LVM卷的搭建

1.物理盘加入pv，也可以是分区加入pv

[root@localhost ~]# pvcreate /dev/sdb
  Physical volume "/dev/sdb" successfully created.

2. 创建vg ，将加入pv的磁盘加入到vg

[root@localhost ~]# vgcreate vg0 /dev/sdb
  Volume group "vg0" successfully created

3. 创建lv，

[root@localhost ~]# lvcreate -L 49G -n lv0 vg0
  Logical volume "lv0" created.

4. 格式化卷

[root@localhost ~]# mkfs.xfs /dev/vg0/lv0 
meta-data=/dev/vg0/lv0           isize=512    agcount=4, agsize=3211264 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=1, sparse=1, rmapbt=0
         =                       reflink=1    bigtime=0 inobtcount=0
data     =                       bsize=4096   blocks=12845056, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0, ftype=1
log      =internal log           bsize=4096   blocks=6272, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0

5. 挂载分区

查看uuid

[root@localhost ~]# blkid 
/dev/sdb: UUID="ULd1WI-NMcQ-i730-6fN2-sVtn-jFx0-08sYXQ" TYPE="LVM2_member"
/dev/sr0: BLOCK_SIZE="2048" UUID="2022-03-30-08-44-34-00" LABEL="openEuler-22.03-LTS-x86_64" TYPE="iso9660" PTUUID="22bdc5ef" PTTYPE="dos"
/dev/mapper/vg0-lv0: UUID="8e7dee62-ddc5-4683-92a0-3ce6115a046d" BLOCK_SIZE="512" TYPE="xfs"
/dev/sda2: UUID="24c9fb91-060e-479b-a80b-fbf98253deda" BLOCK_SIZE="512" TYPE="xfs" PARTUUID="8a9062cd-02"
/dev/sda1: UUID="33281a3c-56fa-4294-9619-71dd5af4c981" BLOCK_SIZE="1024" TYPE="ext4" PARTUUID="8a9062cd-01"

编辑fstab

vim /etc/fstab

UUID=24c9fb91-060e-479b-a80b-fbf98253deda /                       xfs     defaults        0 0
UUID=33281a3c-56fa-4294-9619-71dd5af4c981 /boot                   ext4    defaults        1 2
UUID=8e7dee62-ddc5-4683-92a0-3ce6115a046d /t1   xfs defaults 0 0

查看挂载分区

[root@localhost ~]# mount -a
[root@localhost ~]# df -lh
文件系统             容量  已用  可用 已用% 挂载点
devtmpfs             7.6G     0  7.6G    0% /dev
tmpfs                7.6G   12K  7.6G    1% /dev/shm
tmpfs                3.1G   18M  3.1G    1% /run
tmpfs                4.0M     0  4.0M    0% /sys/fs/cgroup
/dev/sda2            200G  9.2G  191G    5% /
tmpfs                7.6G     0  7.6G    0% /tmp
/dev/sda1            459M   86M  344M   20% /boot
overlay              200G  9.2G  191G    5% /var/lib/docker/overlay2/205d8836d958808ad56ebd7d8c386c690fc3941cb0dec0d158b2912473b869d6/merged
overlay              200G  9.2G  191G    5% /var/lib/docker/overlay2/695806dc7f5f54f6759ebd9f7ec58abd3615284c838260db3e2015044a97c317/merged
/dev/mapper/vg0-lv0   49G  382M   49G    1% /t1

lvm 扩容

1. 新磁盘加pv

[root@localhost ~]# pvcreate /dev/sdc 
  Physical volume "/dev/sdc" successfully created.

2. vg添加磁盘

[root@localhost ~]# vgextend vg0 /dev/sdc
  Volume group "vg0" successfully extended

3. lv扩容

[root@localhost ~]# lvextend -L +20G /dev/vg0/lv0 
  Size of logical volume vg0/lv0 changed from 49.00 GiB (12544 extents) to 69.00 GiB (17664 extents).
  Logical volume vg0/lv0 successfully resized.

4. 文件系统拉伸

ext4 用一下命令拉伸

resize2fs/dev/vg0//lv0

xfs 使用如下命令拉伸

xfs_growfs /dev/vg0/lv0
meta-data=/dev/mapper/vg0-lv0    isize=512    agcount=4, agsize=3211264 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=1, sparse=1, rmapbt=0
         =                       reflink=1    bigtime=0 inobtcount=0
data     =                       bsize=4096   blocks=12845056, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0, ftype=1
log      =internal log           bsize=4096   blocks=6272, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 12845056 to 18087936

[root@localhost ~]# df -lh
文件系统             容量  已用  可用 已用% 挂载点
devtmpfs             7.6G     0  7.6G    0% /dev
tmpfs                7.6G   12K  7.6G    1% /dev/shm
tmpfs                3.1G   18M  3.1G    1% /run
tmpfs                4.0M     0  4.0M    0% /sys/fs/cgroup
/dev/sda2            200G  9.2G  191G    5% /
tmpfs                7.6G     0  7.6G    0% /tmp
/dev/sda1            459M   86M  344M   20% /boot
overlay              200G  9.2G  191G    5% /var/lib/docker/overlay2/205d8836d958808ad56ebd7d8c386c690fc3941cb0dec0d158b2912473b869d6/merged
overlay              200G  9.2G  191G    5% /var/lib/docker/overlay2/695806dc7f5f54f6759ebd9f7ec58abd3615284c838260db3e2015044a97c317/merged
/dev/mapper/vg0-lv0   69G  525M   69G    1% /t1