Docker does not exist: processes and reliability
Автор: Backend By Dmytro
Загружено: 2026-01-11
Просмотров: 18
Описание:
Stop believing the magic. We are told that Docker containers are lightweight Virtual Machines, but that is actually a lie.
In this Deep Dive, we deconstruct the Docker architecture to prove that "containers" don't exist—they are just a carefully orchestrated stack of isolated processes.
I will show you what actually happens when you run docker run. We will inspect the process tree to find dockerd, containerd, and the unsung hero of resilience—the containerd-shim. Finally, we will conduct an experiment: killing the Docker daemon in real-time to see if our Nginx application survives.
By the end of this video, you will understand:
Why dockerd is just an API server, not the runtime.
How containerd and runc actually spawn your processes.
The critical role of containerd-shim in keeping your apps alive during updates.
How to enable "Zero Downtime" updates using the live-restore configuration.
The reality of file system isolation (and why Root on host can see everything)
Docker REST API https://docs.docker.com/reference/api...
Containerd gRPC API https://dnephin.github.io/containerd/
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