Set Disk Quota2015/10/20 |
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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. |
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| [1] | Enable Quota to add mount options. |
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[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
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| [2] | Set user Quota. For example, Apply quota to "cent" user. |
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# 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 [------]
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| [3] | If you set group quota, do like follows. |
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# possible to set on non-interactive mode [root@dlp ~]# xfs_quota -x -c 'limit -g bsoft=9g bhard=10g cent' /home
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 [------]
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| [4] | It's possible to send warnings to use Warnquota. This setting needs SMTP server on your server. |
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[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
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