https://grafana.com/grafana/download/9.1.6
https://dl.k8s.io/v1.15.1/kubernetes-node-linux-amd64.tar.gz
https://dl.k8s.io/v1.15.1/kubernetes-server-linux-amd64.tar.gz
https://github.com/coreos/flannel/releases/download/v0.11.0/flannel-v0.11.0-linux-amd64.tar.gz
https://github.com/etcd-io/etcd/releases/download/v3.3.10/etcd-v3.3.10-linux-amd64.tar.gz