Cara memperbesar partisi root di Linux Ubuntu

root@k3s-node-03:~# lsblk
NAME                      MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
loop0                       7:0    0  63.4M  1 loop /snap/core20/1974
loop1                       7:1    0 111.9M  1 loop /snap/lxd/24322
loop2                       7:2    0  53.3M  1 loop /snap/snapd/19457
loop3                       7:3    0  63.5M  1 loop /snap/core20/2015
loop4                       7:4    0  40.9M  1 loop /snap/snapd/20290
sda                         8:0    0    50G  0 disk
├─sda1                      8:1    0     1M  0 part
├─sda2                      8:2    0   1.8G  0 part /boot
└─sda3                      8:3    0  14.2G  0 part
  └─ubuntu--vg-ubuntu--lv 253:0    0  14.2G  0 lvm  /
sdb                         8:16   0    50G  0 disk
sr0                        11:0    1     2G  0 rom
root@k3s-node-03:~#
root@k3s-node-03:~#

root@k3s-node-03:~# vgs
  VG        #PV #LV #SN Attr   VSize   VFree
  ubuntu-vg   1   1   0 wz--n- <14.25g    0
root@k3s-node-03:~#
root@k3s-node-03:~# lvs
  LV        VG        Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  ubuntu-lv ubuntu-vg -wi-ao---- <14.25g
root@k3s-node-03:~#
root@k3s-node-03:~# pvs
  PV         VG        Fmt  Attr PSize   PFree
  /dev/sda3  ubuntu-vg lvm2 a--  <14.25g    0
root@k3s-node-03:~#

root@k3s-node-03:~# cfdisk /dev/sda
GPT PMBR size mismatch (33554431 != 104857599) will be corrected by write.
The backup GPT table is not on the end of the device. This problem will be corrected by write.

Syncing disks.
root@k3s-node-03:~#

root@k3s-node-03:~# pvresize /dev/sda3
  Physical volume "/dev/sda3" changed
  1 physical volume(s) resized or updated / 0 physical volume(s) not resized
root@k3s-node-03:~#
root@k3s-node-03:~# pvs
  PV         VG        Fmt  Attr PSize   PFree
  /dev/sda3  ubuntu-vg lvm2 a--  <48.25g 34.00g
root@k3s-node-03:~#
root@k3s-node-03:~# vgs
  VG        #PV #LV #SN Attr   VSize   VFree
  ubuntu-vg   1   1   0 wz--n- <48.25g 34.00g
root@k3s-node-03:~#

root@k3s-node-03:~# lvextend -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv
  Size of logical volume ubuntu-vg/ubuntu-lv changed from <14.25 GiB (3647 extents) to <48.25 GiB (12351 extents).
  Logical volume ubuntu-vg/ubuntu-lv successfully resized.
root@k3s-node-03:~#
root@k3s-node-03:~# vgs
  VG        #PV #LV #SN Attr   VSize   VFree
  ubuntu-vg   1   1   0 wz--n- <48.25g    0
root@k3s-node-03:~# lvs
  LV        VG        Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  ubuntu-lv ubuntu-vg -wi-ao---- <48.25g
root@k3s-node-03:~#
root@k3s-node-03:~# df -hT
Filesystem                        Type   Size  Used Avail Use% Mounted on
tmpfs                             tmpfs  392M  1.4M  390M   1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv ext4    14G   11G  2.6G  82% /
tmpfs                             tmpfs  2.0G     0  2.0G   0% /dev/shm
tmpfs                             tmpfs  5.0M     0  5.0M   0% /run/lock
/dev/sda2                         ext4   1.7G  251M  1.4G  16% /boot
tmpfs                             tmpfs  392M  4.0K  392M   1% /run/user/0
root@k3s-node-03:~#

root@k3s-node-03:~# resize2fs /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 = 2, new_desc_blocks = 7
The filesystem on /dev/mapper/ubuntu--vg-ubuntu--lv is now 12647424 (4k) blocks long.

root@k3s-node-03:~#
root@k3s-node-03:~# df -hT
Filesystem                        Type   Size  Used Avail Use% Mounted on
tmpfs                             tmpfs  392M  1.4M  390M   1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv ext4    48G   11G   35G  24% /
tmpfs                             tmpfs  2.0G     0  2.0G   0% /dev/shm
tmpfs                             tmpfs  5.0M     0  5.0M   0% /run/lock
/dev/sda2                         ext4   1.7G  251M  1.4G  16% /boot
tmpfs                             tmpfs  392M  4.0K  392M   1% /run/user/0
root@k3s-node-03:~#