Monitor Network Device Health Using Grafana

You can run queries from the Grafana UI. For more information, see Query a Data Source.

When you create a chart, the data is rendered from the TSDB database. The TSDB database library (shim) is based on InfluxDB, an open-source time series database. Information sent to and received from the TSDB database is in the InfluxDB format. Paragon Automation also supports Grafana's open source InfluxDB plug-in. After you run a query from the Grafana UI, the open-source InfluxDB sends a back-end request to the Paragon Automation TSDB. The Paragon Automation TSDB sends the response in InfluxDB format.

In earlier releases, when you run a query from the Grafana UI using influxDB as a data source, you can only view data of a specific device in a device group. You use syntax parameters such as FROM and SELECT that the influxDB recognizes. You cannot view aggregate data of a device group, or view aggregate data of multiple device groups using the influxDB plug-in. However, Paragon Automation also supports the Juniper Paragon Insights TSDB plug-in.

This plug-in is installed when you install Paragon Automation. The Juniper Paragon Insights TSDB plug-in is based on the influxDB plug-in but also supports the ability to view aggregate data of a device group, or view aggregate data of multiple device groups. You can view aggregate data by using syntax parameters such as DEVICE, DEVICE GROUPS, and MEASUREMENT. The default data source for Paragon Insights in Grafana is based on the Juniper Paragon Insights TSDB plug-in.

For more information on supported syntax parameters, see Table 1.

Table 1: Examples of InfluxDB and TSDB Syntax Parameters

InfluxDB Querying Options	TSDB Querying Options
FROM—Select the data source (device, device group, topic/rule).	DEVICE—Select one or more than one device for this query.
SELECT—Select the data field, and apply aggregation and transformation types to the data.	DEVICE GROUP—Select one or more than one device group for this query.
GROUP BY—Specify how to group data based on KPI keys.	MEASUREMENT—Select the Paragon Insights topic or rule name.
FORMAT AS—Specify if you want to format as table, time series, or log.	FIELDS—Select the fields to which you want to apply the aggregation.
	WHERE—Filter data based on tags and fields.
	GROUP BY—Specify how to group data based on KPI keys.
	FORMAT AS—Specify if you want to format as table, time series, or log.
	PER DEVICE LIMIT—Set the per-device limit of the base query for each device (database) that you have selected.
	AGGREGATED LIMIT—Set the aggregate limit for the device (databases) after the base query is run.
	AGGREGATED LIMIT—Rename a field. For example, if you select mean as an aggregation function for a field named bps, you can give it an alias name called mean_bps.

You can view pre-populated graphs from the Grafana dashboard.

You can view pre-populated graphs from the Dashboards section of the Grafana Home page. You can also view these pre-populated graphs by clicking Dashboard>Manage>Paragon Insights Cluster Health. The following graphs are available by default:

• CPU Usage—View cluster-wise or node-wise information on CPU (%) usage at different levels.
• Disk Read Usage (r_await)—View cluster-wise or node-wise information on average time taken for disk reads to be served.
• Disk Write Usage (w_await)—View cluster-wise or node-wise information on average time taken for disk writes to be served.
• Node Memory Available—View information on free memory available on a node in a selected cluster.

Click the name of a graph to view more information of that graph. You can view a pre-populated graph of all nodes in a cluster at a time, and also view pre-populated graphs of one or more nodes in a cluster.