this post was submitted on 03 Nov 2024
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Virtualization: How do I share a cloud drive mounted inside the guest with the host? (lemmy.ml)
submitted 3 weeks ago* (last edited 2 weeks ago) by [email protected] to c/[email protected]
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Hi everyone! I want to be able to access a folder inside the guest that corresponds to a cloud drive that is mounted inside the guest for security purposes. I have tried setting up a shared filesystem inside Virt-Manager (KVM) with virtiofs (following this tutorial: https://absprog.com/post/qemu-kvm-shared-folder) but as soon as I mount the folder in order for it to be accessible on the ~~guest~~ host the cloud drive gets unmounted. I guess a folder cannot have two mounts at the same time. Aliasing the folder using bind and then sharing the aliased folder with the host doesn't work either. The aliased folder is simply empty on the host.

Does anyone have an idea regarding how I might accomplish this? Is KVM the right choice or would something like docker or podman better suited for this job? Thank you.

Edit: To clarify: The cloud drive is mounted inside a virtual machine for security purposes as the binary is proprietary and I do not want to mount it on the host (bwrap and the like introduce a whole lot of problems, the drive doesn't sync anymore and I have to relogin each time). I do not use the virtual machine per se, I just start it and leave it be.

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[–] [email protected] 1 points 2 weeks ago (1 children)

user_id=0,group_id=0

do you have sudo access and are there any rules in /etc/sudo* that match your username or any of your groups? which distribution?

[–] [email protected] 1 points 2 weeks ago (1 children)

Since originally writing the post I have switched to a rootless podman container. Running it how I did before (inside a VM) would simply yield user_id=1000,group_id=1000 I think.

[–] [email protected] 1 points 2 weeks ago (1 children)

that implies that you're not using the binary anymore since you're in a container; is it using an overlay fs?

[–] [email protected] 1 points 2 weeks ago (1 children)

I am using the binary. Just running it inside a container instead of a VM.

overlay fs?

Yes.

[–] [email protected] 1 points 2 weeks ago (1 children)

so the drive isn't mounted when the container starts; but you execute it after it started and then the drive is mounted?

[–] [email protected] 1 points 2 weeks ago (1 children)

Yes.

[–] [email protected] 1 points 2 weeks ago

i've never seen a workflow like that so i don't think i can help you with the container.

if getting it from the host os an option, then it makes sense to see if it's possible and something like a sudoer rule or selinux could prevent that; my last question was my attempt to ascertain this.