Add documentation about Windows NPM setup

README.md

@@ -194,6 +194,19 @@ With the [`ini_setting` module](https://forge.puppet.com/modules/puppetlabs/inif
 
 5. Verify your Puppet data is in Datadog by searching for `sources:puppet` in the [Event Stream][5].
 
+### NPM setup
+
+To enable the Datadog Agent Network Performance Monitoring (NPM) features follow these steps:
+
+1. (Windows only) Pass the `windows_npm_install` option with value `true` to the `datadog::datadog_agent` class.
+2. Use the `datadog_agent::system_probe` class to properly create the configuration file:
+
+```conf
+class { 'datadog_agent::system_probe':
+    enabled => true, 
+}
+```
+
 ### Troubleshooting
 
 You can run the Puppet Agent manually to check for errors in the output:
@@ -281,6 +294,7 @@ These variables can be set in the `datadog_agent` class to control settings in t
 | `scrub_args`                            | A boolean to enable the process cmdline scrubbing (defaults to true).                                                                                                                            |
 | `custom_sensitive_words`                | An array to add more words beyond the default ones used by the scrubbing feature (defaults to `[]`).                                                                                             |
 | `logs_enabled`                          | A boolean to enable the logs Agent (defaults to false).                                                                                                                                          |
+| `windows_npm_install`                   | A boolean to enable the Windows NPM driver installation (defaults to false)                                                                                                                      |
 | `container_collect_all`                 | A boolean to enable logs collection for all containers.                                                                                                                                          |
 | `agent_extra_options`<sup>1</sup>       | A hash to provide additional configuration options (Agent v6 and v7 only).                                                                                                                       |
 | `hostname_extraction_regex`<sup>2</sup> | A regex used to extract the hostname captured group to report the run in Datadog instead of reporting the Puppet nodename, for example:<br>`'^(?<hostname>.*\.datadoghq\.com)(\.i-\w{8}\..*)?$'` |

manifests/init.pp

@@ -233,6 +233,11 @@
 #   $apt_release
 #       The distribution channel to be used for the APT repo. Eg: 'stable' or 'beta'.
 #       String. Default: stable
+#   $windows_npm_install
+#       (Windows only) Boolean to install the Windows NPM driver.
+#       To use NPM features it is necessary to enable install through this flag, as well as
+#       configuring NPM through the datadog::system_probe class.
+#       Boolean. Default: false
 #
 # Sample Usage:
 #

manifests/system_probe.pp

@@ -1,3 +1,10 @@
+# Class: datadog_agent::system_probe
+#
+# This class contains the Datadog agent system probe (NPM) configuration.
+# On Windows, install the NPM driver by setting 'windows_npm_install' 
+# to 'true on the datadog_agent class.
+#
+
 class datadog_agent::system_probe(
   Boolean $enabled = false,
   Boolean $network_enabled = false,