Docker Captains are select members of the community that are both experts in their field and are passionate about sharing their Docker knowledge with others. “Docker Captains Take 5” is a regular blog series where we get a closer look at our Captains and ask them the same broad set of questions ranging from what their best Docker tip is to whether they prefer cats or dogs (personally, we like whales and turtles over here). Today, we’re interviewing Elton Stoneman who has been a Docker Captain since 2016. He is a Container Consultant and Trainer and is based in Gloucestershire, United Kingdom.

How/when did you first discover Docker?

I was consulting as an API Architect, building out the backend services for a new Android device. My role was all about .NET services running in Azure, but we worked as a single team – and the people working on the operating system were using Docker to simplify their build tools.

I started looking into their setup and I was just stunned at how you could run complex software with a single Docker command – and have it run the same way on any machine. That was way back in 2014, Docker was version 0.7 I think and I created my Docker Hub account in August of that year. Then I started blogging and speaking about Docker, and I’ve never looked back.

What is your favorite Docker command?

docker manifest inspect [image]

Multi-architecture images are hugely powerful. I work with a lot of platforms now but my heart is still in .NET. The latest .NET runtime works on Windows and Linux on Intel and Arm CPUs, and I love how you can target your apps for different infrastructures, using the same source code and a single Dockerfile.

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