//////////////////////////////////////////////////////////////////////////
//// This content is shared by all Elastic Beats. Make sure you keep the
//// descriptions here generic enough to work for all Beats that include
//// this file. When using cross references, make sure that the cross
//// references resolve correctly for any files that include this one.
//// Use the appropriate variables defined in the index.asciidoc file to
//// resolve Beat names: beatname_uc and beatname_lc.
//// Use the following include to pull this content into a doc file:
//// include::../../libbeat/docs/shared-config-ingest.asciidoc[]
//////////////////////////////////////////////////////////////////////////

[[configuring-ingest-node]]
== Parse data by using ingest node

When you use Elasticsearch for output, you can configure {beatname_uc} to use
{elasticsearch}/ingest.html[ingest node] to pre-process documents before the
actual indexing takes place in Elasticsearch. Ingest node is a convenient
processing option when you want to do some extra processing on your data, but
you do not require the full power of Logstash. For example, you can create an
ingest node pipeline in Elasticsearch that consists of one processor that
removes a field in a document followed by another processor that renames a
field.

After defining the pipeline in Elasticsearch, you simply configure {beatname_uc}
to use the pipeline. To configure {beatname_uc}, you specify the pipeline ID in
the `parameters` option under `elasticsearch` in the +{beatname_lc}.yml+ file:

[source,yaml]
------------------------------------------------------------------------------
output.elasticsearch:
  hosts: ["localhost:9200"]
  pipeline: my_pipeline_id
------------------------------------------------------------------------------

For example, let's say that you've defined the following pipeline in a file
named `pipeline.json`:

[source,json]
------------------------------------------------------------------------------
{
    "description": "Test pipeline",
    "processors": [
        {
            "lowercase": {
                "field": "beat.name"
            }
        }
    ]
}
------------------------------------------------------------------------------

To add the pipeline in Elasticsearch, you would run:

[source,shell]
------------------------------------------------------------------------------
curl -H 'Content-Type: application/json' -XPUT 'http://localhost:9200/_ingest/pipeline/test-pipeline' -d@pipeline.json
------------------------------------------------------------------------------

Then in the +{beatname_lc}.yml+ file, you would specify:

[source,yaml]
------------------------------------------------------------------------------
output.elasticsearch:
  hosts: ["localhost:9200"]
  pipeline: "test-pipeline"
------------------------------------------------------------------------------

When you run {beatname_uc}, the value of `beat.name` is converted to lowercase before indexing.

For more information about defining a pre-processing pipeline, see the
{elasticsearch}/ingest.html[Ingest Node] documentation.