`topic_parsing` configuration specified but not used

I can’t figure out how to parse my MQTT topic into tags. My topic looks like this: tele/seattle/conf1/bme280/SENSOR.

My attempt to extract the fields into tags:

  [[inputs.mqtt_consumer.topic_parsing]]
  tags = "_/site/room/sensor/_"

The error when I test:

[telegraf] Error running agent: Error loading config file /etc/telegraf/telegraf.conf: plugin inputs.mqtt_consumer: line 31: configuration specified the fields ["topic_parsing"], but they weren't used

I suspect the topic_parsing configuration is not complete as shown. Examples see here:

telegraf/README.md at release-1.21 · influxdata/telegraf · GitHub

Hey. Which version are you using? Topic parsing is only available in 1.21+. Furthermore, you are missing the topic field in the topic_parsing section. This field is required to determine which topics should be parsed with the given values (kind of a filter).

Given your example you probably want

[[inputs.mqtt_consumer.topic_parsing]]
  topic = "tele/+/+/+/#"
  tags = "_/site/room/sensor/_"
2 Likes

Thanks @srebhan. I was confused about the topic value and that clears it up and I was on 1.19.x. Working now!