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This mode of Elasticsearch is not recommended for production environments. You should use it only in development and testing environments. When moving to production, opt for the external mode.
An Elasticsearch node is embedded in the eXo Platform server (and is hosted in the same JVM).
The Elasticsearch node is declared as:
Master: To manage the cluster with only one node.
Data: To index and store documents.
Client: To serve and coordinate requests from the platform.
By default:
The parameter es.cluster.name of the Elasticsearch cluster is exoplatform-es.
The parameter es.network.host is set to 127.0.0.1. This prevents accesses from IP other than localhost and prevents other nodes to join the ES cluster.
The parameter es.http.port is set by default to the port 9200: Elasticseach is bound to port 9200 for HTTP connections.
Elasticsearch Embedded mode properties are configurable through exo.properties file. More details could be found here.
It is also possible to override Elasticsearch embedded mode configuration by using this property in the server startup:
-Dexo.es.embedded.configuration.file=/absolute/path/to/file
Where /absolute/path/to/file is the absolute path the the yml configuration file.