构建基于多CPU的镜像包，试用的是docker buildx
Docker 19.03及以上的版本支持docker buildx build命令使用 BuildKit 来构建镜像。通过--platform参数可以支持构建多架构的Docker镜像。
新建builder实例：
由于Docker默认的builder实例不支持同时指定多个--platform，所以必须先创建一个新的builder实例。使用如下命令
docker buildx create --use --name=mybuilder-cn --driver docker-container --driver-opt image=dockerpracticesig/buildkit:master
可以使用 docker buildx ls来查看当前的实例
基于GO语言的多版本构建
main.go
package main import "fmt" func main(){ fmt.Println("Hello golang!") }
Dockerfile
tianxingdeMacBook-Pro:go-01 tianxing$ cat Dockerfile FROM --platform=$BUILDPLATFORM golang:1.14 as builder ARG TARGETARCH WORKDIR /app COPY main.go /app/main.go RUN mkdir /app/output RUN GOOS=linux GOARCH=$TARGETARCH go build -a -o output/main main.go FROM alpine:latest WORKDIR /root COPY --from=builder /app/output/main . CMD /root/main tianxingdeMacBook-Pro:go-01 tianxing$
tianxingdeMacBook-Pro:go-web tianxing$ docker buildx build -t swr.cn-north-4.myhuaweicloud.com/metrics/go-web:v1.0.1 --platform=linux/arm64,linux/amd64 . --push [+] Building 41.6s (23/24) => [internal] load build definition from Dockerfile 0.0s => => transferring dockerfile: 331B 0.0s => [internal] load .dockerignore 0.0s => => transferring context: 2B 0.0s => [linux/arm64 internal] load metadata for docker.io/library/alpine:latest 6.4s => [linux/amd64 internal] load metadata for docker.io/library/golang:1.14 41.4s => [linux/amd64 internal] load metadata for docker.io/library/alpine:latest 6.3s => [auth] library/golang:pull token for registry-1.docker.io 0.0s => [auth] library/alpine:pull token for registry-1.docker.io 0.0s => [linux/amd64 builder 1/5] FROM docker.io/library/golang:1.14@sha256:1a7173b5b9a3af3e29a5837e0b2027e1c438fd1b83bbee8f221355087ad416d6 0.0s => => resolve docker.io/library/golang:1.14@sha256:1a7173b5b9a3af3e29a5837e0b2027e1c438fd1b83bbee8f221355087ad416d6 0.0s => [linux/arm64 stage-1 1/3] FROM docker.io/library/alpine:latest@sha256:4edbd2beb5f78b1014028f4fbb99f3237d9561100b6881aabbf5acce2c4f9454 0.0s => => resolve docker.io/library/alpine:latest@sha256:4edbd2beb5f78b1014028f4fbb99f3237d9561100b6881aabbf5acce2c4f9454 0.0s => [linux/amd64 stage-1 1/3] FROM docker.io/library/alpine:latest@sha256:4edbd2beb5f78b1014028f4fbb99f3237d9561100b6881aabbf5acce2c4f9454 0.0s => => resolve docker.io/library/alpine:latest@sha256:4edbd2beb5f78b1014028f4fbb99f3237d9561100b6881aabbf5acce2c4f9454 0.0s => [internal] load build context 0.0s => => transferring context: 432B 0.0s => CACHED [linux/amd64 builder 2/5] WORKDIR /app 0.0s => [linux/amd64 builder 3/5] COPY main.go /app/main.go 0.0s => [linux/amd64 builder 4/5] RUN mkdir /app/output 0.1s => [linux/amd64 builder 4/5] RUN mkdir /app/output 0.1s => [linux/amd64 builder 5/5] RUN GOOS=linux GOARCH=arm64 go build -a -o output/main main.go 24.5s => [linux/amd64 builder 5/5] RUN GOOS=linux GOARCH=amd64 go build -a -o output/main main.go 25.8s => CACHED [linux/arm64 stage-1 2/3] WORKDIR /root 0.0s => [linux/arm64 stage-1 3/3] COPY --from=builder /app/output/main . 0.1s => CACHED [linux/amd64 stage-1 2/3] WORKDIR /root 0.0s => [linux/amd64 stage-1 3/3] COPY --from=builder /app/output/main . 0.0s => exporting to image 8.7s => => exporting layers 0.6s => => exporting manifest sha256:13356a0c40ffbddf60f463f7b2e49e8838db0694d15fadb150327d0b892ec7ca 0.0s => => exporting config sha256:b0ebb435e5a6c84ef45cc8394495f16da523ec36e06f662e4e77f9191bf9ee21 0.0s => => exporting manifest sha256:9a494feed8350b8bba4413923b4661552063279d65c90409a4f51b2d57ce651a 0.0s => => exporting config sha256:5fa0e67792be756550cf2dc203e8937b5f35fbdbcca853ec59a156214b28e732 0.0s => => exporting manifest list sha256:75f6efa3fd2bbc892866858da7fc3dade540193fd6166d357836b7046e89e783 0.0s => => pushing layers 6.8s => => pushing manifest for swr.cn-north-4.myhuaweicloud.com/metrics/go-web:v1.0.1@sha256:75f6efa3fd2bbc892866858da7fc3dade540193fd6166d357836b7046e89e783 1.2s => [auth] metrics/go-web:,pull,push token for swr.cn-north-4.myhuaweicloud.com 0.0s => [auth] metrics/go-web:,pull,push token for swr.cn-north-4.myhuaweicloud.com 0.0s tianxingdeMacBook-Pro:go-web tianxing$
ARM机器上验证
[root@ecs-arm-ky-002 ~]# docker pull swr.cn-north-4.myhuaweicloud.com/metrics/go-tx:v1.0.1 v1.0.1: Pulling from metrics/go-tx 9981e73032c8: Pull complete d4acba5e453a: Pull complete Digest: sha256:05811553ec28ec12ee1e71a94e88da6dc91898a2c699b21a48743c7196cb92f3 Status: Downloaded newer image for swr.cn-north-4.myhuaweicloud.com/metrics/go-tx:v1.0.1 swr.cn-north-4.myhuaweicloud.com/metrics/go-tx:v1.0.1 [root@ecs-arm-ky-002 ~]# docker run --rm swr.cn-north-4.myhuaweicloud.com/metrics/go-tx:v1.0.1 Hello golang!
AMD机器上验证
