Produce

type: "io.kestra.plugin.kafka.Produce"

Send a message to a Kafka topic

Examples

Read a CSV file, transform it and send it to Kafka

id: send_message_to_kafka
namespace: dev
inputs:
  - type: FILE
    name: file
    description: a CSV file with columns id, username, tweet, and timestamp

tasks:
  - id: csv_to_ion
    type: io.kestra.plugin.serdes.csv.CsvReader
    from: "{{ inputs.file }}"
  - id: ion_to_avro_schema
    type: io.kestra.plugin.scripts.nashorn.FileTransform
    from: "{{ outputs.csvReader.uri }}"
    script: |
      var result = {
        "key": row.id,
        "value": {
          "username": row.username,
          "tweet": row.tweet
        },
        "timestamp": row.timestamp,
        "headers": {
          "key": "value"
        }
      };
      row = result
  - id: avro_to_kafka
    type: io.kestra.plugin.kafka.Produce
    from: "{{ outputs.fileTransform.uri }}"
    keySerializer: STRING
    properties:
      bootstrap.servers: local:9092
    serdeProperties:
      schema.registry.url: http://local:8085
    topic: test_kestra
    valueAvroSchema: |
      {"type":"record","name":"twitter_schema","namespace":"io.kestra.examples","fields":[{"name":"username","type":"string"},{"name":"tweet","type":"string"}]}
    valueSerializer: AVRO

Properties

from

• Type:stringarrayobject
• Dynamic: ✔️
• Required: ✔️

The content of the message to be sent to Kafka

Can be an internal storage uri, a map (i.e. a list of key-value pairs) or a list of maps. The following keys are supported: key, value, partition, timestamp, and headers.

keySerializer

• Type: object
• Dynamic: ❓
• Required: ✔️

properties

• Type: object
• SubType: string
• Dynamic: ✔️
• Required: ✔️

Connection properties

The bootstrap.servers property is a minimal required configuration to connect to a Kafka topic. This property can reference any valid Consumer Configs or Producer Configs as key-value pairs.

If you want to pass a truststore or a keystore, you must provide a base64 encoded string for ssl.keystore.location and ssl.truststore.location.

valueSerializer

• Type: object
• Dynamic: ❓
• Required: ✔️

keyAvroSchema

• Type: string
• Dynamic: ✔️
• Required: ❌

Avro Schema if the key is set to AVRO type

serdeProperties

• Type: object
• SubType: string
• Dynamic: ✔️
• Required: ❌

Serializer configuration

Configuration that will be passed to serializer or deserializer. The avro.use.logical.type.converters is always passed when you have any values set to true.

topic

• Type: string
• Dynamic: ✔️
• Required: ❌

Kafka topic to which the message should be sent

Could also be passed inside the from property using the key topic

valueAvroSchema

• Type: string
• Dynamic: ✔️
• Required: ❌

Avro Schema if the value is set to AVRO type

Outputs

messagesCount

• Type: integer

Number of messages sent to a Kafka topic