mqtt sink MQTT Sink

Provided by: "Apache Software Foundation"

Support Level for this Kamelet is: "Preview"

Allows sending messages to any endpoint that supports the MQTT protocol, such as a message broker.

Configuration Options

The following table summarizes the configuration options available for the mqtt-sink Kamelet:

Property Name Description Type Default Example

brokerUrl *

Broker URL

The URL of the broker where to establish the connection

string

"tcp://mosquitto:1883"

topic *

Topic

The topic to send messages to

string

"mytopic"

password

Password

Password to use when connecting to the MQTT broker

string

username

Username

Username to use when connecting to the MQTT broker

string

Fields marked with an asterisk (*) are mandatory.

Dependencies

At runtime, the mqtt-sink Kamelet relies upon the presence of the following dependencies:

  • camel:paho

  • camel:kamelet

Usage

This section describes how you can use the mqtt-sink.

Knative Sink

You can use the mqtt-sink Kamelet as a Knative sink by binding it to a Knative object.

mqtt-sink-binding.yaml
apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: mqtt-sink-binding
spec:
  source:
    ref:
      kind: Channel
      apiVersion: messaging.knative.dev/v1
      name: mychannel
  sink:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: mqtt-sink
    properties:
      brokerUrl: "tcp://mosquitto:1883"
      topic: "mytopic"

Prerequisite

You have Camel K installed on the cluster.

Procedure for using the cluster CLI

  1. Save the mqtt-sink-binding.yaml file to your local drive, and then edit it as needed for your configuration.

  2. Run the sink by using the following command:

    kubectl apply -f mqtt-sink-binding.yaml

Procedure for using the Kamel CLI

Configure and run the sink by using the following command:

kamel bind channel:mychannel mqtt-sink -p "sink.brokerUrl=tcp://mosquitto:1883" -p "sink.topic=mytopic"

This command creates the KameletBinding in the current namespace on the cluster.

Kafka Sink

You can use the mqtt-sink Kamelet as a Kafka sink by binding it to a Kafka topic.

mqtt-sink-binding.yaml
apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: mqtt-sink-binding
spec:
  source:
    ref:
      kind: KafkaTopic
      apiVersion: kafka.strimzi.io/v1beta1
      name: my-topic
  sink:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: mqtt-sink
    properties:
      brokerUrl: "tcp://mosquitto:1883"
      topic: "mytopic"

Prerequisites

  • You’ve installed Strimzi.

  • You’ve created a topic named my-topic in the current namespace.

  • You have Camel K installed on the cluster.

Procedure for using the cluster CLI

  1. Save the mqtt-sink-binding.yaml file to your local drive, and then edit it as needed for your configuration.

  2. Run the sink by using the following command:

    kubectl apply -f mqtt-sink-binding.yaml

Procedure for using the Kamel CLI

Configure and run the sink by using the following command:

kamel bind kafka.strimzi.io/v1beta1:KafkaTopic:my-topic mqtt-sink -p "sink.brokerUrl=tcp://mosquitto:1883" -p "sink.topic=mytopic"

This command creates the KameletBinding in the current namespace on the cluster.