Set Disk Quota

Set Disk Quota 2015/10/20

	Limit amount of disk usage to set Disk Quota. For example on here, Set Quota on /home which is XFS formatted.  For settings of ext4, refer to here.
[1]	Enable Quota to add mount options.

[root@dlp ~]#  umount /home  [root@dlp ~]#  mount -o uquota,gquota /dev/sdb1 /home [root@dlp ~]#  vi /etc/fstab # add options /dev/mapper/centos-root / xfs defaults 0 0 UUID=c4df086e-3699-4e02-b7cf /boot xfs defaults 0 0 /dev/mapper/centos-swap swap swap defaults 0 0 /dev/sdb1 /home xfs defaults,uquota,gquota 0 0

[2]	Set user Quota. For example, Apply quota to "cent" user.

# run quota tool with expert mode [root@dlp ~]#  xfs_quota -x /home # show current status xfs_quota>  state  User quota state on /home (/dev/sdb1) Accounting: ON Enforcement: ON Inode: #136 (2 blocks, 2 extents) Group quota state on /home (/dev/sdb1) Accounting: ON Enforcement: ON Inode: #137 (2 blocks, 2 extents) Project quota state on /home (/dev/sdb1) Accounting: OFF Enforcement: OFF Inode: #137 (2 blocks, 2 extents) Blocks grace time: [7 days 00:00:30] Inodes grace time: [7 days 00:00:30] Realtime Blocks grace time: [7 days 00:00:30] # show usage reports xfs_quota>  report -h  User quota on /home (/dev/sdb1) Blocks User ID Used Soft Hard Warn/Grace ---------- --------------------------------- root 0 0 0 00 [------] cent 16K 0 0 00 [------] Group quota on /home (/dev/sdb1) Blocks Group ID Used Soft Hard Warn/Grace ---------- --------------------------------- root 0 0 0 00 [------] cent 16K 0 0 00 [------] # set Soft Limit 9G, Hard Limit 10G (specify with kilo bytes) to "cent" user xfs_quota>  limit bsoft=9g bhard=10g cent # show reports xfs_quota>  report -h -u  User quota on /home (/dev/sdb1) Blocks User ID Used Soft Hard Warn/Grace ---------- --------------------------------- root 0 0 0 00 [------] cent 16K 9G 10G 00 [------]

[3]	If you set group quota, do like follows.

# possible to set on non-interactive mode [root@dlp ~]#  xfs_quota -x -c 'limit -g bsoft=9g bhard=10g cent' /home [root@dlp ~]#  xfs_quota -x -c 'report -h -g' /home  Group quota on /home (/dev/sdb1) Blocks Group ID Used Soft Hard Warn/Grace ---------- --------------------------------- root 0 0 0 00 [------] cent 16K 9G 10G 00 [------]

[4]	It's possible to send warnings to use Warnquota. This setting needs SMTP server on your server.

# install Warnquota [root@dlp ~]#  yum -y install quota-warnquota [root@dlp ~]#  vi /etc/quotatab # add device and description which quota is set /dev/sdb1: Your Home Director # change domain name to your own one [root@dlp ~]#  sed -i -e "s/example\.com/server\.world/g" /etc/warnquota.conf # run warnquota [root@dlp ~]#  warnquota -s # if a user is over the limit when warnquota runs, following warning is sent From root@dlp.srv.world Thu Oct 20 19:08:08 2015 Return-Path: <root@dlp.srv.world> X-Original-To: cent Delivered-To: cent@dlp.srv.world From: root@srv.world Reply-To: root@srv.world Subject: NOTE: You are exceeding your allocated disk space limits To: cent@dlp.srv.world Cc: root@srv.world Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Date: Thu, 20 Oct 2015 19:08:08 +0900 (JST) Status: R Your disk usage has exceeded the agreed limits on this server Please delete any unnecessary files on following filesystems: Your Home Directory (/dev/sdb1) Block limits File limits Filesystem used soft hard grace used soft hard grace /dev/sdb1 +- 4112M 4096M 5120M 6days 6 0 0 root@srv.world