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.