this post was submitted on 18 Aug 2024
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Why I need a full isolated container? Can't I just use chroot?
Container is just a term for a set of isolation solutions bundled together.
Like file system isolation (chroot), network isolation, process isolation, device isolation...
One of them is ofc chroot, yes container use exactly the same chroot functionality.
So to answer your question, no, you don't need full isolated container. You can use only chroot.
You just need to pass all required devices ( and match the driver version running in kernel with your files in container and (avoid) more than one app having full unrestricted access to GPU as that would result in issues (but dont know the details so can't help you with that)).
Because you're relying on compatibility between older Debian software (systemd, etc) and newer versions installed in the chroot. Things get weird quickly.
Consider a nested privileged container instead (LXC or similar) and cross your fingers that Debian systemd and Arch systemd play nice.
If the above fails just make a VM and pass through the GPU with GVT-g (otherwise pass through the entire GPU.)
If all of that fails install Arch to a USB attached SSD or something.
What Systemd compatibility I need to run Graphics session?