VxRack Neutrino Software
When trying to launch a new VM, the below error occurs:
The same error can also be seen in the nova-scheduler.log
libvirtError: internal error: no supported architecture for os type 'hvm'
Further investigation on some cloud compute nodes show the following:
columbus-green:/var/log # grep -ri kvm messages
2016-09-05T12:07:41.267008+00:00 nile-1960-9d9e22d-1053 kernel: [ 15.264562] kvm: disabled by bios
2016-09-05T12:07:41.267036+00:00 nile-1960-9d9e22d-1053 kernel: [ 15.397152] kvm: disabled by bios
2016-09-05T12:08:53.304106+00:00 nile-1960-9d9e22d-1053 kernel: [ 88.977171] kvm: disabled by bios
2016-09-05T12:08:53.356018+00:00 nile-1960-9d9e22d-1053 kernel: [ 89.030927] kvm: disabled by bios
This means the VT extension has been disabled on the node after a BIOS update or a Node restart. This is a random issue and it could happen on any of the nodes.
You can confirm the case be running the below:
lehi-green:~ # syscfg /d biossettings "Intel(R) Virtualization Technology"
Intel(R) Virtualization Technology
Current Value : Disabled
Disabled : 00
Enabled : 01
Please contact Support as they have a workaround they can use.