[系统运维]云盘构建LVM linux 持续更新

云盘构建LVM并挂载

1. 查看当前磁盘使用情况
   

当前有一块/dev/vdb是未使用的磁盘

2. 生成一个物理卷

[yingjian@iZwz9b8x8l2oe511fss4qfZ data]$ sudo pvcreate /dev/vdb
  Physical volume "/dev/vdb" successfully created.

查看pv物理卷详细信息

3. 生成一个卷组

[yingjian@iZwz9b8x8l2oe511fss4qfZ data]$ sudo vgcreate elk_vg /dev/vdb
  Volume group "elk_vg" successfully created

查看卷组详细信息

4. 生成一个逻辑卷

[yingjian@iZwz9b8x8l2oe511fss4qfZ data]$ sudo lvcreate -l 25599 -n lv_elk elk_vg
  Logical volume "lv_elk" created.

5. 创建文件系统

[yingjian@iZwz9b8x8l2oe511fss4qfZ data]$ sudo mkfs.xfs /dev/elk_vg/lv_elk
meta-data=/dev/elk_vg/lv_elk     isize=512    agcount=4, agsize=6553344 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0, sparse=0
data     =                       bsize=4096   blocks=26213376, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal log           bsize=4096   blocks=12799, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0

6. 迁移挂载目录数据并挂载

sudo mkdir /databackup
sudo cp -ar /data/* /databackup  #本地备份数据
sudo mount /dev/elk_vg/lv_elk /data
[yingjian@iZwz9b8x8l2oe511fss4qfZ data]$ df -Th
Filesystem                Type      Size  Used Avail Use% Mounted on
devtmpfs                  devtmpfs   16G     0   16G   0% /dev
tmpfs                     tmpfs      16G     0   16G   0% /dev/shm
tmpfs                     tmpfs      16G  1.1M   16G   1% /run
tmpfs                     tmpfs      16G     0   16G   0% /sys/fs/cgroup
/dev/vda1                 ext4       99G  6.5G   88G   7% /
tmpfs                     tmpfs     3.1G     0  3.1G   0% /run/user/0
tmpfs                     tmpfs     3.1G     0  3.1G   0% /run/user/1000
/dev/mapper/elk_vg-lv_elk xfs       100G   33M  100G   1% /data

sudo cp -ar /databackup/* /data  #还原数据

7. 永久挂载

[yingjian@iZwz9b8x8l2oe511fss4qfZ data]$ sudo tail -n 1 /etc/fstab 
/dev/elk_vg/lv_elk	/data	xfs	defaults 0 0

本文参考：https://blog.csdn.net/yunqiinsight/article/details/91364007

新加云盘并扩展LVM

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