Ancestors

Written by Passerby6497@lemmy.world on 2025-01-05 at 01:58

Is it possible to run a docker host that has no harddrive?

https://lemmy.world/post/23894555

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Written by Scrubbles on 2025-01-05 at 02:11

Kind of, but probably not. I started writing this and was like “totally it could be stateless”. Docker runs stateless, and I believe when it starts it is still stateless (or at least could be mounted on a ramdrive) - but then I started thinking, and what about the images? Have to be downloaded and ran somewhere, and that’s going to eat ram quickly. So I amend to you don’t need it to be stateful, you could have an image like you talked about that is loaded every time (that’s essentially what kubernetes does), but you will still need space somewhere as scratch drive. A place docker will places images and temporary file systems while it’s running.

For state, check out docker’s volume backings here: docs.docker.com/engine/storage/volumes/. You could use nfs to another server as an example for your volumes. Your volumes would never need to be on your “app server”, but instead could be loaded via nfs from your storage server.

This is all nearing into kubernetes territory though. If you’re thinking about netboot and automatically starting containers, and handling stateless volumes and storing volumes in a way that are synced with a storage server… it might be time for kubernetes.

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Written by sugar_in_your_tea@sh.itjust.works on 2025-01-05 at 04:03

Yeah, a PXE boot should work, but you’d need a ton of RAM (I’d double to 32GB for Frigate). Drives are cheap, I’d just get one and not deal with network booting at all.

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Written by Scrubbles on 2025-01-05 at 07:33

Exactly. Hell 50 bucks you can get a decent SSD. Just grab something, have all of your drives hosted via NFS, but then you aren’t hacking docker to run in ram all the time, and wasting your ram hosting stuff it doesn’t need to

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Toot

Written by Passerby6497@lemmy.world on 2025-01-05 at 12:27

Hell 50 bucks you can get a decent SSD.

If only it were that easy, I would have already thrown a spare 2.5" into the system, but it’s only got a single nvme slot for local storage.

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Descendants

Written by sugar_in_your_tea@sh.itjust.works on 2025-01-05 at 14:36

You can get an NVME drive for <$50, in fact I saw a 128GB one online for ~$15 from a reliable brand (Patriot).

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Written by Passerby6497@lemmy.world on 2025-01-05 at 18:32

That’s actually doable. Thanks for that friend.

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