Find the lead of kafka cluster using kafkacat

Question

I have kafka cluster in docker containers created using this tutorial. When I run kafkacat -L -b kafka-1:19092 i get:

Metadata for all topics (from broker 1: kafka-1:19092/1):
 3 brokers:
  broker 2 at kafka-2:29092
  broker 3 at kafka-3:39092
  broker 1 at kafka-1:19092
 1 topics:
  topic "__confluent.support.metrics" with 1 partitions:
    partition 0, leader 2, replicas: 2,3, isrs: 2,3

How can I find the lead broker? I would like to kill it and see behavior of cluster after electing new lead.

possible duplicate: https://stackoverflow.com/questions/48287339/how-to-know-the-broker-that-is-the-active-controller — H.Ç.T, Jan 17 '20 at 14:48

score 1 · Accepted Answer · answered Jan 17 '20 at 13:51

1

Clusters have a single controller.

Topics have leaders

topic "__confluent.support.metrics" with 1 partitions:
    partition 0, leader 2, replicas: 2,3, isrs: 2,3

answered Jan 17 '20 at 13:51

OneCricketeer

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Also, that tutorial doesn't understand Kafka networking because editing /etc/hosts is the wrong advice – OneCricketeer Jan 17 '20 at 13:55
what is the better solution? – Rudziankoŭ Jan 17 '20 at 13:56
And how to find which node is the controller-node? – Rudziankoŭ Jan 17 '20 at 13:57
RE: controller - see comments above. "better solution" for the hosts file is to understand the `advertised.listeners` variable in the `server.properties` file (or `KAFKA_ADVERTISED_LISTENERS` in the Docker variables) – OneCricketeer Jan 17 '20 at 15:40

Find the lead of kafka cluster using kafkacat

1 Answers1