Common OpenStack storage tasks

This section outlines a number of common tasks using the OpenStack Block and Object Storage service. For more information on storage, refer to Chapter 7, Cinder – OpenStack Block Storage and Chapter 8, Swift – OpenStack Object Storage.

Getting ready

Ensure that you have the OpenStack clients installed, as described in the first recipes of this chapter.

How to do it…

Carry out the following steps to create and modify users and projects in OpenStack:

Create a new Cinder volume

To create a new Cinder block storage volume, carry out the following command. The size is in gigabytes:

openstack volume create --size 5 my5GVolume

Attaching a volume

To attach a volume to a running instance, carry out the following command. The running instance UUID is used and can be found by listing the running instances:

openstack server add volume my5GVolume 58ea640b-16ba-447c-85db-952174d70f7c

Detaching a volume

To detach a volume, first unmount it from the running instance as you would normally, then carry out the following command:

openstack server remove volume my5GVolume 58ea640b-16ba-447c-85db-952174d70f7c

Creating a volume snapshot

To make a snapshot of a volume, carry out the following steps. First, you must detach the volume from the running instance to ensure data consistency. The action is described in the previous task.

Now once detached, issue the following

openstack snapshot create --name myVolumeSnapshot myVolume

Listing Object Storage statistics

To display information about Object Storage containers, carry out the following command:

openstack object store account show

Listing Object Storage containers and contents

To list contents of an object store, issue the following command:

openstack object store list
openstack object store list myContainer

Creating and uploading files to the Object Storage service

To create an Object Storage container, issue the following command:

openstack object create myContainer

To upload files to an Object Storage container, issue the following command:

openstack object create myContainer myFile  

Downloading from Object Storage

To download files from an Object Storage container, use this command

openstack object save myContainer myFile

To download all files from an Object Storage container, issue the following command

openstack object save myContainer
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