Extend a Mounted LVM EXT3 Partition

Prerequisites:

You need to have some extra unused space in your volume group. That's pretty much it.


Dump:

[root@webapp /]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                    5.9G  4.5G  1.1G  81% /
/dev/xvda1             99M   29M   66M  31% /boot
tmpfs                 3.0G     0  3.0G   0% /dev/shm

[root@webapp /]# pvscan
PV /dev/xvda2   VG VolGroup00   lvm2 [15.50 GB / 7.56 GB free]
Total: 1 [15.50 GB] / in use: 1 [15.50 GB] / in no VG: 0 [0   ]

[root@webapp /]# lvextend -L+3G /dev/VolGroup00/LogVol00
Extending logical volume LogVol00 to 9.00 GB
Logical volume LogVol00 successfully resized

[root@webapp /]# resize2fs /dev/VolGroup00/LogVol00
resize2fs 1.39 (29-May-2006)
Filesystem at /dev/VolGroup00/LogVol00 is mounted on /; on-line resizing required
Performing an on-line resize of /dev/VolGroup00/LogVol00 to 2359296 (4k) blocks.
The filesystem on /dev/VolGroup00/LogVol00 is now 2359296 blocks long.

[root@webapp /]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                    8.8G  4.5G  3.9G  54% /
/dev/xvda1             99M   29M   66M  31% /boot
tmpfs                 3.0G     0  3.0G   0% /dev/shm

Done.