Nested Virtualization needed for OpenSource projects (VT-x is not available (VERR_VMX_NO_VMX))

jonashackt's Avatar


24 Feb, 2020 10:36 AM

Hi there, I'am thinking about helping out the Ansible Molecule team to create some CI test jobs for the project, which is part of the great Molecule project. I already created an example project to show the general possibilty to run Vagrant/VirtualBox on AppVeyor, which I didn't got to work back in late 2018. Now I wanted to catch up again (after reading through some newer posts like, where the new Windows Server 2019 images are mentioned) and was hoping to finally get it runnin. But sadly, I ended up with the same error like back in 2018:

VT-x is not available (VERR_VMX_NO_VMX) (see this build log for details:

Is there a way to get a nested hypervisor enabled build machine for and later for also? Would be really cool! I would also like to write some blog posts about that, since AppVeyor is the only free Cloud CI, where such thing could be possible :) (see

  1. 1 Posted by jonashackt on 24 Feb, 2020 10:47 AM

    jonashackt's Avatar

    I also tried to use the Windows Server 2019 image (see build but ended up with the error

    Build worker image not found: Windows Server 2019

    so I guessed, I need to send an email to the appveyor support for the activation of this image for my account. Maybe using the Windows Server 2019 has nested virtualization enabled (just guessing from!

    Oh, and since my account is somehow blocked right now (see, it would be great to have my account unblocked bevor. The account was just created, since the other one didn't work anymore.

  2. Support Staff 2 Posted by Feodor Fitsner on 24 Feb, 2020 05:58 PM

    Feodor Fitsner's Avatar

    Hi Jonas,

    Thank you for using AppVeyor!

    Right now Visual Studio 2019 image is the one based on Windows Server 2019 OS with nested virtualization enabled. It has Hyper-V components installed as well. This image is available to all AppVeyor users without request.

    We've unlocked your account - it should be fine now. So, please give that image a try and let us know if there are any issues.

    And, of course, a blog post will be super helpful! :) Thank you for your support!

  3. Feodor Fitsner closed this discussion on 25 Apr, 2020 09:02 PM.

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