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Kafka Resources

Kafka Resources​

Topic​

Creates a Topic in Kafka.

API Keys: Admin API Key Application API Key
Managed with: CLI API Console UI

---
apiVersion: kafka/v2
kind: Topic
metadata:
  cluster: shadow-it
  name: click.event-stream.avro
  labels:
    conduktor.io/description: | 
      # Event Stream from Click Application
      This is a multiline markdown description that will appear in the Topic Catalog
    conduktor.io/description.editable: "false"
spec:
  replicationFactor: 3
  partitions: 3
  configs:
    min.insync.replicas: '2'
    cleanup.policy: delete
    retention.ms: '60000'

Topic checks:

  • metadata.cluster is a valid Kafka Cluster
  • metadata.name must belong to the Application Instances
  • spec.replicationFactor and spec.partitions are immutable and cannot be modified once the topic is created
  • spec.configs must be valid Kafka Topic configs
  • All properties are validated against TopicPolicies attached to the Application Instance

Conduktor annotations

  • conduktor.io/description is optional. The description field in markdown that will be displayed in the Topic Catalog view
  • conduktor.io/description.editable is optional (defaults "true"). Defines whether the description can be updated in the UI

Side effect in Console & Kafka:

Subject​

Creates a Subject in the Schema Registry.

API Keys: Admin API Key Application API Key
Managed with: CLI API Console UI

Local file

---
apiVersion: kafka/v2
kind: Subject
metadata:
  cluster: shadow-it
  name: myPrefix.topic-value
spec:
  schemaFile: schemas/topic.avsc # relative to conduktor CLI execution context
  format: AVRO
  compatibility: FORWARD_TRANSITIVE

Inline

---
apiVersion: kafka/v2
kind: Subject
metadata:
  cluster: shadow-it
  name: myPrefix.topic-value
spec:
  schema: |
    {
      "type": "long"
    }
  format: AVRO

Schema Reference

---
apiVersion: kafka/v2
kind: Subject
metadata:
  cluster: shadow-it
  name: myPrefix.topic-value
spec:
  schema: |
    {
      "type": "record",
      "namespace": "com.schema.avro",
      "name": "Client",
      "fields": [
        {
          "name": "name",
          "type": "string"
        },
        {
          "name": "address",
          "type": "com.schema.avro.Address"
        }
      ]
    }
  format: AVRO
  references:
    - name: com.schema.avro.Address
      subject: commons.address-value
      version: 1

Subject checks:

  • metadata.cluster is a valid Kafka Cluster
  • metadata.name must belong to the Application Instance
  • One of spec.schema or spec.schemaFile must be present
    • schema requires an inline schema
    • schemaFile requires a path to a file that contains the schema relative to the CLI execution path
  • spec.format is mandatory. Defines the schema format: AVRO, PROTOBUF, JSON
  • spec.compatibility is optional. Defines the subject compatibility mode: BACKWARD, BACKWARD_TRANSITIVE, FORWARD, FORWARD_TRANSITIVE, FULL, FULL_TRANSITIVE, NONE
    • Unset the field if you want the compatibility mode to be the one defined at the Schema Registry global level
  • spec.references is optional. It specifies the names of referenced schemas

Side effect in Console & Kafka:

Connector​

Creates a connector on a Kafka Connect cluster.

API Keys: Admin API Key Application API Key
Managed with: CLI API Console UI

---
apiVersion: kafka/v2
kind: Connector
metadata:
  name: click.my-connector
  cluster: 'prod-cluster'
  connectCluster: kafka-connect-cluster
  labels:
    conduktor.io/auto-restart-enabled: true
    conduktor.io/auto-restart-frequency: 600
spec:
  config:
    connector.class: io.connect.jdbc.JdbcSourceConnector
    tasks.max: '1'
    topic: click.pageviews
    connection.url: "jdbc:mysql://127.0.0.1:3306/sample?verifyServerCertificate=false&useSSL=true&requireSSL=true"
    consumer.override.sasl.jaas.config: o.a.k.s.s.ScramLoginModule required username="<user>" password="<password>";

Connector checks

  • metadata.connectCluster is a valid KafkaConnect Cluster
  • metadata.name must belong to the Application Instance

Conduktor annotations

  • conduktor.io/auto-restart-enabled is optional (default "false"). Defines whether the Console Automatic Restart feature is enabled for this Connector
  • conduktor.io/auto-restart-frequency is optional (default 600, meaning 10 minutes). Defines the delay between consecutive restart attempts