Succeeded
    4. PS ~: docker buildx build --push --platform linux/arm/v7,linux/arm64/v8,linux/amd64 -t insaneloafer/flask-redis:latest .
    5. [+] Building 0.0s (0/0)
    6. error: multiple platforms feature is currently not supported for docker driver. Please switch to a different driver (eg. "docker buildx create --use")
    7. PS ~:
    8. PS ~: docker buildx ls
    9. NAME/NODE       DRIVER/ENDPOINT STATUS  PLATFORMS
    10. desktop-linux   docker
    11. desktop-linux desktop-linux   running linux/amd64, linux/arm64, linux/riscv64, linux/ppc64le, linux/s390x, linux/386, linux/arm/v7, linux/arm/v6
    12. default *       docker
    13. default       default         running linux/amd64, linux/arm64, linux/riscv64, linux/ppc64le, linux/s390x, linux/386, linux/arm/v7, linux/arm/v6
    14. PS ~: docker buildx create --name mybuilder --use
    15. mybuilder
    16. PS ~: docker buildx ls
    17. NAME/NODE       DRIVER/ENDPOINT                STATUS   PLATFORMS
    18. mybuilder *     docker-container
    19. mybuilder0    npipe:////./pipe/docker_engine inactive
    20. desktop-linux   docker
    21. desktop-linux desktop-linux                  running  linux/amd64, linux/arm64, linux/riscv64, linux/ppc64le, linux/s390x, linux/386, linux/arm/v7, linux/arm/v6
    22. default         docker
    23. default       default                        running  linux/amd64, linux/arm64, linux/riscv64, linux/ppc64le, linux/s390x, linux/386, linux/arm/v7, linux/arm/v6
    24. PS ~: docker buildx build --push --platform linux/arm/v7,linux/arm64/v8,linux/amd64 -t insaneloafer/flask-redis:latest .