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Chapter 28. Removing Stratis file systems

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You can remove an existing Stratis file system, or a Stratis pool, by destroying data on them.

28.1. Components of a Stratis volume

Learn about the components that comprise a Stratis volume.

Externally, Stratis presents the following volume components in the command-line interface and the API:

blockdev
Block devices, such as a disk or a disk partition.
pool

Composed of one or more block devices.

A pool has a fixed total size, equal to the size of the block devices.

The pool contains most Stratis layers, such as the non-volatile data cache using the dm-cache target.

Stratis creates a /dev/stratis/my-pool/ directory for each pool. This directory contains links to devices that represent Stratis file systems in the pool.

filesystem

Each pool can contain one or more file systems, which store files.

File systems are thinly provisioned and do not have a fixed total size. The actual size of a file system grows with the data stored on it. If the size of the data approaches the virtual size of the file system, Stratis grows the thin volume and the file system automatically.

The file systems are formatted with XFS.

Important

Stratis tracks information about file systems created using Stratis that XFS is not aware of, and changes made using XFS do not automatically create updates in Stratis. Users must not reformat or reconfigure XFS file systems that are managed by Stratis.

Stratis creates links to file systems at the /dev/stratis/my-pool/my-fs path.

Note

Stratis uses many Device Mapper devices, which show up in dmsetup listings and the /proc/partitions file. Similarly, the lsblk command output reflects the internal workings and layers of Stratis.

28.2. Removing a Stratis file system

This procedure removes an existing Stratis file system. Data stored on it are lost.

Prerequisites

Procedure

  1. Unmount the file system:

    # umount /dev/stratis/my-pool/my-fs
  2. Destroy the file system:

    # stratis filesystem destroy my-pool my-fs
  3. Verify that the file system no longer exists:

    # stratis filesystem list my-pool

Additional resources

  • stratis(8) man page.

28.3. Deleting a file system from a Stratis pool by using the web console

You can use the web console to delete a file system from an existing Stratis pool.

Note

Deleting a Stratis pool file system erases all the data it contains.

Prerequisites

  • You have installed the RHEL 9 web console.

    For instructions, see Installing and enabling the web console.

  • Stratis is installed.

    The web console detects and installs Stratis by default. However, for manually installing Stratis, see Installing Stratis.

  • The stratisd service is running.
  • You have an existing Stratis pool.
  • You have created a file system on the Stratis pool.

Procedure

  1. Log in to the RHEL 9 web console.

    For details, see Logging in to the web console.

  2. Click Storage.
  3. In the Storage table, click the Stratis pool from which you want to delete a file system.
  4. On the Stratis pool page, scroll to the Stratis filesystems section and click the menu button next to the file system you want to delete.

    Image displaying the Stratis pool page.

  5. From the drop-down menu, select delete.

    Image displaying the drop-down menu of a stratis file system.

  6. In the Confirm deletion dialog box, click Delete.

28.4. Removing a Stratis pool

This procedure removes an existing Stratis pool. Data stored on it are lost.

Prerequisites

Procedure

  1. List file systems on the pool:

    # stratis filesystem list my-pool
  2. Unmount all file systems on the pool:

    # umount /dev/stratis/my-pool/my-fs-1 \
             /dev/stratis/my-pool/my-fs-2 \
             /dev/stratis/my-pool/my-fs-n
  3. Destroy the file systems:

    # stratis filesystem destroy my-pool my-fs-1 my-fs-2
  4. Destroy the pool:

    # stratis pool destroy my-pool
  5. Verify that the pool no longer exists:

    # stratis pool list

Additional resources

  • stratis(8) man page.

28.5. Deleting a Stratis pool by using the web console

You can use the web console to delete an existing Stratis pool.

Note

Deleting a Stratis pool erases all the data it contains.

Prerequisites

Procedure

  1. Log in to the RHEL 9 web console.

    For details, see Logging in to the web console.

  2. Click Storage.
  3. In the Storage table, click the menu button, , next to the Stratis pool you want to delete.
  4. From the drop-down menu, select Delete pool.
  5. In the Permanently delete pool dialog box, click Delete.

28.6. Additional resources

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