Previously in part 1, we covered containers at a high level, including how they scale, alternatives and properties. Now in this second post we find out what Docker is, how it runs on Linux, and how images work. And we’ll do all this without the usual analogies of containers and ships, but instead with restaurants & food. Sound good? Well, keep reading…

What is Docker?

Docker is the dominant container technology (as of 2018); with around 79% of organisations in a 2017 survey[1] saying Docker is their primary method for running containers.

There is a tendency to conflate Docker with containers and assume they are one and the same. This is not true. Continue reading →