After upgrade to 5.3, nested virtualization on the windows 16 server does not work

Discussion in 'Proxmox VE: Installation and configuration' started by sergbt, Dec 7, 2018.

  1. sergbt

    sergbt New Member

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    How to fix?
     
  2. sdet00

    sdet00 New Member

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    I'm also having issues with nested virtualization. I am using Proxmox 5.3-5, and I'm currently getting the following error when trying to run Proxmox under a hypervisor:

    TASK ERROR: KVM virtualisation configured, but not available. Either disable in VM configuration or enable in BIOS.

    Any ideas? I like to run Proxmox in a test environment before making changes. I can do it on bare metal I suppose, but it's just a hassle. My CPU is an Intel Core i5 4570, which should be OK in theory.
     
  3. dcsapak

    dcsapak Proxmox Staff Member
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    did you try to set the machine type to an older version ? e.g. pc-i440fx-2.11

    then your hypervisor does not expose the kvm feature to proxmox
     
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  4. sdet00

    sdet00 New Member

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    Sorry should have been more clear, I'm trying to run Proxmox within Proxmox. But you are right. I thought I had toggled the flag to enable nested virtualization, but when I went to check with the command "cat /sys/module/kvm_intel/parameters/nested" it returned N. I ran "echo "options kvm-intel nested=Y" > /etc/modprobe.d/kvm-intel.conf" and rebooted and everything started working. Thanks!
     
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