$ wget https://github.com/kubernetes/kops/releases/download/1.9.1/kops-linux-amd64
$ chmod 755 kops-linux-amd64
$ ./kops-linux-amd64 create cluster --cloud openstack --zones nova --name my-k8s-cluster
I0607 18:05:17.413479 11646 create_cluster.go:1318] Using SSH public key: /home/ubuntu/.ssh/id_rsa.pub
State Store: Required value: Please set the --state flag or export KOPS_STATE_STORE.
A valid value follows the format s3://<bucket>.
A s3 bucket is required to store cluster state information.
$