How to extend LVM based filesystem
To increase the space for LVM partition follow the steps given below:
1. Verify availability of the new space.
# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 500G 0 disk \u251c\u2500sda1 8:1 0 512M 0 part /boot \u251c\u2500sda2 8:2 0 29.5G 0 part \u2502 \u251c\u2500centos-root 253:0 0 799G 0 lvm / \u2502 \u2514\u2500centos-swap 253:1 0 512M 0 lvm [SWAP] \u251c\u2500sda3 8:3 0 220G 0 part \u2502 \u2514\u2500centos-root 253:0 0 799G 0 lvm / \u2514\u2500sda4 8:4 0 250G 0 part \u2514\u2500centos-root 253:0 0 799G 0 lvm / sdb 8:16 0 100G 0 disk \u2514\u2500sdb1 8:17 0 100G 0 part \u2514\u2500centos-root 253:0 0 799G 0 lvm / sdc 8:32 0 200G 0 disk \u2514\u2500sdc1 8:33 0 200G 0 part \u2514\u2500centos-root 253:0 0 799G 0 lvm / sdd 8:48 0 200G 0 disk sr0 11:0 1 1024M 0 rom
2. Create additional partition for the new swap partition.
# fdisk /dev/sdd
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 0x165e0fac.
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p):
Using default response p
Partition number (1-4, default 1):
First sector (2048-419430399, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-419430399, default 419430399):
Using default value 419430399
Partition 1 of type Linux and of size 200 GiB is set
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/sdd: 214.7 GB, 214748364800 bytes, 419430400 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x165e0fac
Device Boot Start End Blocks Id System
/dev/sdd1 2048 419430399 209714176 8e Linux LVM
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.3. Activate the new partition.
# partprobe
4. Verify the new partition is available.
# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 500G 0 disk \u251c\u2500sda1 8:1 0 512M 0 part /boot \u251c\u2500sda2 8:2 0 29.5G 0 part \u2502 \u251c\u2500centos-root 253:0 0 799G 0 lvm / \u2502 \u2514\u2500centos-swap 253:1 0 512M 0 lvm [SWAP] \u251c\u2500sda3 8:3 0 220G 0 part \u2502 \u2514\u2500centos-root 253:0 0 799G 0 lvm / \u2514\u2500sda4 8:4 0 250G 0 part \u2514\u2500centos-root 253:0 0 799G 0 lvm / sdb 8:16 0 100G 0 disk \u2514\u2500sdb1 8:17 0 100G 0 part \u2514\u2500centos-root 253:0 0 799G 0 lvm / sdc 8:32 0 200G 0 disk \u2514\u2500sdc1 8:33 0 200G 0 part \u2514\u2500centos-root 253:0 0 799G 0 lvm / sdd 8:48 0 200G 0 disk \u2514\u2500sdd1 8:49 0 200G 0 part sr0 11:0 1 1024M 0 rom
Note: a reboot may be needed if the change does not show at this point.
5. Create a new physical volume on the LUN.
# pvcreate /dev/sdd1
6. Add the new volume to the volume group for the swap volume. Our examples use centos and /dev/sdd1; replace with the volume names and devices as appropriate to your deployment.
# vgextend centos /dev/sdd1
7. Using vgdisplay command we can find out available Free PE(Physical Extents)/ Size
# vgdisplay --- Volume group --- VG Name centos System ID Format lvm2 Metadata Areas 6 Metadata Sequence No 12 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 2 Max PV 0 Cur PV 6 Act PV 6 VG Size <999.48 GiB PE Size 4.00 MiB Total PE 255866 Alloc PE / Size 204667 / 799.48 GiB Free PE / Size 51199 / <200.00 GiB VG UUID s9r38a-nQQX-eDR7-l9AW-PiTV-xW6i-o6H4rg
8. Resize the logical volume to the desired size.
# lvextend -l +51199 /dev/centos/root Size of logical volume centos/root changed from 798.98 GiB (204539 extents) to <998.98 GiB (255738 extents). Logical volume centos/root successfully resized.
9. Format the extended volume for xfs file system. use "resize2fs /dev/centos/root"
# xfs_growfs /dev/centos/root meta-data=/dev/mapper/centos-root isize=512 agcount=111, agsize=1900288 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=0 spinodes=0 data = bsize=4096 blocks=209447936, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =internal bsize=4096 blocks=3711, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 data blocks changed from 209447936 to 261875712
10. Enable the logical volume.
# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 500G 0 disk \u251c\u2500sda1 8:1 0 512M 0 part /boot \u251c\u2500sda2 8:2 0 29.5G 0 part \u2502 \u251c\u2500centos-root 253:0 0 999G 0 lvm / \u2502 \u2514\u2500centos-swap 253:1 0 512M 0 lvm [SWAP] \u251c\u2500sda3 8:3 0 220G 0 part \u2502 \u2514\u2500centos-root 253:0 0 999G 0 lvm / \u2514\u2500sda4 8:4 0 250G 0 part \u2514\u2500centos-root 253:0 0 999G 0 lvm / sdb 8:16 0 100G 0 disk \u2514\u2500sdb1 8:17 0 100G 0 part \u2514\u2500centos-root 253:0 0 999G 0 lvm / sdc 8:32 0 200G 0 disk \u2514\u2500sdc1 8:33 0 200G 0 part \u2514\u2500centos-root 253:0 0 999G 0 lvm / sdd 8:48 0 200G 0 disk \u2514\u2500sdd1 8:49 0 200G 0 part \u2514\u2500centos-root 253:0 0 999G 0 lvm / sr0 11:0 1 1024M 0 rom
11. View the new size.
# df -h / Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 999G 755G 245G 76% /
September 28, 2021
Tags :
Linux
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