I think it’s the lightweight nature of Docker combined with the workflow. It’s fast, easy to USE and a DEVELOPER-centric DevOps-ish tool. Its mission is basically: make it easy to package and ship code. DEVELOPERS want tools that abstract away a lot of the details of that process. They just want to see their code working. That leads to all sorts of conflicts with SYS Admins when code is shipped around and turns out not to work somewhere other than the developer’s environment. Docker turns to work around that by making your code as portable as possible and making that portability USER friendly and simple.

I think it’s the lightweight nature of Docker combined with the workflow. It’s fast, easy to use and a developer-centric DevOps-ish tool. Its mission is basically: make it easy to package and ship code. Developers want tools that abstract away a lot of the details of that process. They just want to see their code working. That leads to all sorts of conflicts with Sys Admins when code is shipped around and turns out not to work somewhere other than the developer’s environment. Docker turns to work around that by making your code as portable as possible and making that portability user friendly and simple.