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How to run Nested RHEV Hypervisor on ESXi?

07.17.2013 by William Lam // 6 Comments

I have written a number of articles about VMware Nested Virtualization and even today, I am still surprised at how easy it is to virtualize not only our own hypervisor but other vendor's hypervisors as well. This week I received an interesting question from my old Technical Marketing colleague Rawlinson Rivera who wanted to run a nested RHEV (Red Hat Enterprise Virtualization) Hypervisor on ESXi. This was not something I had done before nor had any interest in doing and I told Rawlinson that it should technically work as long as the guestOS is enabled with VHV.

Rawlinson's attempt at installing RHEV resulted in the VM hanging after boot up. After a bit of research, it turns out some additional tweaks are required to get RHEV running on ESXi. I would like to give a huge thanks to Jim Mattson, one of the VMware developers who help made Nested Virtualization possible, for his assistance.

Disclaimer: This is not officially supported by VMware. Please use at your own risk.

Here are the instructions on creating a virtual machine that can be used to install RHEV (make sure you follow these exact steps, the VM must be created with these settings or it will not work):

Step 1 - Download RHEV 6.3 or 6.4 from Red Hat's website

Step 2 - Create a new Virtual Machine (vHW9) and when you get to the OS selection, you will need to select the following:

Guest Family - Other
Guest Version - Other (64-bit)

Step 3 - When you get to the virtual hardware customization, make sure you select LSI Logic SAS for the SCSI controller and also enable VHV under the CPU option.

Step 4 - Finally, you will need to add the following two advanced virtual machine settings:
vcpu.hotadd = false
apic.xapic.enable = false

Step 5 - Mount the RHEV ISO and once the VM starts to boot up, when you are presented with install/upgrade options, hit the TAB key. This will allow you to change the boot parameters and you will need to move your cursor to the left and remove "quiet" from the command-line which is right after the install keyword and then hit enter.

Note: This is required due to a known issue from Red Hat.

Step 6 - If everything was successful, you should be prompted with RHEV installer:

Step 7 - Once the installer has completed and you reboot, you now have nested RHEV running on ESXi!

Now it is time to delete the VM 😉

Categories // Uncategorized Tags // apic.xapic.enable, ESXi, nested, red hat, rhev, vSphere

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William is Distinguished Platform Engineering Architect in the VMware Cloud Foundation (VCF) Division at Broadcom. His primary focus is helping customers and partners build, run and operate a modern Private Cloud using the VMware Cloud Foundation (VCF) platform.

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