[stein][hypervisor] Post successful stein deployment Openstack hypervisor list is empty

roshan anvekar roshananvekar at gmail.com
Fri Feb 5 15:49:06 UTC 2021

Thanks for the reply.

Well, I have a multinode setup ( 3 controllers and multiple compute nodes)
which was initially deployed with rocky and was working fine.

I checked the globals.yml and site.yml files between rocky and stein and I
could not see any significant changes.

Also under Admin-Compute-Hypervisor, I see that all the compute nodes are
showing up under Compute section. the hypervisor section is empty.

I was wondering if controllers are placed under a different aggregate and
not able to show up. I can see all 3 controllers listed in host-aggregates
panel though and are in service up state.

VM creation fails with no valid host found error.

I am not able to point out issue since I don't see any errors in deployment


On Fri, Feb 5, 2021, 7:47 PM Sean Mooney <smooney at redhat.com> wrote:

> On Fri, 2021-02-05 at 14:53 +0530, roshan anvekar wrote:
> > Hi all,
> >
> > Scenario: I have an installation of Openstack stein through
> kolla-ansible.
> > The deployment went fine and all services look good.
> >
> > Although I am seeing that under Admin--> Compute --> Hypervisors panel in
> > horizon, all the controller nodes are missing. It's a blank list.
> did you actully deploy the nova compute agent service to them?
> that view is showing the list of host that are running the nova compute
> service
> typically that is not deployed to the contolers.
> host in the contol group in the kolla multi node inventlry
> https://github.com/openstack/kolla-ansible/blob/master/ansible/inventory/multinode#L3
> are not use to run the compute agent by default
> only nodes in the compute group are
> https://github.com/openstack/kolla-ansible/blob/master/ansible/inventory/multinode#L18
> the eception to that is ironic
> https://github.com/openstack/kolla-ansible/blob/master/ansible/inventory/multinode#L301-L302
> which is deployed to the contolers.
> the nova compute agent used for libvirt is deployed specificlly to the
> compute hosts via the  nova-cell role at least on master
> https://github.com/openstack/kolla-ansible/blob/master/ansible/nova.yml#L118
> this was done a little simpler before adding cell support but the
> inventory side has not changed in many release in this
> regard.
> >
> > Also "Openstack hypervisor list" gives an empty list.
> >
> > I skimmed through the logs and found no error message other than in
> > nova-scheduler that:
> >
> > *Got no allocation candidates from the Placement API. This could be due
> to
> > insufficient resources or a temporary occurence as compute nodes start
> up.*
> >
> > Subsequently I checked placement container logs and found no error
> message
> > or anamoly.
> >
> > Not sure what the issue is. Any help in the above case would be
> appreciated.
> >
> > Regards,
> > Roshan
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