docker.json

{
  "builders": [{
      "type": "openstack",
      "image_name": "ubuntu_k8s_K8SVERSION_docker",
      "source_image": "SOURCE_ID",
      "flavor": "FLAVOR",
      "floating_ip_pool": "FLOATING-NET",
      "networks": "NETWORK",
      "security_groups": ["default","SECGROUP"],
      "ssh_username": "SSHUSER"
    }
  ],
  "provisioners": [{
    "type": "shell",
    "inline": [
      "sleep 30",
      "sudo apt-get update",
      "sudo apt-get upgrade -y",
      "sudo apt-get install -y apt-transport-https curl",
      "echo 'deb https://apt.kubernetes.io/ kubernetes-xenial main' | sudo tee /etc/apt/sources.list.d/kubernetes.list",
      "curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -",
      "sudo apt-get update",
      "sudo apt-get install -y kubelet=K8SVERSION-00 kubeadm=K8SVERSION-00 kubectl=K8SVERSION-00",
      "sudo apt-mark hold kubelet kubeadm kubectl"
    ]
  },{
    "type": "shell",
    "inline": [
      "sudo apt-get install -y docker.io",
      "sudo apt-mark hold docker.io",
      "sudo systemctl enable docker",
      "sudo systemctl restart docker"
    ]
  }]
}