2 posts tagged with "Runtimes"

Container images get all the attention, but the thing a low-level runtime actually consumes is not an image. It is a bundle: a directory on disk containing an extracted root filesystem and a single JSON file. Understanding that file is the clearest possible explanation of what a container is.

"Kubernetes removed Docker support" caused a lot of confusion in 2021, and the confusion persists because most people never had a reason to learn what sits underneath docker run. The stack is layered, each layer has a specification, and once you see the boundaries the whole thing is straightforward.