If you need to increase the storage capacity of your root partition, you can do so by extending the Logical Volume Manager (LVM) and the XFS file system. Here’s a step-by-step guide on how to do this on a CentOS 7 system:
- Check the current state of your root partition by running the command “lsblk” or “df -h”. Take note of the name of your root partition and the free space available on your system.
- Create a new partition on your disk using the “fdisk” or “parted” command. Make sure to create a partition that is large enough to accommodate the additional space you need.
- Create a new Physical Volume (PV) on the new partition by running the command “pvcreate /dev/sdXN” where “sdXN” is the name of the new partition you created.
- Add the new PV to your existing Volume Group (VG) by running the command “vgextend VG_NAME /dev/sdXN” where “VG_NAME” is the name of your existing VG.
- Extend the Logical Volume (LV) that contains your root partition by running the command “lvextend -r -l +100%FREE /dev/VG_NAME/LV_NAME” where “VG_NAME” is the name of your VG and “LV_NAME” is the name of the LV that contains your root partition.
- Finally, extend the XFS file system by running the command “xfs_growfs /dev/VG_NAME/LV_NAME”.
After running these commands, your root partition will have been extended, and your XFS file system will have been expanded to fill the additional space. You can verify the new size of your root partition by running the “lsblk” or “df -h” commands again.
If you would like to practice, watch the video:
Tasks.
1. Extending physical disk to 5 Gb
2. Create file 1.txt in /tmp
3. Resize partition to maximum size
4. Resize LVM partition to maximum size
5. Extending the root logical volume to maximum size
6. Extend file system