docker buildx构建多平台镜像 - Fri, May 22, 2020

docker buildx构建多平台镜像

1. 概述

Docker Buildx是docker19.03的experimental feature，使用时需要打开experimental

~/.docker/config.json

{
    "experimental": "enabled",
    "debug": true
}

2. 使用

buildx配置文件

[registry."docker.io"]
    mirrors = ["reg-mirror.qiniu.com"]
    
[registry."192.168.1.118:5000"]
    http = true
    insecure = true

mirrors: 镜像加速器地址 http和insecure: 允许非安全的http仓库地址

创建buildx句柄

docker buildx create --use --name mybuilder --config=/home/${USER}/.docker/buildx/config.toml

查看支持的平台

#$ docker buildx ls
NAME/NODE    DRIVER/ENDPOINT             STATUS  PLATFORMS
mybuilder *  docker-container                    
  mybuilder0 unix:///var/run/docker.sock running linux/amd64, linux/386
default      docker                              
  default    default                     running linux/amd64, linux/386

启用binfmt转换

docker run --privileged --rm tonistiigi/binfmt --install all
docker run --rm --privileged multiarch/qemu-user-static --reset -p yes

再次查看

#$ docker buildx ls
NAME/NODE    DRIVER/ENDPOINT             STATUS  PLATFORMS
mybuilder *  docker-container                    
  mybuilder0 unix:///var/run/docker.sock 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/386

使用docker buildx创建镜像

docker buildx build --platform linux/amd64,linux/arm64 .