The OpenStack Block Storage service provides block storage devices to instances using various backends. The Block Storage API and scheduler services run on the controller node and the volume service runs on one or more storage nodes. Storage nodes provide volumes to instances using local block storage devices or SAN/NAS backends with the appropriate drivers. For more information, see the Configuration Reference. This chapter omits the backup manager because it depends on the Object Storage service.

Your OpenStack environment now includes Block Storage. You can launch an instance or add more services to your environment in the following chapters.