Microservice design analysis report based on Spring Cloud

In recent years, microservice architecture has become all the rage and has become the first choice for many enterprises. Compared with traditional single applications, the microservice architecture divides the application into several services. Each service can be run and upgraded independently, and at the same time, a complex system is formed through network communication. At the same time, Spring Cloud, as the microservice solution of the Spring family, is highly respected and sought after by developers. This article will analyze the Spring Cloud microservice design in detail starting from three aspects: microservice fault handling, application configuration and registration center.

1. Microservice fault handling

Under the microservice architecture, the increase in the number of services makes the calls between services very complicated, which makes fault handling essential in microservice design. Less part. Spring Cloud implements fault handling in a variety of ways.

1. Circuit Breaker

If one service is unavailable, the entire system may fail. To solve this situation, Spring Cloud provides Circuit Breaker. Circuit breakers allow developers to define actions to be taken when a dependent service fails, such as returning a default value or displaying an error message. At the same time, the circuit breaker will work hard to avoid a large number of requests hitting the unavailable service in a short period of time. Corresponding implementations of circuit breakers include Hystrix and Resilience4j.

2. Distributed Tracing

In order to facilitate monitoring and timely troubleshooting of faults, Spring Cloud provides a distributed tracing function. By tracking and analyzing calls between services, we can easily find the cause of the failure and quickly locate the problem. Spring Cloud Sleuth and Zipkin are two common components that support distributed tracing.

2. Application configuration

Under the microservice architecture, each service has its own configuration file. Spring Cloud provides multiple configuration methods.

1. Local configuration file

In addition to the original application.properties and application.yml, Spring Boot also provides a cloud configuration solution based on configuration files---Spring Cloud Config. Store the application's configuration file in the Git repository, and obtain the configuration information by accessing the remote configuration center when the application starts, thereby centrally managing the configuration information of all applications.

2. Environment variables

Spring Cloud supports passing application configuration information through environment variables, and can also pass configurations between services. In this way, applications can be quickly deployed in different environments and ensure configuration consistency.

3. Registration Center

Microservice architecture requires a mechanism to connect various services in the system. Spring Cloud provides a registration center to solve this problem. The registry is a coordination service that allows services to register on it and provides a lookup and communication mechanism between clients and services.

1.Eureka

Eureka is the most widely used registry in Spring Cloud, which can improve the availability of applications. Eureka is client-based, so all clients can discover services through Eureka and negotiate calls. This mechanism can help us deal with problems caused by the joining and leaving of instances, and dynamically update the service list.

2.Consul

Consul is another powerful registration center, unlike Eureka which only provides service discovery and registration functions. Consul also provides a package of solutions, such as a configuration center based on KV storage, RPC request forwarding and security mechanisms, etc. As a registration center with more complete functions, Consul has also become the first choice of many enterprises.

This article only covers the basic knowledge of microservice design, but it is enough for readers to understand the design ideas of Spring Cloud microservices. During the actual development process, developers can choose appropriate solutions based on specific scenarios and needs. I believe that readers have a comprehensive understanding of Spring Cloud microservice design through this article, and hope that it can be practiced in actual projects.

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