Hey,

It's a config option for nova-compute:

https://docs.openstack.org/nova/latest/configuration/config.html#DEFAULT.reserved_host_cpus

Also related ones are regarding ram and disk.

You might also find a good idea to apply a cgroups rule to ensure you _really_ have CPU reserved, like this:

https://gist.github.com/noonedeadpunk/a4e691e64da031084c071b554a5b40cd

чт, 23 мар. 2023 г., 08:48 Nguyễn Hữu Khôi <nguyenhuukhoinw@gmail.com>:

Hello guys.
I am trying google for nova host cpu reserve to prevent host overload but I cannot find any resource about it. Could you give me some information?
Thanks.
Nguyen Huu Khoi