chapter07 LVM逻辑卷

1．为主机增加80G SCSI 接口硬盘

2．划分三个各20G的主分区

3．将三个主分区转换为物理卷（pvcreate），扫描系统中的物理卷

[root@localhost ~]# pvcreate /dev/sdd[123]
  Physical volume "/dev/sdd1" successfully created
  Physical volume "/dev/sdd2" successfully created
  Physical volume "/dev/sdd3" successfully created

 

[root@localhost ~]# pvscan
  PV /dev/sda2   VG centos   lvm2 [39.51 GiB / 44.00 MiB free]
  PV /dev/sdd2               lvm2 [20.00 GiB]
  PV /dev/sdd3               lvm2 [20.00 GiB]
  PV /dev/sdd1               lvm2 [20.00 GiB]

4．使用两个物理卷创建卷组，名字为myvg，查看卷组大小

[root@localhost ~]# vgcreate myvg /dev/sdd[12]
  Volume group "myvg" successfully created
[root@localhost ~]# vgdisplay myvg

5．创建逻辑卷mylv，大小为30G

[root@localhost ~]# lvcreate -L +30G -n mylv myvg
  Logical volume "mylv" created.

 

6．将逻辑卷格式化成xfs文件系统，并挂载到/data目录上，创建文件测试

[root@localhost ~]# mkfs -t xfs /dev/myvg/mylv

[root@localhost ~]#mkdir /data

[root@localhost ~]# cd /data

[root@localhost data]# touch test.txt

[root@localhost ~]# echo "123" > /data/test.txt

[root@localhost ~]# mount /dev/myvg/mylv /data

[root@localhost ~]# cat /data/test.txt
123

 

7．增大逻辑卷到35G

[root@localhost ~]# pvcreate /dev/sdd3

[root@localhost ~]# vgextend myvg /dev/sdd3

[root@localhost ~]# vgdisplay myvg

[root@localhost ~]# lvextend -L +5G /dev/myvg/mylv

 

[root@localhost ~]# lvdisplay /dev/myvg/mylv

[root@localhost ~]# df -Th

[root@localhost ~]# xfs_growfs /dev/myvg/mylv

[root@localhost ~]# df -Th

 

8．编辑/etc/fstab文件挂载逻辑卷，并支持磁盘配额选项

[root@localhost ~]# vim /etc/fstab

/dev/myvg/mylv           /data         xfs     defaults,usrquota,grpquota     0  0

 

9．创建磁盘配额，crushlinux用户在/data目录下文件大小软限制为80M，硬限制为100M，
crushlinux用户在/data目录下文件数量软限制为80个，硬限制为100个。

[root@localhost ~]# mkdir /data1

[root@localhost ~]# mkfs.ext4 /dev/sdd3

[root@localhost ~]# mount /dev/sdd3 /data1

[root@localhost ~]# mount -o remount,usrquota,grpquota /data1

[root@localhost ~]# mount | grep /data1

[root@localhost ~]# vim /etc/fstab

[root@localhost ~]# vim /etc/fstab

/dev/sdd3               /data1             ext4    defaults,usrquota,grpquota    0  0

[root@localhost ~]#quotacheck -avug

[root@localhost ~]#ll /data1/a*
-rw-------. 1 root root 6144 8月   2 20:40 /data1/aquota.group
-rw-------. 1 root root 6144 8月   2 20:40 /data1/aquota.user

[root@localhost ~]# quotaon -auvg
/dev/sdd3 [/data1]: group quotas turned on
/dev/sdd3 [/data1]: user quotas turned on

[root@localhost ~]# useradd crushlinux
[root@localhost ~]# edquota -u crushlinux

/dev/sdd3              0       8000       10000          0      80      100

[root@localhost ~]# chmod -R 777  /data1

[root@localhost ~]# ll /data1

 

 

10．使用touch dd 命令在/data目录下测试

[root@localhost ~]# su crushlinux

[crushlinux@localhost root]$ dd if=/dev/zero of=/data1/ceshi  bs=1M count=90
sdd3: warning, user block quota exceeded.
sdd3: write failed, user block limit reached.
dd: 写入"/data1/ceshi" 出错: 超出磁盘限额
记录了10+0 的读入
记录了9+0 的写出
10240000字节(10 MB)已复制，0.0379932 秒，270 MB/秒

 

[crushlinux@localhost root]$ touch /data1/{1..85}.txt
sdd3: warning, user file quota exceeded.

 

11．查看配额的使用情况：用户角度

[root@localhost ~]# quota -uvs crushlinux
Disk quotas for user crushlinux (uid 8893):
     Filesystem   space   quota   limit   grace   files   quota   limit   grace
      /dev/sdd3  10000K*  8000K  10000K   6days      86*     80     100   6days

 

12．查看配额的使用情况：文件系统角度

[root@localhost ~]# repquota -auvs
*** Report for user quotas on device /dev/sdd3
Block grace time: 7days; Inode grace time: 7days
                        Space limits                File limits
User            used    soft    hard  grace    used  soft  hard  grace
----------------------------------------------------------------------
root      --     20K      0K      0K              2     0     0      
crushlinux ++  10000K   8000K  10000K  6days      86    80   100  6days

Statistics:
Total blocks: 7
Data blocks: 1
Entries: 2
Used average: 2.000000

[crushlinux@localhost root]$ dd if=/dev/zero of=/data1/ceshi  bs=1M count=90
sdd3: warning, user block quota exceeded.
sdd3: write failed, user block limit reached.
dd: 写入"/data1/ceshi" 出错: 超出磁盘限额
记录了10+0 的读入
记录了9+0 的写出
10240000字节(10 MB)已复制，0.0379932 秒，270 MB/秒