Bright:Setup user quotas
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- Lets apply user quotas to /home on a Bright headnode
- Running Centos 6.5
- Applying qoutas to an EXT3 filesystem
- More details and explanations here: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Storage_Administration_Guide/ch-disk-quotas.html
- The package quota should be installed (is installed by default on bright)
Setup quotas within /etc/fstab
- Need to add usrquota,grpquota to the /etc/fstab file for the home dir mount point
- Lets check the home mount point (in this instance its just / for bright)
[root@trainning ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/md126 426G 14G 392G 4% /
tmpfs 16G 84K 16G 1% /dev/shm
/dev/md125 496M 24M 447M 6% /boot- Lets update the /etc/fstab file with the parameters usrquota,grpquota for user mount points.
[root@trainning ~]# cat /etc/fstab
UUID=9586a511-9b87-48e1-8749-f5fa0ebabd01 / ext3 defaults,noatime,nodiratime,usrquota,grpquota 0 1
UUID=6b542d80-a228-47bc-9e39-831f37bc074c /boot ext2 defaults,noatime,nodiratime 0 2
UUID=5e9078a4-9975-4659-839f-9749ceb8ab02 swap swap defaults 0 0
proc /proc proc defaults,nosuid 0 0
sysfs /sys sysfs noauto 0 0
devpts /dev/pts devpts mode=0620,gid=5 0 0
tmpfs /dev/shm tmpfs defaults 0 0
# This section of this file was automatically generated by cmd. Do not edit manually!
# BEGIN AUTOGENERATED SECTION -- DO NOT REMOVE
# END AUTOGENERATED SECTION -- DO NOT REMOVE- Remount the filesystem and verify the args in mtab
[root@trainning ~]# mount -o remount /
[root@trainning ~]# cat /etc/mtab
/dev/md126 / ext3 rw,noatime,nodiratime,usrquota,grpquota 0 0
proc /proc proc rw,nosuid 0 0
sysfs /sys sysfs rw 0 0
devpts /dev/pts devpts rw,mode=0620,gid=5 0 0
tmpfs /dev/shm tmpfs rw 0 0
/dev/md125 /boot ext2 rw,noatime,nodiratime 0 0
none /proc/sys/fs/binfmt_misc binfmt_misc rw 0 0
sunrpc /var/lib/nfs/rpc_pipefs rpc_pipefs rw 0 0
nfsd /proc/fs/nfsd nfsd rw 0 0
gvfs-fuse-daemon /root/.gvfs fuse.gvfs-fuse-daemon rw,nosuid,nodev 0 0Create the Quota Database
- Note: For Bright because the / folder is used and cannot be mounted read-only, we needed for force the initial check
- Note: This took a few mins to run
- Perform an initial check of the system
[root@trainning ~]# quotacheck -cug /
quotacheck: Cannot remount filesystem mounted on / read-only so counted values might not be right.
Please stop all programs writing to filesystem or use -m flag to force checking.
[root@trainning ~]# quotacheck -cugm /- After the files are created, run the following command to generate the table of current disk usage per file system with quotas enabled:
[root@trainning ~]# quotacheck -avugm
quotacheck: Your kernel probably supports journaled quota but you are not using it. Consider switching to journaled quota to avoid running quotacheck after an unclean shutdown.
quotacheck: Scanning /dev/md126 [/] done
quotacheck: Checked 24615 directories and 249780 filesSet a user quota
- Use the edquota command. We'll need to set soft and hard limits here. The number are based on KB so scale up for GB
- E.g. 5GB limit
[david@hairybacon-2 ~]$ echo "5 * 1024 * 1024" | bc
5242880- Set the limit using 5242880
[root@trainning ~]# edquota david
# which will provide you with a vi screen with the following, edit numbers as below
Disk quotas for user david (uid 1003):
Filesystem blocks soft hard inodes soft hard
/dev/md126 60 5242880 5242880 15 0 0- Turn quotas on
$ quotaon -aVerify the user quota
- check using the quota command
[root@trainning ~]# edquota -u david -f /
[root@trainning ~]# quota -u david
Disk quotas for user david (uid 1003):
Filesystem blocks quota limit grace files quota limit grace
/dev/md126 60 5242880 5242880 15 0 0- TBC created file, met limits, removed files, says limit exceeded!?