Synology NAS monitoring

Configuration files and tutorial on how to monitor your Synology NAS using SNMP, Telegraf, InfluxDB and Grafana.

Motivation

There are already few SNMP/Grafana monitoring solutions available. However, they are usually:

• outdated
• simply wrong (e.g. monitoring Docker's CPU & disk I/O instead of Synology NAS)
• full of hard coded values
• based on older InfluxDB 1 & InfluxQL

This Synology NAS monitoring uses InfluxDB 2 with Flux query language and the dashboard is configurable with virtually zero hard coded values.

Configuration

Enable SNMP service on Synology NAS. In DSM:

• Control Panel -> Terminal & SMNP -> SNMP tab
• Check Enable SNMP service
• Check SNMPv1, SNMPv2c service
• Community: public
• Click [Apply]

Warning: this setting is not secure, especially if your NAS is exposed to the Internet. For more security, choose different Community (e.g. random string) or enable and configure SNMPv3 service. Note that if you change Community or enable SNMPv3 service, you have to make appropriate changes to the Telegraf configuration. Please, consult the documentation.

• Install Docker
• Download telegraf, influxdb and grafana/grafana images from the Docker registry
  • Download latest tag for all images
• Copy telegraf and influxdb folders from this repository into the docker shared folder on the NAS

Create influxdb container

In Advanced Settings:

• Advanced Settings
  • Check Enable auto-restart
• Volume
  • Folder docker/influxdb/var/lib/influxdb2 -> /var/lib/influxdb2 (as read-write)
• Network
  • Check Use the same network as Docker Host
• Envorinment
  • DOCKER_INFLUXDB_INIT_MODE -> setup
  • DOCKER_INFLUXDB_INIT_USERNAME -> my-user
  • DOCKER_INFLUXDB_INIT_PASSWORD -> my-password
  • DOCKER_INFLUXDB_INIT_ORG -> NAS
  • DOCKER_INFLUXDB_INIT_BUCKET -> telegraf

InfluxDB should be now available at http://your-nas:8086/.

Create telegraf container

In Advanced Settings:

• Advanced Settings
  • Check Enable auto-restart
• Volume
  • File docker/telegraf/etc/telegraf/telegraf.conf -> /etc/telegraf/telegraf.conf (as read-only)
  • Folder docker/telegraf/mibs -> /mibs (as read-only)
• Network
  • Check Use the same network as Docker Host

Before running the container:

• Edit docker/telegraf/etc/telegraf/telegraf.conf appropriately
  • In [[outputs.influxdb_v2]], you must change urls & token (eventually organisation & bucket if you wish to change them)
    • InfluxDB token can be found on http://your-nas:8086/, in the Data menu (on the left), on the API Tokens tab, after clicking on my-user's Token
  • In each instance of [[inputs.snmp]], you must change agents (you can choose IP or hostname)
    • You can specify multiple agents if you wish to monitor multiple NAS devices

Create grafana container

In Advanced Settings:

• Advanced Settings
  • Check Enable auto-restart
• Network
  • Check Use the same network as Docker Host

Grafana should be now available at http://your-nas:3000/. Default credentials are admin:admin. After login, it will ask you for a new password.

After logging into Grafana web interface:

• Go to Configuration -> Data sources
  • Add data source -> InfluxDB
  • Query Language -> Flux
  • HTTP
    • URL -> http://your-nas:8086
  • Auth
    • Disable Basic auth
    • (Everything should be disabled in this group)
  • InfluxDB Details
    • Organization -> NAS (or whatever specified previously in DOCKER_INFLUXDB_INIT_ORG)
    • Token -> Your InfluxDB token (as described above)
    • Default Bucket -> telegraf
  • Click [Save & test]
• Go to Create [+] -> Import (http://your-nas:3000/dashboard/import)
  • Click [Upload JSON file]
  • Select grafana/dashboard.json
  • Click [Import]

If not selected by default, choose appropriate Data source at the top.

License

Content of this repository - except the telegraf/mibs folder - is open-source under the MIT license. See the LICENSE.txt file in this repository.

telegraf/mibs folder contains following files:

• Every file from the Synology_MIB_File.zip
• HOST-RESOURCES-MIB.txt, IF-MIB.txt, SNMPv2-MIB.txt, SNMPv2-SMI.txt and UCD-SNMP-MIB.txt from the net-snmp github repository

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