Host aggregate is a group of hosts that share common resources or possess same attributes like hardware configuration.
You can create efficient and scalable resource tiers using OpenStack host aggregates.
You can do the following with host aggregates.
- Create virtual clusters or tiers of resources by grouping together one or more hypervisors by using simple key-value pair tagging.
- Utilize the tiers across different tenants, to restrict placement of specific groups of virtual machines solely to the tier that is applicable to them.
For example, a solid state drive (SSD) tier can be created to ensure that all production workloads get efficient and fast storage I/O access. Similarly, a production tier and development-test tier strategy can be used to separate your workloads.