7.2. Preparing and Adding NFS Storage

Procedure 7.1. Configuring the Required System User Accounts and System User Groups

1. Create the group kvm:

   # groupadd kvm -g 36

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2. Create the user vdsm in the group kvm:

   # useradd vdsm -u 36 -g 36

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3. Set the ownership of your exported directories to 36:36, which gives vdsm:kvm ownership:

   # chown -R 36:36 /exports/data
   # chown -R 36:36 /exports/export

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4. Change the mode of the directories so that read and write access is granted to the owner, and so that read and execute access is granted to the group and other users:

   # chmod 0755 /exports/data
   # chmod 0755 /exports/export

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1. In the Red Hat Enterprise Virtualization Manager Administration Portal, click the Storage resource tab.
2. Click New Domain.
   

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   Figure 7.1. The New Domain Window

3. Enter a Name for the storage domain.
4. Accept the default values for the Data Center, Domain Function, Storage Type, Format, and Use Host lists.
5. Enter the Export Path to be used for the storage domain.
   The export path should be in the format of 192.168.0.10:/data or domain.example.com:/data.
6. Optionally, you can configure the advanced parameters.
   1. Click Advanced Parameters.
   2. Enter a percentage value into the Warning Low Space Indicator field. If the free space available on the storage domain is below this percentage, warning messages are displayed to the user and logged.
   3. Enter a GB value into the Critical Space Action Blocker field. If the free space available on the storage domain is below this value, error messages are displayed to the user and logged, and any new action that consumes space, even temporarily, will be blocked.
   4. Select the Wipe After Delete check box to enable the wipe after delete option. This option can be edited after the domain is created, but doing so will not change the wipe after delete property of disks that already exist.
7. Click OK.
   The new NFS data domain is displayed in the Storage tab with a status of Locked until the disk is prepared. The data domain is then automatically attached to the data center.

Procedure 7.2. Increasing an Existing NFS Storage Domain

1. Click the Storage resource tab and select an NFS storage domain.
2. In the details pane, click the Data Center tab and click the Maintenance button to place the storage domain into maintenance mode. This unmounts the existing share and makes it possible to resize the storage domain.
3. On the NFS server, resize the storage. For Red Hat Enterprise Linux 6 systems, see Red Hat Enterprise Linux 6 Storage Administration Guide. For Red Hat Enterprise Linux 7 systems, see Red Hat Enterprise Linux 7 Storage Administration Guide.
4. In the details pane, click the Data Center tab and click the Activate button to mount the storage domain.