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ntopng and NetEye Integration Permissions Retention Advanced Topics
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Advanced Topics

Using ntopng with InfluxDB

ntopng can be configured to work with InfluxDB to write and read timeseries data. To configure it, follow the following steps.

  1. Open ntopng from NetEye (Sidebar menu >> ntopng) and then, in ntopng click on the Settings >> Preferences option in the left menu bar.

  2. Now, go to timeseries preference option and configure these settings:

    • Timeseries Driver: InfluxDB 1.x

    • InfluxDB Url: https://<influxdb-domain>:8086 (use HTTPS)

    • InfluxDB Database: <database-name> i.e. ntopng

    In NetEye, InfluxDB is exposed via HTTPS and access requires username/password authentication. When configuring ntopng, always use an https:// URL and enable InfluxDB Authentication in order to enter valid credentials.

  3. If you are using authentication credentials to secure InfluxDB, enable the InfluxDB Authentication option and add the credentials. Default value is disable.

  4. Configure the timeseries options (i.e., Interface Timeseries, Local Hosts Timeseries, Devices Timeseries and Other Timeseries) according to your preferences

  5. Click on Save button to save the preference configuration.

Once done, you will see the folder created under the /neteye/shared/influxdb/data/data/ location. Moreover, logs written successfully will be available when you run journalctl -u influxdb -f, like in this example:

Aug 31 11:02:31 lenovo31 influxd[476]: [httpd] ::1 - - [31/Aug/2020:11:02:31 +0200] "POST /write?db=ntopng  HTTP/1.1" 204 0 "-" "-" 2bd62e84-76f0-11e9-801c-f0761cfbf2d8 8555

The official documentation of ntopng timeseries with influxdb <https://www.ntop.org/guides/ntopng/basic_concepts/timeseries.html#influxdb-driver>`__ contains more information about the preference’s configuration.

Configuring retention for ntopng time series in InfluxDB

The retention of ntopng time series written to InfluxDB can be configured directly from the ntopng UI.

Go to Settings → Preferences → Timeseries, locate the retention / data retention settings for timeseries, set the desired retention, and select Save.

ntopng will apply the retention settings to the timeseries data stored in InfluxDB.

Note

If ntopng cannot apply retention changes due to insufficient InfluxDB permissions, adjust the InfluxDB user privileges accordingly.

Create a Grafana data source to access time series data

The ntopng time-series historical data stored in the InfluxDB can also be used by ITOA module to display the real-time network traffic and flow collection performance metrics.

Before that, you need to configure a new data source in Grafana to access that historical data. To configure it, follow the following steps.

  1. Open ITOA Dashboard in NetEye and then select Data Sources option from the configuration menu.

  2. Click on the Add data source button and then select InfluxDB from the Time series database list.

  3. Now, configure these settings:

    • Name: <datasource-name> i.e ntop-influx

    • URL: https://<influxdb-domain>:8086

    • Database: <database-name> i.e. ntopng

    • User: admin

Authentication

Since InfluxDB is configured with authentication, enable Basic auth in the Grafana datasource configuration and set:

  • Basic Auth User: <influxdb-username>

  • Basic Auth Password: <influxdb-password>

Note

The InfluxDB URL and Database name should be exactly the same as you used in ntopng (ntopng >> Settings >> Preferences >> Timeseries)

Troubleshooting

If the <database-name> folder does not exists in the specified location /neteye/shared/influxdb/data/data/ or if POST /write messages are not available, then from the ntopng timeseries preferences, switch the timeseries driver to RRD, then back to InfluxDB and restart the ntopng service.

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