Kafka on Kubernetes multi-node

Question

So my objective here is to set up a cluster of several kafka-brokers in a distributed fashion. But I can\'t see the way to make the brokers aware of each other.

As f

Answer 1

I did this using docker-compose (The difference for Kubernetes would be that you would pass the ID via your service.yaml and have 2 services):

kafka1:
  build: kafka-0.8.1/
  ports:
  - 9092
  links:
  - zookeeper
  environment:
  - ID=1
kafka2:
  build: kafka-0.8.1/
  ports:
  - 9092
  links:
  - zookeeper
  environment:
  - ID=2

Config:

broker.id=${ID}
port=9092
advertised.host.name=${HOST}
advertised.port=9092
num.network.threads=3
num.io.threads=8
socket.send.buffer.bytes=102400
socket.receive.buffer.bytes=102400
socket.request.max.bytes=104857600
log.dirs=/kafka/kafka-logs-${ID}
num.partitions=200
num.recovery.threads.per.data.dir=1
log.retention.hours=168
log.segment.bytes=1073741824
log.retention.check.interval.ms=300000
log.cleaner.enable=false
zookeeper.connect=${DOCKER_ZOOKEEPER_1_PORT_2181_TCP_ADDR}:${DOCKER_ZOOKEEPER_1_PORT_2181_TCP_PORT}
zookeeper.connection.timeout.ms=6000

sh:

#!/bin/bash
echo "Running config"
export HOST=`grep $HOSTNAME /etc/hosts | awk '{print $1}'`
export ID=${ID:?}
perl -p -i -e 's/\$\{([^}]+)\}/defined $ENV{$1} ? $ENV{$1} : $&/eg' < /broker.template > $KAFKA_HOME/config/server.properties
echo "Done"
echo "starting kafka with:"
echo "$KAFKA_HOME/config/server.properties"
echo ""
cat $KAFKA_HOME/config/server.properties
$KAFKA_HOME/bin/kafka-server-start.sh $KAFKA_HOME/config/server.properties