LVM 扩容

1，LVM 查看

• 逻辑卷lv

# lvdisplay

• 物理卷卷组vg

# vgdisplay

• 物理卷pv

# pvdisplay

2，LVM 扩容

# lsblk

• 格式化新磁盘

# mkfs.ext4 /dev/sdc

• 新建物理卷PV

# pvcreate /dev/sdc
WARNING: ext4 signature detected on /dev/sdc at offset 1080. Wipe it? [y/n]: y
  Wiping ext4 signature on /dev/sdc.
  Physical volume "/dev/sdc" successfully created.

• 查看物理卷

# pvscan
  PV /dev/sdb   VG lvm_01          lvm2 [<7.28 TiB / <284.04 GiB free]
  PV /dev/sdc                      lvm2 [<7.28 TiB]
  Total: 2 [14.55 TiB] / in use: 1 [<7.28 TiB] / in no VG: 1 [<7.28 TiB]

• 扩容物理卷卷组VG

# vgdisplay
  --- Volume group ---
  VG Name               lvm_01
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  2
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               1
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               <7.28 TiB
  PE Size               4.00 MiB
  Total PE              1907721
  Alloc PE / Size       1835008 / 7.00 TiB
  Free  PE / Size       72713 / <284.04 GiB
  VG UUID               ZhcL6C-EnJv-hG0Z-xK2j-Kcg9-6Wu3-QDhyZD

# vgextend lvm_01 /dev/sdc
  Volume group "lvm_01" successfully extended

• Free PE / Size 1980434 / 7.55 TiB 可以扩容的大小

# vgdisplay
  --- Volume group ---
  VG Name               lvm_01
  System ID
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               1
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               14.55 TiB
  PE Size               4.00 MiB
  Total PE              3815442
  Alloc PE / Size       1835008 / 7.00 TiB
  Free  PE / Size       1980434 / 7.55 TiB
  VG UUID               ZhcL6C-EnJv-hG0Z-xK2j-Kcg9-6Wu3-QDhyZD

# lvdisplay
  --- Logical volume ---
  LV Path                /dev/lvm_01/lv01
  LV Name                lv01
  VG Name                lvm_01
  LV UUID                8VfFgs-5mbK-YVyA-CkXc-IogB-Csov-u4TndV
  LV Write Access        read/write
  LV Creation host, time e5, 2019-12-02 15:46:49 +0800
  LV Status              available
  # open                 1
  LV Size                7.00 TiB
  Current LE             1835008
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0

• 按照百分比扩容

# lvextend -l +100%FREE /dev/lvm_01/lv01
  Size of logical volume lvm_01/lv01 changed from 7.00 TiB (1835008 extents) to 14.55 TiB (3815442 extents).
  Logical volume lvm_01/lv01 successfully resized.

• 刷新分区

# df -Th
dev/mapper/lvm_01-lv01 ext4      7.0T  4.3T  2.4T  65% /storage

# resize2fs /dev/lvm_01/lv01
resize2fs 1.44.1 (24-Mar-2018)
Filesystem at /dev/lvm_01/lv01 is mounted on /storage; on-line resizing required
old_desc_blocks = 896, new_desc_blocks = 1864
+++++The filesystem on /dev/lvm_01/lv01 is now 3907012608 (4k) blocks long.

# df -Th
/dev/mapper/lvm_01-lv01 ext4       15T  4.3T  9.6T  31% /storage

---

参考：

1. LVM 配置
2. Linux LVM 磁盘扩容