Microservices Communication Design

Question

I would like to know how to create a communication for each services. I am using API Gateway for the outside of the system to communicate with the services within. Is it necessary for a service to call another service through API Gateway or just directly into the service itself ?

Thank You

Answer 1

You can design your communications strategies in many ways. Obviously you can use your API Gateway to do this (I assume that you are using this pattern ) but this isn't a good idea because to begin it is not a good use of the pattern and for other hand many people think that the use of apirests should never be used to inter-communication of mservices. One a best approach to make this instead is base the communications on asynchronous message-passing, to do this you can use Publish–subscribe pattern , but always you can take a look to Event Pattern very used too.

This is a simple list of some articles that maybe could help you, take a look:

• Building Microservices: Inter-Process Communication in a Microservices Architecture
• Why RESTful communication between microservices can be perfectly fine
• Pattern: Messaging
• Technical Approach of Inter-Service Communication

Is a lot of info if you don't have previous experience in this issues but with a bit of researching you will find soon a good strategy to use in you project.

Answer 2

内部服务与服务之间的通信不需要Api网关，但是，您需要服务注册表或某种动态负载平衡机制才能访问服务