How to use Strimzi Kafka: Opening a Kubernetes shell on a broker pod and listing all topics
Strimzi Kafka offers an efficient solution for deploying and managing Apache Kafka on Kubernetes, making it easier to handle Kafka clusters within a Kubernetes environment. In this article, we'll guide you through opening a shell on a Kafka broker pod in Kubernetes and listing all the topics in your Kafka cluster using an SSL-based connection.
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Strimzi makes it easy to run an Apache Kafka cluster on Kubernetes in different ways. For development, you can quickly set up a cluster in Minikube in just a few minutes.
To open a shell on a Kafka broker pod in a Kubernetes cluster managed by Strimzi, first identify the broker pod by listing the pods in your Kafka namespace with kubectl get pods -n kafka. Once you locate a broker pod, use the kubectl exec command to access it. For example, run kubectl exec -it my-kafka-cluster-kafka-0 -n kafka -c kafka -- /bin/bash to open an interactive shell. This lets you interact directly with the Kafka broker, where you can configure settings, access logs, or troubleshoot.
To list all topics over an SSL connection, first ensure you have access to the necessary SSL certificates on the broker pod (such as client.truststore.p12 and client.keystore.p12). Then, create a configuration file (e.g., /tmp/blogexample.properties) with SSL settings, including the truststore and keystore paths and passwords. Once configured, use the command kafka-topics.sh --bootstrap-server localhost:9093 --list --command-config /tmp/blogexample.properties to retrieve a list of all topics in your Kafka cluster securely.
