Multi-stage builds for PHP images

Fri, 07 Jul 2017 18:35:00 +0300

720 MB. That was our production PHP image, and most of it was composer, git, unzip, build headers and a pile of apt cache. None of it runs in production. It was there because composer install needs it, and a Dockerfile was one linear script. People worked around this with two Dockerfiles and a shell script gluing them. Ugly, and everyone’s glue was different.

Docker 17.05 brought multi-stage builds. The first Docker feature in a while that fixes a problem I actually had. Now it is one file:

Docker instead of a setup README

Wed, 13 Apr 2016 21:50:00 +0300

Two days. That is how long the new colleague spent last month getting one project to run on his laptop. The README is two pages: PHP with a specific set of extensions, Nginx, MySQL, Redis, and a paragraph that starts with “on OS X it is a bit different”. Every laptop in the team is a slightly different snowflake.

So I finally tried Docker for local development. The compose file:

Docker on Murat Useinov

Multi-stage builds for PHP images

Docker instead of a setup README