- 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.
Table of Contents
Start the Destination Cluster
Note: After connecting via ssh, please give the lab extra time to finish provisioning. If you get a
dpkg frontend lockmessage when running
sudo apt install -y default-jdk, please give the lab more time before retrying the command.
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
Create a Topic in the Source Cluster
Create a topic named
test-topicwith 1 partition and a replication factor of 1.
bin/kafka-topics --create --topic test-topic --replication-factor 1 --partitions 1 --zookeeper localhost:2171
Run the Replicator Tool
Run Kafka Connect in Standalone Mode and pass in the
bin/connect-standalone etc/kafka/connect-standalone.properties etc/kafka-connect-replicator/quickstart-replicator.properties
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-topicin 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
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.