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Shared storage between virtual instances (feddit.nl)

submitted 3 days ago* (last edited 3 days ago) by hsdkfr734r@feddit.nl to c/selfhosted@lemmy.world

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Hi, right now I'm in the planning process for a self hosted virtualization and containerization environment on one or more Linux hosts. Incus looks promising. And there will be mainly Linux instances. I'm not sure how to solve the shared storage issue - since it is a bad idea to mount a fs more than once. Maybe you have some hints? I'd appreciate that. :)

The OS of an instance can sit on an exclusively used volume, that is solved for me (store it in a local storage pool).

But how should I organize shared read/write storage? It should be accessed by multiple instances at the same time. It should be easily usable as a mount point. Storage replication among multiple hosts is optional - there is rsync. Is NFS still the way to go or are there nicer options? Is there an overlayfs which could resolve concurrent writes?

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[–] SheeEttin@lemmy.zip 1 points 3 days ago (1 children)

What device are you going to put this shared storage on?

[–] hsdkfr734r@feddit.nl 1 points 3 days ago (1 children)

Thanks for asking. I left that detail out. An SSD which is attached to the virtualization host via SATA. I plan to use either a LVM2 volume group or a BTRFS with subvolumes to provide the storage pool to Incus/LXC.

[–] eleitl@lemmy.zip 1 points 3 days ago

Just use NFS then.