Resize the Default LVM Volume on Ubuntu
Verify
Run a test first to verify that it can resize properly before you actually modify the partition
$ sudo lsblk
[sudo] password for ubuntu:
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
loop0 7:0 0 111.9M 1 loop /snap/lxd/24322
loop1 7:1 0 49.8M 1 loop /snap/snapd/18357
...
sda 8:0 0 931.5G 0 disk
├─sda1 8:1 0 1G 0 part /boot/efi
├─sda2 8:2 0 2G 0 part /boot
└─sda3 8:3 0 928.5G 0 part
└─ubuntu--vg-ubuntu--lv 253:0 0 100G 0 lvm /
sdb 8:16 0 931.5G 0 disk
├─sdb1 8:17 0 1G 0 part
├─sdb2 8:18 0 2G 0 part
└─sdb3 8:19 0 928.5G 0 part
$ sudo df -h | grep ubuntu
/dev/mapper/ubuntu--vg-ubuntu--lv 98G 7.0G 86G 8% /
Now that we know the ubuntu--vg-ubuntu--lv logical volume is only 98G.
Test Resize
we can resize the ubuntu--vg-ubuntu--lv logical volume to the +20%FREE space.
$ sudo lvresize -t -v -l +20%FREE /dev/mapper/ubuntu--vg-ubuntu--lv
output:
TEST MODE: Metadata will NOT be updated and volumes will not be (de)activated.
Converted 20%FREE into at most 42417 physical extents.
Test mode: Skipping archiving of volume group.
Extending logical volume ubuntu-vg/ubuntu-lv to up to 265.69 GiB
Size of logical volume ubuntu-vg/ubuntu-lv changed from 100.00 GiB (25600 extents) to 265.69 GiB (68017 extents).
Test mode: Skipping backup of volume group.
Logical volume ubuntu-vg/ubuntu-lv successfully resized.
Logical volume ubuntu-vg/ubuntu-lv successfully resized.
Resize the logical volume
$ sudo lvresize -v -l +20%FREE /dev/mapper/ubuntu--vg-ubuntu--lv
output:
Converted 20%FREE into at most 42417 physical extents.
Archiving volume group "ubuntu-vg" metadata (seqno 2).
Extending logical volume ubuntu-vg/ubuntu-lv to up to 265.69 GiB
Size of logical volume ubuntu-vg/ubuntu-lv changed from 100.00 GiB (25600 extents) to 265.69 GiB (68017 extents).
Loading table for ubuntu--vg-ubuntu--lv (253:0).
Suspending ubuntu--vg-ubuntu--lv (253:0) with device flush
Resuming ubuntu--vg-ubuntu--lv (253:0).
Creating volume group backup "/etc/lvm/backup/ubuntu-vg" (seqno 3).
Logical volume ubuntu-vg/ubuntu-lv successfully resized.
Verify
$ sudo lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
loop0 7:0 0 111.9M 1 loop /snap/lxd/24322
....
sda 8:0 0 931.5G 0 disk
├─sda1 8:1 0 1G 0 part /boot/efi
├─sda2 8:2 0 2G 0 part /boot
....
└─sda3 8:3 0 928.5G 0 part
└─ubuntu--vg-ubuntu--lv 253:0 0 265.7G 0 lvm /
...
sdb 8:16 0 931.5G 0 disk
├─sdb1 8:17 0 1G 0 part
├─sdb2 8:18 0 2G 0 part
└─sdb3 8:19 0 928.5G 0 part
Now that the logical volume is 265.7G
Resize the filesystem
check:
$ sudo df -h -T | grep vg
/dev/mapper/ubuntu--vg-ubuntu--lv ext4 98G 7.1G 86G 8% /
Filesystem Size : 98G
resize:
$ sudo resize2fs -p /dev/mapper/ubuntu--vg-ubuntu--lv
resize2fs 1.46.5 (30-Dec-2021)
Filesystem at /dev/mapper/ubuntu--vg-ubuntu--lv is mounted on /; on-line resizing required
old_desc_blocks = 13, new_desc_blocks = 34
The filesystem on /dev/mapper/ubuntu--vg-ubuntu--lv is now 69649408 (4k) blocks long.
validate:
$ sudo df -h -T | grep vg
/dev/mapper/ubuntu--vg-ubuntu--lv ext4 261G 7.1G 243G 3% /
Filesystem Size : 261G