Amazon MSK in Kafka - Commands & Configuration

Introduction

Amazon MSK is a service that makes it easy to run Apache Kafka without managing servers. It solves the problem of setting up and maintaining Kafka clusters by handling the infrastructure for you.

When you want to stream data between applications without managing Kafka servers yourself

When you need a reliable system to process real-time data like logs or user activity

When you want to scale Kafka easily as your data grows

When you want to integrate Kafka with other AWS services securely

When you want to reduce operational overhead of running Kafka clusters

Commands

This command creates a new Amazon MSK cluster named 'example-cluster' with 3 broker nodes of type kafka.m5.large in the specified subnet and security group.

Terminal

aws kafka create-cluster --cluster-name example-cluster --kafka-version 3.4.0 --number-of-broker-nodes 3 --broker-node-group-info InstanceType=kafka.m5.large,ClientSubnets=subnet-0bb1c79de3EXAMPLE,SecurityGroups=sg-0a123b456c789d012

Expected Output

{

  "ClusterArn": "arn:aws:kafka:us-east-1:123456789012:cluster/example-cluster/abcd1234-abcd-1234-abcd-1234abcd5678",

  "State": "CREATING"

}

→

--cluster-name - Sets the name of the Kafka cluster

→

--kafka-version - Specifies the Kafka version to use

→

--number-of-broker-nodes - Defines how many broker nodes the cluster will have

This command checks the status and details of the Kafka cluster to see if it is ready to use.

Terminal

aws kafka describe-cluster --cluster-arn arn:aws:kafka:us-east-1:123456789012:cluster/example-cluster/abcd1234-abcd-1234-abcd-1234abcd5678

Expected Output

{

  "ClusterInfo": {

    "ClusterName": "example-cluster",

    "State": "ACTIVE",

    "NumberOfBrokerNodes": 3,

    "KafkaVersion": "3.4.0"

  }

}

→

--cluster-arn - Specifies the unique identifier of the Kafka cluster

This command lists all the Kafka clusters in your AWS account to confirm your cluster is created.

Terminal

aws kafka list-clusters

Expected Output

{

  "ClusterInfoList": [

    {

      "ClusterName": "example-cluster",

      "ClusterArn": "arn:aws:kafka:us-east-1:123456789012:cluster/example-cluster/abcd1234-abcd-1234-abcd-1234abcd5678",

      "State": "ACTIVE"

    }

  ]

}

Key Concept

If you remember nothing else from this pattern, remember: Amazon MSK lets you run Kafka clusters easily by managing the servers and scaling for you.

Common Mistakes

Using incorrect subnet IDs or security group IDs when creating the cluster

The cluster creation will fail or the brokers won't be accessible if network settings are wrong

Verify subnet and security group IDs exist and belong to the correct VPC before running the create command

Not waiting for the cluster state to become ACTIVE before using it

Trying to produce or consume messages before the cluster is ready will cause connection errors

Use the describe-cluster command to check the cluster state and wait until it shows ACTIVE

Summary

Create an Amazon MSK cluster with aws kafka create-cluster specifying name, version, nodes, and network settings.

Check the cluster status with aws kafka describe-cluster to ensure it is ACTIVE before use.

List all clusters with aws kafka list-clusters to confirm your cluster exists and is running.