Hacker News new | ask | show | jobs
by jlhawn 4070 days ago
The slides mention that Docker containers have hashes. This is not the case. In fact, it's probably one of the biggest user misunderstandings of Docker. Container IDs and Image IDs are not SHA hashes. Even though it may look like it they are actually just randomly generated 256-bit hex-encoded unique identifiers.

Since the slides also mention that you can use Docker images with a systemd-nspawn/machinectl setup it would be great if they soon supported the v2 Docker Registry and image format which actually does use content-addressable hashes for images.
1 comments
chimeracoder 4070 days ago
> Container IDs and Image IDs are not SHA hashes.

Thanks for catching that - I've updated it.

> Since the slides also mention that you can use Docker images with a systemd-nspawn/machinectl setup it would be great if they soon supported the v2 Docker Registry and image format which actually does use content-addressable hashes for images.

I haven't used the v2 registry, so I don't know if systemd (machinectl) supports this yet, but I imagine they will soon if they don't already.

link