title: How to check Elasticsearch cluster health?
body: <p>I tried to check it via </p>
  
  <pre><code>curl -XGET 'http://localhost:9200/_cluster/health'
  </code></pre>
  
  <p>but nothing happened. Seems it's waiting for something. The console did not come back. Had to kill it with CTRL+C.</p>
  
  <p>I also tried to check for existing indices via</p>
  
  <pre><code>curl -XGET 'http://localhost:9200/_cat/indices?v'
  </code></pre>
  
  <p>Same behavior as above. </p>