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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 | 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 |
| |
| securityProtocol | Security Protocol | Protocol used to communicate with brokers. SASL_PLAINTEXT, PLAINTEXT, SASL_SSL and SSL are supported | string |
|
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.yamlfile 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.yamlfile 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
Configure and run the sink by using the following 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 command creates the KameletBinding in the current namespace on the cluster.
