Open Stack

The hypervisor list in Horizon should show all hypervisors,
indifferently of which aggregate they belong to.

I am thinking your issue could be related to cell configuration. On
one of your Nova controller, drop into a nova_api container and use
nova-manage to inspect the cell configuration:

$ docker exec -it nova_api bash
(nova-api)[nova at controller0 /]$ nova-manage cell_v2
usage: nova-manage cell_v2 [-h]


{create_cell,delete_cell,delete_host,discover_hosts,list_cells,list_hosts,map_cell0,map_cell_and_hosts,map_instances,simple_cell_setup,update_cell,verify_instance}
                           ...
nova-manage cell_v2: error: too few arguments
(nova-api)[nova at controller0 /]$ nova-manage cell_v2 list_cells
[...]
(nova-api)[nova at controller0 /]$ nova-manage cell_v2 list_hosts
[...]

Does the last command show your hypervisors?

On Fri, 5 Feb 2021 at 16:50, roshan anvekar <roshananvekar at gmail.com> wrote:
>
> 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 too.
>
> Regards,
> Roshan
>
>
>
>
>
> 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
>>
>>
>>