Docker Orchestration

Running single container applications

Before we get into the nuts and bolts of Docker orchestration, let's run through the basics of running single applications in Docker. Seeing as this is a tech book, the first example is always some variant of Hello World and this is no different.

Note

By default, docker must be run as the root user or with sudo. Instead, you could add your user to the docker group and run containers without root.

$ docker run --rm ubuntu echo "Hello World"

This example is really simple. It downloads the ubuntu Docker image and uses that image to run the echo "Hello World" command. Simple, right? There is actually a lot going on here that you need to understand before you get into orchestration.

First of all, notice the word ...