Unable to define colors in discrete mode using OpenTSDB datasource

[klei22]

What happened: When using discrete mode for creating color buckets, error appears with message "Data has value with undefined color"

What you expected to happen: Expected to be able to create colors for defined value buckets in discrete mode. Spectrum mode works seamlessly and has no issues.

How to reproduce it (as minimally and precisely as possible): I connected my OpenTSDB 2.4 datasource and was able to see spectrum colors in spectrum mode. When switching to discrete mode, error appears with message "Data has value with undefined color".

Environment:

• Grafana version: 7.4.5
• flant-statusmap-panel version: 0.4.2
• Data source type & version: OpenTSDB 2.4
• OS Grafana is installed on: Debian 11
• User OS & Browser: macOS 11 & Chrome v96.0
• Grafana plugins: Status map panel by flant
• Others:

Anything else we should know?:

[diafour]

"Discrete mode" will not quantize input values, it just maps a discrete value to a color. Think "color it green if the value is equal to 16", not "color it green if the value is between 16 and 17".

There are suggestions to improve "Discrete mode" to use it with continuous values (#75, #198). Also, I hope you can quantize values using the "Transformation" tab in the upcoming 0.5.0 release with data frames support.

[klei22]

@diafour Thank you for the explanation of the discrete mode functionality. I do very much look forward to be able to create ranges someday! Hoping to try out the data frames support as suggested from your upcoming release.