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Chapter 29. Removing Stratis file systems
You can remove an existing Stratis file system, or a Stratis pool, by destroying data on them.
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.
29.1. 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.
poolComposed 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-cachetarget.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.
filesystemEach 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.
ImportantStratis 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-fspath.
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.
29.2. Removing a Stratis file system
This procedure removes an existing Stratis file system. Data stored on it are lost.
Prerequisites
- Stratis is installed. See Installing Stratis.
-
The
stratisdservice is running. - You have created a Stratis file system. See Creating a Stratis filesystem.
Procedure
Unmount the file system:
# umount /dev/stratis/my-pool/my-fs
Destroy the file system:
# stratis filesystem destroy my-pool my-fs
Verify that the file system no longer exists:
# stratis filesystem list my-pool
Additional resources
-
stratis(8)man page on your system
29.3. 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.
Deleting a Stratis pool file system erases all the data it contains.
Prerequisites
You have installed the RHEL 8 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
stratisdservice is running. - You have an existing Stratis pool.
- You have created a file system on the Stratis pool.
Procedure
Log in to the RHEL 8 web console.
For details, see Logging in to the web console.
- Click .
- In the Storage table, click the Stratis pool from which you want to delete a file system.
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.
From the drop-down menu, select .
- In the Confirm deletion dialog box, click .
29.4. Removing a Stratis pool
This procedure removes an existing Stratis pool. Data stored on it are lost.
Prerequisites
- Stratis is installed. See Installing Stratis.
-
The
stratisdservice is running. You have created a Stratis pool:
- To create an unencrypted pool, see Creating an unencrypted Stratis pool
- To create an encrypted pool, see Creating an encrypted Stratis pool.
Procedure
List file systems on the pool:
# stratis filesystem list my-poolUnmount 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
Destroy the file systems:
# stratis filesystem destroy my-pool my-fs-1 my-fs-2
Destroy the pool:
# stratis pool destroy my-poolVerify that the pool no longer exists:
# stratis pool list
Additional resources
-
stratis(8)man page on your system
29.5. Deleting a Stratis pool by using the web console
You can use the web console to delete an existing Stratis pool.
Deleting a Stratis pool erases all the data it contains.
Prerequisites
You have installed the RHEL 8 web console.
For instructions, see Installing and enabling the web console.
-
The
stratisdservice is running. - You have an existing Stratis pool.
Procedure
Log in to the RHEL 8 web console.
For details, see Logging in to the web console.
- Click .
- In the Storage table, click the menu button, , next to the Stratis pool you want to delete.
- From the drop-down menu, select .
- In the Permanently delete pool dialog box, click .
