How to extend EC2 root partition in LVM

In this tutorial, I am using the CentOS 6 (but also applicable on other Linux distro) that has ext4 partition lv_rootmounted as / and lv_swap as swap from the volume group VolGroup (which is default), we pretend that we are running out of space in lv_root(/) and volume group (VolGroup) doesn’t have any free space. We added a new volume with 150 GB space. Now, we need to assign this 150 GB space to volume group and then extend lv_root(/).

WARNING: Backup your data before attempting this.

First creating a new volume on EC2 management console and attaching to EC2 instance.

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Get the information about newly added hard disk using the following command:

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Note: /dev/xvdh is the newly added hard disk!

To create the partition on the second Hard disk, use the following command and follow the “on screen” instructions and change the partition type from Linux to LVM (8e):

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Identify the already mounted lvm file system type:

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Format the newly created partition using the following command:

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Initialize the newly created partition as a physical volume:

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Check the volume groups using the following command and extend

Note: vg_centos6 is the volume group that I want to extend, you can change according to your volume group.

Extend the VG (VolGroup) with new PV (/dev/xvdh):

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Extend the logical volume (lv_root) with all the free space of the VG(VolGroup):

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Finally, resize the file-system:

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Verify the file-system is larger using the following commands:

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GL & HF!

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