LVM: Grow LVM and resize partition

Sometimes your install a distro and it refuses to take up all available space.

1. Find out how much space we got to play with.

$ sudo vgdisplay
 --- Volume group ---
  VG Name               fedora
  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               <49.00 GiB
  PE Size               4.00 MiB
  Total PE              12543
  Alloc PE / Size       4860 / 18.98 GiB
  Free  PE / Size       7683 / 30.01 GiB
  VG UUID               cCXkBg-Z8Or-jmmi-avaK-91VW-v3cF-CmhiKD

2. Resize your logical volume of choice to soak up the space

$ sudo lvresize --size +30.01G /dev/fedora/root
  Rounding size to boundary between physical extents: 30.01 GiB.
  Size of logical volume fedora/root changed from 15.00 GiB (3840 extents) to 45.01 GiB (11523 extents).
  Logical volume fedora/root successfully resized.

3. Grow your partition

XFS Example:

$ sudo xfs_growfs /
meta-data=/dev/mapper/fedora-root isize=512    agcount=4, agsize=983040 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=1 spinodes=0 rmapbt=0
         =                       reflink=0
data     =                       bsize=4096   blocks=3932160, 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 3932160 to 11799552

EXT4 Example:

$ sudo resize2fs /dev/vg0/lv0 
resize2fs 1.43.4 (31-Jan-2017)
Filesystem at /dev/vg0/lv0 is mounted on /; on-line resizing required
old_desc_blocks = 5, new_desc_blocks = 12
The filesystem on /dev/vg0/lv0 is now 47122432 (4k) blocks long.