Installing Elasticsearch

The Elasticsearch is a highly scalable open source full-text search and analytics engine. The feature allows you to store, search, and analyze large volumes of data quickly. The Elasticsearch feature is generally used as the underlying engine or technology that powers applications that have complex search features and requirements.

1. Download and extract the Elasticsearch.
2. Set some Operating System level parameters. The following two properties are more commonly set.

   Max virtual memory [vm.max_map_count]

   Needs to be increased to the value of at least 262144. For more information, see Virtual memory.

   Max file descriptors

   Needs to be increased to the value of at least 65536. For more information, see File Descriptors.

3. Create a dedicated system user to run Elasticsearch service.
4. Run Elasticsearch service by using the following command.

   ./bin/elasticsearch

5. Verify that the search service is running through the <http://localhost:9200> URL.

   {
     "name" : "<name>",
     "cluster_name" : "<should match the cluster name specified in the elasticsearch.yml file>",
     "cluster_uuid" : "CxrC0eL4S4yqi-iVCPbXlA",
     "version" : {
       "number" : "x.x.x",
       "build_flavor" : "default",
       "build_type" : "zip",
       "build_hash" : "81a1e9eda8e6183f5237786246f6dced26a10eaf",
       "build_date" : "2020-05-12T02:01:37.602180Z",
       "build_snapshot" : false,
       "lucene_version" : "8.5.1",
       "minimum_wire_compatibility_version" : "6.8.0",
       "minimum_index_compatibility_version" : "6.0.0-beta1"
     },
     "tagline" : "You Know, for Search"
   }