mirror of https://github.com/apache/druid.git
36 lines
1.5 KiB
Markdown
36 lines
1.5 KiB
Markdown
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---
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layout: doc_page
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---
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# Kafka Emitter
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To use this extension, make sure to [include](../../operations/including-extensions.html) `kafka-emitter` extension.
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## Introduction
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This extension emits Druid metrics to a [Kafka](https://kafka.apache.org) directly with JSON format.<br>
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Currently, Kafka has not only their nice ecosystem but also consumer API readily available.
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So, If you currently use Kafka, It's easy to integrate various tool or UI
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to monitor the status of your Druid cluster with this extension.
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## Configuration
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All the configuration parameters for the Kafka emitter are under `druid.emitter.kafka`.
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|property|description|required?|default|
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|--------|-----------|---------|-------|
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|`druid.emitter.kafka.bootstrap.servers`|Comma-separated Kafka broker. (`[hostname:port],[hostname:port]...`)|yes|none|
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|`druid.emitter.kafka.metric.topic`|Kafka topic name for emitter's target to emit service metric.|yes|none|
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|`druid.emitter.kafka.alert.topic`|Kafka topic name for emitter's target to emit alert.|yes|none|
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|`druid.emitter.kafka.producer.config`|JSON formatted configuration which user want to set additional properties to Kafka producer.|no|none|
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|`druid.emitter.kafka.clusterName`|Optional value to specify name of your druid cluster. It can help make groups in your monitoring environment. |no|none|
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### Example
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```
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druid.emitter.kafka.bootstrap.servers=hostname1:9092,hostname2:9092
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druid.emitter.kafka.metric.topic=druid-metric
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druid.emitter.kafka.alert.topic=druid-alert
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druid.emitter.kafka.producer.config={"max.block.ms":10000}
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```
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