如何为开发和生产使用相同的dockerfile [英] How to use the same dockerfile for dev and prod

问题描述

我有2个Dockerfile，1个用于dev，1个用于prod：

I have 2 Dockerfile, 1 for dev, and 1 for prod:

PROD：

FROM golang AS builder
WORKDIR /go/src/gitlab.com/company/project
COPY . .
RUN go build -o ./release/api .

FROM scratch
EXPOSE 9999
COPY --from=builder /go/src/gitlab.com/company/project/release/api .
CMD ["./api"]

和DEV：

FROM golang
WORKDIR /go/src/gitlab.com/company/PROJECT
COPY . .
RUN go build -o ./release/api .
CMD ["./release/api"]

我想将两者合并维护2个Dockerfile是一个单一的坏习惯

I would like to merge those two into a single one, as maintaining 2 Dockerfile is a bad practice

主要区别在于，在dev中，我处理的是 golang 图像，这很实用，而在产品中，我使用的是 scratch 图像，它减少了我的二进制文件的大小。

The main difference is that in dev, I work on golang image, which is practical, and in prod, I work with scratch image, which reduce a lot the size of my binary.

似乎我可以使用Dockerfile中的多个阶段，并在构建时指定阶段名称：

It seems that I can use multiple stages in a Dockerfile, and specify stage name at build time:

docker build . --target=builder

但是如果我这样做，我将不知道如何有条件地运行我的第一阶段的应用程序= [如果我是开发人员，请在第一阶段运行该应用程序，否则，在第二阶段运行该应用程序]

But If I do this, I don't know how to conditionnaly run my app in the first stage = [ If I am in dev, run the app in the first stage, otherwise, run the app in the second stage]

我该怎么办

推荐答案

怎么办？我没有测试它，也没有深入思考您的示例，但是也许在您需要的地方/可以帮助您找到最终的解决方案？

What about something like this? I didn't test it and didn't think through your example deeply, but maybe is somewhere close to what you need/helps you finding out the final solution?

FROM golang:alpine AS base
WORKDIR /go/src/gitlab.com/company/project
COPY . .
RUN go build -o ./release/api .

FROM base AS dev
CMD ["./release/api"]

FROM scratch AS prod
EXPOSE 9999
COPY --from=base /go/src/gitlab.com/company/project/release/api .
CMD ["./api"]

取决于目标<$中指定的值c $ c> docker build --target = prod 或 docker build --target = dev ，将生成其他图像。

Depending on the value specified in target docker build --target=prod or docker build --target=dev, a different image will get built.

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