# MQTT Consumer Input Plugin The [MQTT][mqtt] consumer plugin reads from the specified MQTT topics and creates metrics using one of the supported [input data formats][]. ### Configuration ```toml [[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://127.0.0.1:1883"] ## Topics that will be subscribed to. topics = [ "telegraf/host01/cpu", "telegraf/+/mem", "sensors/#", ] ## The message topic will be stored in a tag specified by this value. If set ## to the empty string no topic tag will be created. # topic_tag = "topic" ## 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" ## Maximum messages to read from the broker that have not been written by an ## output. For best throughput set based on the number of metrics within ## each message and the size of the output's metric_batch_size. ## ## For example, if each message from the queue contains 10 metrics and the ## output metric_batch_size is 1000, setting this to 100 will ensure that a ## full batch is collected and the write is triggered immediately without ## waiting until the next flush_interval. # max_undelivered_messages = 1000 ## Persistent session disables clearing of the client session on connection. ## In order for this option to work you must also set client_id to identify ## the client. To receive messages that arrived while the client is offline, ## also set the qos option to 1 or 2 and don't forget to also set the QoS when ## publishing. # persistent_session = false ## If unset, 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" ``` ### Metrics - All measurements are tagged with the incoming topic, ie `topic=telegraf/host01/cpu` [mqtt]: https://mqtt.org [input data formats]: /docs/DATA_FORMATS_INPUT.md