Docker

Many of the Rails applications I build these days are deployed as Docker images. Unfortunately, building Docker images usually takes a long time. This article describes how the build process can be accelerated by a factor of 2-3.

Some time ago I wrote about using Portainer for Docker hosting and using GitLab as container registry. Due to the further development of Portainer there is an interesting improvement regarding the installation of updates.

Building a lean Docker image for delivering a single-page JavaScript application is simple. But it is not that easy when it comes to configuring with environment variables.

Building a Docker image for a given Rails application is easy – unless you want the Docker image as small as possible. Docker is awesome, but handling large files is annoying. Read how I have reduced the image size of a Rails application from 1.6GB to 329MB.

An automated build process is essential for software development. After every single change in the source code – no matter how small – the software is completely assembled and tested automatically. In my case, the result is usually a Docker image.

Nothing lasts forever: A few days ago, Docker Inc. announced the end of “Docker Cloud”. This article describes the migration of my single node installation to Portainer – an open-source lightweight management UI for Docker.