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QubesOS – A reasonably secure operating system

(www.qubes-os.org)
176 points TheFreim | 1 comments | 11 Jul 23 18:11 UTC | HN request time: 0.243s | source
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flashback2199 ◴[11 Jul 23 18:59 UTC] No.36685709[source]▶
I really like QubesOS, but you cannot run VMs inside a qube, or other things that require VMs like Docker Desktop for Linux, because the xen hypervisor does not support nested virtualization.
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Syonyk ◴[11 Jul 23 19:40 UTC] No.36686247[source]▶
You can. It's just neither recommended nor enabled by default.

https://forum.qubes-os.org/t/nested-virtualization/14790

Poke around /etc/libvirt/libxl and your particular VM's config file. You'll find some lines like:

<feature name='vmx' policy='disable'/> <feature name='svm' policy='disable'/>

Enable it, and you should have working nested virtualization.

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1. flashback2199 ◴[11 Jul 23 19:58 UTC] No.36686487[source]▶
I did that very thing about a year ago when I still had QubesOS installed, and it did not work. There seems to be a lot of misinformation about this swirling around the web. It simply does not work. There is a post somewhere that confirms it but I don't have the link. Unless the QubesOS devs/maintainers made a 180 degree turn since I tried it and decided to start compiling QubesOS with xen nested virtualization enabled, but I doubt it because their reason was that xen's nested virtualization feature is basically broken anyway.