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19_划分LVM逻辑卷

1.安装包
yum -y install lvm2
2.创建卷组

# 1. 查看所有的vdb盘
[root@stream9 ~]# lsblk
NAME   MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
vda    253:0    0  20G  0 disk
└─vda1 253:1    0  20G  0 part /
vdb    253:16   0  10G  0 disk
├─vdb1 253:17   0   2G  0 part
├─vdb2 253:18   0   3G  0 part
└─vdb3 253:19   0   5G  0 part
[root@stream9 ~]#

# 2. 创建卷组 vg => volume group vg1
[root@stream9 ~]# vgcreate vg1 /dev/vdb[2-3]
  Physical volume "/dev/vdb2" successfully created.
  Physical volume "/dev/vdb3" successfully created.
  Creating devices file /etc/lvm/devices/system.devices
  Volume group "vg1" successfully created
[root@stream9 ~]#

# 3. 查看卷组
[root@stream9 ~]# vgs
  VG  #PV #LV #SN Attr   VSize VFree
  vg1   2   0   0 wz--n- 7.99g 7.99g
[root@stream9 ~]#

# 4. 根据卷组 创建 逻辑卷 lv1 => logical volume
[root@stream9 ~]#  lvcreate -L 4G -n lv1 vg1
  Logical volume "lv1" created.
[root@stream9 ~]#

#  再次查看卷组
[root@stream9 ~]# vgs
  VG  #PV #LV #SN Attr   VSize VFree
  vg1   2   1   0 wz--n- 7.99g 3.99g
[root@stream9 ~]#

# 5. 查看逻辑卷
[root@stream9 ~]# lvs
  LV   VG  Attr       LSize Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  lv1  vg1 -wi-a----- 4.00g
[root@stream9 ~]#
[root@stream9 ~]# lsblk
NAME        MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
vda         253:0    0  20G  0 disk
└─vda1      253:1    0  20G  0 part /
vdb         253:16   0  10G  0 disk
├─vdb1      253:17   0   2G  0 part
├─vdb2      253:18   0   3G  0 part
└─vdb3      253:19   0   5G  0 part
  └─vg1-lv1 252:0    0   4G  0 lvm
[root@stream9 ~]# blkid
/dev/vda1: UUID="c3506e82-5c52-4fd1-aeeb-df31262e5dfd" TYPE="xfs" PARTUUID="c409ea87-01"
/dev/vdb2: UUID="3dk087-NPav-68qn-6w2A-SViD-bPuY-DBoq3t" TYPE="LVM2_member" PARTUUID="dd73c5e9-02"
/dev/vdb3: UUID="U0pcXJ-mKhE-9CdD-r83b-uMf2-3L3s-jeS0vV" TYPE="LVM2_member" PARTUUID="dd73c5e9-03"
/dev/vdb1: PARTUUID="dd73c5e9-01"

# 6. 格式化逻辑卷挂载
[root@stream9 ~]# lsblk
NAME        MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
vda         253:0    0  20G  0 disk
└─vda1      253:1    0  20G  0 part /
vdb         253:16   0  10G  0 disk
├─vdb1      253:17   0   2G  0 part
├─vdb2      253:18   0   3G  0 part
└─vdb3      253:19   0   5G  0 part
  └─vg1-lv1 252:0    0   4G  0 lvm
[root@stream9 ~]#
[root@stream9 ~]# mkfs.ext4 /dev/vg1/lv1
mke2fs 1.46.5 (30-Dec-2021)
Discarding device blocks: done
Creating filesystem with 1048576 4k blocks and 262144 inodes
Filesystem UUID: 61bcc5ac-94c6-4772-8f34-535f2f99ca68
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736

Allocating group tables: done
Writing inode tables: done
Creating journal (16384 blocks): done
Writing superblocks and filesystem accounting information: done

[root@stream9 ~]# blkid
/dev/vda1: UUID="c3506e82-5c52-4fd1-aeeb-df31262e5dfd" TYPE="xfs" PARTUUID="c409ea87-01"
/dev/vdb2: UUID="3dk087-NPav-68qn-6w2A-SViD-bPuY-DBoq3t" TYPE="LVM2_member" PARTUUID="dd73c5e9-02"
/dev/vdb3: UUID="U0pcXJ-mKhE-9CdD-r83b-uMf2-3L3s-jeS0vV" TYPE="LVM2_member" PARTUUID="dd73c5e9-03"
/dev/vdb1: PARTUUID="dd73c5e9-01"
/dev/mapper/vg1-lv1: UUID="61bcc5ac-94c6-4772-8f34-535f2f99ca68" TYPE="ext4"
[root@stream9 ~]#
[root@stream9 ~]# mkdir /mnt/test1
[root@stream9 ~]# mount /dev/vg1/lv1 /mnt/test1
[root@stream9 ~]#
[root@stream9 ~]# df -h
Filesystem           Size  Used Avail Use% Mounted on
devtmpfs             4.0M     0  4.0M   0% /dev
tmpfs                889M     0  889M   0% /dev/shm
tmpfs                356M  464K  356M   1% /run
/dev/vda1             20G  2.8G   18G  14% /
tmpfs                178M  4.0K  178M   1% /run/user/0
/dev/mapper/vg1-lv1  3.9G   24K  3.7G   1% /mnt/test1

# 7. 扩容逻辑卷
[root@stream9 ~]# lvs
  LV   VG  Attr       LSize Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  lv1  vg1 -wi-ao---- 4.00g
[root@stream9 ~]#
[root@stream9 ~]# vgs
  VG  #PV #LV #SN Attr   VSize VFree
  vg1   2   1   0 wz--n- 7.99g 3.99g
[root@stream9 ~]#
[root@stream9 ~]# lvs
  LV   VG  Attr       LSize Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  lv1  vg1 -wi-ao---- 4.00g
[root@stream9 ~]#
[root@stream9 ~]# lvextend -L 6G /dev/vg1/lv1
  Size of logical volume vg1/lv1 changed from 4.00 GiB (1024 extents) to 6.00 GiB (1536 extents).
  Logical volume vg1/lv1 successfully resized.
[root@stream9 ~]#
[root@stream9 ~]# vgs
  VG  #PV #LV #SN Attr   VSize VFree
  vg1   2   1   0 wz--n- 7.99g 1.99g
[root@stream9 ~]#
[root@stream9 ~]# lvs
  LV   VG  Attr       LSize Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  lv1  vg1 -wi-ao---- 6.00g
[root@stream9 ~]#
[root@stream9 ~]# df -h
Filesystem           Size  Used Avail Use% Mounted on
devtmpfs             4.0M     0  4.0M   0% /dev
tmpfs                889M     0  889M   0% /dev/shm
tmpfs                356M  464K  356M   1% /run
/dev/vda1             20G  2.8G   18G  14% /
tmpfs                178M  4.0K  178M   1% /run/user/0
/dev/mapper/vg1-lv1  3.9G   24K  3.7G   1% /mnt/test1
[root@stream9 ~]#
# 刷新xfs文件系统: xfs_growfs
# 刷新ext4文件系统: resize2fs
[root@stream9 ~]# resize2fs /dev/vg1/lv1
resize2fs 1.46.5 (30-Dec-2021)
Filesystem at /dev/vg1/lv1 is mounted on /mnt/test1; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 1
The filesystem on /dev/vg1/lv1 is now 1572864 (4k) blocks long.

[root@stream9 ~]# df -h
Filesystem           Size  Used Avail Use% Mounted on
devtmpfs             4.0M     0  4.0M   0% /dev
tmpfs                889M     0  889M   0% /dev/shm
tmpfs                356M  464K  356M   1% /run
/dev/vda1             20G  2.8G   18G  14% /
tmpfs                178M  4.0K  178M   1% /run/user/0
/dev/mapper/vg1-lv1  5.9G   24K  5.6G   1% /mnt/test1

[root@stream9 ~]# lsblk
NAME        MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
vda         253:0    0  20G  0 disk
└─vda1      253:1    0  20G  0 part /
vdb         253:16   0  10G  0 disk
├─vdb1      253:17   0   2G  0 part
├─vdb2      253:18   0   3G  0 part
│ └─vg1-lv1 252:0    0   6G  0 lvm  /mnt/test1
└─vdb3      253:19   0   5G  0 part
  └─vg1-lv1 252:0    0   6G  0 lvm  /mnt/test1

# 8. 扩容卷组 vg
[root@stream9 ~]# vgs
  VG  #PV #LV #SN Attr   VSize VFree
  vg1   2   1   0 wz--n- 7.99g 1.99g
[root@stream9 ~]#
[root@stream9 ~]# vgextend vg1  /dev/vdb1
  Physical volume "/dev/vdb1" successfully created.
  Volume group "vg1" successfully extended
[root@stream9 ~]#
[root@stream9 ~]# vgs
  VG  #PV #LV #SN Attr   VSize  VFree
  vg1   3   1   0 wz--n- <9.99g <3.99g

# 9. 查看
[root@stream9 ~]# lvs
  LV   VG  Attr       LSize Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  lv1  vg1 -wi-ao---- 6.00g
[root@stream9 ~]#
[root@stream9 ~]# vgs
  VG  #PV #LV #SN Attr   VSize  VFree
  vg1   3   1   0 wz--n- <9.99g <3.99g
[root@stream9 ~]#
[root@stream9 ~]# pvs    # physical volume
  PV         VG  Fmt  Attr PSize  PFree
  /dev/vdb1  vg1 lvm2 a--  <2.00g <2.00g
  /dev/vdb2  vg1 lvm2 a--  <3.00g  1.99g
  /dev/vdb3  vg1 lvm2 a--  <5.00g     0

  # 10. 删除逻辑卷和卷组
  [root@stream9 ~]# df -h
Filesystem           Size  Used Avail Use% Mounted on
devtmpfs             4.0M     0  4.0M   0% /dev
tmpfs                889M     0  889M   0% /dev/shm
tmpfs                356M  464K  356M   1% /run
/dev/vda1             20G  2.8G   18G  14% /
tmpfs                178M  4.0K  178M   1% /run/user/0
/dev/mapper/vg1-lv1  5.9G   24K  5.6G   1% /mnt/test1
[root@stream9 ~]#
[root@stream9 ~]# umount /mnt/test1
[root@stream9 ~]#
[root@stream9 ~]# lvs
  LV   VG  Attr       LSize Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  lv1  vg1 -wi-a----- 6.00g
[root@stream9 ~]#
[root@stream9 ~]# lvremove /dev/vg1/lv1
Do you really want to remove active logical volume vg1/lv1? [y/n]: y
  Logical volume "lv1" successfully removed.
[root@stream9 ~]#
[root@stream9 ~]# lvs
[root@stream9 ~]# lsblk
NAME   MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
vda    253:0    0  20G  0 disk
└─vda1 253:1    0  20G  0 part /
vdb    253:16   0  10G  0 disk
├─vdb1 253:17   0   2G  0 part
├─vdb2 253:18   0   3G  0 part
└─vdb3 253:19   0   5G  0 part
[root@stream9 ~]#
[root@stream9 ~]# vgs
  VG  #PV #LV #SN Attr   VSize  VFree
  vg1   3   0   0 wz--n- <9.99g <9.99g
[root@stream9 ~]# vgremove vg1
  Volume group "vg1" successfully removed
[root@stream9 ~]# vgs
[root@stream9 ~]#
[root@stream9 ~]# pvs
  PV         VG Fmt  Attr PSize  PFree
  /dev/vdb1     lvm2 ---   2.00g  2.00g
  /dev/vdb2     lvm2 ---   3.00g  3.00g
  /dev/vdb3     lvm2 ---  <5.00g <5.00g
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