title: Scalling down elasticsearch cluster
body: <p>First of all, I would like to mention that I am not Elasticsearch expert.</p>
  
  <p>I have a 3 node elasticsearch cluster. The utilization of the resources are not proportional to cost. So I have decided to reduce 2 nodes.</p>
  
  <p>Now I am thinking what is the gracious way to kill 2 node out of 3 without downtime? What can be consequences?</p>
  
  <p>I can not compeltely shut it down the whole cluster. Running Elasticsearch version: 5.6.8</p>
  
  <p>Any help or suggestion will be really appreciated.</p>