this post was submitted on 24 Aug 2024
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Should I keep shared or separate k8s clusters? (eviltoast.org)
submitted 2 months ago by johntash@eviltoast.org to c/selfhosted@lemmy.world
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I've been in the process of migrating a lot things back to kubernetes, and I'm debating whether I should have separate private and public clusters.

Some stuff I'll keep out of kubernetes and leave in separate vms, like nextcloud/immich/etc. Basically anything I think would be more likely to have sensitive data in it.

I also have a few public-facing things like public websites, a matrix server, etc.

Right now I'm solving this by having two separate ingress controllers in one cluster - one for private stuff only available over a vpn, and one only available over public ips.

The main concern I'd have is reducing the blast radius if something gets compromised. But I also don't know if I really want to maintain multiple personal clusters. I am using Omni+Talos for kubernetes, so it's not too difficult to maintain two clusters. It would be more inefficient as far as resources go since some of the nodes are baremetal servers and others are only vms. I wouldn't be able to share a large baremetal server anymore, unless I split it into vms.

What are y'all's opinions on whether to keep everything in one cluster or not?

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[–] wirehead@lemmy.world 3 points 2 months ago (1 children)

Well, one option, which can be pushing the boundaries of selfhosted for some, would be to use a hosted k8s service for your public-facing stuff and then a home real k8s cluster for the rest of it.

[–] johntash@eviltoast.org 1 points 2 months ago

This is an option, my main reason for not wanting to use a hosted k8s service is cost. I already have the hardware, so I'd rather use it first if possible.

Though I have been thinking of converting some sites to be statically-generated and hosted externally.