chapter07 LVM逻辑卷

r囧r小猫 2021-10-29 07:04 338阅读 0赞

1．为主机增加80G SCSI 接口硬盘

![1737808-20190801203542068-2024574459.png][]

2．划分三个各20G的主分区

![1737808-20190801203930291-1114738189.png][]

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**

**/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

转载于:https://www.cnblogs.com/tanxiaojuncom/p/11285649.html

[1737808-20190801203542068-2024574459.png]: /images/20211029/3553f44a355348a8ad535dd3db4a751e.png
[1737808-20190801203930291-1114738189.png]: /images/20211029/1259f589e6fd4b4e8e545d6be376333e.png