We use tools like event brokers (like Apache Kafka) and message brokers (like RabbitMQ) in our microservice architectures to share data between multiple microservices. If we are following patterns like event sourcing, command sourcing, and asynchronous communication, these messaging tools become more critical components of our architectures.
Some of these tools should be treated as shared infrastructure components that are utilized by multiple microservices. The reasons vary, but the first one is the complexity of the tool/technology that will be deployed. https://goo.gl/2bqkoB
