title: How to know your on k8s master node?
body: <p>I'm writing some scripts that check the system to make sure of some cluster characteristics.  Things running on private IP address spaces, etc.  These checks are just a manual step when setting up a cluster, and used just for sanity checking.</p>
  
  <p>They'll be run on each node, but I'd like a set of them to run when on the master node.  Is there a bash, curl, kubectl, or another command that has information indicating the current node is a master node?</p>