Could I set some quota of one hypervisor like memory_mb?
I want to set the hypervisor's memory_mb to smaller than the true value -- 32126, because I need to preserve some resource for the host's system running.
root@l-pc:~# openstack hypervisor show l-pc -c free_ram_mb -c memory_mb -c memory_mb_used -c running_vms
+----------------+-------+
| Field | Value |
+----------------+-------+
| free_ram_mb | 27518 |
| memory_mb | 32126 |
| memory_mb_used | 4608 |
| running_vms | 1 |
+----------------+-------+
root@l-pc:~# free -h
total used free shared buff/cache available
Mem: 31G 9.8G 17G 119M 3.9G 20G
Swap: 14G 0B 14G
I know there is a openstack quota set command can limit the resource for the project, but not for one hypervisor.
root@l-pc:~# openstack hypervisor -h
Command "hypervisor" matches:
hypervisor list
hypervisor show
hypervisor stats show
Is there any method to achieve that like openstack hypervisor set for limit the resource consume in one hypervisor?
You can use "reserved_host_memory_mb" parameter in nova.conf
Any positive integer representing amount of memory in MB to reserve for the host.