title: SettingUp ElasticSearch Logstash
body: <p>I am trying to setup a LogStash/Redis/ElasticSearch pipeline for centralized logging,I have a few questions,</p>
  
  <ol>
  <li><p>I believe for this to work, you need a specific version of elasticsearch &amp; logstash, is there a place where I can find a one-to-one mapping as to what versions of elasticsearch &amp; logstash gel together.</p></li>
  <li><p>This might sound very silly but, in the <code>elasticsearch.yml</code> file all lines start with <code>#</code>, do I need to get rid of the <code>#</code> for some minimum values.</p></li>
  <li><p>Lastly I set up the whole pipeline, but I see the following error,</p>
  
  <pre><code>NativeException - org.elasticsearch.cluster.block.ClusterBlockException: blocked by: [SERVICE_UNAVAILABLE/1/state not recovered / initialized];[SERVICE_UNAVAILABLE/2/no master];:
      org/elasticsearch/cluster/block/ClusterBlocks.java:138:in `globalBlockedException'
      org/elasticsearch/cluster/block/ClusterBlocks.java:128:in `globalBlockedRaiseException'
  </code></pre></li>
  </ol>
  
  <p>Also I installed the elasticsearch head plugin, but it fails to load up, all I see is a spinning wheel in the Chrome tab.</p>