LVM Expansion Problem

I have attempted to expand the volume of an Ubuntu 18.04 server running on vmware. LVM is in use. I shut it down, expanded the virtual disk in vmware, and powered it up. I then used cfdisk to resize the 40GB /dev/sda3 to the max of 199GB. That went fine.

Output of cfdisk after reboot:
/dev/sda1 = 1M
/dev/sda2 = 1G
/dev/sda3 = 199G

I then ran df -h

Filesystem Size Used Avail Use% Mounted on
udev 3.9G 0 3.9G 0% /dev
tmpfs 798M 1.1M 797M 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 39G 4.0G 33G 11% /
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/loop0 90M 90M 0 100% /snap/core/8268
/dev/loop1 92M 92M 0 100% /snap/core/8592
/dev/sda2 976M 145M 765M 16% /boot
tmpfs 798M 0 798M 0% /run/user/1000

I know I need to expand /dev/mapper/ubuntu--vg-ubuntu--lv so I tried

resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv
resize2fs 1.44.1 (24-Mar-2018)
The filesystem is already 10222592 (4k) blocks long. Nothing to do!

Output of vgdisplay

 --- 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 <39.00 GiB PE Size 4.00 MiB Total PE 9983 Alloc PE / Size 9983 / <39.00 GiB Free PE / Size 0 / 0 VG UUID TXiMWd-sKCj-2nJc-yEZY-ZudW-DMOh-G2qc6d

Output of pvdisplay

--- Physical volume --- PV Name /dev/sda3 VG Name ubuntu-vg PV Size <39.00 GiB / not usable 0 Allocatable yes (but full) PE Size 4.00 MiB Total PE 9983 Free PE 0 Allocated PE 9983 PV UUID rmuSVO-uUCF-iKiA-0v8Q-IScl-zvHd-jfAzMn

I also tried

lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv
New size (9983 extents) matches existing size (9983 extents).

So my issue is that in cfdisk, it says /sda3 is 199G. However I can't figure out how to extend

/dev/mapper/ubuntu--vg-ubuntu--lv 39G 4.0G 33G 11% /

to fill the remaining ~160GB space on /sda3.

I would greatly appreciate any guidance. I was following the "faster method" here: Increase partition size on which Ubuntu is installed?

And now I seem to be stuck.

I should add that I also tried this, but it doesn't seem to like it on a mounted filesystem.

vgextend ubuntu-vg /dev/sda3
Can't open /dev/sda3 exclusively. Mounted filesystem?

1 Answer

I got it! :)

I had to run pvresize command. As soon as I ran

pvresize /dev/sda3
Physical volume "/dev/sda3" changed
1 physical volume(s) resized / 0 physical volume(s) not resized
root@xxxxx:~# pvdisplay --- Physical volume --- PV Name /dev/sda3 VG Name ubuntu-vg PV Size <199.00 GiB / not usable 16.50 KiB Allocatable yes PE Size 4.00 MiB Total PE 50943 Free PE 40960 Allocated PE 9983 PV UUID rmuSVO-uUCF-iKiA-0v8Q-IScl-zvHd-jfAzMn
root@xxxxx:~# lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv Size of logical volume ubuntu-vg/ubuntu-lv changed from <39.00 GiB (9983 extents) to <199.00 GiB (50943 extents). Logical volume ubuntu-vg/ubuntu-lv successfully resized.

All was looking good but df -h still showed:

Filesystem Size Used Avail Use% Mounted on
udev 3.9G 0 3.9G 0% /dev
tmpfs 798M 1.1M 797M 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 39G 4.0G 33G 11% /
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/loop0 90M 90M 0 100% /snap/core/8268
/dev/loop1 92M 92M 0 100% /snap/core/8592
/dev/sda2 976M 145M 765M 16% /boot
tmpfs 798M 0 798M 0% /run/user/1000

So I then ran

root@xxxxxx:~# resize2fs /dev/ubuntu-vg/ubuntu-lv
resize2fs 1.44.1 (24-Mar-2018)
Filesystem at /dev/ubuntu-vg/ubuntu-lv is mounted on /; on-line resizing required
old_desc_blocks = 5, new_desc_blocks = 25
The filesystem on /dev/ubuntu-vg/ubuntu-lv is now 52165632 (4k) blocks long.

and finally!

root@xxxxx:~# df -h
Filesystem Size Used Avail Use% Mounted on
udev 3.9G 0 3.9G 0% /dev
tmpfs 798M 1.1M 797M 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 196G 4.0G 184G 3% /
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/loop0 90M 90M 0 100% /snap/core/8268
/dev/loop1 92M 92M 0 100% /snap/core/8592
/dev/sda2 976M 145M 765M 16% /boot
tmpfs 798M 0 798M 0% /run/user/1000

Hopefully this helps someone else.