Hi Oliver,

Here’s a link to the template we’re using - https://opendev.org/openstack/kolla-ansible/src/commit/e628cbddb19fa26de7a5f1d1b0027c0bc70dab38/ansible/roles/nova-cell/templates/nova.conf.j2#L15

As you can see we’re setting ram_allocation_ratio to 1.0 by default, but we do not set cpu or disk allocation ratios - so the defaults there come from Nova itself.

Check (and change 2024.2 to your OpenStack release):

- https://docs.openstack.org/nova/2024.2/configuration/config.html#DEFAULT.initial_cpu_allocation_ratio

- https://docs.openstack.org/nova/2024.2/configuration/config.html#DEFAULT.cpu_allocation_ratio

- https://docs.openstack.org/nova/2024.2/configuration/config.html#DEFAULT.initial_disk_allocation_ratio

- https://docs.openstack.org/nova/2024.2/configuration/config.html#DEFAULT.disk_allocation_ratio

Hope that helps,

Michal

On 12 Dec 2024, at 10:34, Oliver Weinmann <oliver.weinmann@me.com> wrote:

Hi all,
what are the default values for:
cpu_allocation_ratio
ram_allocation_ratio
disk_allocation_ratio
when using kolla-ansible?
I can't seem to find any clear statement about it.
Currently I assume they are 1.0 for each.
Cheers,
Oliver