====== Extend Existing Logical Volumes ======

**General Information**

Expanding existing logical volumes non-destructively. 

----

===== Basic LVM Setup =====

**Create single partition on a new disk**
<code bash>
fdisk /dev/sdb
n (new partition)
(use defaults)
t (change type)
8e (Linux LVM)
w (write changes and quit)
</code>

\\
**Create physical volume**
<code bash>
pvcreate /dev/sdb1
pvdisplay
</code>

\\
**Create volume group**
<code bash>
vgcreate vglocal /dev/sdb1
vgdisplay
</code>

\\
**Create logical volume**
<code bash>
lvcreate -n lvstorage -L 20G vglocal
lvdisplay
</code>

\\
**Create XFS Filesystem**
<code bash>
mkfs -t xfs /dev/vglocal/lvstorage
</code>

\\
**Mount the volume**
<code bash>
mkdir -p /mnt/mystorage
mount /dev/vglocal/lvstorage /mnt/mystorage
</code>

----

===== Extend a volume group =====

**Create a partition on a new disk**
<code bash>
gdisk /dev/sdc
(same defaults + lvm type change as basic setup)
</code>

\\
**Create physical volume from created partition**
<code bash>
pvcreate /dev/sdc1
</code>

\\
**Extend the "vglocal" volume group and verify**
<code bash>
vgextend vglocal /dev/sdc1
pvs
</code>

----



==== Extend a logical volume ====

**Extend volume to be 30G in size(from 20G original)**
<code bash>
lvextend -L 30G --resizefs /dev/vglocal/lvstorage
OR
lvextend -L +10G --resizefs /dev/vglocal/lvstorage
</code>
  * df -h shows that filesystem still needs to be resized to fill the LV container (if you did not use "--resizefs")

\\
**Resize the filesystem - if you did NOT use the "--resizefs" option above**
<code bash>
xfs_growfs /dev/vglocal/lvstorage
</code>
  * If EXT filesystem, use: resize2fs /dev/vglocal/lvstorage

----