Nested Virtualisation

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Nested Virtualisation

With nested virtualisation you can install another Hyper-V or Proxmox server inside a virtual machine to run additional virtual machines. To use this in Proxmox, KVM_Intel must first be enabled: Check if the kernel module is not loaded:

cat /sys/module/kvm_intel/parameters/nested

Now activate the module For Intel CPU:

echo "options kvm-intel nested=Y" > /etc/modprobe.d/kvm-intel.conf


echo "options kvm-amd nested=1" > /etc/modprobe.d/kvm-amd.conf

Restart the server

Activate the kernel module

modprobe -r kvm_intel
modprobe kvm_intel

Check if the kernel module is loaded and returns Y:

cat /sys/module/kvm_intel/parameters/nested

Set the CPU of the virtual machine to HOST Intel:

args: -cpu host


args: -cpu host,+svm

Now install Proxmox on the virtual machine and check if the hardware virtualisation is loaded:

egrep '(vmx|svm)' --color=always /proc/cpuinfo


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