Chapter 2. Try AMQ Streams

Procedure

1. Download the amq-streams-x.y.z-ocp-install-examples.zip file from the AMQ Streams download site.

2. Unzip the file to any destination.

   • On Windows or Mac, you can extract the contents of the ZIP archive by double clicking on the ZIP file.

   • On Red Hat Enterprise Linux, open a terminal window in the target machine and navigate to where the ZIP file was downloaded.

     Extract the ZIP file by executing the following command:

     unzip amq-streams-x.y.z-ocp-install-examples.zip

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Procedure

1. Login in to the OpenShift cluster with cluster admin privileges.

   For example:

   oc login -u system:admin

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2. Create a new kafka (project) namespace for the AMQ Streams Kafka Cluster Operator.

   oc new-project kafka

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3. Modify the installation files to reference the new kafka namespace where you will install the AMQ Streams Kafka Cluster Operator.

   Note

   By default, the files work in the myproject namespace.

   • On Linux, use:

     sed -i 's/namespace: .*/namespace: kafka/' install/cluster-operator/*RoleBinding*.yaml

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   • On Mac, use:

     sed -i '' 's/namespace: .*/namespace: kafka/' install/cluster-operator/*RoleBinding*.yaml

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4. Deploy the CRDs and role-based access control (RBAC) resources to manage the CRDs.

   oc new-project kafka
   oc apply -f install/cluster-operator/

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5. Create a new my-kafka-project namespace where you will deploy your Kafka cluster.

   oc new-project my-kafka-project

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6. Give access to my-kafka-project to a non-admin user developer.

   For example:

   oc adm policy add-role-to-user admin developer -n my-kafka-project

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7. Give permission to the Cluster Operator to watch the my-kafka-project namespace.

   oc set env deploy/strimzi-cluster-operator STRIMZI_NAMESPACE=kafka,my-kafka-project -n kafka

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   oc apply -f install/cluster-operator/020-RoleBinding-strimzi-cluster-operator.yaml -n my-kafka-project

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   oc apply -f install/cluster-operator/032-RoleBinding-strimzi-cluster-operator-topic-operator-delegation.yaml -n my-kafka-project

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   oc apply -f install/cluster-operator/031-RoleBinding-strimzi-cluster-operator-entity-operator-delegation.yaml -n my-kafka-project

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   The commands create role bindings that grant permission for the Cluster Operator to access the Kafka cluster.

8. Create a new cluster role strimzi-admin.

   oc apply -f install/strimzi-admin

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9. Add the role to the non-admin user developer.

   oc adm policy add-cluster-role-to-user strimzi-admin developer

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Procedure

1. Log in to the my-kafka-project namespace as user developer.

   For example:

   oc login -u developer
   oc project my-kafka-project

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   After new users log in to OpenShift Container Platform, an account is created for that user.

2. Create a new my-cluster Kafka cluster with 3 Zookeeper and 3 broker nodes.

   • Use ephemeral storage

   • Expose the Kafka cluster outside of the OpenShift cluster using an external listener configured to use route.

     cat << EOF | oc create -f -
     apiVersion: kafka.strimzi.io/v1beta1
     kind: Kafka
     metadata:
       name: my-cluster
     spec:
       kafka:
         replicas: 3
         listeners:
           plain: {}
           tls: {}
           external:
             type: route
         storage:
           type: ephemeral
       zookeeper:
         replicas: 3
         storage:
           type: ephemeral
       entityOperator:
         topicOperator: {}
     EOF

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3. Wait for the cluster to be deployed:

   oc wait kafka/my-cluster --for=condition=Ready --timeout=300s -n kafka

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4. Now that your cluster is running, create a topic to publish and subscribe from your external client.

   Create the following my-topic custom resource definition with 3 replicas and 3 partitions in the my-cluster Kafka cluster:

   cat << EOF | oc create -f -
   apiVersion: kafka.strimzi.io/v1beta1
   kind: KafkaTopic
   metadata:
     name: my-topic
     labels:
       strimzi.io/cluster: "my-cluster"
   spec:
     partitions: 3
     replicas: 3
   EOF

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Procedure

1. Find the address of the bootstrap route:

   oc get routes my-cluster-kafka-bootstrap -o=jsonpath='{.status.ingress[0].host}{"\n"}'

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   Use the address together with port 443 in your Kafka client as the bootstrap address.

2. Extract the public certificate of the broker certification authority:

   oc extract secret/my-cluster-cluster-ca-cert --keys=ca.crt --to=- > ca.crt

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3. Import the trusted certificate to a truststore:

   keytool -keystore client.truststore.jks -alias CARoot -import -file ca.crt

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   You are now ready to start sending and receiving messages.

Procedure

1. Download the latest version of the AMQ Streams archive (amq-streams-x.y.z-bin.zip) from the AMQ Streams download site.

   Unzip the file to any destination.

2. Open a terminal and start the Kafka console producer with the topic my-topic and the authentication properties for TLS:

   bin/kafka-console-producer.sh --broker-list <route-address>:443 --producer-property security.protocol=SSL --producer-property ssl.truststore.password=password --producer-property ssl.truststore.location=./client.truststore.jks --topic my-topic

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3. Type your message into the console where the producer is running.
4. Press Enter to send the message.

5. Open a new terminal tab or window and start the Kafka console consumer to receive the messages:

   bin/kafka-console-consumer.sh --bootstrap-server <route-address>:443 --consumer-property security.protocol=SSL --consumer-property ssl.truststore.password=password --consumer-property ssl.truststore.location=./client.truststore.jks --topic my-topic --from-beginning

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6. Confirm that you see the incoming messages in the consumer console.
7. Press Crtl+C to exit the Kafka console producer and consumer.