⁠4.5. Data Center Tasks

4.5.1. Creating a New Data Center
4.5.2. Explanation of Settings in the New Data Center and Edit Data Center Windows
4.5.3. Editing a Resource
4.5.4. Creating a New Logical Network in a Data Center or Cluster
4.5.5. Removing a Logical Network
4.5.6. Re-Initializing a Data Center: Recovery Procedure
4.5.7. Removing a Data Center
4.5.8. Force Removing a Data Center
4.5.9. Changing the Data Center Compatibility Version

⁠4.5.1. Creating a New Data Center

Summary
This procedure creates a data center in your virtualization environment. The data center requires a functioning cluster, host, and storage domain to operate.

Note

The storage Type can be edited until the first storage domain is added to the data center. Once a storage domain has been added, the storage Type cannot be changed.
If you set the Compatibility Version as 3.1, it cannot be changed to 3.0 at a later time; version regression is not allowed.
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Procedure 4.1. Creating a New Data Center

  1. Select the Data Centers resource tab to list all data centers in the results list.
  2. Click New to open the New Data Center window.
  3. Enter the Name and Description of the data center.
  4. Select the storage Type, Compatibility Version, and Quota Mode of the data center from the drop-down menus.
  5. Click OK to create the data center and open the New Data Center - Guide Me window.
  6. The Guide Me window lists the entities that need to be configured for the data center. Configure these entities or postpone configuration by clicking the Configure Later button; configuration can be resumed by selecting the data center and clicking the Guide Me button.
Result
The new data center is added to the virtualization environment. It will remain Uninitialized until a cluster, host, and storage domain are configured for it; use Guide Me to configure these entities.

⁠4.5.2. Explanation of Settings in the New Data Center and Edit Data Center Windows

The table below describes the settings of a data center as displayed in the New Data Center and Edit Data Center windows. Invalid entries are outlined in orange when you click OK, prohibiting the changes being accepted. In addition, field prompts indicate the expected values or range of values.
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Table 4.1. Data Center Properties

Field
Description/Action
Name
The name of the data center. This text field has a 40-character limit and must be a unique name with any combination of uppercase and lowercase letters, numbers, hyphens, and underscores.
Description
The description of the data center. This field is recommended but not mandatory.
Type
The storage type. Choose one of the following:
  • Shared
  • Local
The type of data domain dictates the type of the data center and cannot be changed after creation without significant disruption. Multiple types of storage domains (iSCSI, NFS, FC, POSIX, and Gluster) can be added to the same data center, though local and shared domains cannot be mixed.
Compatibility Version
The version of Red Hat Enterprise Virtualization. Choose one of the following:
  • 3.0
  • 3.1
  • 3.2
  • 3.3
  • 3.4
  • 3.5
After upgrading the Red Hat Enterprise Virtualization Manager, the hosts, clusters and data centers may still be in the earlier version. Ensure that you have upgraded all the hosts, then the clusters, before you upgrade the Compatibility Level of the data center.
Quota Mode
Quota is a resource limitation tool provided with Red Hat Enterprise Virtualization. Choose one of:
  • Disabled: Select if you do not want to implement Quota
  • Audit: Select if you want to edit the Quota settings
  • Enforced: Select to implement Quota

⁠4.5.3. Editing a Resource

Summary
Edit the properties of a resource.
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Procedure 4.2. Editing a Resource

  1. Use the resource tabs, tree mode, or the search function to find and select the resource in the results list.
  2. Click Edit to open the Edit window.
  3. Change the necessary properties and click OK.
Result
The new properties are saved to the resource. The Edit window will not close if a property field is invalid.

⁠4.5.4. Creating a New Logical Network in a Data Center or Cluster

Summary
Create a logical network and define its use in a data center, or in clusters in a data center.
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Procedure 4.3. Creating a New Logical Network in a Data Center or Cluster

  1. Use the Data Centers or Clusters resource tabs, tree mode, or the search function to find and select a data center or cluster in the results list.
  2. Click the Logical Networks tab of the details pane to list the existing logical networks.
    • From the Data Centers details pane, click New to open the New Logical Network window.
    • From the Clusters details pane, click Add Network to open the New Logical Network window.
  4. Enter a Name, Description, and Comment for the logical network.
  5. Optionally select the Create on external provider check box. Select the External Provider from the drop-down list and provide the IP address of the Physical Network.
    If Create on external provider is selected, the Network Label, VM Network, and MTU options are disabled.
  6. Enter a new label or select an existing label for the logical network in the Network Label text field.
  7. Optionally enable Enable VLAN tagging.
  8. Optionally disable VM Network.
  9. Set the MTU value to Default (1500) or Custom.
  10. From the Cluster tab, select the clusters to which the network will be assigned. You can also specify whether the logical network will be a required network.
  11. If Create on external provider is selected, the Subnet tab will be visible. From the Subnet tab, select the Create subnet and enter a Name, CIDR, and Gateway address, and select an IP Version for the subnet that the logical network will provide. You can also add DNS servers as required.
  12. From the vNIC Profiles tab, add vNIC profiles to the logical network as required.
  13. Click OK.
Result
You have defined a logical network as a resource required by a cluster or clusters in the data center. If you entered a label for the logical network, it will be automatically added to all host network interfaces with that label.

Note

When creating a new logical network or making changes to an existing logical network that is used as a display network, any running virtual machines that use that network must be rebooted before the network becomes available or the changes are applied.

⁠4.5.5. Removing a Logical Network

Summary
Remove a logical network from the Manager.
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Procedure 4.4. Removing Logical Networks

  1. Use the Data Centers resource tab, tree mode, or the search function to find and select the data center of the logical network in the results list.
  2. Click the Logical Networks tab in the details pane to list the logical networks in the data center.
  3. Select a logical network and click Remove to open the Remove Logical Network(s) window.
  4. Optionally, select the Remove external network(s) from the provider(s) as well check box to remove the logical network both from the Manager and from the external provider if the network is provided by an external provider.
  5. Click OK.
Result
The logical network is removed from the Manager and is no longer available. If the logical network was provided by an external provider and you elected to remove the logical network from that external provider, it is removed from the external provider and is no longer available on that external provider as well.

⁠4.5.6. Re-Initializing a Data Center: Recovery Procedure

Summary
This recovery procedure replaces the master data domain of your data center with a new master data domain; necessary in the event of data corruption of your master data domain. Re-initializing a data center allows you to restore all other resources associated with the data center, including clusters, hosts, and non-problematic storage domains.
You can import any backup or exported virtual machines or templates into your new master data domain.
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Procedure 4.5. Re-Initializing a Data Center

  1. Click the Data Centers resource tab and select the data center to re-initialize.
  2. Ensure that any storage domains attached to the data center are in maintenance mode.
  3. Right-click the data center and select Re-Initialize Data Center from the drop-down menu to open the Data Center Re-Initialize window.
  4. The Data Center Re-Initialize window lists all available (detached; in maintenance mode) storage domains. Click the radio button for the storage domain you are adding to the data center.
  5. Select the Approve operation check box.
  6. Click OK to close the window and re-initialize the data center.
Result
The storage domain is attached to the data center as the master data domain and activated. You can now import any backup or exported virtual machines or templates into your new master data domain.

⁠4.5.7. Removing a Data Center

Summary
An active host is required to remove a data center. Removing a data center will not remove the associated resources.
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Procedure 4.6. Removing a Data Center

  1. Ensure the storage domains attached to the data center is in maintenance mode.
  2. Click the Data Centers resource tab and select the data center to remove.
  3. Click Remove to open the Remove Data Center(s) confirmation window.
  4. Click OK.
Result
The data center has been removed.

⁠4.5.8. Force Removing a Data Center

Summary
A data center becomes Non Responsive if the attached storage domain is corrupt or if the host becomes Non Responsive. You cannot Remove the data center under either circumstance.
Force Remove does not require an active host. It also permanently removes the attached storage domain.
It may be necessary to Destroy a corrupted storage domain before you can Force Remove the data center.
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Procedure 4.7. Force Removing a Data Center

  1. Click the Data Centers resource tab and select the data center to remove.
  2. Click Force Remove to open the Force Remove Data Center confirmation window.
  3. Select the Approve operation check box.
  4. Click OK
Result
The data center and attached storage domain are permanently removed from the Red Hat Enterprise Virtualization environment.

⁠4.5.9. Changing the Data Center Compatibility Version

Summary
Red Hat Enterprise Virtualization data centers have a compatibility version. The compatibility version indicates the version of Red Hat Enterprise Virtualization that the data center is intended to be compatible with. All clusters in the data center must support the desired compatibility level.

Note

To change the data center compatibility version, you must have first updated all the clusters in your data center to a level that supports your desired compatibility level.
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Procedure 4.8. Changing the Data Center Compatibility Version

  1. Log in to the Administration Portal as the administrative user. By default this is the admin user.
  2. Click the Data Centers tab.
  3. Select the data center to change from the list displayed. If the list of data centers is too long to filter visually then perform a search to locate the desired data center.
  4. Click the Edit button.
  5. Change the Compatibility Version to the desired value.
  6. Click OK.
Result
You have updated the compatibility version of the data center.

Warning

Upgrading the compatibility will also upgrade all of the storage domains belonging to the data center. If you are upgrading the compatibility version from below 3.1 to a higher version, these storage domains will become unusable with versions older than 3.1.