Issue

• ES containers do not come up (in crash loop) with the following output:

[2017-09-21 19:09:40,650][INFO ][container.run            ] Begin Elasticsearch startup script
--
  | [2017-09-21 19:09:40,663][INFO ][container.run            ] Comparing the specified RAM to the maximum recommended for Elasticsearch...
  | [2017-09-21 19:09:40,664][INFO ][container.run            ] Inspecting the maximum RAM available...
  | [2017-09-21 19:09:40,668][INFO ][container.run            ] ES_HEAP_SIZE: '1024m'
  | [2017-09-21 19:09:40,669][INFO ][container.run            ] Setting heap dump location /elasticsearch/persistent/heapdump.hprof
  | [2017-09-21 19:09:40,672][INFO ][container.run            ] Checking if Elasticsearch is ready on https://localhost:9200
  | Exception in thread "main" java.lang.IllegalArgumentException: Unknown Discovery type [kubernetes]
  | at org.elasticsearch.discovery.DiscoveryModule.configure(DiscoveryModule.java:100)
  | at <<<guice>>>
  | at org.elasticsearch.node.Node.<init>(Node.java:213)
  | at org.elasticsearch.node.Node.<init>(Node.java:140)
  | at org.elasticsearch.node.NodeBuilder.build(NodeBuilder.java:143)
  | at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:194)
  | at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:286)
  | at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:45)
  | Refer to the log for complete error details.