Go镜像可以怎么玩

将go程序打包成docker镜像部署

FROM golang:1.19

WORKDIR /usr/src/app

# pre-copy/cache go.mod for pre-downloading dependencies and only redownloading them in subsequent builds if they change
COPY go.mod go.sum ./
RUN go mod download && go mod verify

COPY . .
RUN go build -v -o /usr/local/bin/app ./...

CMD ["app"]

docker build -t my-golang-app .

docker run -it --rm --name my-running-app my-golang-app

在容器内编译程序

docker run --rm -v "$PWD":/usr/src/myapp -w /usr/src/myapp golang:1.19 go build -v
# compile with Makefile

$ docker run --rm -v "$PWD":/usr/src/myapp -w /usr/src/myapp golang:1.19 make

在容器内交叉编译程序

$ docker run --rm -v "$PWD":/usr/src/myapp -w /usr/src/myapp -e GOOS=windows -e GOARCH=386 golang:1.19 go build -v

$ docker run --rm -it -v "$PWD":/usr/src/myapp -w /usr/src/myapp golang:1.19 bash
$ for GOOS in darwin linux; do
>   for GOARCH in 386 amd64; do
>     export GOOS GOARCH
>     go build -v -o myapp-$GOOS-$GOARCH
>   done
> done

多阶段构建容器(减小体积)

FROM golang:1.19-alpine as builder

RUN apk --no-cache add git && export GOPRIVATE=github.com/xxx/xxx && \
    export GOPROXY=https://goproxy.cn,direct

COPY . /root/build

WORKDIR /root/build

RUN go mod download && go build -o server main.go

FROM alpine:latest as prod

RUN apk --no-cache add ca-certificates

WORKDIR /root/

COPY --from=0 /root/build/server .

CMD ["./server"]

其实还有更多的玩法我这里没有说到，就留待各位大佬自行探索了~~~