LVM

Resource

• Logical Volume Manager (Linux)
• Benefits of LVM
• A layout illustration
• LVM Demystified
• How To Install Ubuntu 20.04 LTS (Focal Fossa) On UEFI and Legacy BIOS System
• How to Manage and Use LVM (Logical Volume Management) in Ubuntu
  • How to Use LVM on Ubuntu for Easy Partition Resizing and Snapshots
• How to Extend LVM Disk on Ubuntu 20.04
• How to Extend/Increase LVM’s (Logical Volume Resize) in Linux, How To Resize LVM Partitions In Linux
• Adding a New Disk to an Ubuntu 20.04 Volume Group and Logical Volume
• How to Set Up Flexible File System Storage With LVM in Linux
• LFCS: How to Manage and Create LVM Using vgcreate, lvcreate and lvextend Commands – Part 11
• An Introduction to LVM Concepts, Terminology, and Operations

Cheatsheet

• Downloadable LVM Cheat Sheet
• datadisk.org.uk
• privex.io

Naming convention

• /dev/vg_<hostname>_<type><number>/lv_<filesystem>. See this
• /dev/vg_`hostname -s`_[0-9][0-9]/lv_{foo|bar}. See this.

Creation

• Setup LVM and pool hard drives in Ubuntu or Kodibuntu

  # Step 1 Find your drive names
  lsblk -o NAME,FSTYPE,SIZE,MOUNTPOINT,LABEL
  
  NAME         FSTYPE        SIZE MOUNTPOINT   LABEL
  sda                      223.6G              
  ├─sda1                    1007K              
  ├─sda2       vfat          512M /boot/efi    
  └─sda3       LVM2_member 223.1G              
    ├─pve-swap swap            8G [SWAP]       
    └─pve-root ext4        215.1G /            
  nvme0n1                  465.8G              
  └─nvme0n1p1  ext4        465.8G /mnt/pve/vm1 
  
  # Step 2 Format your drives
  fdisk /dev/sdX
  
  # Step 3 Create physical volume
  pvcreate /dev/sd[bcd]
  pvdisplay
  
  # Step 4 Adding the VG (Volume Group) to the LVM
  vgcreate {VG_NAME} /dev/sd[bcd]
  vgdisplay
  
  # Step 5 Adding the LV (Logical Volume) to the LVM VG (Volume Group)
  lvcreate -l 100%FREE -n {LV_NAME} {VG_NAME}
  lvdisplay
  
  # Step 6 FORMATTING OUR NEW LVM LV (LOGICAL VOLUME)
  mkfs.ext4 {LV_PATH}
  
  # Step 7 MOUNT LVM LV (LOGICAL VOLUME) ON BOOT
  blkid
  # Grab the UUID of your storage space, 
  # it will be after the /dev/mapper/{VG_NAME}-{LV_NAME}
  nano /etc/fstab
  mount -a
  
  # Step 8 ENABLE SMART DRIVE MONITORING
  nano /etc/defaults/smartmontools
  nano /etc/smartd.conf

• LVM Layout & Arch Linux Tutorial – Configure LVM on Arch Linux 2017

  # Step 0 See available physical disks
  fdisk
  
  # Step 1 Create new Physical Volume
  pvcreate /dev/vdb
  pvcreate /dev/vdc
  pvdisplay 
  
  # Step 2 Create new Volume Group (VG)
  vgcreate archVG /dev/vdb /dev/vdc
  vgdisplay
  
  # Step 3 Logical Volume
  lvcreate -L 5G archVG -n archLV01
  lvcreate -L 15G archVG -n archLV02
  lvdisplay
  lsblk 
  
  # Step 4 Format the new volume
  mkfs.ext4 /dev/mapper/archVG-archLV01
  
  # Step 5 Mount
  mount /dev/mapper/archVG-archLV01 /mnt

• How to Extend LVM Disk on Ubuntu 20.04

  # Step 1. Check the file system list
  sudo df -h /home/
  
  # Step 2. Check the Physical Volume (pv)
  sudo pvs
  sudo vgdisplay
  sudo lvdisplay
  
  # Step 3. Create a New Physical Volume
  sudo fdisk -l
  sudo lvmdiskscan
  sudo pvcreate /dev/sdb
  sudo lvmdiskscan -l
  
  # Step 4. Add the new Physical Volume (pv) to Existing Logical Volume (lv)
  sudo vgextend ubuntu-vg /dev/sdb
  sudo lvm lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv
  
  sudo resize2fs -p /dev/mapper/ubuntu--vg-ubuntu--lv
  sudo df -h

Add new disk

• How to add new disk to existing Volume Group vgextend

  # Step 1 Create Physical Volume
  pvcreate /dev/vdc
  
  # Step 2 Add Physical Volume to Existing Volume Group
  vgdisplay
  vgextend manjaro_lvm /dev/vdc
  vgdisplay

• Adding a New Disk Into an Existing Logical Volume. lvextend

  umount /dev/serverdata/data
  fdisk -l
  pvcreate /dev/sdb
  vgextend serverdata /dev/sdb
  vgdisplay serverdata 
  
  lvextend -l +100%FREE /dev/serverdata/data
  # OR something like 
  # lvextend -L+25G /dev/serverdata/data
  lvdisplay serverdata
  
  e2fsck -f /dev/serverdata/data # optional
  resize2fs /dev/serverdata/data
  e2fsck -f /dev/serverdata/data # optional

Delete

• 5.2.5. REMOVING PHYSICAL VOLUMES from RedHat
• How to Delete Volume Group(LVM) in Linux Using 5 Easy Steps

  # 1. Check mounted Logical Volume using df command
  df -h
  # 2. Unmount the Volume using umount command
  umount /u01
  # 3. Disable Logical Volume using lvchange command
  lvchange -an /dev/vol_grp/log_grp1
  lvscan
  # 4. Delete Logical Volume using lvremove command
  lvremove /dev/vol_grp/log_grp1
  lvscan
  # 5. Delete Volume Group using vgremove command
  vgremove vol_grp
  vgscan
  # 6. Delete physical volumes using pvremove command
  pvremove /dev/sdb
  pvremove /dev/sda4

• How to Remove Physical Volume from a Volume Group in LVM
• How to Remove Volume Group and Physical Volume on LVM
• Linux Quick Tip: How to Delete or Remove LVM volumes
• Using LVM to manage physical volumes, volume groups, and logical volumes – RHCSA Objective Preparation

Snapshot

• 5.4.5. CREATING SNAPSHOT VOLUMES from RedHat
• How to Take ‘Snapshot of Logical Volume and Restore’ in LVM – Part III
  • lvcreate
  • lvconvert
• Backup and Restore Logical Volume using LVM Snapshot
• LVM backup and restore snapshot in Linux
• Kali Linux adds VM-like snapshot feature to bare-metal installs

Raspberry Pi

• Easy backups and snapshots of a running system with LVM