How to expand an existing XFS filesystem on LVM Logical Volume on Linux

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Expanding an XFS Filesystem on LVM Logical Volume in RHEL 7.9

To expand an existing XFS filesystem on an LVM logical volume, you can follow these steps. Please note that this example is specific to RHEL 7.9.

  1. Display information about the LVM physical volumes:

    $ sudo pvs
  PV         VG     Fmt  Attr PSize    PFree
  /dev/sda2  sdavg  lvm2 a--  <15.51g  0
  /dev/sda3  sdavg  lvm2 a--  <44.00g  0

  2. Add a physical disk /dev/sdb:

    $ sudo lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
fd0               2:0    1    4K  0 disk
sda               8:0    0   60G  0 disk
├─sda1            8:1    0  500M  0 part /boot
├─sda2            8:2    0 15.5G  0 part
│ ├─sdavg-rootlv 253:0    0 57.9G  0 lvm  /
│ └─sdavg-swaplv 253:1    0  1.6G  0 lvm  [SWAP]
└─sda3            8:3    0   44G  0 part
  └─sdavg-rootlv 253:0    0 57.9G  0 lvm  /
sdb               8:16   0   40G  0 disk

  3. Initialize /dev/sdb disk for use by LVM:

    $ sudo pvcreate /dev/sdb
  Physical volume "/dev/sdb" successfully created.

  4. Display information about the LVM physical volumes:

    $ sudo pvs
  PV         VG     Fmt  Attr PSize    PFree
  /dev/sda2  sdavg  lvm2 a--  <15.51g  0
  /dev/sda3  sdavg  lvm2 a--  <44.00g  0
  /dev/sdb          lvm2 ---   40.00g 40.00g

  5. Display information about the LVM volume groups:

    $ sudo vgs
  VG     #PV #LV #SN Attr   VSize   VFree
  sdavg   2   2   0 wz--n- <59.50g  0

  6. Add /dev/sdb LVM physical volume to the sdavg LVM volume group:

    $ sudo vgextend sdavg /dev/sdb
  Volume group "sdavg" successfully extended.

  7. Display information about the LVM volume groups:

    $ sudo vgs
  VG     #PV #LV #SN Attr   VSize   VFree
  sdavg   3   2   0 wz--n- <99.50g  <40.00g

  8. Display information about the LVM logical volumes:

    $ sudo lvs


  LV       VG     Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  rootlv   sdavg  -wi-ao---- 57.90g
  swaplv   sdavg  -wi-ao----  1.60g

  9. Extend the root LVM logical volume to use all available free space in the LVM volume group:

    $ sudo lvextend --extents +100%FREE /dev/sdavg/rootlv
  Size of logical volume sdavg/rootlv changed from 57.90 GiB (14823 extents) to <97.90 GiB (25062 extents).
  Logical volume sdavg/rootlv successfully resized.

  10. Display information about the LVM logical volumes:

    $ sudo lvs
  LV       VG     Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  rootlv   sdavg  -wi-ao---- <97.90g
  swaplv   sdavg  -wi-ao----  1.60g

  11. Expand the root XFS filesystem:

    $ sudo xfs_growfs /dev/mapper/sdavg-rootlv
meta-data=/dev/mapper/sdavg-rootlv isize=256    agcount=17, agsize=908800 blks
         =                        sectsz=512   attr=2, projid32bit=1
         =                        crc=0        finobt=0 spinodes=0
data     =                        bsize=4096   blocks=25663488, imaxpct=25
         =                        sunit=0      swidth=0 blks
naming   =version 2               bsize=4096   ascii-ci=0 ftype=0
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 15178752 to 25663488

This process allows you to expand an existing XFS filesystem on an LVM logical volume. Ensure you follow the steps carefully, as any mistakes may cause data loss.