Collection of additional nova scheduler filters developed in the de.NBI project

This match reverses the logik of the existing AggregateInstanceExtraSpecs filter. All specs of a given host/aggregate have to be present in the instance definition for a host to pass. This allows an easy definition of special duty hosts that are only available to well defined instances, e.g. GPU hosts. The existing filter does not prevent normal instances without any extra specs from being scheduled to host or aggregate with certain specs.

Example:

Hosts in the aggregate 'high-mem' should be reserved for instance with high memory requirements. The aggregate is defined with an extra property:

(openstack) aggregate show high-mem
+-------------------+--------------------------------+
| Field             | Value                          |
+-------------------+--------------------------------+
| availability_zone | nova                           |
...
| name              | high-mem                       |
| properties        | type='high-mem'                |
...
+-------------------+--------------------------------+

A corresponding flavor can be created with

(openstack) flavor create --property type=high-mem ...... large_ram_flavor

The filter supports either unscoped property, or properties scoped with aggregate_instance_extra_specs, e.g. aggregate_instance_extra_specs:type=high-mem. All instances based on flavors without a matching property will not be scheduled to the high-mem hosts.

Properties can be defined as key-value pairs or use any of the extra spec ops. For more information see https://docs.openstack.org/nova/rocky/user/filter-scheduler.html.