Simple Open Messaging Interface (O-MI) datasource

Uses Open Messaging Interface (O-MI) and Open Data Format (O-DF) to fetch and show data in Grafana. With this plugin, you can select individual O-DF InfoItems as the query.

The plugin is tested against resent versions of "O-MI Node" server implementation, but should work with other implementations also. Uses O-MI and O-DF version 1 read request with "begin", "end" and "newest" parameters.

Installation

To install this plugin using the grafana-cli tool:

sudo grafana-cli plugins install aaltoasia-o-mi-datasource
sudo service grafana-server restart

Or copy the repository of this plugin to plugin directory of Grafana.

Usage

1. After installation, go to datasources and add Open Messaging Interface
2. When adding the Datasource; Select "Access" to "Browser", because server access is not implemented.
3. Add O-MI server url (without trailing slash).
4. Test and save.
5. Create a dashboard and a graph, then select the created datasource from the list
6. Write the path to one O-DF InfoItem in the query field (without the usual "/Objects/" beginning)

• Currently respects the datapoint number limit of grafana, which means long time ranges of high frequency InfoItems might only show shorter timespan in graphs.
• The query interface will be improved in future versions of this plugin