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Apache Kafka for OpenShift

Run Apache Kafka and Apache ZooKeeper on OpenShift v3.

This was developed for demonstration purposes. Use in environments where you do not need persistence in the face of failures or configuration tuning for scale.

The architecture is as follows:

  • 1 pod containing a container for Apache Kafka and Apache ZooKeeper
  • 1 service to access the containers

Quick start

Load resources (Templates, DeploymentConfigs, Services)

oc create -f https://raw.githubusercontent.com/z1odeypnd/apache-kafka/master/resources.yaml

Deploy the Apache Kafka + Apache Zookeeper pod

oc new-app apache-kafka

Optional: Follow container logs

choose one of: [apache-kafka apache-zookeeper]

$ oc get pods
NAME                   READY     STATUS    RESTARTS   AGE
apache-kafka-1-ln40b   2/2       Running   0          1s

$ oc logs --follow apache-kafka-1-ln40b -c apache-kafka
[2017-08-10 12:25:17,652] INFO KafkaConfig values: 
	advertised.host.name = apache-kafka

$ oc logs --follow apache-kafka-1-ln40b -c apache-zookeeper
[2017-08-10 12:25:19,697] INFO Reading configuration from: config/zookeeper.properties (org.apache.zookeeper.server.quorum.QuorumPeerConfig)

...for specific diagnostic purpose log grepping could be useful :

$ oc logs --follow apache-kafka-1-ln40b -c apache-zookeeper | grep "socket connection"
[2017-08-10 12:28:25,291] INFO Accepted socket connection from /172.17.0.7:57822 (org.apache.zookeeper.server.NIOServerCnxnFactory)
[2017-08-10 12:28:25,324] INFO Closed socket connection for client /172.17.0.7:57822 which had sessionid 0x15dcc1b2ea40001 (org.apache.zookeeper.server.NIOServerCnxn)
[2017-08-10 12:28:38,960] INFO Accepted socket connection from /172.17.0.7:57838 (org.apache.zookeeper.server.NIOServerCnxnFactory)
[2017-08-10 12:28:38,996] INFO Closed socket connection for client /172.17.0.7:57838 which had sessionid 0x15dcc1b2ea40002 (org.apache.zookeeper.server.NIOServerCnxn)
[2017-08-10 12:30:33,112] INFO Accepted socket connection from /172.17.0.7:57996 (org.apache.zookeeper.server.NIOServerCnxnFactory)
[2017-08-10 12:30:33,332] INFO Closed socket connection for client /172.17.0.7:57996 which had sessionid 0x15dcc1b2ea40003 (org.apache.zookeeper.server.NIOServerCnxn)
  1. Deploy a debugging container and connect to it
oc run -it --rm kafka-debug --image=shokhin/apache-kafka --command -- bash
  1. Create a topic
bin/kafka-topics.sh --create --zookeeper apache-kafka --replication-factor 1 --partitions 1 --topic test
  1. List topics
bin/kafka-topics.sh --list --zookeeper apache-kafka
  1. Send some messages
bin/kafka-console-producer.sh --broker-list apache-kafka:9092 --topic test <<EOF
foo
bar
baz
EOF
  1. Receive some messages
bin/kafka-console-consumer.sh --bootstrap-server apache-kafka:9092 --topic test --from-beginning

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Run Apache Kafka and Apache ZooKeeper on OpenShift v3.

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