Cerebro is the evolution of the previous Elasticsearch plugin, Elasticsearch Kopf (https://github.com/lmenezes/elasticsearch-kopf) – this doesn't work in Elasticsearch version 5.x or later versions due to the removal of site plugins.
Cerebro is one of the most useful interfaces for looking at shard allocations and executing common index operations through a graphic interface. It's completely open source, and it allows you to add a user, password, or LDAP authentication for accessing the web interface.
Cerebro is a partial rewrite of the previous plugin, and it is available as a self-working application server, based on Scala's Play Framework.
