Linux lvm分区扩容/ gparted 扩容
环境说明已知 pv 空间剩余大小 13.27t没有分配，把剩余空间分配到根目录的lv分区上查看分区df -lh文件系统容量已用可用 已用% 挂载点devtmpfs16G016G0% /devtmpfs16G016G0% /dev/shmtmpfs16G27M16G1%
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环境说明
已知 pv 空间剩余大小 13.27t没有分配，把剩余空间分配到根目录的lv分区上
查看分区
df -lh
文件系统 容量 已用 可用 已用% 挂载点
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 27M 16G 1% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/mapper/centos-root 1.3T 15G 1.3T 2% /
/dev/sda2 1016M 207M 809M 21% /boot
tmpfs 3.2G 48K 3.2G 1% /run/user/1000
tmpfs 3.2G 0 3.2G 0% /run/user/0
得出 根目录分区在 centos-root上
查看物理卷，卷组等信息
pvs
输出
PV VG Fmt Attr PSize PFree
/dev/sda3 centos lvm2 a-- 14.55t <13.27t
PV,PV是第一块硬盘第5个分区/dev/sda3
VG,vg的名字=centos
PSize,vg的容量大小约=14.55t
PFree，剩余空间大小=13.27t ，如果是0，需要扩充硬盘转换成PV，再由PV转换到VG
查看相关卷组信息
vgs
输出
VG #PV #LV #SN Attr VSize VFree
centos 1 2 0 wz--n- 14.55t <13.27t
显示逻辑卷属性
lvdisplay
输出
--- Logical volume ---
LV Path /dev/centos/root
LV Name root
VG Name centos
LV UUID UeVKLN-fH4G-qhZv-dK1x-gXl5-l8dJ-793u00
LV Write Access read/write
LV Creation host, time localhost, 2021-11-20 14:59:15 +0800
LV Status available
# open 1
LV Size <1.27 TiB
Current LE 332800
Segments 2
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
--- Logical volume ---
LV Path /dev/centos/swap
LV Name swap
VG Name centos
LV UUID 3OYh9F-Sr7M-AVk5-uw5c-Hepo-0JaI-geZZ6D
LV Write Access read/write
LV Creation host, time localhost, 2021-11-20 14:59:25 +0800
LV Status available
# open 2
LV Size 15.56 GiB
Current LE 3984
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
可以得出需要扩容的lv分区是 /dev/centos/root
扩容
# 全部扩容到 指定分区
lvextend -l +100%FREE /dev/centos/root
#扩容 1T
lvextend -L +1T /dev/centos/root
#扩容 1000G
lvextend -L +1000G /dev/centos/root
#扩容 100M
lvextend -L +100M /dev/centos/root
查看扩容结果
lsblk -f
输出
NAME FSTYPE MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 14.6T 0 disk
├─sda1 8:1 0 1M 0 part
├─sda2 8:2 0 1G 0 part /boot
└─sda3 8:3 0 14.6T 0 part
├─centos-root ext4 253:0 0 14.6T 0 lvm /
└─centos-swap 253:1 0 15.6G 0 lvm [SWAP]
同步文件系统,结束后完成现有分区的扩容
xfs 分区用
xfs_growfs /dev/centos/root
ext4 分区用
resize2fs /dev/centos/root
最后 df -lh 查看系统分区以扩容
其他分区加入逻辑卷
目的把 sda4 的扩容到 ubuntu--vg-ubuntu--lv中
lsblk -f
输出
NAME FSTYPE LABEL UUID FSAVAIL FSUSE% MOUNTPOINT
sda
├─sda1
├─sda2 ext4 b404e857-1bfa-46c3-a308-9774ef8f2fb9 1.1G 21% /boot
├─sda3 LVM2_member 6U5RAr-218T-RrDd-PRo7-118x-Bs85-wUMfBJ
│ └─ubuntu--vg-ubuntu--lv ext4 62a0b924-6149-4ed0-be85-cc0ed7f41e4c 8.9G 86% /
└─sda4
创建物理卷
pvcreate /dev/sda4
输出
Physical volume "/dev/sda4" successfully created.
查看 物理卷情况
pvdisplay
输出
--- Physical volume ---
PV Name /dev/sda3
VG Name ubuntu-vg
PV Size <98.50 GiB / not usable 0
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 25215
Free PE 0
Allocated PE 25215
PV UUID 6U5RAr-218T-RrDd-PRo7-118x-Bs85-wUMfBJ
"/dev/sda4" is a new physical volume of "100.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sda4
VG Name
PV Size 100.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID gW3jl6-EW3E-dLr9-sd1V-Xgeb-Kt1s-YKiGtm
将物理卷pv加入卷组vg
查看 vg 卷组
vgdisplay
输出
--- Volume group ---
VG Name ubuntu-vg
System ID
Format lvm2
Metadata Areas 1
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 1
Act PV 1
VG Size <98.50 GiB
PE Size 4.00 MiB
Total PE 25215
Alloc PE / Size 25215 / <98.50 GiB
Free PE / Size 0 / 0
VG UUID FuAQGT-03ju-10de-7h5L-abp8-lyj1-1SE2eY
将新分区 /dev/sda4 加入到卷组中ubuntu-vg
vgextend ubuntu-vg /dev/sda4
#输出
Volume group "ubuntu-vg" successfully extended
查看vg卷组，主要看结果Free PE / Size 这一行，空闲的空间
vgdisplay
输出
--- Volume group ---
VG Name ubuntu-vg
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 4
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 198.49 GiB
PE Size 4.00 MiB
Total PE 50814
Alloc PE / Size 25215 / <98.50 GiB
Free PE / Size 25599 / <100.00 GiB
VG UUID FuAQGT-03ju-10de-7h5L-abp8-lyj1-1SE2eY
扩容逻辑卷
# 全部扩容到 指定分区
lvextend -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv
#输出
Size of logical volume ubuntu-vg/ubuntu-lv changed from <98.50 GiB (25215 extents) to 198.49 GiB (50814 extents).
Logical volume ubuntu-vg/ubuntu-lv successfully resized.
/dev/mapper/ubuntu--vg-ubuntu--lv 如何得到，用df -h 命令
查看扩容结果
lsblk -f
输出
NAME FSTYPE LABEL UUID FSAVAIL FSUSE% MOUNTPOINT
sda
├─sda1
├─sda2 ext4 b404e857-1bfa-46c3-a308-9774ef8f2fb9 1.1G 21% /boot
├─sda3 LVM2_member 6U5RAr-218T-RrDd-PRo7-118x-Bs85-wUMfBJ
│ └─ubuntu--vg-ubuntu--lv ext4 62a0b924-6149-4ed0-be85-cc0ed7f41e4c 5.2G 90% /
└─sda4 LVM2_member gW3jl6-EW3E-dLr9-sd1V-Xgeb-Kt1s-YKiGtm
└─ubuntu--vg-ubuntu--lv ext4 62a0b924-6149-4ed0-be85-cc0ed7f41e4c 5.2G 90% /
同步文件系统,结束后完成现有分区的扩容
xfs 分区用
xfs_growfs /dev/mapper/ubuntu--vg-ubuntu--lv
ext4 分区用
resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv
最后 df -lh 查看系统分区以扩容
如果不是 lvm分区，可以用 gparted 界面化扩容
sudo apt install gparted
或
sudo yum install gparted
启动
sudo gparted
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