"Springcloud" (1)---springcloud introductory article

Springcloud understand the article

I. Overview of MICRO Services1, what is micro-service

The current micro-service does not have a unified standard, is generally divided into business to the traditional one-stop application, split into a service, completely to the coupling, a micro-service is a single-function business, only do one thing.

The opposite of the micro-service is called the boulder.

2. Micro-service and micro-service architecture

• MicroServices are an architectural pattern or an architectural style that advocates dividing a single application into a small set of services = = Standalone Deployment = =, the services are coordinated and co-ordinated, and each service runs in its own = = Process = =.
• Lightweight communication between services and services, such as the RESTful API for HTTP
• Avoid a unified, centralized service management mechanism

3. Advantages and disadvantages of micro-service

Advantages

1. Each service is cohesive enough to be small enough to focus easily
2. Development is simple and efficient, and a service only does one thing
3. Development team small, generally 2-5 people enough (of course, according to the actual subject)
4. MicroServices are loosely coupled, both development and deployment can be done independently
5. Micro-services can be developed in different languages
6. Easy and third-party integration, microservices allow easy and flexible automated integration deployments (continuous integration tools with Jenkins,hudson,bamboo, etc.)
7. MicroServices are easily understood, modified, and maintained by developers, allowing small teams to focus more on their work, without having to work together to reflect value
8. MicroServices allow you to incorporate the latest technology
9. = = MicroServices are just code for business logic and do not fuse = = with html,css or other interface components.
10. = = Each micro-service can have its own storage capacity, the database can be owned or unified, very flexible = =.

Disadvantages

1. Developers to deal with the complexities of distributed systems
2. Multi-service operational difficulty, with the increase in service, operation and maintenance of pressure will also increase
3. Dependent System Deployment
4. Cost of inter-service communication
5. Consistency of data
6. System Integration Testing
7. The difficulty of performance monitoring

4, micro-service technology stack

Micro-Service entry	Landing Technology
Service development	Springboot,spring,springmvc
Service Configuration and Management	Netflix's Archaius, Ali's diamond, etc.
Service Registration and Discovery	Eureka, Consul, zookeeper, etc.
Service invocation	Rest, RPC, GRPC
Service Fuse	Hystrix, envoy, etc.
Load Balancing	Ribbon, Nginx, etc.
Service Interface Invocation (a simplified tool for client invocation of services)	Feign, etc.
Message Queuing	Kafka, RabbitMQ, ACTIVEMQ, etc.
Service Configuration Center Management	Springcloudconfig, chef, etc.
Service Routing (API Gateway)	Zuul, etc.
Service Monitoring	Zabbix, Nagios, Metrics, specatator, etc.
Full Link Tracking	Zipkin, brave, dapper, etc.
Service Deployment	Docker, OpenStack, kubernetes, etc.
Data Flow Operations Development Package	Springcloud Stream (Package and Redis,rabbit,kafka, etc. send to receive messages)
Event message Bus	Springcloud Bus

Ii. Overview of Springcloud Introduction

Spring's three main modules: Springboot (build), Spring Cloud (orchestration), Spring Cloud Data Flow (Connect)

1. What is Springcloud?

• Simplified version of Distributed Systems (official introduction)
• Springcloud provides a complete suite of microservices solutions based on Springboot, including service registration and Discovery , Configuration Center , full link monitoring , service Gateway , load Balancing , fuses and other components , in addition to the high-abstraction package based on Netflix's open source components, there are some types of neutral open source components
• Springcloud simplifies the infrastructure development of distributed systems with the development convenience of Springboot, Springcloud provides developers with tools to quickly build distributed systems, including configuration management, service discovery, circuit breakers, routing, micro-proxies, event busses, Global, decision-making, distributed sessions, and so on, they can be started and deployed with Springboot development style.
• = = In a nutshell: Springcloud is a one-stop solution under the distributed micro-service architecture, and it is the geometry of each microservices architecture landing technology, commonly known as the Micro service family bucket = =

2. The relationship between Springcloud and Springboot

Springboot: Focus on rapid and convenient development of individual micro-services (focus on micro)

Springcloud: Focus on the global micro-service Coordination governance framework, the springboot development of a single micro-service group management together (focus on macro)

Note : Springboot can leave springcloud for standalone use, but Springcloud can not leave Springboot, which is a dependency

3,Dubbo and Springcloud comparison

	Dubbo	Spring
Service Registration Center	Zookeeper	Spring Cloud NETFILX Eureka
Service invocation Mode	Rpc	REST API
Service Monitoring	Dubbo-monitor	Spring Boot Admin
Circuit Breaker	Not perfect	Spring Cloud Netflix Hystrix
Service Gateway	No	Spring Cloud Netflix Zuul
Distributed configuration	No	Spring Cloud Config
Service tracking	No	Spring Cloud Sleuth
Message bus	No	Spring Cloud Bus
Data flow	No	Spring Cloud Stream
Bulk tasks	No	Spring Cloud Task

Maximum Difference

(1) Spring cloud discards RPC traffic and uses an HTTP-based rest approach. Spring Cloud sacrifices the performance of service invocations, but it also avoids the problems caused by native RPC. Rest is more flexible than RPC, there is no code-level strong dependency, and the emphasis on rapid evolution

Micro-service environment, it is clearly more appropriate.

(2) Dubbo-like Assembly machine, Spring cloud-like all-in-one machine

(3) Community support and strength: Dubbo has been suspended for 5 years, although restarted, but the new demand for technology development, or the need for developers to expand their own, for small and medium-sized companies, it seems more time-consuming and laborious, there is not necessarily a strong ability to modify the source code

Summarize

The problem domain is not the same: Dubbo is positioned as an RPC framework, and the goal of Spring Cloud is a one-stop solution under the microservices architecture

think too much, do too little, the middle of the gap is trouble. Want to have no trouble, either don't think, or do more. Lieutenant Colonel "8"

"Springcloud" (1)---springcloud introductory article