我正在尝试在aws ec2上设置kubernetes群集，引用http://www.tothenew.com/blog/setup-kubernetes-cluster-on-aws-ec2/
我跑了：
[ec2-user@ip-192-168-1-207 kubernetes]$ export KUBERNETES_PROVIDER=aws
[ec2-user@ip-192-168-1-207 kubernetes]$ bash cluster/kube-up.sh
获取错误：
Attempt 1 to check for SSH to master [ssh to master working]
Attempt 1 to check for salt-master [salt-master not working yet]
Attempt 2 to check for salt-master [salt-master not working yet]
Attempt 3 to check for salt-master [salt-master not working yet]
Attempt 4 to check for salt-master [salt-master not working yet]
Attempt 5 to check for salt-master [salt-master not working yet]
Attempt 6 to check for salt-master [salt-master not working yet]
Attempt 7 to check for salt-master [salt-master not working yet]
Attempt 8 to check for salt-master [salt-master not working yet]
Attempt 9 to check for salt-master [salt-master not working yet]
Attempt 10 to check for salt-master [salt-master not working yet]
Attempt 11 to check for salt-master [salt-master not working yet]
Attempt 12 to check for salt-master [salt-master not working yet]
请告诉我有什么问题！