Nested RHEV-H 3.x and VMware ESXi 5.5

I was trying to setup a RHEV laboratory in my ESXi but I wasn’t unable to approve my host.

In RHEVM appeared an error in the GUI like this one (check your Events tab):

Command returned failure code 1 during SSH session '[email protected]'

But in RHEVM logs there was another latent issue, checking /var/log/ovirt-engine/engine.log :

2014-04-27 12:17:20,814 ERROR [org.ovirt.engine.core.bll.InstallerMessages] (VdsDeploy) Installation x.x.x.x: Failed to execute stage 'Setup validation': Hardware does not support virtualization
2014-04-27 12:18:48,555 ERROR [org.ovirt.engine.core.bll.InstallVdsCommand] (pool-4-thread-49) [1c11a8d3] Host installation failed for host 4eba0c68-4370-4223-8271-831cccf3a64e, x.x.x.x.: Command returned failure code 1 during SSH session '[email protected]'

So in order to enables nested virtualization of RHEV-H in VMware ESXi 5.5u1 we have to add 2 new values in our vmx file:

featMask.vm.hv.capable = "Min:1"
vhv.enable = "TRUE"

After adding them I was able to approve the host without any further issues.

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