Added node exporter support to Metrics Plugin (#8020)

Author: cwarnermm

source/scale/collect-performance-metrics.rst

@@ -10,7 +10,7 @@ Download and share the collected data with Mattermost to understand application
 
 .. tip::
 
-   Already have Prometheus and Grafana deployed? You can :doc:`use these tools to monitor performance of your Mattermost deployment </scale/deploy-prometheus-grafana-for-performance-monitoring>`.
+  Already have Prometheus and Grafana deployed? You can :doc:`use these tools to monitor performance of your Mattermost deployment </scale/deploy-prometheus-grafana-for-performance-monitoring>`.
 
 Mattermost configuration
 ------------------------
@@ -62,4 +62,4 @@ You can also use our `Mattermost Performance Monitoring v2 <https://grafana.com/
 What's collected?
 -----------------
 
-Mattermost provides :ref:`custom metrics <scale/performance-monitoring-metrics:custom Mattermost metrics>` and :ref:`standard Go metrics <scale/performance-monitoring-metrics:standard go metrics>` that can be used to monitor your system's performance.
+Mattermost provides :ref:`custom metrics <scale/performance-monitoring-metrics:custom Mattermost metrics>` and :ref:`standard Go metrics <scale/performance-monitoring-metrics:standard go metrics>` that can be used to monitor your system's performance. Additionally Enterprise customers can use the Metrics plugin to collect :ref:`host/system metrics <scale/performance-monitoring-metrics:host/system metrics>` from `node exporter <https://github.com/prometheus/node_exporter>`_ targets to monitor network-related panels for Mattermost Calls.

source/scale/performance-monitoring-metrics.rst

@@ -147,7 +147,6 @@ Use ``mattermost_system_server_start_time`` to dynamically add an annotation cor
 .. image:: ../images/mattermost_system_server_start_time.png
    :alt: Example debugging metrics, including number of messages per second, in a self-hosted Mattermost deployment.
 
-
 Debugging metrics - jobs
 ~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -229,7 +228,6 @@ Web app metrics
 - ``mattermost_webapp_team_switch``: Duration of the time taken from when a user clicks on a team in the LHS to when posts in that team become visible (seconds).
 - ``mattermost_webapp_time_to_first_byte``: Duration from when a browser starts to request a page from a server until when it starts to receive data in response (seconds).
 
-
 Standard Go metrics
 --------------------
 
@@ -268,6 +266,14 @@ where you can replace ``localhost`` with the server name. The profiling reports
 .. image:: ../images/perf_monitoring_go_metrics.png
    :alt: Example Go metrics for HTTP server runtime profiling data and system monitoring, including memory usage, Go routines, and garbage collection duration, in a self-hosted Mattermost deployment.
 
+Host/system metrics
+--------------------
+
+.. include:: ../_static/badges/ent-cloud-selfhosted.rst
+  :start-after: :nosearch:
+
+From Metrics Plugin v0.7.0, you can pull metrics from `node exporter <https://github.com/prometheus/node_exporter>`_ targets to access network-related panels for Mattermost Calls.
+
 Frequently asked questions
 --------------------------