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OpenStack Cloud Computing Cookbook, Third Edition
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Within Cinder, volume snapshots provide a way to non-disruptively copy a volume. This allows for volume backups. It also enables more advanced backup features and provides the ability to boot an instance from a given snapshot or point in time.
In this section, we will show you how to create a snapshot, refresh a snapshot, and delete a given snapshot.
Ensure that you are logged in to the Ubuntu host where the Cinder command-line utilities are installed and source your OpenStack environment admin credentials.
To create a snapshot, the volume must not be attached to an instance. To list your current volumes, you can use the cinder list
command:
$ cinder list
Here's the output:
If the volume you wish to take a snapshot of has an in-use
status, you will need to detach it using the instructions in the Detaching volumes from an instance recipe in this chapter.
As our volume is available, we will create a snapshot of the volume using the cinder...
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