[xuej@localhost ~]$ ls /dev/sd*
/dev/sda /dev/sda1 /dev/sda2 /dev/sdb
[xuej@localhost ~]$ sudo vgs
[sudo] password for xuej:
VG #PV #LV #SN Attr VSize VFree
centos 1 2 0 wz--n- <19.00g 0
[xuej@localhost ~]$ df -lh
Filesystem Size Used Avail Use% Mounted on
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 3.9G 9.6M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/mapper/centos-root 17G 16G 1.8G 90% /
/dev/loop0 69M 69M 0 100% /var/lib/snapd/snap/another-redis-desktop-manager/9
/dev/loop4 128K 128K 0 100% /var/lib/snapd/snap/bare/5
/dev/loop1 165M 165M 0 100% /var/lib/snapd/snap/gnome-3-28-1804/161
/dev/loop2 56M 56M 0 100% /var/lib/snapd/snap/core18/2667
/dev/sda1 1014M 239M 776M 24% /boot
/dev/loop3 92M 92M 0 100% /var/lib/snapd/snap/gtk-common-themes/1535
/dev/loop5 50M 50M 0 100% /var/lib/snapd/snap/snapd/17950
tmpfs 783M 4.0K 783M 1% /run/user/42
tmpfs 783M 24K 783M 1% /run/user/1000
[xuej@localhost ~]$ sudo pvcreate /dev/sdb
Physical volume "/dev/sdb" successfully created.
[xuej@localhost ~]$ sudo vgextend centos /dev/sdb
Volume group "centos" successfully extended
[xuej@localhost ~]$ sudo vgs
VG #PV #LV #SN Attr VSize VFree
centos 2 2 0 wz--n- 38.99g <20.00g
[xuej@localhost ~]$ sudo lvextend -L +20G /dev/mapper/centos-root
Insufficient free space: 5120 extents needed, but only 5119 available
[xuej@localhost ~]$ sudo lvextend -L +19.99G /dev/mapper/centos-root
Rounding size to boundary between physical extents: 19.99 GiB.
Size of logical volume centos/root changed from <17.00 GiB (4351 extents) to <36.99 GiB (9469 extents).
Logical volume centos/root successfully resized.
[xuej@localhost ~]$ sudo xfs_growfs /dev/mapper/centos-root
meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=1113856 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=4455424, 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 4455424 to 9696256
[xuej@localhost ~]$ df -lh
Filesystem Size Used Avail Use% Mounted on
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 3.9G 9.6M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/mapper/centos-root 37G 16G 22G 42% /
/dev/loop0 69M 69M 0 100% /var/lib/snapd/snap/another-redis-desktop-manager/9
/dev/loop4 128K 128K 0 100% /var/lib/snapd/snap/bare/5
/dev/loop1 165M 165M 0 100% /var/lib/snapd/snap/gnome-3-28-1804/161
/dev/loop2 56M 56M 0 100% /var/lib/snapd/snap/core18/2667
/dev/sda1 1014M 239M 776M 24% /boot
/dev/loop3 92M 92M 0 100% /var/lib/snapd/snap/gtk-common-themes/1535
/dev/loop5 50M 50M 0 100% /var/lib/snapd/snap/snapd/17950
tmpfs 783M 4.0K 783M 1% /run/user/42
tmpfs 783M 28K 783M 1% /run/user/1000
