Amazon Managed Streaming for Apache Kafka Construct Library

AWS CDK v1 has reached End-of-Support on 2023-06-01. This package is no longer being updated, and users should migrate to AWS CDK v2.

For more information on how to migrate, see the Migrating to AWS CDK v2 guide.

Amazon MSK is a fully managed service that makes it easy for you to build and run applications that use Apache Kafka to process streaming data.

The following example creates an MSK Cluster.

declare const vpc: ec2.Vpc;
const cluster = new msk.Cluster(this, 'Cluster', {
  clusterName: 'myCluster',
  kafkaVersion: msk.KafkaVersion.V2_8_1,
  vpc,
});

Allowing Connections

To control who can access the Cluster, use the .connections attribute. For a list of ports used by MSK, refer to the MSK documentation.

declare const vpc: ec2.Vpc;
const cluster = new msk.Cluster(this, 'Cluster', {
  clusterName: 'myCluster',
  kafkaVersion: msk.KafkaVersion.V2_8_1,
  vpc,
});

cluster.connections.allowFrom(
  ec2.Peer.ipv4('1.2.3.4/8'),
  ec2.Port.tcp(2181),
);
cluster.connections.allowFrom(
  ec2.Peer.ipv4('1.2.3.4/8'),
  ec2.Port.tcp(9094),
);

Cluster Endpoints

You can use the following attributes to get a list of the Kafka broker or ZooKeeper node endpoints

declare const cluster: msk.Cluster;
new CfnOutput(this, 'BootstrapBrokers', { value: cluster.bootstrapBrokers });
new CfnOutput(this, 'BootstrapBrokersTls', { value: cluster.bootstrapBrokersTls });
new CfnOutput(this, 'BootstrapBrokersSaslScram', { value: cluster.bootstrapBrokersSaslScram });
new CfnOutput(this, 'ZookeeperConnection', { value: cluster.zookeeperConnectionString });
new CfnOutput(this, 'ZookeeperConnectionTls', { value: cluster.zookeeperConnectionStringTls });

Importing an existing Cluster

To import an existing MSK cluster into your CDK app use the .fromClusterArn() method.

const cluster = msk.Cluster.fromClusterArn(this, 'Cluster', 
  'arn:aws:kafka:us-west-2:1234567890:cluster/a-cluster/11111111-1111-1111-1111-111111111111-1',
);

Client Authentication

MSK supports the following authentication mechanisms.

Only one authentication method can be enabled.

TLS

To enable client authentication with TLS set the certificateAuthorityArns property to reference your ACM Private CA. More info on Private CAs.

import * as acmpca from '@aws-cdk/aws-acmpca';

declare const vpc: ec2.Vpc;
const cluster = new msk.Cluster(this, 'Cluster', {
  clusterName: 'myCluster',
  kafkaVersion: msk.KafkaVersion.V2_8_1,
  vpc,
  encryptionInTransit: {
    clientBroker: msk.ClientBrokerEncryption.TLS,
  },
  clientAuthentication: msk.ClientAuthentication.tls({
    certificateAuthorities: [
      acmpca.CertificateAuthority.fromCertificateAuthorityArn(
        this,
        'CertificateAuthority',
        'arn:aws:acm-pca:us-west-2:1234567890:certificate-authority/11111111-1111-1111-1111-111111111111',
      ),
    ],
  }),
});

SASL/SCRAM

Enable client authentication with SASL/SCRAM:

declare const vpc: ec2.Vpc;
const cluster = new msk.Cluster(this, 'cluster', {
  clusterName: 'myCluster',
  kafkaVersion: msk.KafkaVersion.V2_8_1,
  vpc,
  encryptionInTransit: {
    clientBroker: msk.ClientBrokerEncryption.TLS,
  },
  clientAuthentication: msk.ClientAuthentication.sasl({
    scram: true,
  }),
});

SASL/IAM

Enable client authentication with IAM:

declare const vpc: ec2.Vpc;
const cluster = new msk.Cluster(this, 'cluster', {
  clusterName: 'myCluster',
  kafkaVersion: msk.KafkaVersion.V2_8_1,
  vpc,
  encryptionInTransit: {
    clientBroker: msk.ClientBrokerEncryption.TLS,
  },
  clientAuthentication: msk.ClientAuthentication.sasl({
    iam: true,
  }),
});