kafka sink Kafka Sink

Provided by: "Apache Software Foundation"

Support Level for this Kamelet is: "Preview"

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.

Configuration Options

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

Property Name Description Type Default Example

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"
Fields marked with (*) are mandatory.

Usage

This section summarizes how the kafka-sink can be used in various contexts.

Knative Sink

The kafka-sink Kamelet can be used as 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"

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

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

You can run the sink using the following command:

kubectl apply -f kafka-sink-binding.yaml

Dependencies

The Kamelet needs the following dependencies:

  • camel:kafka

  • camel:kamelet

Binding to Knative using the Kamel CLI:

The procedure described above can be simplified into a single execution of the kamel bind 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 will create the KameletBinding under the hood and apply it to the current namespace in the cluster.

Kafka Sink

The kafka-sink Kamelet can be used as 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"

Ensure that you’ve installed Strimzi and created a topic named my-topic in the current namespace. Make also sure you have Camel K installed into the Kubernetes cluster you’re connected to.

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

You can run the sink using the following command:

kubectl apply -f kafka-sink-binding.yaml

Binding to Kafka using the Kamel CLI:

The procedure described above can be simplified into a single execution of the kamel bind command:

kamel bind kafka.strimzi.io/v1beta1:KafkaTopic:my-topic kafka-sink -p "sink.bootstrapServers=The Brokers" -p "sink.password=The Password" -p "sink.topic=The Topic Names" -p "sink.user=The Username"

This will create the KameletBinding under the hood and apply it to the current namespace in the cluster.

Kamelet source file

Have a look at the following link:

https://github.com/apache/camel-kamelets/blob/main/kafka-sink.kamelet.yaml

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