On 22/04/2025 12:51, Maksim Malchuk wrote:
Hi Michael,
You always can override configuration: https://docs.openstack.org/kolla-ansible/latest/admin/advanced-configuration...
On Tue, Apr 22, 2025 at 2:27 PM Michael Knox <michael@knox.net.nz> wrote:
Hey Folks,
Is it possible to use "cache=none" and "io=native" values with a kolla-ansible deployed cloud that uses a Ceph backend?
cache=none is possible ceph in nova is condiered a network sotrage backend https://docs.openstack.org/nova/latest/configuration/config.html#libvirt.dis... ``` [libvirt] disk_cachemodes=file=writeback,block=none,network=none ``` i think io=native is the only value we supprot. we dont actully set that in nova as far as i recall and i think that is libvirts default
Looks like that it's hard coded to use writeback for caching when the Nova backend is rbd. No globals.yaml overrides.
https://github.com/openstack/kolla-ansible/blob/8d6b5de4c19681dd6cbec45d8031...
Cheers Michael
-- Regards, Maksim Malchuk