0
0
Microservicessystem_design~12 mins

Message brokers (Kafka, RabbitMQ) in Microservices - Architecture Diagram

Choose your learning style9 modes available
LearnWhyDeepArchPracticeChallengeDesignRecallScale
System Overview - Message brokers (Kafka, RabbitMQ)

This system uses message brokers like Kafka or RabbitMQ to enable communication between microservices. It ensures reliable, asynchronous message delivery, decoupling services and improving scalability and fault tolerance.

Architecture Diagram
User
  |
  v
API Gateway
  |
  v
Producer Service
  |
  v
+-----------------+
| Message Broker   |
| (Kafka/RabbitMQ) |
+-----------------+
  |           |
  v           v
Consumer A   Consumer B
  |           |
  v           v
Database A  Database B
Components
User
user
Initiates requests to the system
API Gateway
api_gateway
Receives user requests and routes them to appropriate services
Producer Service
service
Sends messages to the message broker
Message Broker (Kafka/RabbitMQ)
message_queue
Manages message storage and delivery between producers and consumers
Consumer A
service
Receives messages from the broker and processes them
Consumer B
service
Receives messages from the broker and processes them
Database A
database
Stores data processed by Consumer A
Database B
database
Stores data processed by Consumer B
Request Flow - 7 Hops
User → API Gateway
API Gateway → Producer Service
Producer Service → Message Broker (Kafka/RabbitMQ)
Message Broker (Kafka/RabbitMQ) → Consumer A
Consumer A → Database A
Message Broker (Kafka/RabbitMQ) → Consumer B
Consumer B → Database B
Failure Scenario
Component Fails:Message Broker (Kafka/RabbitMQ)
Impact:Messages cannot be delivered to consumers, causing delays or loss of communication between services.
Mitigation:Use broker replication and failover clusters to maintain availability; producers can retry sending messages; consumers can process messages from broker once it recovers.
Architecture Quiz - 3 Questions
Test your understanding
Which component is responsible for storing and forwarding messages between services?
AProducer Service
BMessage Broker (Kafka/RabbitMQ)
CAPI Gateway
DDatabase A
Design Principle
This architecture demonstrates how message brokers enable asynchronous communication between microservices, improving system scalability, reliability, and decoupling by buffering messages and allowing independent processing.