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LightSail VPS: Enable Filesystem Quota

Tags: awsLightSail

Scenario:

AWS LightSail VPS are provided with XFS filesystem. But, we cannot enable the quota simply by the mount options in /etc/fstab, but this support needs to be enabled at the kernel level on the boot itself.

Enabling Quota

Step 1: Modifying the GRUB configuration

Modern Operating System uses GRUBv2. We need to modify the grub2.cfg. Directly modifying the grub2.cfg is not recommended. So, we have to tweak the kernel parameters and rebuild the grub2.cfg.

Open the configuration file /etc/default/grub and add the option rootflags=uquota into GRUB_CMDLINE_LINUX

/etc/default/grub

Step 2: Re-generating the new grub2.cfg

The grub2.cnf can be re-generated using the following command

grub2-mkconfig -o /boot/grub2/grub.cfg

Step 3: Enabling Quota via /etc/fstab

Add the option uquota  to the mount options

UUID=f41e390f-835b-4223-a9bb-9b45984ddf8d   /   xfs defaults,uquota 0   0

Step 4: Rebooting the server to apply the change

The server needs to be rebooted to apply the changes. Make sure its okay to reboot this server now.

Step 5: Check Quota Status

You can verify the quota using the following command:

xfs_quota -x -c state

Sample output

User quota state on / (/dev/xvda1)
  Accounting: ON
  Enforcement: ON
  Inode: #2991229 (15 blocks, 13 extents)
Group quota state on / (/dev/xvda1)
  Accounting: OFF
  Enforcement: OFF
  Inode: #0 (0 blocks, 0 extents)
Project quota state on / (/dev/xvda1)
  Accounting: OFF
  Enforcement: OFF
  Inode: #0 (0 blocks, 0 extents)
Blocks grace time: [7 days]
Inodes grace time: [7 days]
Realtime Blocks grace time: [7 days]

Category : Linux