Get started with OpenShift Streams for Apache Kafka

Learning path | 11 resources | 2 hrs and 30 mins | Published on March 29, 2022
Red Hat OpenShift Streams for Apache Kafka is a managed cloud service for architects and developers working on event-driven applications. It provides hosted and managed, high-availability Kafka clusters on-demand, so you can focus on developing your applications while Red Hat takes care of the infrastructure.  In this learning path you’ll sign up for a free Red Hat account, provision a managed Kafka instance, and connect to it using service account credentials via SSL.

  1. Overview: Get started with OpenShift Streams for Apache Kafka
  2. Provision a Kafka instance Page | 15 mins
  3. Create a service account Page | 15 mins
  4. Connect to the Kafka instance Page | 15 mins
  5. Topics and partitions recap Page | 15 mins
  6. Creating a topic Page | 15 mins
  7. Viewing topic information Page | 15 mins
  8. Producers and consumers recap Page | 15 mins
  9. Configuring account access permissions Page | 15 mins
  10. Producing and consuming messages Page | 15 mins
  11. Changing topic retention Page | 15 mins

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Viewing topic information

Kafka
RHOSAK path 2 - resource 6

You can also use the following kcat command to view broker and topic information. Remember to replace the bootstrap server and credentials as described in previous examples.

$ kcat -b $BOOTSTRAP_SERVER \
-X security.protocol=SASL_SSL \
-X sasl.mechanisms=PLAIN \
-X sasl.username="$CLIENT_ID" \
-X sasl.password="$CLIENT_SECRET" -L

The output will resemble the following:

Metadata for all topics (from broker -1: sasl_ssl://game-kafka-c--ungpmsi-k-ft-vnpg.bf2.kafka.rhcloud.com:443/bootstrap):
 1 brokers:
  broker 0 at broker-0-game-kafka-c--ungpmsi-k-ft-vnpg.bf2.kafka.rhcloud.com:443 (controller)
 1 topic:
  topic "songs" with 1 partitions:
    partition 0, leader 0, replicas: 0, isrs: 0

This output explains that the single partition of the Songs topic is replicated across all three brokers, and that broker 1 is the leader of the partition. The replicas are populated by following the leader state.

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Creating a topic
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Producers and consumers recap