Add a Disk to Expand Storage of Existing LVM

Add a Disk to Expand Storage of Existing LVM

### This walkthrough has been tested on Ubuntu Linux 22.04 LTS for xfs filesystem
### Reference: https://www.cyberciti.biz/faq/howto-add-disk-to-lvm-volume-on-linux-to-increase-size-of-pool

# df -h | grep -v tmpfs
  Filesystem                     Size  Used Avail Use% Mounted on
  /dev/mapper/VG_SERVER-LV_ROOT   45G  7.9G   38G  18% /
  /dev/sda2                      974M  374M  533M  42% /boot

# lvs
  LV      VG        Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  LV_ROOT VG_SERVER -wi-ao---- <45.00g
  LV_SWAP VG_SERVER -wi-ao----   4.00g

# lvmdiskscan
  /dev/sda2  [       1.00 GiB]
  /dev/sda3  [     <49.00 GiB] LVM physical volume
  /dev/sdb   [     500.00 GiB]
  1 disk
  0 LVM physical volume whole disks
  1 LVM physical volume

# pvcreate /dev/sdb
  Physical volume "/dev/sdb" successfully created.

# lvmdiskscan -l
  WARNING: only considering LVM devices
  /dev/sda3  [     <49.00 GiB] LVM physical volume
  /dev/sdb   [     500.00 GiB] LVM physical volume
  1 LVM physical volume whole disk
  1 LVM physical volume

# vgextend VG_SERVER /dev/sdb
  Volume group "VG_SERVER" successfully extended

# lvm lvextend -l +100%FREE /dev/VG_SERVER/LV_ROOT
  Size of logical volume VG_SERVER/LV_ROOT changed from <45.00 GiB (11519 extents) to 544.99 GiB (139518 extents).
  Logical volume VG_SERVER/LV_ROOT successfully resized.

# mount | grep '/dev/mapper'
  /dev/mapper/VG_SERVER-LV_ROOT on / type xfs (rw,relatime,attr2,inode64,logbufs=8,logbsize=32k,noquota)

# xfs_growfs /dev/mapper/VG_SERVER-LV_ROOT
  meta-data=/dev/mapper/VG_SERVER-LV_ROOT isize=512    agcount=4, agsize=2948864 blks
           =                       sectsz=512   attr=2, projid32bit=1
           =                       crc=1        finobt=1, sparse=1, rmapbt=0
           =                       reflink=1    bigtime=0 inobtcount=0
  data     =                       bsize=4096   blocks=11795456, imaxpct=25
           =                       sunit=0      swidth=0 blks
  naming   =version 2              bsize=4096   ascii-ci=0, ftype=1
  log      =internal log           bsize=4096   blocks=5759, version=2
           =                       sectsz=512   sunit=0 blks, lazy-count=1
  realtime =none                   extsz=4096   blocks=0, rtextents=0
  data blocks changed from 11795456 to 142866432

# df -h | grep -v tmpfs
  Filesystem                     Size  Used Avail Use% Mounted on
  /dev/mapper/VG_SERVER-LV_ROOT  545G   12G  534G   3% /
  /dev/sda2                      974M  374M  533M  42% /boot


### This walkthrough has been tested on Ubuntu Linux 22.04 LTS for ext4 filesystem

# df -h | grep -v tmpfs
  Filesystem                         Size  Used Avail Use% Mounted on
  /dev/mapper/ubuntu--vg-ubuntu--lv   24G  6.9G   16G  31% /
  /dev/sda2                          2.0G  125M  1.7G   7% /boot

# lvs
  LV        VG        Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  ubuntu-lv ubuntu-vg -wi-ao---- <24.00g

# lvmdiskscan
  /dev/nvme0n1 [      50.00 GiB]
  /dev/sda2    [       2.00 GiB]
  /dev/sda3    [     <48.00 GiB] LVM physical volume
  0 disks
  0 LVM physical volume whole disks
  1 LVM physical volume

# pvcreate /dev/nvme0n1
  Physical volume "/dev/nvme0n1" successfully created.

# lvmdiskscan -l
  WARNING: only considering LVM devices
  /dev/nvme0n1 [      50.00 GiB] LVM physical volume
  /dev/sda3    [     <48.00 GiB] LVM physical volume
  0 LVM physical volume whole disks
  2 LVM physical volumes

# vgextend ubuntu-vg /dev/nvme0n1
  Volume group "ubuntu-vg" successfully extended

# lvm lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv
  Size of logical volume ubuntu-vg/ubuntu-lv changed from <24.00 GiB (6143 extents) to 97.99 GiB (25086 extents).
  Logical volume ubuntu-vg/ubuntu-lv successfully resized.

# mount | grep '/dev/mapper'
  /dev/mapper/ubuntu--vg-ubuntu--lv on / type ext4 (rw,relatime)

# 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 = 3, new_desc_blocks = 13
  The filesystem on /dev/mapper/ubuntu--vg-ubuntu--lv is now 25688064 (4k) blocks long.

# df -h | grep -v tmpfs
  Filesystem                         Size  Used Avail Use% Mounted on
  /dev/mapper/ubuntu--vg-ubuntu--lv   97G  6.9G   86G   8% /
  /dev/sda2                          2.0G  125M  1.7G   7% /boot