Cloud init for setting up Docker

docker.yaml

#cloud-config
groups:
  - docker

users:
  - default
  - name: dockeradm
    sudo:  ALL=(ALL) NOPASSWD:ALL
    groups: users, docker
    ssh_authorized_keys:
      - ssh-rsa yourPublicSSHKey

package_update: true

packages:
  - apt-transport-https
  - ca-certificates
  - curl
  - gnupg-agent
  - software-properties-common

runcmd:
  - curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add -
  - add-apt-repository "deb [arch=$(dpkg --print-architecture)] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
  - apt-get update -y
  - apt-get install -y docker-ce docker-ce-cli containerd.io
  - systemctl start docker
  - systemctl enable docker

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