Shared storage between virtual instances (feddit.nl)

submitted 10 months ago* (last edited 10 months ago) by hsdkfr734r@feddit.nl to c/selfhosted@lemmy.world

7 comments fedilink hide all child comments

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?

you are viewing a single comment's thread
view the rest of the comments

[-] SheeEttin@lemmy.zip 0 points 10 months ago

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

[-] hsdkfr734r@feddit.nl 0 points 10 months ago

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 0 points 10 months ago

Just use NFS then.

this post was submitted on 25 Jul 2025

1 points (100.0% liked)

Selfhosted

59651 readers

159 users here now

A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.

Rules:

Be civil: we're here to support and learn from one another. Insults won't be tolerated. Flame wars are frowned upon.
No spam posting.
Posts have to be centered around self-hosting. There are other communities for discussing hardware or home computing. If it's not obvious why your post topic revolves around selfhosting, please include details to make it clear.
Don't duplicate the full text of your blog or github here. Just post the link for folks to click.
Submission headline should match the article title (don’t cherry-pick information from the title to fit your agenda).
No trolling.
No low-effort posts. This is subjective and will largely be determined by the community member reports.

Resources:

selfh.st Newsletter and index of selfhosted software and apps
awesome-selfhosted software
awesome-sysadmin resources
Self-Hosted Podcast from Jupiter Broadcasting

Any issues on the community? Report it using the report flag.

Questions? DM the mods!

founded 3 years ago

MODERATORS

HybridSarcasm@lemmy.world

HybridSarcasm@lemmy.hybridsarcasm.xyz