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only emulated cpus are available performance will be significantly limited

asked 2017-02-15 05:04:36 -0500

gkarthiraja gravatar image

When trying to launch instance getting error has Can't create instance, no valid host was found.

After verifying virt-host-validate command getting error as " only emulated cpus are available performance will be significantly limited"

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answered 2017-02-15 15:07:21 -0500

volenbovsky gravatar image

Hi,

-'only emulated cpus are available performance will be significantly limited' is caused by fact that virtualization such as VT-x is not enabled in BIOS (or you are running your Compute Host in VM, but that's less likely). So you are not using KVM, while nova.conf contains 'kvm' as virt_type most probably. So options are - to enable VT-x or, that's worse, change to QEMU as virt_type

That is likely causing ''no valid host host found' .

But note that this error has a number of reasons. To check what are those - check logs for nova-scheduler on controller, nova compute on Compute Hosts and possibly Neutron logs. Turn on debug in Nova in case not clear.

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Asked: 2017-02-15 05:04:36 -0500

Seen: 1,270 times

Last updated: Feb 15 '17