1) Install Elastic search server first. Ensure Java is installed in your machine.
a) Download the latest version from here:
http://www.elasticsearch.org/download/
b) Based on the OS, you can use the corresponding file. For windows get the zip file and unzip to a folder say ES_INSTALL_DIR
c) Install the Elasticsearch DeleteByQuery plugin: ES_INSTALL_DIR/bin/plugin install delete-by-query
d) Run elasticsearch.bat (if in windows) from ES_INSTALL_DIR/bin
2) Add the following lines to the portal-ext.properties file which point to the correct ip address and port of elastic search server. Restart liferay.
elasticsearch.serverIP=127.0.0.1
elasticsearch.portNumber=9300
elasticsearch.cluster.name=elasticsearch
3) Download the Elasticray source from here and deploy the plugin in your Liferay installation.
4) Once the installation is done, Do a "Reindex all search indexes" on from control panel -> Server Administration
https://github.com/R-Knowsys/elasticray/wiki
Development is complete and v1.3 is released. Download Here It has been submitted to the Liferay Marketplace.