$os = "centos" $box = "centos/7" $num_instances = 9 $kube_node_instances = $num_instances $etcd_instances = 1 $kube_master_instances = 1 $kube_node_instances_with_disks = true $kube_node_instances_with_disks_size = "20G" $kube_node_instances_with_disks_number = 2