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XFS Quota Prerequisites

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4.2.x

To enable XFS Quota on LocalPV Hostpath, certain prerequisites must be met to ensure proper configuration and functionality. This involves installing the necessary xfsprogs package, verifying the filesystem type, and configuring the appropriate mount options, such as pquota.

The following steps outline the installation and configuration procedures for both root and data disk filesystems on Ubuntu, Debian, RHEL, and CentOS systems. By completing these steps, you will be ready to enable and manage XFS Quotas on your OpenEBS LocalPV Hostpath setup.

Install the xfsprogs Package#

For Ubuntu/Debian Systems

To install the xfsprogs package on Ubuntu and Debian systems, execute the following command:

$ sudo apt-get update
$ sudo apt-get install -y xfsprogs

For RHEL/CentOS Systems

To install the xfsprogs package on RHEL/CentOS systems, execute the following command:

$ sudo yum install -y xfsprogs

For Fedora

To install the xfsprogs package on Fedora, execute the following command:

$ sudo dnf install -y xfsprogs

Mount Filesystem using the pquota Mount Option#

  1. Check the Filesystem Type

Verify whether the filesystem of the hostPath directory is XFS. The default hostPath directory is /var/openebs/local. Execute the following command to check if the filesystem is XFS and to identify the device where the filesystem is stored:

$ df -Th /var/openebs/local

Example Output

Filesystem Type Size Used Avail Use% Mounted on
/dev/nvme0n1p1 xfs 8.0G 959M 7.1G 12% /

If the above command fails due to the path not yet existing, execute the following script to check the filesystem type and host device name of the directory:

BASEPATH="/var/openebs/local"
until OUTPUT=$(df -Th $BASEPATH 2> /dev/null)
do
BASEPATH=$(echo "$BASEPATH" | sed 's|\(.*\)/.*|\1|')
done
echo "PATH=${BASEPATH}"
#Final output
echo "$OUTPUT"
  1. Check Existing Mount Options

Ensure that the mount options for the device found in Step 1 include pquota or prjquota. Execute the following command to verify the mount options for the device (Example: /dev/nvme0n1p1).

$ sudo mount | grep "^/dev/nvme0n1p1"

Example Output

/dev/nvme0n1p1 on / type xfs (rw,relatime,seclabel,attr2,inode64,noquota)

If the mount options already include pquota or prjquota, you can proceed to the next section to Enable XFS Quota. If not, continue with Step 3.

  1. Mount the Device with pquota Option

In this step, we will mount the device using the pquota mount option. If the filesystem is the root filesystem (/), follow the instructions below. If the filesystem is located on a data disk, you can proceed to the Filesystem on Data Disk section.

Root Filesystem:

To enable pquota for the root filesystem, modify the GRUB_CMDLINE_LINUX option in the /etc/default/grub file.

  • Edit the file /etc/default/grub.
$ sudo vi /etc/default/grub
  • Locate the line containing the variable GRUB_CMDLINE_LINUX.
GRUB_CMDLINE_LINUX="console=tty0 crashkernel=auto net.ifnames=0 console=ttyS0"
  • Add rootflags=pquota at the end of the string. If rootflags option is already present, append pquota to the list of options.
GRUB_CMDLINE_LINUX="console=tty0 crashkernel=auto net.ifnames=0 console=ttyS0 rootflags=pquota"

  • Locate the grub.cfg file. The file path may vary based on your OS.

    • /boot/grub2/grub.cfg
    • /boot/efi/EFI/ubuntu/grub.cfg
    • /boot/efi/EFI/debian/grub.cfg
    • /boot/efi/EFI/redhat/grub.cfg
    • /boot/efi/EFI/centos/grub.cfg
    • /boot/efi/EFI/fedora/grub.cfg

  • Create a backup copy of the existing grub.cfg. The sample commands below use the path /boot/grub2/grub.cfg. Replace the paths with your grub.cfg path.

$ sudo cp /boot/grub2/grub.cfg /boot/grub2/grub.cfg.backup
  • Generate a new grub.cfg that includes the changes.
$ sudo grub2-mkconfig -o /boot/grub2/grub.cfg
  • Reboot the system.
$ sudo reboot
  • After rebooting, check the mount options again to confirm the changes.
$ sudo mount | grep "^/dev/nvme0n1p1"

Expected Output

/dev/nvme0n1p1 on / type xfs (rw,relatime,seclabel,attr2,inode64,prjquota)

Filesystem on Data Disk#

If the filesystem is located on a data disk, follow these steps:

  1. Unmount the filesystem on the data disk (Replace /dev/nvme1n1 and /mnt/data with your device and mount path).
$ sudo umount /dev/nvme1n1
  1. Mount the disk using the pquota mount option.
$ sudo mount -o rw,pquota /dev/nvme1n1 /mnt/data
caution

pquota is not usable with remount mount option.

  1. Verify the mount options.
$ sudo mount | grep "^/dev/nvme1n1"

Expected Output

/dev/nvme1n1 on /mnt/data type xfs (rw,relatime,seclabel,attr2,inode64,prjquota)
  1. Add the pquota option to the /etc/fstab file for the data disk to make the changes persistent across reboots.
UUID=9cff3d69-3769-4ad9-8460-9c54050583f9 /mnt/data xfs defaults,pquota 0 0

See Also#

On this page:

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