Updated tutorial to support Elastic Agent

docs/maps/asset-tracking-tutorial.asciidoc

@@ -8,7 +8,7 @@ In this tutorial, you’ll look at live urban transit data from the city of Port
 
 You’ll learn to:
 
-- Use {filebeat} to ingest the TriMet REST API into Elasticsearch.
+- Use the Elastic Agent to ingest the TriMet REST API into Elasticsearch.
 - Create a map with layers that visualize asset tracks and last-known locations.
 - Use symbols and colors to style data values and show which direction an asset is heading.
 - Set up tracking containment alerts to monitor moving vehicles.
@@ -23,11 +23,11 @@ image::maps/images/asset-tracking-tutorial/construction_zones.png[]
 
 - If you don’t already have {kib}, set it up with https://www.elastic.co/cloud/elasticsearch-service/signup?baymax=docs-body&elektra=docs[our free trial]. Download the deployment credentials.
 - Obtain an API key for https://developer.trimet.org/[TriMet web services] at https://developer.trimet.org/appid/registration/.
-- https://www.elastic.co/guide/en/beats/filebeat/current/filebeat-installation-configuration.html[Install Filebeat].
+- {fleet-guide}/fleet-overview.html[Fleet] is enabled on your cluster, and one or more {fleet-guide}/elastic-agent-installation.html[Elastic Agents] is enrolled.
 
 [float]
 === Part 1: Ingest the Portland bus data
-To get to the fun of visualizing and alerting on Portland buses, you must first create a {filebeat} input to ingest the TriMet Portland bus data into {es}.
+To get to the fun of visualizing and alerting on Portland buses, you must first add the 'Custom API' integration to an Elastic Agent policy to get the TriMet Portland bus data into {es}.
 
 [float]
 ==== Step 1: Set up an Elasticsearch index
@@ -270,47 +270,39 @@ PUT _ingest/pipeline/tri_met_tracks
 ----------------------------------
 
 [float]
-==== Step 2: Start {filebeat}
+==== Step 2: Configure Elastic Agent
 
-. Replace the contents in your `filebeat.yml` file with the following:
-+
-[source,yaml]
-----------------------------------
-filebeat.inputs:
-# Fetch trimet bus data every minute.
-- type: httpjson
-  interval: 1m
-  request.url: "https://developer.trimet.org/ws/v2/vehicles?appID=<tri_met_app_id>"
-  response.split:
-    target: body.resultSet.vehicle
-  processors:
-    - decode_json_fields:
-        fields: ["message"]
-        target: "trimet"
+. From the {kib} main menu, click *Fleet*, then the *Agent policies* tab.
 
-  pipeline: "tri_met_tracks"
+. Click the name of the agent policy where you want to add the *Custom API* integration to. The configuration changes you make only apply to the policy you select.
 
+. Click the name of the *Custom API* integration, or add the integration first if the agent policy does not yet have it.
 
-# ---------------------------- Elastic Cloud Output ----------------------------
-cloud.id: <cloud_id>
-cloud.auth: <username:password>
+. From the *Edit Custom API integration* page, expand the *Change defaults* section.
 
-----------------------------------
+. Set the *Dataset name* to *httpjson.trimet*.
+
+. Set the *Ingest Pipeline* to *tri_met_pipeline*.
 
-. Replace `<tri_met_app_id>` with your TriMet application id.
-. Replace `<username:password>` with your Elastic Cloud deployment credentials.
-. Replace `<cloud_id>` with your {ece}/ece-cloud-id.html[elastic cloud id].
-. Open a terminal window, and then navigate to the {filebeat} folder.
-. In your `filebeat` folder, run {filebeat} with the edited config:
+. Set the *Request URL* to *https://developer.trimet.org/ws/v2/vehicles?appID=<tri_met_app_id>*.
+
+. Set *Response Split* to *target: body.resultSet.vehicle*.
+
+. At the bottom of the configuration expand *Advanced options*.
+
+. Set *Processors* to:
 +
-[source,bash]
+[source,yaml]
 ----------------------------------
-/bin/filebeat -c filebeat.yml
+- decode_json_fields:
+    fields: ["message"]
+    target: "trimet"
 ----------------------------------
 
-. Wait for {filebeat} to start shipping data to Elastic Cloud. {filebeat} should not produce any output to stdout. 
+. Leave everything else as defaults.
+
+. Click *Save integration*, this will deploy the configuration to any Agents with the policy assigned.
 
-. Leave the terminal window open and {filebeat} running throughout this tutorial.
 
 [float]
 ==== Step 3: Create a data view for the tri_met_tracks {es} index