This chapter covers 10% of the Certified OpenStack Administrator exam requirements.
Architecture and Components of Cinder
Instances use an ephemeral volume by default. This kind of volume does not save the changes made on it and reverts to its original state when the current user relinquishes control. One of the methods for storing data permanently in OpenStack cloud is the use of a block storage service named Cinder. This service is similar to the Amazon EBS service by its functions.
Figure 9-1 shows the main components of Cinder.
Figure 9-1. Architecture of Cinder
OpenStack block ...