docker buildx 多平台构建并推送到私有仓库

使用以下命令来检查是否已安装该插件：

$ docker buildx version
github.com/docker/buildx v0.6.1-docker 260d07a9a19b03df969787496419a0808a27ac61

安装模拟器（用于多平台镜像构建）

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

创建一个新的 builder 实例
如果私有仓库是http没有证书的情况下需要指定--driver-opt network=host 和 --config /etc/buildkit/buildkitd.toml 两个参数，另外需要在/etc/docker/daemon.json中添加"insecure-registries": ["image.xxxxxx.com"]
其中buildkitd.toml内容为：

debug = true
# insecure-entitlements allows insecure entitlements, disabled by default.
insecure-entitlements = [ "network.host", "security.insecure" ]# optionally mirror configuration can be done by defining it as a registry.
[registry."image.xxxxxx.com"]http = trueinsecure = true

创建命令：

docker buildx create --name mybuilder --use --driver-opt network=host --config /etc/buildkit/buildkitd.toml

使用以下命令为 builder 实例添加多个平台

$ docker buildx inspect --bootstrap
Name:   mybuilder
Driver: docker-containerNodes:
Name:      mybuilder0
Endpoint:  unix:///var/run/docker.sock
Status:    running
Platforms: linux/amd64, linux/amd64/v2, linux/amd64/v3, linux/arm64, linux/riscv64, linux/ppc64, linux/ppc64le, linux/s390x, linux/386, linux/mips64le, linux/mips64, linux/arm/v7, linux/arm/v6

查看实例是否正确
没有执行docker buildx inspect --bootstrap之前状态：

$ docker buildx ls
NAME/NODE DRIVER/ENDPOINT             STATUS   PLATFORMS
mybuilder *      docker-container                     mybuilder0     unix:///var/run/docker.sock inactive 
default   docker                               default default                     running  linux/amd64, linux/arm64, linux/riscv64, linux/ppc64le, linux/s390x, linux/386, linux/arm/v7, linux/arm/v6

执行后状态：

$ docker buildx ls
NAME/NODE DRIVER/ENDPOINT             STATUS  PLATFORMS
mybuilder *      docker-container                    mybuilder0     unix:///var/run/docker.sock running linux/amd64, linux/amd64/v2, linux/amd64/v3, linux/arm64, linux/riscv64, linux/ppc64, linux/ppc64le, linux/s390x, linux/386, linux/mips64le, linux/mips64, 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

构建镜像并推送

FROM alpine
ARG TARGETPLATFORM
ARG BUILDPLATFORM
RUN echo "I am running on $BUILDPLATFORM, building for $TARGETPLATFORM"

docker buildx build --platform linux/arm64,linux/amd64 -t image.xxxxxx.com/release/test:1.0.0 --push .