Docker Captain Take 5 — Julien Maitrehenry

December 8, 2025 · 448 words · 3 min

I don’t remember how, but, back in 2014, I was working in a PHP shop, and we had our dev environment

I don’t remember how, but, back in 2014, I was working in a PHP shop, and we had our dev environment running inside a VM (with Vagrant). But, it wasn’t really easy to share and maintain. So, we started experimenting with Docker for our dev env. After that, I learned about (legacy/classic) Swarm in Docker, and these tools resolved some of my issues in production for handling load balancer reconfiguration, deployment, and new version management. Check out my first conference about Docker . Since then, I continue to learn, use, and share about Docker. It’s useful in so many use cases — it’s amazing! . I still need to check the documentation sometimes! But also, when I need more space on Docker Desktop, I’ll choose ! If your team uses ARM (Apple M1, for example) and intel CPU and you want to share a docker image with your team, build a cross platform image: Back during the 2018 Dockercon, I was impressed by the usage of Docker for the DART (Double Asteroid Redirection Test) project. A project as easy as building an aircraft, hitting an asteroid with it, and saving the world! You should check how they use Docker for space hardware emulation and testing — it’s brilliant to see how Docker could be used to help save the world: Being a mentor for a developer school in Quebec (42 Quebec). It’s amazing to see the new generation of developers and help them with all their questions, fears, and concerns! And it’s cool when someone calls you “Mister Docker” because he watches a docker conference I gave to answer questions about usage and more. After Docker Extension and SBOM? It’s really hard to say. I need more time to explore and create my first extension, but, I’m sure the Docker team will find something. Give my first conference in English as I always give them in French. I’d also like to update my blog with more content. The French community room. It was a pleasure to engage with Aurélie and Rachid and have so many great speakers with us! I would do it again anytime! 7 years from now, I still think Docker will continue to innovate and find new ways to simplify the life of the developer community! Using a face mask and forgetting about it! Or traveling between different countries during the pandemic with all different kinds of restrictions and rules. Cats! I’m sorry, but a dog requires too much time, and I already have 3 young kids. Salty or Umami Mountains! 🤣 or 😄