# Kafka

This reference documents the Kubernetes configuration options for the Kafka chart, which provides a message bus to store telemetry data for the Grafbase platform.

All configuration options are nested under the `kafka` key.

You can find the Kafka chart source code from the [ArtifactHub](https://artifacthub.io/packages/helm/bitnami/kafka?modal=values).

## zookeeper

Zookeeper configuration for the Kafka cluster.

**Defaults**:

```yaml
zookeeper:
  enabled: false
```

## broker

Broker configuration for the Kafka cluster.

**Defaults**:

```yaml
broker:
  autoscaling:
    enabled: false
```

## resources

Resource requests and limits for the Kafka container.

**Defaults**:

```yaml
resources:
  limits:
    cpu: 500m
    memory: 500Mi
  requests:
    cpu: 500m
    memory: 500Mi
```

## listeners

Listeners configuration for the Kafka cluster.

**Defaults**:

```yaml
listeners:
  client:
    protocol: PLAINTEXT
  interbroker:
    protocol: PLAINTEXT
```

## provisioning

Provisioning configuration for the Kafka cluster.

**Defaults**:

```yaml
provisioning:
  enabled: true
  topics:
    - name: otlp_metrics
    - name: otlp_spans
    - name: otlp_logs
```

## auth

Authentication configuration for the Kafka cluster.

**Defaults**:

```yaml
auth:
  clientProtocol: PLAIN
  interBrokerProtocol: PLAIN
  sasl:
    jaas:
      clientUsers:
        - grafbase
      clientPasswords:
        - grafbase
```