bootstrap.sh

multipass launch -n testvm -mem --cpu 1 --disk 5G --memory 2G 22.04 --cloud-init ~/.config/cloud-init.yml -v
ip_addr=$(multipass info testvm | awk '/IPv4/ {print $NF}')
ssh "ubuntu@${ip_addr}"

cloud-init.yml

# cloud-config

output: {all: '| tee -a /var/log/cloud-init-output.log'}  # stored inside vm

timezone: "Etc/UTC"

# RHEL/CentOS
# manage-resolv-conf: true
# resolv_conf:
#   nameservers:
#     - '1.1.1.1'
#     - '1.0.0.1'

# TODO: debug nameservers
# Debian/Ubuntu (netplan)
network:
  version: 2
  ethernets:
    eno1:
      dhcp4: true
      nameservers:
          addresses: [1.1.1.1, 1.0.0.1]

package_update: true                # default: true
package_upgrade: false              # default: false
package_reboot_if_required: true

apt:
  sources:
    docker.list:
      source: deb [arch=amd64] https://download.docker.com/linux/ubuntu $RELEASE stable
      keyid: 9DC858229FC7DD38854AE2D88D81803C0EBFCD88

packages:
  - apt-transport-https
  - bash-completion
  - ca-certificates
  - curl
  - docker-ce
  - docker-ce-cli
  - gnupg-agent
  - python3
  - python3-pip
  - software-properties-common
  - ssh-import-id
  - tree
  - vim

users:
  - default
  - name: ubuntu
    gecos: Ubuntu
    sudo: ['ALL=(ALL) NOPASSWD:ALL']
    home: /home/ubuntu
    groups: [adm, audio, cdrom, docker, libvirt, lxd, netdev, sudo]
    lock_passwd: true
    shell: /bin/bash
    no_ssh_fingerprints: true
    ssh_authorized_keys:
      - ssh-rsa AAAABBBCCCDDDEEE== username@hostname

write_files:
  - path: /home/ubuntu/.bashrc
    content: |
      # custom

      alias update='sudo apt update && sudo apt upgrade && sudo apt dist-upgrade && sudo apt autoremove && sudo apt auto-clean'
    append: true
  - path: /home/ubuntu/.bash_profile
    content: |
      [[ -s ~/.bashrc ]] && source ~/.bashrc
  - path: /etc/systemd/system/container.service
    owner: root:root
    permissions: '0755'
    content: |
        [Unit]
        Description=Run container
        Requires=docker.service
        After=docker.service

        [Service]
        Restart=always
        ExecStartPre=-/usr/bin/docker rm container
        ExecStart=/usr/bin/docker run --rm --name container hello-world
        ExecStop=/usr/bin/docker stop -t 2 container

runcmd:
  - systemctl start container
  - systemctl enable container

final_message: "The system is finally up, after $UPTIME seconds"