kvm module not loaded on compute hosts

[Hui Kang]

In kolla, nova compute uses kvm by default. However, chances are KVM module is not loaded on the host. Then launching VM instance will fail and show

"error: no supported architecture for os type 'hvm' notify about instance usage "

A quick fix would be to add a vairlabe like "enable_kvm" in the ansible playbook. If "enable_kvm=yes", load the kernel module in the nova role on the compute hosts.

- Hui

[Hui Kang (huikang27)]

do we need to wait for some core to triage this bug?

[Sam Yaple (s8m)]

This is a regression. In the past we did actually modprobe the kvm module in the nova compute container.

Hui do you want to handle this or would you like me too?

[Hui Kang (huikang27)]

Hi, Sam
I am very glad to take the task. So would like to add this to one of
the ansible nova role?

- Hui

On Wed, Nov 4, 2015 at 6:04 PM, Sam Yaple <email address hidden> wrote:
> This is a regression. In the past we did actually modprobe the kvm
> module in the nova compute container.
>
> Hui do you want to handle this or would you like me too?
>
> ** Changed in: kolla
> Status: New => Triaged
>
> ** Changed in: kolla
> Importance: Undecided => High
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1512788
>
> Title:
> kvm module not loaded on compute hosts
>
> Status in kolla:
> Triaged
>
> Bug description:
> In kolla, nova compute uses kvm by default. However, chances are KVM
> module is not loaded on the host. Then launching VM instance will fail
> and show
>
> "error: no supported architecture for os type 'hvm' notify about
> instance usage "
>
> A quick fix would be to add a vairlabe like "enable_kvm" in the
> ansible playbook. If "enable_kvm=yes", load the kernel module in the
> nova role on the compute hosts.
>
> - Hui
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/kolla/+bug/1512788/+subscriptions

[Hui Kang (huikang27)]

Hi, Sam
I am very glad to take the task.

But I tested run modprode kvm inside nova-compute container; it does not solve the problem.
Only I run "modprobe kvm" on the host, KVM takes effect.

[Hui Kang (huikang27)]

Sam, I think we can ensure kvm module is loaded in the pre-check playbook.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/249446

[OpenStack Infra (hudson-openstack)]

Change abandoned by Christian Berendt (<email address hidden>) on branch: master
Review: https://review.openstack.org/249446
Reason: After 1 year without activity i think it is fine to abandon this change. Please re-open if you want to continue to work on it.