The Docker Dependency Problem No One Talks About (But Everyone Feels)

Docker is often described as the solution to “it works on my machine.” And to be fair, it really does solve a lot of pain. But after years of using it in real-world systems, I’ve noticed something: Docker doesn’t remove problems—it reshapes them into dependency relationships that are harder to see, debug, and sometimes even understand. 1. “It works on my machine” didn’t disappear—it moved into containers Before Docker: “It works on my machine” meant environment mismatch After Docker: “It works in my container” still doesn’t mean it works in production Now the mismatch becomes: base image differences missing system libraries subtle kernel behavior differences architecture mismatches (amd64 vs arm64 pain is real) We didn’t eliminate inconsistency—we encapsulated it. 2. The hidden dependency chain inside images A Docker image looks clean and self-contained. But inside it: Debian/Alpine/Ubuntu version matters libc version silently affects everything OpenSSL versions break authentication in