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Chapter 25. Extending a Stratis pool with additional block devices

You can attach additional block devices to a Stratis pool to provide more storage capacity for Stratis file systems. You can do it manually or by using the web console.

Important

Stratis is a Technology Preview feature only. Technology Preview features are not supported with Red Hat production service level agreements (SLAs) and might not be functionally complete. Red Hat does not recommend using them in production. These features provide early access to upcoming product features, enabling customers to test functionality and provide feedback during the development process. For more information about the support scope of Red Hat Technology Preview features, see https://access.redhat.com/support/offerings/techpreview.

25.1. Adding block devices to a Stratis pool
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You can add one or more block devices to a Stratis pool.

Prerequisites

  • Stratis is installed and the stratisd service is running. For more information, see Installing Stratis.
  • The block device on which you are creating a Stratis pool is not in use, unmounted, and is at least 1 GB in space.

Procedure

  • To add one or more block devices to the pool, use: 

    # stratis pool add-data my-pool device-1 device-2 device-n
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You can use the web console to add a block device to an existing Stratis pool. You can also add caches as a block device.

Prerequisites

  • You have installed the RHEL 8 web console.
  • You have enabled the cockpit service.

  • Your user account is allowed to log in to the web console.

    For instructions, see Installing and enabling the web console.

  • The stratisd service is running.
  • A Stratis pool is created.
  • The block device on which you are creating a Stratis pool is not in use, unmounted, and is at least 1 GB in space.

Procedure

  1. Log in to the RHEL 8 web console.

    For details, see Logging in to the web console.

  2. Click Storage.
  3. In the Storage table, click the Stratis pool to which you want to add a block device.
  4. On the Stratis pool page, click Add block devices and select the Tier where you want to add a block device as data or cache.
  5. If you are adding the block device to a Stratis pool that is encrypted with a passphrase, enter the passphrase.
  6. Under Block devices, select the devices you want to add to the pool.
  7. Click Add.
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