Migrate to Azure Event Hubs for Apache Kafka Ecosystems

Azure Event Hubs exposes an Apache Kafka endpoint, which enables you to connect to Event Hubs using the Kafka protocol. By making minimal changes to your existing Kafka application, you can connect to Azure Event Hubs and reap the benefits of the Azure ecosystem. Event Hubs works with many of your existing Kafka applications, including MirrorMaker. For more information, see Event Hubs for Apache Kafka


Create an Azure account

If you don't have an Azure subscription, create a free account before you begin.

Create an Event Hubs namespace

Follow step-by-step instructions in the Create an event hub article to create an Event Hubs namespace and an event hub.

Connection string

Follow steps from the Get connection string from the portal article. And, note down the connection string for later use.

Fully qualified domain name (FQDN)

You may also need the FQDN that points to your Event Hub namespace. The FQDN can be found within your connection string as follows:


If your Event Hubs namespace is deployed on a non-public cloud, your domain name may differ (for example, *.servicebus.chinacloudapi.cn, *.servicebus.usgovcloudapi.net, or *.servicebus.cloudapi.de).


Update your Kafka client configuration

To connect to a Kafka-enabled Event Hub, you'll need to update the Kafka client configurations. If you're having trouble finding yours, try searching for where bootstrap.servers is set in your application.

Insert the following configs wherever makes sense in your application. Make sure to update the bootstrap.servers and sasl.jaas.config values to direct the client to your Event Hubs Kafka endpoint with the correct authentication.

sasl.jaas.config=org.apache.kafka.common.security.plain.PlainLoginModule required username="$ConnectionString" password="{CONNECTION STRING TO YOUR NAMESPACE}";

If sasl.jaas.config isn't a supported configuration in your framework, find the configurations that are used to set the SASL username and password and use them instead. Set the username to $ConnectionString and the password to your Event Hubs connection string.


Run your Kafka application that sends events to the event hub. Then, verify that the event hub receives the events using the Azure portal. On the Overview page of your Event Hubs namespace, switch to the Messages view in the Metrics section. Refresh the page to update the chart. It may take a few seconds for it to show that the messages have been received.

Verify that the event hub received the messages

Next steps

To learn more about Event Hubs and Event Hubs for Kafka, see the following articles: