Launch Aspire (if it's not already running). See:
For details on using the Aspire Content Source Management page, refer to Admin UI.
Follow the step from the Configuration Tutorial of the connector of your choice. Please refer to the Connector list.
Add a Publish to Avro File, drag from the Publish to Avro File rule from the Workflow Library and drop to the Workflow Tree where you want it.
This will automatically open the Publish to Avro File window for the configuration of the publisher.
In the Publish to Avro File window, specify connection information to publish to the Avro File.
After you click Add, it will take a moment for Aspire to download all of the necessary components (Jar files) from the Maven repository and load them into Aspire.
After that's done, the publisher will appear in the Workflow Tree.