dinos80152 / golang-docker-alpine

Building and Deploying Minimize Golang Executable Docker Image with Alpine Linux

golang-docker-alpine

Introduction

A template for deploying a minimize golang binary docker image, which size only about 10 MB.

This example uses Travis CI and Heroku to make a demo.

Docker version higher than 17.05

Use multi-stage builds, the example Dockerfile

Docker version lower than 17.05

Make two docker file

• DockerSrc for building binary
• DockerBin for execution

See the example in old folder

Comparison

Image	Size
source code image	282 MB
binary image	10.5 MB

Warning

Function time.LoadLocation() will panic in binary image, because of

LoadLocation looks in the directory or uncompressed zip file named by the ZONEINFO environment variable, if any, then looks in known installation locations on Unix systems, and finally looks in $GOROOT/lib/time/zoneinfo.zip.

You have to set $GOROOT and copy zoneinfo.zip manually.

Reference

• Use multi-stage builds, docker docs
• Container Registry and Runtime, Heroku Dev Center
• Pushing a Docker Image to a Registry, Travis CI
• Docker Documentation
• LoadLocation, The Go Programming Language