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지난번에 이어 LVM시스템에 디스크(볼륨)를 추가 확장 하는 방법을 해보겠습니다.
볼륨(20G) 추가하여 현재 /home 파티션(70G)을 확장 하는 방법을 알아 보겠습니다.
1. 기존 디스크 확장
물리장치(sdb) 또는 볼륨 추가 후 표시 용량이 설정한(20G) 용량으로 표시되어야 합니다. 용량에 변화가 변화가 없으면 재부팅 합니다.
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
fd0 2:0 1 4K 0 disk
sda 8:0 0 100G 0 disk
sda1 8:1 0 1G 0 part /boot
sda2 8:2 0 30G 0 part /
sda3 8:3 0 69G 0 part
vg--home-lv--home 253:0 0 69G 0 lvm /home
sdb 8:16 0 20G 0 disk
2. 파티션 생성
/dev/sdb에 sdb1파트션을 만들고 Linux LVM으로 바꿔 줍니다.
# fdisk /dev/sdb
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x49a98a24.
The device presents a logical sector size that is smaller than
the physical sector size. Aligning to a physical sector (or optimal
I/O) size boundary is recommended, or performance may be impacted.
Command (m for help):
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
Partition number (1-4, default 1):
First sector (2048-41943039, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-41943039, default 41943039):
Using default value 41943039
Partition 1 of type Linux and of size 20 GiB is set
Command (m for help): p
Disk /dev/sdb: 21.5 GB, 21474836480 bytes, 41943040 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: dos
Disk identifier: 0x49a98a24
Device Boot Start End Blocks Id System
/dev/sdb1 2048 41943039 20970496 83 Linux
Command (m for help):
Command (m for help): t
Selected partition 1
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'
Command (m for help): p
Disk /dev/sdb: 21.5 GB, 21474836480 bytes, 41943040 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: dos
Disk identifier: 0x49a98a24
Device Boot Start End Blocks Id System
/dev/sdb1 2048 41943039 20970496 8e Linux LVM
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
3. PV 생성
pvcreate 로 물리 볼륨 생성 및 pvdisplay 으로 확인 합니다.
[root@localhost ~]# pvcreate /dev/sdb1
Physical volume "/dev/sdb1" successfully created.
[root@localhost ~]# pvdisplay
--- Physical volume ---
PV Name /dev/sda3
VG Name vg-home
PV Size <69.00 GiB / not usable 3.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 17663
Free PE 0
Allocated PE 17663
PV UUID dFUFjg-ETp6-aCkV-UHpw-HpP7-e40T-7L00p3
"/dev/sdb1" is a new physical volume of "<20.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdb1
VG Name
PV Size <20.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID VjYTMM-ECCZ-GWrd-WpNS-OxMI-qYns-pnEr9x
4. VG 확장
기존 볼륨 그룸 확인 하고 vgextend로 볼륨 그룹을 확장합니다.
볼륨 정보 확인
# vgdisplay
--- Volume group ---
VG Name vg-home
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 <69.00 GiB
PE Size 4.00 MiB
Total PE 17663
Alloc PE / Size 17663 / <69.00 GiB
Free PE / Size 0 / 0
VG UUID MESw3F-j0gs-yzOo-bwR9-34nn-u0dP-qHOHEC
추가 볼륨을 확장
[root@localhost ~]# vgextend vg-home /dev/sdb1
Volume group "vg-home" successfully extended
볼륨확장 후 정보 확인
[root@localhost ~]# vgdisplay
--- Volume group ---
VG Name vg-home
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 88.99 GiB
PE Size 4.00 MiB
Total PE 22782
Alloc PE / Size 17663 / <69.00 GiB
Free PE / Size 5119 / <20.00 GiB
VG UUID MESw3F-j0gs-yzOo-bwR9-34nn-u0dP-qHOHEC
5. LV 확장 (lvextend)
lvdisplay로 물리 볼륨을 확인한다.
# lvdisplay
--- Logical volume ---
LV Path /dev/vg-home/lv-home
LV Name lv-home
VG Name vg-home
LV UUID AY0b7g-L0pN-DrTm-Lhgb-vqU5-T2W1-0cFe4e
LV Write Access read/write
LV Creation host, time localhost.localdomain, 2022-05-11 16:20:59 +0900
LV Status available
# open 1
LV Size <69.00 GiB
Current LE 17663
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:0
6. 리사이즈 (resize2fs )
작업전 용량 확인
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 30G 1.3G 29G 5% /
devtmpfs 484M 0 484M 0% /dev
tmpfs 493M 0 493M 0% /dev/shm
tmpfs 493M 19M 474M 4% /run
tmpfs 493M 0 493M 0% /sys/fs/cgroup
/dev/sda1 1014M 140M 875M 14% /boot
/dev/mapper/vg--home-lv--home 68G 55M 65G 1% /home
현재 작업하는 파티션 파일시스템 종류 확인 해보고 맞는 것으로 진행 하면 됩니다.
xfs인 경우 -> xfs_growfs
ext4 인 경우 -> resize2fs
파일시스템 종류 확인
[root@localhost ~]# blkid /dev/vg-home/lv-home
/dev/vg-home/lv-home: UUID="c29e7a45-dc2f-46b0-9f9a-62aa7e17ad07" TYPE="ext4"
[root@localhost ~]# resize2fs /dev/vg-home/lv-home
resize2fs 1.42.9 (28-Dec-2013)
Filesystem at /dev/vg-home/lv-home is mounted on /home; on-line resizing required
old_desc_blocks = 9, new_desc_blocks = 12
The filesystem on /dev/vg-home/lv-home is now 23328768 blocks long.
[root@localhost ~]# resize2fs /dev/vg-home/lv-home
resize2fs 1.42.9 (28-Dec-2013)
Filesystem at /dev/vg-home/lv-home is mounted on /home; on-line resizing required
old_desc_blocks = 9, new_desc_blocks = 12
The filesystem on /dev/vg-home/lv-home is now 23328768 blocks long.
7. 용량 확인
# /home 파티션에 추가된 용량 확인 됩니다.
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 30G 1.3G 29G 5% /
devtmpfs 484M 0 484M 0% /dev
tmpfs 493M 0 493M 0% /dev/shm
tmpfs 493M 19M 474M 4% /run
tmpfs 493M 0 493M 0% /sys/fs/cgroup
/dev/sda1 1014M 140M 875M 14% /boot
/dev/mapper/vg--home-lv--home 88G 59M 84G 1% /home728x90
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