Can any one help how to index images to an elasticsearch cluster.
What exactly do you want to accomplish with this? If you're looking for functionality such as auto recognizing people, places, etc in images then you may have to look at external tools. Elasticsearch is a text search engine - not an image search engine.
If you're looking to do something else please describe what you want to accomplish in much greater detail.
Also have a look at https://github.com/kzwang/elasticsearch-image but it has not been updated for a while.