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Baby_docker

Created by: oggythebuilder01
1 devlog
2h 54m 18s

When people use Docker, they often think it's a "lightweight virtual machine." Baby Docker proves that a container is actually just a normal folder on your computer that has been "tricked" by the Linux Kernel into thinking it is an entire operatin…

When people use Docker, they often think it’s a “lightweight virtual machine.” Baby Docker proves that a container is actually just a normal folder on your computer that has been “tricked” by the Linux Kernel into thinking it is an entire operating system.

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oggythebuilder01
oggythebuilder01 worked on Baby_docker
about 1 month ago
2h 54m logged

I’ve been using Docker for a while now. I type docker run, and a minute later, I have a database or a web server running. But honestly? It felt like magic. I hate magic in engineering. Magic means I don’t understand the underlying system.

I decided to stop treating containers like lightweight VMs and actually look under the hood. I learned that “containers” aren’t a real physical object in the Linux kernel—they are just a combination of normal Linux features like Namespaces, Cgroups, and Chroot working together to lie to a process.

My goal for this weekend was simple: Write a script that creates a container manually, without installing Docker, to prove that it’s just a process in a fancy costume.

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