[Question]: How to enable nested virtualization

[mondox22]

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Question

Hi,
I'm trying to install vDSM on Portainer which is installed on an Ubuntu server vm on ProxMox.
I checked with: sudo kvm-ok
and it tells me:

INFO: /dev/kvm exists
KVM acceleration can be used.

However, when I am installing vDSM on Portainer it always tells me: "ERROR: KVM acceleration not available (device file missing), this will cause a major loss of performance."
I checked and "nested virtualization " is enabled so i don't know why this happens.....

Thanks in advance!

[Skyfay]

Did you add /dev/kvm to the container?
I don't know if you are using Docker Compose in Portainer or just created a stand alone container but you have to pass the device /dev/kvm to the container to get kvm work inside the container.

docker-compose

    devices:
      - /dev/kvm

docker-cli
--device=/dev/kvm