Configuring Nova scheduler filters

First, let's configure Nova scheduler filters, they are configured in Nova's main configuration file /etc/nova/nova.conf on the host running a Nova scheduler service, which is most commonly installed on the controller node.

Getting ready

Enable and set the filter scheduler driver under the DEFAULT section:

[root@controller ~]# openstack-config --set /etc/nova/nova.conf DEFAULT scheduler_driver

nova.scheduler.filter_scheduler.FilterScheduler

Then, set which filter scheduler should be available:

[root@controller ~]# openstack-config --set /etc/nova/nova.conf DEFAULT scheduler_available_filters
nova.scheduler.filters.all_filters

The parameter scheduler_default_filters will enable filters to be used:

[root@controller ~]# openstack-config --set /etc/nova/nova.conf DEFAULT scheduler_default_filters RetryFilter, AvailabilityZoneFilter, RamFilter, ComputeFilter, ComputeCapabilitiesFilter, ImagePropertiesFilter, CoreFilter

Note that scheduler_default_filters allows...