作用

限制用户或组对磁盘空间的使用,例如文件服务器,邮件服务器.web服务器......

配置磁盘配额

lv的创建

首先创建一个pv

[root@localhost /]# pvcreate /dev/sdb

Physical volume "/dev/sdb" successfully created.

创建一个vg1

[root@localhost /]# vgcreate vg1 /dev/sdb

Volume group "vg1" successfully created

创建一个lv并赋额1000M

[root@localhost /]# lvcreate -L 1000M -n lv1 vg1

Logical volume "lv1" created.

格式化lv1

[root@localhost /]# mkfs.ext4 /dev/vg1/lv1

mke2fs 1.42.9 (28-Dec-2013)

Filesystem label=

OS type: Linux

Block size=4096 (log=2)

Fragment size=4096 (log=2)

Stride=0 blocks, Stripe width=0 blocks

64000 inodes, 256000 blocks

12800 blocks (5.00%) reserved for the super user

First data block=0

Maximum filesystem blocks=262144000

8 block groups

32768 blocks per group, 32768 fragments per group

8000 inodes per group

Superblock backups stored on blocks:

32768, 98304, 163840, 229376

Allocating group tables: done

Writing inode tables: done

Creating journal (4096 blocks): done

Writing superblocks and filesystem accounting information: done

挂载分区,测试分区是否正常

[root@localhost /]# mkdir /lv1 && mount /dev/vg1/lv1 /lv1

[root@localhost /]# cd lv1/

[root@localhost lv1]# ls

lost+found //证明已经成功挂载

开启磁盘配额

执行下面的命令开启quota功能

[root@localhost ~]# mount /dev/vg1/lv1 /lv1

[root@localhost ~]# mount -o remount,usrquota,grpquota /dev/vg1/lv1

查看quota是否正常开启

[root@localhost ~]# mount| grep quota|grep lv

/dev/mapper/vg1-lv1 on /lv1 type ext4 (rw,relatime,quota,usrquota,grpquota,data=ordered)

创建用户和组

[root@localhost ~]# useradd u1 && groupadd z1

[root@localhost ~]# gpasswd -a u1 z1

Adding user u1 to group z1

生成quota配置文件

关闭SeLinux

[root@localhost ~]# setenforce 0

setenforce: SELinux is disabled

生成配置文件

[root@localhost /]# cd lv1 && quotacheck -acug

[root@localhost lv1]# ls

aquota.group aquota.user lost+found

启动quota功能

[root@localhost lv1]# quotaon /dev/vg1/lv1

修改quota配置文件

[root@localhost lv1]# edquota -u u1

Disk quotas for user u1 (uid 1000):

Filesystem blocks soft hard inodes soft hard

/dev/mapper/vg1-lv1 0 0 0 0 0 0

通过修改soft和hard的值,限制其写入文件的大小

[root@localhost lv1]# edquota -u u1

Disk quotas for user u1 (uid 1000):

Filesystem blocks soft hard inodes soft hard

/dev/mapper/vg1-lv1 0 1000 1200 0 0 0

切换成u1用户后,进行写文件测试

[u1@localhost test]$ ll

total 0

-rw-rw-r-- 1 u1 u1 0 Apr 7 16:19 1

[u1@localhost test]$ dd if=/dev/zero of=./1 bs=1M

dm-2: warning, user block quota exceeded.

dm-2: write failed, user block limit reached.

dd: error writing ‘./1’: Disk quota exceeded

2+0 records in

1+0 records out

1331200 bytes (1.3 MB) copied, 0.00222401 s, 599 MB/s

[u1@localhost test]$ ll

total 1300

-rw-rw-r-- 1 u1 u1 1331200 Apr 7 16:19 1

[u1@localhost test]$ dd if=/dev/zero of=./1 bs=2M

dm-2: warning, user block quota exceeded.

dm-2: write failed, user block limit reached.

dd: error writing ‘./1’: Disk quota exceeded

1+0 records in

0+0 records out

1331200 bytes (1.3 MB) copied, 0.0649324 s, 20.5 MB/s

[u1@localhost test]$ ll

total 1300

-rw-rw-r-- 1 u1 u1 1331200 Apr 7 16:20 1

出现明显的超出磁盘配额信息,则针对u1的磁盘配额生效.