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Virtualization: How do I share a cloud drive mounted inside the guest with the host? (lemmy.ml)

submitted 1 day ago* (last edited 1 day 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 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 1 day ago (1 children)

do you have to provide a username/password or token when you try to access the drive now?

I do but it's through the proprietary GUI of the binary which has no CLI or API I can use.

[–] [email protected] 1 points 1 day ago (1 children)

then strace might help if we're lucky enough to get something like memory addresses.

strace can be very verbose and requires a lot of knowledge that i doubt i can share through comments back and forth.

is creating an intermediary like others have commented on in this post an option? they're automatically easier and faster than strace and there's no gaurantee that strace will show us the information we need.

[–] [email protected] 1 points 4 hours ago (1 children)

strace can be very verbose and requires a lot of knowledge that i doubt i can share through comments back and forth.

No worries. Thank a lot nonetheless.

is creating an intermediary like others have commented on in this post an option?

What do you mean by intermediary? Do you mean syncing the files with the VM and then sharing the synced copy with the host?That wouldn't work since my drive is smaller than the cloud drive and I need all the files on-demand.

[–] [email protected] 2 points 4 hours ago (1 children)

What do you mean by intermediary? Do you mean syncing the files with the VM and then sharing the synced copy with the host?That wouldn’t work since my drive is smaller than the cloud drive and I need all the files on-demand.

that's one way. do you need them all at the same time? are they mostly the same size and type?

[–] [email protected] 1 points 4 hours ago (1 children)

do you need them all at the same time?

I need to access all files conveniently and transparently depending on what I need at work in that particular moment.

are they mostly the same size and type?

Hard no.

[–] [email protected] 1 points 4 hours ago

sshfs might work if your fuse drive is mounted with options that will let it be shared and you have sudo access to enable sshfs. also ssh access is a requirement.

how is it mounted now? it should also be in that same mount printout and usually at the end of the line inside parenthesis.