INFO: Your CPU does not support KVM extensions

[rcd]

I am trying to run Windows in a Docker container on a Proxmox VM, but getting the error Error response from daemon: error gathering device information while adding custom device "/dev/kvm": no such file or directory

Checking cpu-checker in the VM gives this error

$ sudo kvm-ok
INFO: Your CPU does not support KVM extensions
KVM acceleration can NOT be used

But all is fine in the host

$ sudo kvm-ok
INFO: /dev/kvm exists
KVM acceleration can be used

It is an AMD server, but given there seems to be no problems on the hosts, I suppose it's neither a CPU or BIOS problem? Do I need to configure something in Proxmox to give the client these privileges?

Host CPU is AMD Ryzen 5 5600G with Radeon Graphics
Virtualization: AMD-V
AMD-Vi: AMD IOMMUv2 loaded and initialized

KVM hardware virtualization is enabled for the VM
VM CPU is x86-64-v2-AES with default settings

 

[_gabriel]

nested virtualization need "host" as VM CPU.
btw, why Windows over Docker over a Proxmox VM ?!

 

[rcd]

nested virtualization need "host" as VM CPU.
btw, why Windows over Docker over a Proxmox VM ?!

That did the trick, thanks!

Why not? I'm sure windows in a docker container could come in handy.

 

[_gabriel]

it will be slow as it's a nested virtualization.
I hope it's just for testing & learning.
Because Windows as Proxmox VM is the way.

 

[rcd]

Yeah I guess you're right. Anyway, it was just to try it out. It's pretty cool what you can do in Docker though.