Installing additional script plugins

Elasticsearch provides native scripting (a Java code compiled in JAR) and Painless, but a lot of interesting languages are available, such as JavaScript and Python.

As previously stated, the official language is now Painless, and this is provided by default in Elasticsearch for better sandboxing and performance.

Note

Other scripting languages can be installed as plugins, thus they are now deprecated. We will present them in this recipe as they have a large user base.

Getting ready

You need an up-and-running Elasticsearch installation as we described in the Downloading and installing Elasticsearch recipe in Chapter 2, Downloading and Setup.

How to do it...

To install JavaScript language support for Elasticsearch, we will perform the following steps:

1. From the command line, simply call the following command:

           bin/elasticsearch-plugin install lang-javascript
   

2. It will print the following output:

               -> Downloading lang-javascript from elastic
        ...