Linux系统中对磁盘配额(Quota),软阵列(RAID)的实现

Linux系统中对磁盘配额(Quota),软阵列(RAID)的实现

1.创建测试的用户和修改挂载的参数
[root@localhost ~]# useradd user1    --新建两个用户
[root@localhost ~]# useradd  user2
[root@localhost ~]# mount -o remount,usrquota,grpquota /mnt/sdb  --重新挂载，加参数
[root@localhost ~]# mount -l  --查看挂载选项
/dev/mapper/VolGroup-lv_root on / type ext4 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw,rootcontext="system_u:object_r:tmpfs_t:s0")
/dev/sda1 on /boot type ext4 (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
/dev/sdb1 on /mnt/sdb type ext4 (rw,usrquota,grpquota)
[root@localhost ~]# quotacheck  -avug -mf  --生成两个quota文件
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/sdb1 [/mnt/sdb] done
quotacheck: Cannot stat old user quota file: No such file or directory
quotacheck: Cannot stat old group quota file: No such file or directory
quotacheck: Cannot stat old user quota file: No such file or directory
quotacheck: Cannot stat old group quota file: No such file or directory
quotacheck: Checked 2 directories and 0 files
quotacheck: Old file not found.
quotacheck: Old file not found.
[root@localhost ~]# ll /mnt/sdb    --查看生成的两个文件
total 26
-rw-------. 1 root root  6144 Jan  9 17:59 aquota.group
-rw-------. 1 root root  6144 Jan  9 17:59 aquota.user
drwx------. 2 root root 12288 Jan  9 17:55 lost+found
[root@localhost ~]# quotaon  -avug  --开启quota功能
/dev/sdb1 [/mnt/sdb]: group quotas turned on
/dev/sdb1 [/mnt/sdb]: user quotas turned on
[root@localhost ~]# edquota -u user1
Disk quotas for user user1 (uid 500):
Filesystem                blocks      soft      hard    inodes    soft    hard
/dev/sdb1                  0            10        20          0        0        0
[root@localhost ~]# edquota -u user2
Disk quotas for user user2 (uid 501):
Filesystem                blocks      soft      hard    inodes    soft    hard
/dev/sdb1                  0            5        10          0        0        0

[root@localhost ~]# useradd user1    --新建两个用户
[root@localhost ~]# useradd  user2
[root@localhost ~]# mount -o remount,usrquota,grpquota /mnt/sdb  --重新挂载，加参数
[root@localhost ~]# mount -l  --查看挂载选项
/dev/mapper/VolGroup-lv_root on / type ext4 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw,rootcontext="system_u:object_r:tmpfs_t:s0")
/dev/sda1 on /boot type ext4 (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
/dev/sdb1 on /mnt/sdb type ext4 (rw,usrquota,grpquota)
[root@localhost ~]# quotacheck  -avug -mf  --生成两个quota文件
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/sdb1 [/mnt/sdb] done
quotacheck: Cannot stat old user quota file: No such file or directory
quotacheck: Cannot stat old group quota file: No such file or directory
quotacheck: Cannot stat old user quota file: No such file or directory
quotacheck: Cannot stat old group quota file: No such file or directory
quotacheck: Checked 2 directories and 0 files
quotacheck: Old file not found.
quotacheck: Old file not found.
[root@localhost ~]# ll /mnt/sdb    --查看生成的两个文件
total 26
-rw-------. 1 root root  6144 Jan  9 17:59 aquota.group
-rw-------. 1 root root  6144 Jan  9 17:59 aquota.user
drwx------. 2 root root 12288 Jan  9 17:55 lost+found
[root@localhost ~]# quotaon  -avug  --开启quota功能
/dev/sdb1 [/mnt/sdb]: group quotas turned on
/dev/sdb1 [/mnt/sdb]: user quotas turned on
[root@localhost ~]# edquota -u user1    --用户user1使用/mnt/sdb目录不要起过20M
Disk quotas for user user1 (uid 500):
Filesystem                blocks      soft      hard    inodes    soft    hard
/dev/sdb1                  0            10000        20000          0        0        0
[root@localhost ~]# edquota -u user2  --用户user2对sdb目录不要超过10M，大于5M超出指定时间删除
Disk quotas for user user2 (uid 501):
Filesystem                blocks      soft      hard    inodes    soft    hard
/dev/sdb1                  0            5000        10000          0        0        0

2.验证配额
[root@localhost ~]# su - user1
[user1@localhost ~]$ cd /mnt/sdb
[user1@localhost sdb]$ dd if=/dev/zero of=12 bs=1M count=5  --创建5M的文件没有警告信息,正常
5+0 records in
5+0 records out
5242880 bytes (5.2 MB) copied, 0.0525754 s, 99.7 MB/s
[user1@localhost sdb]$ ll -h 12
-rw-rw-r--. 1 user1 user1 5.0M Jan  9 18:16 12
[user1@localhost sdb]$ dd if=/dev/zero of=123 bs=1M count=21  --创建12M的文件有警告信息，表示失败
sdb1: warning, user block quota exceeded.
sdb1: write failed, user block limit reached.
dd: writing `123': Disk quota exceeded
20+0 records in
19+0 records out
20475904 bytes (20 MB) copied, 0.20094 s, 102 MB/s
[user1@localhost sdb]$ ll -h 123
-rw-rw-r--. 1 user1 user1 0 Jan  9 18:17 123
[user1@localhost sdb]$ exit
logout
[root@localhost ~]# su - user2    --用户user2测试
[user2@localhost ~]$ cd /mnt/sdb
[user2@localhost sdb]$ dd if=/dev/zero of=23 bs=1M count=8  --写入8M文件成功
sdb1: warning, user block quota exceeded.
8+0 records in
8+0 records out
8388608 bytes (8.4 MB) copied, 0.0923618 s, 90.8 MB/s
[user2@localhost sdb]$ ll -h 23      --查看文件大小
-rw-rw-r--. 1 user2 user2 8.0M Jan  9 18:23 23
[user2@localhost sdb]$
[user2@localhost sdb]$ dd if=/dev/zero of=23 bs=1M count=11  --写入11M文件失败
sdb1: warning, user block quota exceeded.
sdb1: write failed, user block limit reached.
dd: writing `23': Disk quota exceeded
10+0 records in
9+0 records out
10235904 bytes (10 MB) copied, 0.106298 s, 96.3 MB/s
[user2@localhost sdb]$

3.查看quota配置,修改警告时间,取消quota
[root@localhost ~]# quota -vu user1 user2    --查找指定的用户quota信息
Disk quotas for user user1 (uid 500):
Filesystem  blocks  quota  limit  grace  files  quota  limit  grace
/dev/sdb1      0  10000  20000              0      0      0
Disk quotas for user user2 (uid 501):
Filesystem  blocks  quota  limit  grace  files  quota  limit  grace
/dev/sdb1    8193*  5000  10000  6days      1      0      0
[root@localhost ~]# repquota -av    --所有用户和quota信息
*** Report for user quotas on device /dev/sdb1
Block grace time: 7days; Inode grace time: 7days
Block limits                File limits
User            used    soft    hard  grace    used  soft  hard  grace
----------------------------------------------------------------------
root      --      13      0      0              2    0    0
user1    --      0  10000  20000              0    0    0
user2    +-    8193    5000  10000  6days      1    0    0
Statistics:
Total blocks: 7
Data blocks: 1
Entries: 3
Used average: 3.000000
[root@localhost ~]# edquota  -t  --修改文件警告天数(Block  天数  Inode  天数)
Grace period before enforcing soft limits for users:
Time units may be: days, hours, minutes, or seconds
Filesystem            Block grace period    Inode grace period
/dev/sdb1                    7days                  7days
[root@localhost ~]# vim /etc/warnquota.conf    --查看警告信息
[root@localhost ~]# quotaoff  /mnt/sdb        --关闭quota功能

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