==== Checking that Elasticsearch is running

You can test that your Elasticsearch node is running by sending an HTTP
request to port `9200` on `localhost`:

[source,console]
--------------------------------------------
GET /
--------------------------------------------

which should give you a response something like this:

["source","js",subs="attributes,callouts"]
--------------------------------------------
{
  "name" : "Cp8oag6",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "AT69_T_DTp-1qgIJlatQqA",
  "version" : {
    "number" : "{version_qualified}",
    "build_flavor" : "{build_flavor}",
    "build_type" : "{build_type}",
    "build_hash" : "f27399d",
    "build_date" : "2016-03-30T09:51:41.449Z",
    "build_snapshot" : false,
    "lucene_version" : "{lucene_version}",
    "minimum_wire_compatibility_version" : "1.2.3",
    "minimum_index_compatibility_version" : "1.2.3"
  },
  "tagline" : "You Know, for Search"
}
--------------------------------------------
// TESTRESPONSE[s/"name" : "Cp8oag6",/"name" : "$body.name",/]
// TESTRESPONSE[s/"cluster_name" : "elasticsearch",/"cluster_name" : "$body.cluster_name",/]
// TESTRESPONSE[s/"cluster_uuid" : "AT69_T_DTp-1qgIJlatQqA",/"cluster_uuid" : "$body.cluster_uuid",/]
// TESTRESPONSE[s/"build_hash" : "f27399d",/"build_hash" : "$body.version.build_hash",/]
// TESTRESPONSE[s/"build_date" : "2016-03-30T09:51:41.449Z",/"build_date" : $body.version.build_date,/]
// TESTRESPONSE[s/"build_snapshot" : false,/"build_snapshot" : $body.version.build_snapshot,/]
// TESTRESPONSE[s/"minimum_wire_compatibility_version" : "1.2.3"/"minimum_wire_compatibility_version" : $body.version.minimum_wire_compatibility_version/]
// TESTRESPONSE[s/"minimum_index_compatibility_version" : "1.2.3"/"minimum_index_compatibility_version" : $body.version.minimum_index_compatibility_version/]
// So much s/// but at least we test that the layout is close to matching....
