Occasionally I get some really weird errors when I try to install gems using gem or bundler. It took me some time to find out the reason for this. Read on if you’d like to hear the full story.
Recently I faced a rather strange issue with networking and docker: I was neither able to install Rubygems in a container nor access any other services on external IP addresses. In this article I’m going to describe how I solved this issue and what I learned about systemd-networkd.
