LXD Ubuntu VM launch and disk resize

launch_vm.sh

#!/bin/env bash

set -e

readonly VM="banana"
readonly CPU="8"
readonly MEM="8GB"
readonly DSK="120GB"

lxc init images:ubuntu/focal ${VM} -p default -p vm --vm
lxc config set ${VM} limits.cpu ${CPU}
lxc config set ${VM} limits.memory ${MEM}
lxc config device override ${VM} root size=${DISK}
lxc start ${VM}

sleep 10  # `lxc start` needs a `--wait`.

lxc exec ${VM} -- apt update
lxc exec ${VM} -- apt install cloud-initramfs-growroot -y
lxc exec ${VM} -- growpart /dev/sda 2
lxc exec ${VM} -- resize2fs /dev/sda2

vm-lxd-profile.yaml

config:
  user.user-data: |
    apt_mirror: http://us.archive.ubuntu.com/ubuntu/
    ssh_pwauth: yes
    users:
      - name: ubuntu
        passwd: "\$6\$s.wXDkoGmU5md\$d.vxMQSvtcs1I7wUG4SLgUhmarY7BR.5lusJq1D9U9EnHK2LJx18x90ipsg0g3Jcomfp0EoGAZYfgvT22qGFl/"
        lock_passwd: false
        groups: lxd
        shell: /bin/bash
        sudo: ALL=(ALL) NOPASSWD:ALL

    growpart:
      mode: auto
      devices:
        - '/'
        - '/dev/sda'
        - '/dev/sda2'
      ignore_growroot_disabled: false
description: VN profile
devices:
  config:
    source: cloud-init:config
    type: disk
  eth0:
    nictype: bridged
    parent: lxdbr0
    type: nic
  root:
    path: /
    pool: default
    size: 100GB
    type: disk
name: vm

For newer LXD versions (5.8 and LTS 5.0.2) you can use the -d flag to increase the disk size of LXD virtual machines:

lxc launch "images:ubuntu/jammy/cloud" jammy --vm -c limits.cpu=4 -c limits.memory=8GiB -d root,size=50GiB

I tested this with version 5.0.2-838e1b2 👍

See also:

• https://discuss.linuxcontainers.org/t/lxd-5-8-has-been-released/15686#device-override-on-init-and-launch-4
• https://discuss.linuxcontainers.org/t/lxd-vm-how-to-set-disk-size/7566/6

When I try to apply the above mentioned profile sudo lxc launch images:ubuntu/22.04 w1 -p myprofile the commands inside user.user-data do not get applied. My custom limits like cpus and RAM is respected but root size and installing packages defined within user.user-data do not work. I am using lxd 5.10. Do you guys have any experience with this kind of error?

Is there a way in the profile to have the VM be configured with LVM partitioning?

Something like this (as an example):

profiles:
  - name: lma-vm
    config:
      limits.cpu: "2"
      limits.memory: 16GB
      security.secureboot: "false"
    description: "LVM Configuration for LMA Platform"
    devices:
      root:
        path: /
        pool: default
        size: 80GB
        type: disk
      eth0:
        name: eth0
        nictype: bridged
        parent: lxdbr0
        type: nic
      storage:
        config:
          ptable: gpt
          path: /dev/sda
          wipe: superblock-recursive
          preserve: false
          grub_device: true
          type: disk
          id: disk-sda
          partitions:
            - number: 1
              device: disk-sda
              flag: bios_grub
              size: 1M
              id: bios-grub
              type: partition
            - number: 2
              device: disk-sda
              flag: boot
              size: 1G
              id: sda-boot
              type: partition
            - number: 3
              device: disk-sda
              size: -1
              id: sda-lvm
              type: lvm_volgroup
              name: vg00
              devices: [sda-lvm]
              partitions:
                - id: lvroot
                  name: lvroot
                  size: 20G
                  type: lvm_partition
                  volgroup: vg00