How To Install Private Git Hosted Dependencies Inside Docker Image Using SSH

Introduction

This quick guide will show you how to mount a ssh key inside a container in build time, to allow you to install private dependencies, that won't be persisted in the final image. It uses python but could work with any language/package manager that uses git + ssh.

Dockerfile

First you need to set Dockerfile syntax to docker/dockerfile:1.2. Put this in the beggining of the file:

# syntax = docker/dockerfile:1.2

Now install git and openssh, and setup ssh …

build dependencies devops docker git guide image inside install introduction language manager package python security show ssh work