MQTT Source

Provided by: "Apache Software Foundation"

Allows receiving messages from 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-source Kamelet:

Property Name Description Type Default Example

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 subscribe to	string		`"mytopic"`
clientId	Client ID	The client ID to use when connecting to the resource	string	`"mqtt-source"`

brokerUrl *

Broker URL

The URL of the broker where to establish the connection

string

"tcp://mosquitto:1883"

topic *

Topic

The topic to subscribe to

string

"mytopic"

clientId

Client ID

The client ID to use when connecting to the resource

string

"mqtt-source"

Fields marked with (*) are mandatory.

Usage

This section summarizes how the mqtt-source can be used in various contexts.

Knative Source

The mqtt-source Kamelet can be used as Knative source by binding it to a Knative object.

mqtt-source-binding.yaml

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

Make sure you have Camel K installed into the Kubernetes cluster you’re connected to.

Save the mqtt-source-binding.yaml file into your hard drive, then configure it according to your needs.

You can run the source using the following command:

kubectl apply -f mqtt-source-binding.yaml