| Re: OverlayFS (was Re: CUDA support inside containers) [message #52653 is a reply to message #52648] |
Mon, 21 November 2016 16:11   |
khorenko
Messages: 533
Registered: January 2006
Location: Moscow, Russia
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Senior Member |
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abufrejoval wrote on Mon, 21 November 2016 15:18I guess OverlayFS is what I need to selectively replicate /proc and /sys contents from the host to make the CUDA runtime happy.
I remember reading about it on lwn.net and it looks like it's actually been backported from 3.18 to RHEL/CentOS/(OpenVZ?)7 3.10 kernels to support Docker, but it seems it's kernel only and missing support from the userland tools ("mount: unknown file system type 'overlayfs'...").
It's quite maddenning, because device access to /dev/nvidia* from inside the container in general seems to be supported in OpenVZ: I get a 'proper' "invalid argument" when doing a 'cat /dev/nvidia-uvm' and not the dreaded "permission denied" I get from LXC on the native CentOS.
You can use overlayfs inside a Virtuozzo 7/OpenVZ 7 Container, all you need is to load the appropriate kernel module on the host.
Did you try to get further with mounting /proc/modules inside a Container with the file with content from the host's /proc/modules?
If your problem is solved - please, report it!
It's even more important than reporting the problem itself...
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