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Chapter 33. Kafka Sink

Send data to Kafka topics.

The Kamelet is able to understand the following headers to be set:

key / ce-key: as message key
partition-key / ce-partitionkey: as message partition key

Both the headers are optional.

33.1. Configuration Options

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

Property	Name	Description	Type	Default
bootstrapServers *	Brokers	Comma separated list of Kafka Broker URLs	string
password *	Password	Password to authenticate to kafka	string
topic *	Topic Names	Comma separated list of Kafka topic names	string
user *	Username	Username to authenticate to Kafka	string
saslMechanism	SASL Mechanism	The Simple Authentication and Security Layer (SASL) Mechanism used.	string	`"PLAIN"`
securityProtocol	Security Protocol	Protocol used to communicate with brokers. SASL_PLAINTEXT, PLAINTEXT, SASL_SSL and SSL are supported	string	`"SASL_SSL"`

Note

Fields marked with an asterisk (*) are mandatory.

33.2. Dependencies

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

camel:kafka
camel:kamelet

33.3. Usage

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

33.3.1. Knative Sink

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

kafka-sink-binding.yaml

apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: kafka-sink-binding
spec:
  source:
    ref:
      kind: Channel
      apiVersion: messaging.knative.dev/v1
      name: mychannel
  sink:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: kafka-sink
    properties:
      bootstrapServers: "The Brokers"
      password: "The Password"
      topic: "The Topic Names"
      user: "The Username"

33.3.1.1. Prerequisite

Make sure you have "Red Hat Integration - Camel K" installed into the OpenShift cluster you’re connected to.

33.3.1.2. Procedure for using the cluster CLI

Save the kafka-sink-binding.yaml file to your local drive, and then edit it as needed for your configuration.
Run the sink by using the following command:
```
oc apply -f kafka-sink-binding.yaml
```

33.3.1.3. Procedure for using the Kamel CLI

Configure and run the sink by using the following command:

kamel bind channel:mychannel kafka-sink -p "sink.bootstrapServers=The Brokers" -p "sink.password=The Password" -p "sink.topic=The Topic Names" -p "sink.user=The Username"

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

33.3.2. Kafka Sink

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

kafka-sink-binding.yaml

apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: kafka-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: kafka-sink
    properties:
      bootstrapServers: "The Brokers"
      password: "The Password"
      topic: "The Topic Names"
      user: "The Username"

33.3.2.1. Prerequisites

Ensure that you’ve installed the AMQ Streams operator in your OpenShift cluster and created a topic named my-topic in the current namespace. Make also sure you have "Red Hat Integration - Camel K" installed into the OpenShift cluster you’re connected to.

33.3.2.2. Procedure for using the cluster CLI

Save the kafka-sink-binding.yaml file to your local drive, and then edit it as needed for your configuration.
Run the sink by using the following command:
```
oc apply -f kafka-sink-binding.yaml
```

33.3.2.3. Procedure for using the Kamel CLI