disable nova action does not work with two numa nodes

[Anna Savchenko]

ubuntu@ubuntu-infra-10-01:~$ juju run-action nova-compute/4 disable --wait
unit-nova-compute-4:
  UnitId: nova-compute/4
  id: "1805"
  message: 'Action disable failed: While reading from ''/etc/nova/nova.conf'' [line
    43]: option ''reserved_huge_pages'' in section ''DEFAULT'' already exists'
  results: {}
  status: failed
  timing:
    completed: 2023-11-09 13:13:06 +0000 UTC
    enqueued: 2023-11-09 13:13:02 +0000 UTC
    started: 2023-11-09 13:13:02 +0000 UTC

reserved_huge_pages = node:0,size:1GB,count:4
reserved_huge_pages = node:1,size:1GB,count:4

Juju: 2.9.43
Openstack: yoga
Nova-compute charm: rev_664

[Felipe Reyes (freyes)]

Hi Anna, thanks for filing this bug, can you provide us the output of "juju config nova-compute reserved-huge-pages" ?

[Felipe Reyes (freyes)]

According to this documentation - https://docs.openstack.org/nova/latest/configuration/config.html#DEFAULT.reserved_huge_pages - the charm is configuring the reserved_huge_pages key correctly

[Felipe Reyes (freyes)]

The root cause is that cloud_utils is using Python's stock configparser to parse nova.conf as an ini file, although openstack's file formats are not standard ini files, cloud_utils should be using oslo_config .

https://opendev.org/openstack/charm-nova-compute/src/branch/master/lib/nova_compute/cloud_utils.py#L35

[Anna Savchenko (annsavchenko)]

Hey Felipe

$ juju config nova-compute reserved-huge-pages
node:0,size:1GB,count:4;node:1,size:1GB,count:4

[Anna Savchenko (annsavchenko)]

Thanks for looking into this!

[Felipe Reyes (freyes)]

Is this bug a high priority issue for the testing that SQA does?

On Wed, 2023-12-06 at 08:54 +0000, Anna Savchenko wrote:
> Hey Felipe
>
> $ juju config nova-compute reserved-huge-pages
> node:0,size:1GB,count:4;node:1,size:1GB,count:4
>

[Anna Savchenko (annsavchenko)]

Hi Felipe, this bug was detected by one of our customers when they tried to scale in during the acceptance testing.

[Bogdan Suchok (bogdan-sk)]

Hi Felipe! Yes, this is of priority, as it affects the customer live environment. Would you be able to suggest when this is going to be fixed?

[Felipe Reyes (freyes)]

On Tue, 2024-01-09 at 17:18 +0000, Bogdan Suchok wrote:
> Hi Felipe! Yes, this is of priority, as it affects the customer live
> environment. Would you be able to suggest when this is going to be
> fixed?
>

Hi Bogdan, as I discussed earlier with Anna offline, this is not in our queue to get a fix any time
soon, if this is blocking a FE deployment (or the validation of it), it would be appropriate to use
the one if the field-* tags, so we can treat it with the priority it needs.