如何从docker生成中复制结果而不运行

Question

FROM golang:1.11-alpine as builder
COPY src /go/src/project/src
RUN cd /go/src/project/src && go build -o myBin

Answer 1

您不必运行容器，但必须创建容器，以便能够在之后从该容器中cp（复制）二进制文件。所需的2个命令是：

• Docker容器创建...
• Docker container cp$CONTAINER_NAME:/path/in/container/path/on/host

示例：

main.go：

package main

import "fmt"

func main() {
  fmt.Println("hello world")
}

DockerFile：

FROM golang:1.10-alpine3.7

WORKDIR /go/src/app
COPY . .

RUN go get -d -v ./...
RUN go install -v ./...

CMD ["app"]

build-createtemp容器-copy binary-cleanup：

docker build -t go-build-test .
docker container create --name temp go-build-test
docker container cp temp:/go/bin/app ./
docker container rm temp

~/docker_tests/go-build-test$ ls
app  Dockerfile  main.go
~/docker_tests/go-build-test$ ./app
hello world