grafana-nodered-demo

Grafana snap for IoT Device nodered demo

Description

Grafana snap which come with the MQTT plugin and all the required configurations to run the IoT Device nodered demo. The snap is supposed to be installed on a local pc. Once installed, point your browser to http://localhost:3000 to access the grafana dashboard.

The Grafana snap includes a Data source configured to connect to hivemq public MQTT broker. To change the broker, login to grafana with admin/admin and go to "Data Sources/MQTT".

The grafana.ini file is located in $SNAP_DATA/conf/grafana.ini. Edit with root permissions to change the configuration (e.g. to change the grafana http port, search for "http_port" and change the port accordingly.

The snap provides a content interface slot called "writable". The "writable" slot allows r/w on $SNAP_DATA/conf. Tipical usage is to add/modify a custom grafana.ini file.

To connect to the interface, your snap should declare a "writable" slot as described below:

plugs:
   writable:
     interface: content
     content: writable-data
     target: <your target dir>

More info on content interface here: https://snapcraft.io/docs/content-interface

How to use it

Use the following command to connect the interface:

snap connect <your-snap-name>:writable grafana-nodered-demo:writable

Grafana plugins

To include Grafana plugin, add the following to snapcraft.yaml

<plugin_id>:
    plugin: dump
    source: <link to zip file of the plugin
    source-type: zip

Then configure the install hook to copy the plugin in the grafana plugin directory:

cp -r ${SNAP}/<plugin id> ${SNAP_COMMON}/data/plugins