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


GRUB_TIMEOUT=1
GRUB_DISTRIBUTOR=”$(sed ‘s, release .*$,,g’ /etc/system-release)”
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL=”serial console”
GRUB_SERIAL_COMMAND=”serial –speed=115200″
GRUB_CMDLINE_LINUX=”console=tty0 crashkernel=auto console=ttyS0,115200 rootflags=uquota”
GRUB_DISABLE_RECOVERY=”true”

 

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] 

 

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