My instance of centos is running on azure this should not have any difference.
First of all lets view the current drive information. The drive i will be extending is /dev/sda1
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 908M 0 908M 0% /dev
tmpfs 920M 0 920M 0% /dev/shm
tmpfs 920M 8.9M 911M 1% /run
tmpfs 920M 0 920M 0% /sys/fs/cgroup
/dev/mapper/centos-root 14G 1.3G 13G 10% /
/dev/sda1 1014M 150M 865M 15% /boot
tmpfs To ensure our results are correct along the way, lets list our current blocks we will create dev/sda3
[root@localhost ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 25G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 15G 0 part
├─centos-root 253:0 0 13.4G 0 lvm /
└─centos-swap 253:1 0 1.6G 0 lvm [SWAP]
sr0 11:0 1 1024M 0 rom
[root@localhost ~]# fdisk -l
Disk /dev/sda: 26.8 GB, 26843545600 bytes, 52428800 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: 0x0003d0af
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 33554431 15727616 8e Linux LVM
Disk /dev/mapper/centos-root: 14.4 GB, 14382268416 bytes, 28090368 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 /dev/mapper/centos-swap: 1719 MB, 1719664640 bytes, 3358720 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
[root@localhost ~]# fdisk /dev/sda
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.
Command (m for help): p
Disk /dev/sda: 26.8 GB, 26843545600 bytes, 52428800 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: 0x0003d0af
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 33554431 15727616 8e Linux LVM
[root@localhost ~]# fdisk /dev/sda
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.
Command (m for help): n
Partition type:
p primary (2 primary, 0 extended, 2 free)
e extended
Select (default p): p
Partition number (3,4, default 3):
First sector (33554432-52428799, default 33554432):
Using default value 33554432
Last sector, +sectors or +size{K,M,G} (33554432-52428799, default 52428799):
Using default value 52428799
Partition 3 of type Linux and of size 9 GiB is set
Command (m for help): t
Partition number (1-3, default 3):
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
reboot
[root@localhost ~]# pvcreate /dev/sda3
Physical volume "/dev/sda3" successfully created.
[root@localhost ~]# vgdisplay
--- Volume group ---
VG Name centos
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size <15.00 GiB
PE Size 4.00 MiB
Total PE 3839
Alloc PE / Size 3839 / <15.00 GiB
Free PE / Size 0 / 0
VG UUID aOvaXh-QZwQ-nixW-geVT-psMH-je4K-Vt8Azu
[root@localhost ~]# vgextend centos /dev/sda3
Volume group "centos" successfully extended
[root@localhost ~]# pvscan
PV /dev/sda2 VG centos lvm2 [<15.00 GiB / 0 free]
PV /dev/sda3 VG centos lvm2 [<9.00 GiB / <9.00 GiB free]
Total: 2 [23.99 GiB] / in use: 2 [23.99 GiB] / in no VG: 0 [0 ]
Now lets find the logical volume
[root@localhost ~]# lvdisplay
--- Logical volume ---
LV Path /dev/centos/swap
LV Name swap
VG Name centos
LV UUID 4RvCav-8RP3-VHtR-TTu2-bwKk-DDYO-Z8zm2a
LV Write Access read/write
LV Creation host, time localhost, 2020-08-17 12:31:11 +0100
LV Status available
# open 2
LV Size 1.60 GiB
Current LE 410
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:1
--- Logical volume ---
LV Path /dev/centos/root
LV Name root
VG Name centos
LV UUID 1uuMah-ef5K-7ReA-cGed-oFEy-Sa2k-pG0gzB
LV Write Access read/write
LV Creation host, time localhost, 2020-08-17 12:31:11 +0100
LV Status available
# open 1
LV Size 13.39 GiB
Current LE 3429
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:0
[root@localhost ~]# lvextend /dev/centos/root /dev/sda3
Size of logical volume centos/root changed from 13.39 GiB (3429 extents) to 22.39 GiB (5732 extents).
Logical volume centos/root successfully resized.
Now lets resize so we can use the additional space
[root@localhost ~]# xfs_growfs /dev/centos/root
meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=877824 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=3511296, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=2560, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 3511296 to 5869568
[root@localhost ~]#
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 908M 0 908M 0% /dev
tmpfs 920M 0 920M 0% /dev/shm
tmpfs 920M 8.9M 911M 1% /run
tmpfs 920M 0 920M 0% /sys/fs/cgroup
/dev/mapper/centos-root 23G 1.3G 22G 6% /
/dev/sda1 1014M 150M 865M 15% /boot
tmpfs 184M 0 184M 0% /run/user/0