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Longhorn overkill for RAID ? (lemmy.world)
submitted 11 months ago by Burn1ngBull3t@lemmy.world to c/selfhosted@lemmy.world
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Hello selfhosted !

Continuing my journey of setup up my home k3s cluster.

I’ve been asking myself if Longhorn might be overkill for my home cluster,here’s what i did:

3 machines running k3s each. One of them has a storage in Raid 5 and I dont want to use any storage from the other two.

Thing is, i had to configure replicas to 1 in longhorn for my pv to be green.

Hence my question, since data is already replicated in the array, shouldn’t I just use a NFS storage class instead?

Thanks !

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[-] Starbuck@lemmy.world 4 points 11 months ago

Longhorn is basically just acting like a fancy NFS mount in this configuration. It’s a really fancy NFS mount that will work well with kubernetes, for things like PVC resizing and snapshots, but longhorn isn’t really stretching its legs in this scenario.

I’d say leave it, because it’s already setup. And someday you might add more (non-RAID) disks to those other nodes, in which case you can set Longhorn to replicas=2 and get some better availability.

[-] Burn1ngBull3t@lemmy.world 1 points 11 months ago

You are completely right.

However in my mind (might be wrong here) if I use another node, i wouldn’t use the RAID array completely.

While setup up i thought that its either:

  • NAS storageClass attached to the RAID array, no longhorn
  • with longhorn when there is no RAID, but replication at 3

In either case, the availability of my data would be quite the same right ?

(Then there is options to backup my PV to s3 with longhorn and all that i would have to setup again though )

Thanks for your answer !

this post was submitted on 02 Dec 2023
11 points (86.7% liked)

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