telegraf/plugins/inputs/mqtt_consumer/README.md

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# MQTT Consumer Input Plugin
The [MQTT](http://mqtt.org/) consumer plugin reads from
specified MQTT topics and adds messages to InfluxDB.
The plugin expects messages in the
[Telegraf Input Data Formats](https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md).
### Configuration:
```toml
# Read metrics from MQTT topic(s)
[[inputs.mqtt_consumer]]
## MQTT broker URLs to be used. The format should be scheme://host:port,
## schema can be tcp, ssl, or ws.
servers = ["tcp://localhost:1883"]
## QoS policy for messages
## 0 = at most once
## 1 = at least once
## 2 = exactly once
##
## When using a QoS of 1 or 2, you should enable persistent_session to allow
## resuming unacknowledged messages.
qos = 0
## Connection timeout for initial connection in seconds
connection_timeout = "30s"
## Topics to subscribe to
topics = [
"telegraf/host01/cpu",
"telegraf/+/mem",
"sensors/#",
]
# if true, messages that can't be delivered while the subscriber is offline
# will be delivered when it comes back (such as on service restart).
# NOTE: if true, client_id MUST be set
persistent_session = false
# If empty, a random client ID will be generated.
client_id = ""
## username and password to connect MQTT server.
# username = "telegraf"
# password = "metricsmetricsmetricsmetrics"
## Optional TLS Config
# tls_ca = "/etc/telegraf/ca.pem"
# tls_cert = "/etc/telegraf/cert.pem"
# tls_key = "/etc/telegraf/key.pem"
## Use TLS but skip chain & host verification
# insecure_skip_verify = false
## Data format to consume.
## Each data format has its own unique set of configuration options, read
## more about them here:
## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
data_format = "influx"
```
### Tags:
- All measurements are tagged with the incoming topic, ie
`topic=telegraf/host01/cpu`