Not able to get Telegraf to write mqtt messages to influxDB

Telegraf
, , ,
1

Hello there,
i really need some support to get telegraf communication from mqtt to influxDB up and running.
Here is my setup:
im sending json format to my mqtt broker. There are several topic like DHT22/livingroom, DHT22/bedroom and so on. The json-string looks like this:

{"temperature":21.20000076,"humidity":62.59999847}

Im trying to fetch those messages with telegraf and write them to influxDB.
Here is my telegraf.conf:

[global_tags]

[agent]
  interval = "60s"
  round_interval = true
  metric_batch_size = 1000
  metric_buffer_limit = 10000
  collection_jitter = "0s"
  flush_interval = "10s"
  flush_jitter = "0s"
  precision = ""
  hostname = "192.xxx.0.xxx"
  omit_hostname = false
  ## Log at debug level.
  debug = true
  ## Log only error level messages.
  quiet = false

[[outputs.influxdb]]
  urls = ["http://influxdb:8086"]
  database = "influx"
  timeout = "5s"
  username = "telegraf"
  password = "***"

# Read metrics from MQTT topic(s)
[[inputs.mqtt_consumer]]
  servers = ["tcp://192.168.178.67:1883"]
  ## Topics that will be subscribed to.
  topics = [
    "DHT22/#",
  ]
  data_format ="json_v2"
  [[inputs.mqtt_consumer.topic_parsing]]
    topic = "DHT22/+"
    measurement = "measurement/_"
    tags = "_/room"
  [[inputs.mqtt_consumer.json_v2]]
    [[inputs.mqtt_consumer.json_v2.tag]]
    path = "humidity"
    type = "float"
    [[inputs.mqtt_consumer.json_v2.field]]
    path = "temperature"
    type = "float"

Telegraf seems to connect to influxDB and the mqtt-broker without any issues. But im not seeing any messages arriving at telegraf. See logfile:

2023-10-28T10:02:43Z I! Loading config: /etc/telegraf/telegraf.conf
2023-10-28T10:02:43Z I! Starting Telegraf 1.28.3 brought to you by InfluxData the makers of InfluxDB
2023-10-28T10:02:43Z I! Available plugins: 240 inputs, 9 aggregators, 29 processors, 24 parsers, 59 outputs, 5 secret-stores
2023-10-28T10:02:43Z I! Loaded inputs: mqtt_consumer
2023-10-28T10:02:43Z I! Loaded aggregators: 
2023-10-28T10:02:43Z I! Loaded processors: 
2023-10-28T10:02:43Z I! Loaded secretstores: 
2023-10-28T10:02:43Z I! Loaded outputs: influxdb
2023-10-28T10:02:43Z I! Tags enabled: host=192.xxx.0.xxx
2023-10-28T10:02:43Z I! [agent] Config: Interval:1m0s, Quiet:false, Hostname:"192.xxx.0.xxx", Flush Interval:10s
2023-10-28T10:02:43Z D! [agent] Initializing plugins
2023-10-28T10:02:43Z D! [agent] Connecting outputs
2023-10-28T10:02:43Z D! [agent] Attempting connection to [outputs.influxdb]
2023-10-28T10:02:44Z D! [agent] Successfully connected to outputs.influxdb
2023-10-28T10:02:44Z D! [agent] Starting service inputs
2023-10-28T10:02:44Z I! [inputs.mqtt_consumer] Connected [tcp://192.168.178.67:1883]
2023-10-28T10:02:54Z D! [outputs.influxdb] Wrote batch of 1 metrics in 6.27725ms
2023-10-28T10:02:54Z D! [outputs.influxdb] Buffer fullness: 0 / 10000 metrics
2023-10-28T10:03:04Z D! [outputs.influxdb] Wrote batch of 1 metrics in 6.193942ms
2023-10-28T10:03:04Z D! [outputs.influxdb] Buffer fullness: 0 / 10000 metrics
2023-10-28T10:03:14Z D! [outputs.influxdb] Buffer fullness: 0 / 10000 metrics
2023-10-28T10:03:24Z D! [outputs.influxdb] Wrote batch of 1 metrics in 5.639901ms
2023-10-28T10:03:24Z D! [outputs.influxdb] Buffer fullness: 0 / 10000 metrics

I guess its some case of bad telgraf.conf but i wasnt able to figure it out, hopefully some of you could support me.

2

Looks like data is getting written from the mqtt_consumer as that is your only input.

I would enable the [[outputs.file]] output to see what metrics are actually generated.