Lab
A Cloud Guru

Replicating Data Between Two Kafka Clusters

Kafka can be deployed in mutliple data centers in an "Active-Active", "Active-Passive", or centralized architecture. In this hands-on lab, we simulate an active-passive architecture in which data from one cluster is replicated to another cluster using a tool called Replicator. Replicator, like MirrorMaker, allows you to preserve topic configuration in the source cluster while replicating the messages from one cluster to another.

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Path Info

Level

Intermediate

Duration

1h 45m

Published

Jul 17, 2019

Challenge

Start the Destination Cluster
Note: After connecting via ssh, please give the lab extra time to finish provisioning. If you get a dpkg frontend lock message when running sudo apt install -y default-jdk, please give the lab more time before retrying the command.

Start Zookeeper.
```
bin/zookeeper-server-start etc/kafka/zookeeper.properties
```
Start Kafka.
```
bin/kafka-server-start etc/kafka/server.properties
```

Challenge

Start the Origin Cluster

Make a copy of the configuration files.

cp etc/kafka/zookeeper.properties /tmp/zookeeper_origin.properties
cp etc/kafka/server.properties /tmp/server_origin.properties

Change the port numbers for the origin cluster.

sed -i -e "s/2181/2171/g" /tmp/zookeeper_origin.properties
sed -i -e "s/9092/9082/g" /tmp/server_origin.properties
sed -i -e "s/2181/2171/g" /tmp/server_origin.properties
sed -i -e "s/#listen/listen/g" /tmp/server_origin.properties

Change the data directory for the origin cluster.

sed -i -e "s/zookeeper/zookeeper_origin/g" /tmp/zookeeper_origin.properties
sed -i -e "s/kafka-logs/kafka-logs-origin/g" /tmp/server_origin.properties

Start Zookeeper.

bin/zookeeper-server-start /tmp/zookeeper_origin.properties

Start Kafka.

bin/kafka-server-start /tmp/server_origin.properties

Challenge

Create a Topic in the Source Cluster
Create a topic named test-topic with 1 partition and a replication factor of 1.
```
bin/kafka-topics --create --topic test-topic --replication-factor 1 --partitions 1 --zookeeper localhost:2171
```

Challenge

Run the Replicator Tool

Run Kafka Connect in Standalone Mode and pass in the quickstart-replicator.properties file

bin/connect-standalone etc/kafka/connect-standalone.properties etc/kafka-connect-replicator/quickstart-replicator.properties

Challenge

Produce and Verify Replication

Verify that the topic was replicated to the destination cluster.

bin/kafka-topics --describe --topic test-topic.replica --zookeeper localhost:2181

Open a Console Producer and write to the topic test-topic in the source cluster.

seq 10000 | bin/kafka-console-producer --topic test-topic --broker-list localhost:9082

Confirm the messages were replicated by opening a console consumer to the destination cluster.

bin/kafka-console-consumer --from-beginning --topic test-topic.replica --bootstrap-server localhost:9092

Author

A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

What's a lab?

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.