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This article shows you the sample analysis of microservices and Spring Cloud, which is concise and easy to understand, which will definitely brighten your eyes. I hope you can get something through the detailed introduction of this article.

Micro-service has been very popular in the past two years. Although the exploration and practice of micro-service application architecture and technology began as early as 2010, it was really landed and effectively promoted in the last two years, mainly due to the maturity and commercial application of container technology such as docker and PaaS platform technology.

What is the micro-service architecture

The term "micro-service" comes from a blog post by Martin Fowler. To put it simply, micro-service is a design style of system architecture. Its core is to divide an independent system into multiple subdivided small services. At the same time, these services run independently in their own processes or containers, and the services communicate with each other through RESTful-style API. The split services are built around the system with a certain module or function set, and maintain their own data storage, business development, continuous integration and delivery.

Why micro-service architecture is needed

In the traditional application system architecture, generally due to the limitations of the enterprise organizational structure, architects often build separate projects according to the business lines of the business unit. Then with the development of the business, the business demand is increasing, and the volume of the project gradually becomes bloated. At the same time, with the rapid development of mobile Internet in recent years, the service support of single project to multi-terminal is gradually becoming inadequate. From a continuous integration and delivery point of view, with the bloated single project, some minor program adjustments will be a disaster for the overall project construction and deployment. It is based on this that the micro-service architecture was born and was paid attention to and respected by everyone, and even some people reached the stage of fanaticism, not "micro".

Advantages and disadvantages of micro-service architecture

Architecture and technology eventually have to return to the actual value itself, blindly pursuing hot architecture technology does not mean to reduce the cost of the project, application is the starting point of the architecture. How to choose needs to be judged first from the advantages and disadvantages of the architecture technology itself.

Advantages:

1. The complexity of single service is dismantled, and it is easy for business understanding, development and continuous delivery.

two。 Each service is deployed independently, which is very suitable for grayscale publishing and elastic expansion.

3. There are no technical limitations, and the implementation technology of the service can be optimized according to the actual situation.

4. Unified service API management, services can be used out of the box, which is conducive to the rapid iteration of new products.

5. Combine with PaaS platform to realize DevOps perfectly.

Deficiency:

1. A large number of independent service processes increase the difficulty of testing, operation and management.

two。 The inherent complexity of distributed architecture, system fault tolerance, network delay, distributed transactions, asynchronous messages and so on.

3. The cost of infrastructure construction is high, and the construction cost of PaaS platform, continuous delivery and service monitoring is high.

Although the micro-service architecture has many shortcomings and problems, its advantages such as agile development and automated deployment are still widely respected, so solving these shortcomings has become the goal of great experts.

Basic elements of microservice architecture

Basic elements

Service gateway: through routing configuration and registry to unify through API services, while providing service load.

Service registry: mainly manages the publication and subscription of services.

Service provider: the specific implementation and provider of API services.

Spring Cloud and Micro Services

Spring Cloud is a set of ecological implementations of micro-service architecture, and it is a micro-service architecture development tool based on Spring Boot implementation. It provides a set of simple development methods for configuration management, service governance, circuit breaker, intelligent routing, micro-agent, control bus, global lock, decision campaign, distributed session and cluster state management involved in micro-service architecture.

Introduction to the main components of Spring Cloud

Spring Cloud Config: a configuration management tool that supports the use of Git to store configuration content, externalized storage of application configuration, client configuration information refresh, encryption / decryption of configuration content, etc.

Spring Cloud Netflix: core component that integrates multiple Netflix OSS open source suites.

1. Eureka: a service governance component, including the implementation of service registry and service registration in the discovery mechanism.

2. Hystrix: fault-tolerant management component, which implements circuit breaker mode, helps delay in service dependence and provides strong fault tolerance for obstacles.

3. Ribbon: the service invocation component of the client load policy.

4. Feign: a declarative service invocation component based on Ribbon and Hystrix.

5. Zuul: gateway component, which provides intelligent routing, access filtering and other functions.

6. Archaius: externalize the configuration component.

Spring Cloud Bus: event, message bus, used to propagate state changes or events in the cluster for processing after departure, such as to dynamically refresh the configuration.

Spring Cloud Cli: a Spring Boot CLI plug-in for quickly creating Spring Cloud applications in Groovy.

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The above is the example analysis of microservices and Spring Cloud. Have you learned any knowledge or skills? If you want to learn more skills or enrich your knowledge reserve, you are welcome to follow the industry information channel.

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