Configure Logical Volume Management (LVM)

blog.payperitem.com,

Logical Volume Management (LVM) allows for flexible disk space management in Linux. Below are step-by-step instructions to configure LVM on both generic Linux and Ubuntu.

Step 1: Install LVM

LVM is included in most Linux distributions, but if it’s missing, install it using:

bash
sudo apt update
sudo apt install lvm2 -y  # Ubuntu/Debian

For RHEL-based systems:

bash
sudo yum install lvm2 -y
sudo systemctl enable --now lvm2-lvmetad

Step 2: Identify Available Disks

Check available disks using:

bash
lsblk
fdisk -l

Assume we will use /dev/sdb and /dev/sdc for LVM.

Step 3: Create Physical Volumes (PVs)

Convert the disks to LVM physical volumes:

bash
sudo pvcreate /dev/sdb /dev/sdc

Verify:

bash
sudo pvdisplay

Step 4: Create a Volume Group (VG)

Create a volume group named vg_data:

bash
sudo vgcreate vg_data /dev/sdb /dev/sdc

Verify:

bash
sudo vgdisplay

Step 5: Create Logical Volumes (LV)

Create a logical volume (lv_storage) of 10GB:

bash
sudo lvcreate -L 10G -n lv_storage vg_data

Or use 50% of available space:

bash
sudo lvcreate -l 50%VG -n lv_storage vg_data

Verify:

bash
sudo lvdisplay

Step 6: Format the Logical Volume

Format with an ext4 filesystem:

bash
sudo mkfs.ext4 /dev/vg_data/lv_storage

Step 7: Mount the Logical Volume

Create a mount point:

bash
sudo mkdir /mnt/lvm_storage

Mount the volume:

bash
sudo mount /dev/vg_data/lv_storage /mnt/lvm_storage

Verify:

bash
df -h

Step 8: Persistent Mounting

To mount at boot, edit /etc/fstab:

bash
sudo nano /etc/fstab

Add:

bash
/dev/vg_data/lv_storage /mnt/lvm_storage ext4 defaults 0 2

Save and exit, then test:

bash
sudo mount -a

Step 9: Extending a Logical Volume (Optional)

If more space is needed:

bash
sudo lvextend -L +5G /dev/vg_data/lv_storage

Resize filesystem:

bash
sudo resize2fs /dev/vg_data/lv_storage

Verify:

bash
df -h

Step 10: Removing LVM (Optional)

If needed, unmount and remove:

bash
sudo umount /mnt/lvm_storage
sudo lvremove /dev/vg_data/lv_storage
sudo vgremove vg_data
sudo pvremove /dev/sdb /dev/sdc

Linux

Related Posts