Elasticsearch has a very rich set of plugins, mainly community driven, which are really helpful to analyze the cluster, and execute full-text structural queries easily.
Let's look at a few of the plugins.
This plugin was developed by Lukas Vlcek. It helps analyze the nodes across the cluster with the help of live charts and various statistics related to JVM, CPU, and OS, and about shards and their replicas.
More information is available at https://github.com/lukas-vlcek/bigdesk.
The following screenshot shows the Bigdesk plugin:
The Elastic-Hammer plugin acts as a frontend for Elasticsearch. It helps query the cluster and provides syntax checking while typing queries as well.
More details can be found here: https://github.com/andrewvc/elastic-hammer.
Head plugins are capable of generating statistics of the cluster, as well as providing browsing, and performing structured queries on Elasticsearch indices.
More details can be found here: https://github.com/mobz/elasticsearch-head.
There are many more plugins available that are supported by Elasticsearch or by the community and they play an important role while interacting with Elasticsearch.
You can easily check the list of available plugins here:
https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-plugins.html#_plugins