Proxmox Extend Host Disk

proxmox_extend_disk.sh

###
###  Extend Host Disk Partition
###

# https://command-not-found.com/growpart
# https://forum.proxmox.com/threads/change-host-disks-how-resize-partition.90729/

apt-get install cloud-utils
growpart /dev/sda 3
pvresize /dev/sda3
# Extend Data LVM-Thin
lvextend -l +50%FREE pve/data
# Extend Root "Directory"
lvextend -L +20G pve/root
resize2fs /dev/pve/root

###
###  Extend VM Disk
###

# https://pve.proxmox.com/wiki/Resize_disks#qm_command

GUI: VM > Hardware > Hard Disk > Disk Action > Resize 

# - or -

qm disk resize <vmid> <disk>  <size> 
qm disk resize  100   virtio0  +5G

# VM should auto extend the disk locally after a reboot.

# Other ways to extend but not the best: v
# Don't forget to ensure there's enough space on lvm-thin
lvextend -L +12.7G /dev/pve/vm-100-disk-1
# Resize2f needs to be run from inside the VM
# In the case of HomeAssistant, the disk gets extended automatically at boot.

###
###  Disk Management 101
###

# https://www.tecmint.com/extend-and-reduce-lvms-in-linux/
fdisk -l /dev/sda
lsblk
pvs
pvs --segments -v
pvscan
vgs
vgdisplay
lvs
lvs -v
lvs --segments (-v)
lvdisplay
lvdisplay -m # show Segments
lvdisplay /dev/pve/vm-100-disk-1
sfdisk -l /dev/pve/vm-100-disk-1
sfdisk -d /dev/pve/vm-100-disk-1

# Extend Volume Group size
vgextend vg_tecmint /dev/sda1
pvcreate /dev/sda1

# Check fs for errors
e2fsck -n /dev/pve/vm-100-disk-1 # Don't make changes
e2fsck -ff /dev/vg_tecmint_extra/tecmint_reduce_test

# lvextend is used specifically to increase the size of a logical volume.
lvextend -L +20G /dev/vgname/lvname

# Reducing size
lvreduce --resizefs -L 7.2G /dev/pve/vm-100-disk-1
lvreduce -L -8G /dev/vg_tecmint_extra/tecmint_reduce_test
# lvresize: Can increase & decrease. Very versatile but dangeruos!
lvresize -L -20G /dev/vgname/lvname # reduce size with 20GB

# List VM disk partitions
sfdisk -l /dev/pve/vm-100-disk-1
# Backup VM partition table
sfdisk -d /dev/pve/vm-100-disk-1 > partition-table-backup.txt
# Restore VM partition layout
sfdisk /dev/pve/vm-100-disk-1 < partition-table-backup.txt

# LVM Table Backups
ls -l /etc/lvm/archive
# Manual Backup
vgcfgbackup -f /root/current_pve_config.vg pve
# Restore
vgcfgrestore -f /etc/lvm/archive/pve_00013-1137415304.vg pve

# Deactivate LVM Disk (useful before backup/restore VG or partition table)
lvchange -an /dev/pve/vm-100-disk-1
# Reactivate LVM Disk
lvchange -ay /dev/pve/vm-100-disk-1

# Create & Delete VM disk
lvcreate -L <Size> -n vm-101-disk-0 pve
dd if=/path/to/vm-101-disk-0.img of=/dev/pve/vm-101-disk-0 bs=4M # Restore data to disk
lvremove /dev/pve/vm-101-disk-0-snapshot

###
###  Backup & Restore VM disk to Image
###    [ Manual mode, not recommended ]
###

# Backup VM disk to image file
dd if=/dev/pve/vm-101-disk-0 of=/var/lib/vz/images/vm-101-disk-0.img bs=4M

# Restore
lvcreate -L 2G -n vm-101-disk-0 pve
dd if=/root/vm-101-disk-0.img of=/dev/pve/vm-101-disk-0 bs=4M


###
###  VM & LXC Configuration
###

vim /etc/pve/nodes/dell-5070/qemu-server/100.conf
# ^- disk size configured here
vim /etc/pve/nodes/dell-5070/lxc/101.conf