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Chapter 4. Creating and Tuning Volumes Using Red Hat
Enterprise Virtualization Manager
You can create and tune Red Hat Storage volumes using the Red Hat Enterprise Virtualization Manager
3.1 and later versions by creating a cluster with Enable Gluster Service option selected.
A volume is a logical collection of bricks where each brick is an export directory on a server in the
trusted storage pool. Most of the management operations of Red Hat Storage happen on the volume.
You can use the Red Hat Enterprise Virtualization Manager 3.1 to create and start new volumes
featuring a single global namespace.
Important
Enable Gluster Service is a technology preview feature. Technology Preview features are
not fully supported under Red Hat subscription level agreements (SLAs), may not be functionally
complete, and are not intended for production use. However, these features provide early access
to upcoming product innovations, enabling customers to test functionality and provide feedback
during the development process. As Red Hat considers making future iterations of Technology
Preview features generally available, we will provide commercially reasonable efforts to resolve
any reported issues that customers experience when using these features.
Note
With the exception of volume operations described in this section, all other Red Hat Storage
functionality must be executed from the command line.
To create and tune volumes using the Red Hat Enterprise Virtualization Manager:
1. Create a Data center.
a. Select the Data Centers resource tab to list all data centers in the results list.
b. Click the New button to open the New Data Center window.
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Red Hat Storage 2.0 Quick Start Guide
Figure 4 .1. New Data Center window
c. Enter the Name and Description of the data center.
d. Select the storage Type as POSIX compliant FS from the drop-down menu.
Ensure to choose Quota Mode as Disabled.
e. Click OK.
The new data center is added to the virtualization environment. It will remain Uninitialized
until a cluster, host, and storage is configured.
2. Create a gluster service enabled cluster.
For more information on creating a cluster, refer Step 2 of Section 3.2, Adding POSIX Compliant
File System Storage
Figure 4 .2. Create a Cluster
Select the CPU Name and Compatibility Version from the drop-down menus.
Click OK
3. Add Hosts.
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Chapter 4. Creating and Tuning Volumes Using Red Hat Enterprise Virtualization Manager
Note
You must first add a Red Hat Storage server to the cluster only then you can add multiple
servers to the cluster. Adding multiple servers first will display an error message.
Figure 4 .3. New Host window
4. Use the drop-down menus to select the Data Center and Host Cluster for the new host.
5. Click OK.
The new host displays in the list of hosts with a status of Installing. Once installation is
complete, the status will update to Reboot. The host is activated and the status changes to Up
automatically after Reboot.
Click Volumes node from the left tree of the console window.
6. Click Create Volume to open the Create Volume window.
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Red Hat Storage 2.0 Quick Start Guide
Figure 4 .4 . Create Volume window
7. In the Name field, enter the name of the volume.
8. Select the type of the volume from the Type drop-down list. You can choose the volume type as
either Distribute, Replicate, or Distribute Replicate.
To host virtual machines, it is recommended to create a volume type as Replicate or Distributed
Replicate.
Important
Stripe and Distributed Stripe volume types are under technology preview.
Technology Preview features are not fully supported under Red Hat subscription level
agreements (SLAs), may not be functionally complete, and are not intended for production
use. However, these features provide early access to upcoming product innovations,
enabling customers to test functionality and provide feedback during the development
process. As Red Hat considers making future iterations of Technology Preview features
generally available, we will provide commercially reasonable efforts to resolve any reported
issues that customers experience when using these features.
9. Click Add Bricks to add bricks to your volume.
Brick is the basic unit of storage, represented by an export directory on a server in the storage
cluster. You can expand or shrink your cluster by adding new bricks or deleting bricks.
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Chapter 4. Creating and Tuning Volumes Using Red Hat Enterprise Virtualization Manager
Figure 4 .5. Add Bricks
Enter the brick directory path and click OK.
10. In the Allow Access From field, specify the volume access control as a comma-separated list
of IP addresses or hostnames.
By default, an asterisk (*) is used as a wildcard to specify ranges of addresses such as IP
addresses or hostnames. You need to use IP-based authentication for Gluster and NFS exports.
11. Click OK to create the volume.
The new volume is added and displays on the Volumes tab.
12. Select the volume that you want to tune and click Optimize for Virt Store.
The volume is tuned and group, storage-owner-uid, and storage-owner-gid options are
set.
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Red Hat Storage 2.0 Quick Start Guide
Figure 4 .6. Volume Options
For more information on each volume set tunable option, refer to Chapter 10. Managing Red
Hat Storage Volumes of Red Hat Storage 2.0 Administration Guide.
13. In the Volumes tab, select the new volume and click Start to start the volume.
The volume status changes to Up.
Note
You must ensure to optimize the volume before you can attach the volume to your storage
domain.
Figure 4 .7. New Volume
You can create a storage domain using the optimized volume and manage it using Red Hat Enterprise
Virtualization Manager. Refer to Red Hat Storage 2.0 Console Administration Guide for more information
on managing volumes such as start, stop, expand, shrink, add and edit volume options.
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Revision History
Revision History
Revision 1.0-14 .4 00 2013-10-31 Rüdiger Landmann
Rebuild with publican 4.0.0
Revision 1.0-14 Mon April 01 2013 Anjana Suparna Sriram.
Incorporated feedback.
Revision 1.0-13 Mon April 01 2013 Anjana Suparna Sriram.
Updated Links.
Revision 1.0-12 Mon April 01 2013 Anjana Suparna Sriram.
Updated Links.
Revision 1.0-11 Tue March 27 2013 Anjana Suparna Sriram.
Screenshots updated.
Revision 1.0-10 Tue March 26 2013 Anjana Suparna Sriram.
Incorporated feedback.
Revision 1.0-9 Wed Feb 13 2013 Anjana Suparna Sriram.
Bug Fixes.
Revision 1.0-8 Wed Dec 06 2012 Anjana Suparna Sriram.
Incorporated technical review feedback.
Revision 1.0-6 Wed Dec 05 2012 Anjana Suparna Sriram.
Incorporated technical review feedback and updated Known Issues chapter.
Revision 1.0-4 Fri Nov 09 2012 Anjana Suparna Sriram.
Incorporated technical review feedback.
Revision 1.0-3 Thu Nov 08 2012 Anjana Suparna Sriram.
Added a new section, images, and known issues.
Revision 1.0-2 Wed Oct 31 2012 Anjana Suparna Sriram.
Updated the Installation chapter with new instructions regarding configuring the hypervisors.
Revision 1.0-1 Wed Oct 10 2012 Anjana Suparna Sriram.
Incorporated technical feedback.
Added additional images.
Revision 1.0-0 Fri Oct 5 2012 Anjana Suparna Sriram.
Initial creation of this book for Beta
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