Nova scheduler supports the configuring filters for individual host aggregates, and each host aggregate is configured with filters that are applied only when instances are to be scheduled within that host aggregate.
The host aggregate filters are enabled in the
/etc/nova/nova.conf configuration file, the specific settings can be done for each host aggregate, and settings are set as metadata assigned to the host aggregate. When a filter is not set or the metadata value is not found for the host aggregate, the filter falls back to the default global value set in
Proceed with the following steps to configure Nova host aggregates filters:
AggregateCoreFilter limits the scheduling of virtual machine instances on hosts that have sufficient CPU core available.
AggregateCoreFilter allows the configuration of a fixed amount of vCPU overcommitment for each host aggregate, by setting the aggregate with the metadata key...