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* Initial commit * Apply another config: clustername * Rename variable * Fix bug * Add retry logic * Edit retry logic * Upgrade kafka-clients version to the most recent release * Make callback single object * Write documentation * Rewrite error message and emit logic * Handling AlertEvent * Override toString() * make clusterName more optional * bump up druid version * add producer.config option which make user can apply another optional config value of kafka producer * remove potential blocking in emit() * using MemoryBoundLinkedBlockingQueue * Fixing coding convention * Remove logging every exception and just increment counting * refactoring * trivial modification * logging when callback has exception * Replace kafka-clients 0.10.1.1 with 0.10.2.0 * Resolve the problem related of classloader * adopt try statement * code reformatting * make variables final * rewrite toString
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Kafka Emitter
To use this extension, make sure to include kafka-emitter extension.
Introduction
This extension emits Druid metrics to a Kafka directly with JSON format.
Currently, Kafka has not only their nice ecosystem but also consumer API readily available.
So, If you currently use Kafka, It's easy to integrate various tool or UI
to monitor the status of your Druid cluster with this extension.
Configuration
All the configuration parameters for the Kafka emitter are under druid.emitter.kafka.
| property | description | required? | default |
|---|---|---|---|
druid.emitter.kafka.bootstrap.servers |
Comma-separated Kafka broker. ([hostname:port],[hostname:port]...) |
yes | none |
druid.emitter.kafka.metric.topic |
Kafka topic name for emitter's target to emit service metric. | yes | none |
druid.emitter.kafka.alert.topic |
Kafka topic name for emitter's target to emit alert. | yes | none |
druid.emitter.kafka.producer.config |
JSON formatted configuration which user want to set additional properties to Kafka producer. | no | none |
druid.emitter.kafka.clusterName |
Optional value to specify name of your druid cluster. It can help make groups in your monitoring environment. | no | none |
Example
druid.emitter.kafka.bootstrap.servers=hostname1:9092,hostname2:9092
druid.emitter.kafka.metric.topic=druid-metric
druid.emitter.kafka.alert.topic=druid-alert
druid.emitter.kafka.producer.config={"max.block.ms":10000}