Chapter 4. Configuring a single node RHHI for Virtualization deployment

4.1. Configuring Red Hat Gluster Storage on a single node

Important

Ensure that disks specified as part of this deployment process do not have any partitions or labels.

  1. Log into the Cockpit UI

    Browse to the Cockpit management interface of the first virtualization host, for example, https://node1.example.com:9090/, and log in with the credentials you created in Chapter 3, Install the virtualization host.

  2. Start the deployment wizard

    1. Click Virtualization → Hosted Engine and click Start underneath Hyperconverged.

      Hosted Engine Setup screen with Start buttons underneath the Hosted Engine and Hyperconverged options

      The Gluster Configuration window opens.

    2. Click the Run Gluster Wizard button.

      Selecting the type of hyperconverged deployment in Cockpit

      The Gluster Deployment window opens in single node mode.

  3. Specify storage host

    Specify the back-end FQDN on the storage network of the virtualization host and click Next.

    The Hosts tab of the single node deployment wizard

  4. Specify volumes

    Specify the volumes to create.

    The Volumes tab of the single node deployment wizard
    Name
    Specify the name of the volume to be created.
    Volume Type

    Specify a Distribute volume type. Only distributed volumes are supported for single node deployments.

    Important

    This step is affected by a known issue, BZ#1641483. It is not currently possible to select Distribute. Instead, select Replicated. The volume created is a single-brick distributed volume, which is correct for single-node RHHI for Virtualization deployments.

    Brick Dirs
    The directory that contains this volume’s bricks.

  5. Specify bricks

    Specify the bricks to create.

    The Bricks tab of the single node deployment wizard
    RAID
    Specify the RAID configuration to use. This should match the RAID configuration of your host. Supported values are raid5, raid6, and jbod. Setting this option ensures that your storage is correctly tuned for your RAID configuration.
    Stripe Size
    Specify the RAID stripe size in KB. Do not enter units, only the number. This can be ignored for jbod configurations.
    Disk Count
    Specify the number of data disks in a RAID volume. This can be ignored for jbod configurations.
    LV Name
    Specify the name of the logical volume to be created.
    Device
    Specify the raw device you want to use. Red Hat recommends an unpartitioned device.
    Size
    Specify the size of the logical volume to create in GB. Do not enter units, only the number.
    Mount Point
    Specify the mount point for the logical volume. This should be inside the brick directory that you specified on the previous page of the wizard.
    Thinp
    Specify whether to provision the volume thinly or not. Note that thick provisioning is recommended for the engine volume. Do not use Enable Dedupe & Compression at the same time as this option.
    Enable Dedupe & Compression
    Specify whether to provision the volume using VDO for compression and deduplication at deployment time. Do not use Thinp at the same time as this option.
    Logical Size (GB)
    Specify the logical size of the VDO volume. This can be up to 10 times the size of the physical volume, with an absolute maximum logical size of 4 PB.

  6. Review and edit configuration

    Review the contents of the generated configuration file and click Edit to modify the file, and Save to keep your changes.

    Click Deploy when you are satisfied with the configuration file.

    The Review tab of the single node deployment wizard

  7. Wait for deployment to complete

    You can watch the deployment process in the text field as the gdeploy process runs using the generated configuration file.

    The window displays Successfully deployed gluster when complete.

    Click Continue to Hosted Engine Deployment and continue the deployment process with the instructions in Section 4.2, “Deploy the Hosted Engine on a single node using the Cockpit UI”.

Important

If deployment fails, click the Redeploy button. This returns you to the Review and edit configuration tab so that you can correct any issues in the generated configuration file before reattempting deployment.

It may be necessary to clean up previous deployment attempts before you try again. Follow the steps in Appendix A, Cleaning up automated Red Hat Gluster Storage deployment errors to clean up previous deployment attempts.

4.2. Deploy the Hosted Engine on a single node using the Cockpit UI

This section shows you how to deploy the Hosted Engine on a single node using the Cockpit UI. Following this process results in Red Hat Virtualization Manager running in a virtual machine on your node, and managing that virtual machine. It also configures a Default cluster consisting only of that node, and enables Red Hat Gluster Storage functionality and the virtual-host tuned performance profile for the cluster of one.

Prerequisites

  • This procedure assumes you have continued directly from the end of Configure Red Hat Gluster Storage for Hosted Engine using the Cockpit UI

  • Gather the information you need for Hosted Engine deployment

    Have the following information ready before you start the deployment process.

    • IP address for a pingable gateway to the virtualization host
    • IP address of the front-end management network
    • Fully-qualified domain name (FQDN) for the Hosted Engine virtual machine
    • MAC address that resolves to the static FQDN and IP address of the Hosted Engine

Procedure

  1. Specify virtual machine details

    The VM tab of the Hosted Engine Deployment window with example values entered in all fields.

    1. Enter the following details:

      Engine VM FQDN
      The fully qualified domain name to be used for the Hosted Engine virtual machine.
      MAC Address
      The MAC address associated with the FQDN to be used for the Hosted Engine virtual machine.
      Root password
      The root password to be used for the Hosted Engine virtual machine.
    2. Click Next.

  2. Specify virtualization management details

    1. Enter the password to be used by the admin account in Red Hat Virtualization Manager. You can also specify notification behaviour here.

      The Engine tab of the Hosted Engine Deployment window with example values entered in all fields.
    2. Click Next.

  3. Review virtual machine configuration

    1. Ensure that the details listed on this tab are correct. Click Back to correct any incorrect information.

      The Prepare VM tab of the Hosted Engine Deployment window with configuration details displayed for review.

    2. Click Prepare VM.

      The Prepare VM tab of the Hosted Engine Deployment window showing deployment in progress and various log messages.

    3. Wait for virtual machine preparation to complete.

      The Prepare VM tab of the Hosted Engine Deployment window showing, 'Execution completed successfully. Please proceed to the next step.'

      If preparation does not occur successfully, see Viewing Hosted Engine deployment errors.

    4. Click Next.

  4. Specify storage for the Hosted Engine virtual machine

    1. Specify the back-end address and location of the engine volume.

      The Storage tab of the Hosted Engine Deployment window with the engine volume specified as hosted engine virtual machine storage.
    2. Click Next.

  5. Finalize Hosted Engine deployment

    1. Review your deployment details and verify that they are correct.

      Note

      The responses you provided during configuration are saved to an answer file to help you reinstall the hosted engine if necessary. The answer file is created at /etc/ovirt-hosted-engine/answers.conf by default. This file should not be modified manually without assistance from Red Hat Support.

      The Finish tab of the Hosted Engine Deployment window with details of the Hosted Engine's storage displayed.
    2. Click Finish Deployment.

  6. Wait for deployment to complete

    This takes up to 30 minutes.

    The Finish tab of the Hosted Engine Deployment window showing deployment in progress and various log messages.

    The window displays the following when complete.

    The Finish tab of the Hosted Engine Deployment window showing Hosted Engine deployment complete.
    Important

    If deployment does not complete successfully, see Viewing Hosted Engine deployment errors.

    Click Close.

  7. Verify hosted engine deployment

    Browse to the engine user interface (for example, http://engine.example.com/ovirt-engine) and verify that you can log in using the administrative credentials you configured earlier. Click Dashboard and look for your hosts, storage domains, and virtual machines.

    The Red Hat Virtualization Manager Administration Portal dashboard after deployment.

Next steps