text: Each node also runs a simple network proxy that reflects the services that are defined in 
  the API on that node. This feature allows the node to perform simple TCP and UDP stream 
  forwarding across a set of back ends. 
  
  OpenShift Container Platform creates nodes from a cloud provider, physical systems, or 
  virtual systems. Kubernetes interacts with node objects that are a representation of those 
  nodes. The master uses the information from node objects to validate nodes with health 
  checks. A node is ignored until it passes the health checks, and the master continues 
  checking nodes until they are valid. 
  
  **Note:**It is recommended to have more than three master nodes to provide high availability 
  and quorum. 