Chapter 7. Block Storage
Cinder is the block storage component in OpenStack. In the previous chapter, all the necessary resources were collected to launch an instance. Now that this instance is running, let's look at the use case for block storage and the process of attaching block storage to the OpenStack instance. Then, we will take a look at the storage engine used to store these block devices and the other options available for the backing store.
Use case
OpenStack instances run on ephemeral disks—disks that only exist for the life of the instance. When an instance is terminated, the disk is discarded. This is a problem if there is any information that requires persistence. Block storage is one type of storage that can be used to persist data ...
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