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Is it possible to run a docker host that has no harddrive? (lemmy.world)
submitted 2 years ago* (last edited 2 years ago) by Passerby6497@lemmy.world to c/selfhosted@lemmy.world
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So I had a micro PC that was running one of my core services and it only supports NVMe drives. Unfortunately, this little guy cooked itself and I'm not in a position to replace the drive. The system is still good and is fairly powerful, so I want to be able to reuse it.

I'm thinking I want to set up some kind of netboot appliance on another server to be able to allow me to boot the system without ever having a local disk. One thing I want to is run some docker images (specifically Frigate) but i wont be able to write anything to persistent storage locally. NFS shares are common in my setup.

Is it even possible to make a 'gold image' of a docker host and have it netboot? I expect that memory limitations (16GB) will be my main issue, but I'm just trying to think of how to bring this system back into use. I have two NAS appliances that I can use for backend long term storage (where I keep my docker files and non-database files anyway), so it shouldn't be too difficult to have some kind of easily editable storage solution. I don't want to use USB drives as persistent storage due to lifespan concerns from using them in production environments.

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[–] sugar_in_your_tea@sh.itjust.works 1 points 2 years ago (1 children)

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.

[–] scrubbles@poptalk.scrubbles.tech 3 points 2 years ago (1 children)

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

[–] Passerby6497@lemmy.world 1 points 2 years ago (1 children)

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.

[–] sugar_in_your_tea@sh.itjust.works 2 points 2 years ago (1 children)

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

[–] Passerby6497@lemmy.world 1 points 2 years ago

That's actually doable. Thanks for that friend.