Uemerson / go-docker-multi-stage

Build a Go app in Docker using multi-stage builds.

About

This repository aims to facilitate the development of a Go application using a Docker image with multi-stage builds, focusing on optimizing the final build size.

Build

To initiate the build process, execute the following command:

$ docker build -t go-docker-multi-stage .

To view the final size of the image, use the following command:

$ docker image ls

Output:

REPOSITORY                      TAG       IMAGE ID       CREATED          SIZE
go-docker-multi-stage           latest    4c42878ab6d2   9 seconds ago    1.89MB
go-docker-without-multi-stage   latest    7ce5c380ce12   39 seconds ago   852MB

Run go-docker-multi-stage image:

$ docker run go-docker-multi-stage

Run go-docker-without-multi-stage image:

$ docker run go-docker-without-multi-stage

Observation

The go-docker-without-multi-stage image does not utilize multi-stage builds. As you can observe, the go-docker-multi-stage variant is approximately 450 times lighter than the go-docker-without-multi-stage version, with the former weighing in at 1.89MB compared to the latter's 852MB.