Springcloud (a): Introduction to Spring Cloud

Spring Cloud is an ordered collection of frames. It uses spring boot's development convenience to subtly simplify the development of distributed system infrastructures, such as service discovery registration, Configuration center, message bus, load balancer, circuit breakers, data monitoring, and so on, all of which can be started and deployed with spring boot development style. Spring does not reinvent the wheel, it simply combines the more mature and proven service frameworks currently developed by companies, masking the complexities of configuration and implementation through the spring boot style, and ultimately leaving developers with a set of easy-to-understand, Easy-to-deploy and maintainable Distributed system Development Kit.

MicroServices are service units that can be deployed independently, horizontally scaled, independently accessible (or have a separate database), Springcloud is the butler of these microservices, and with the micro-service architecture, the number of projects can be very large, and Springcloud as a big housekeeper needs to manage these microservices, Nature needs a lot of little brother to help.

Main: Spring Cloud Config, Spring Cloud Netflix (Eureka, Hystrix, Zuul, Archaius ... ), Spring Cloud Bus, Spring Cloud for Cloud Foundry, Spring Cloud Cluster, Spring Cloud Consul, Spring Cloud Security, Spring Cl Oud Sleuth, Spring Cloud Data Flow, Spring Cloud Stream, Spring Cloud Task, Spring Cloud Zookeeper, Spring cloud connectors, SPR ing cloud starters, Spring Cloud CLI, each younger brother with a unique stunt martial arts strength below to do a brief introduction.

Core members
Spring Cloud Netflix
This is a big boss, second only to the boss, the boss of various services rely on it, with a variety of Netflix OSS components integration, the core of the micro-service, its younger brother mainly have Eureka, Hystrix, Zuul, Archaius ... Too much

Netflix Eureka

Service Center, Cloud service discovery, a REST-based service for locating services to enable mid-tier service discovery and failover in the cloud. This is springcloud the most nose of the younger brother, service center, any younger brother need to support anything from here to take, the same you have what unique martial arts have hurried over the report, convenient for other younger brother to call; its advantage is that you do not need to find all kinds of little brother support, Just need to go to the service center to pick up, do not need to know the support of the other brother where, or a few younger brother to support, anyway to use on the line, service center to ensure stability and quality.

Netflix Hystrix

fuses, fault-tolerant management tools, designed to control the nodes of services and third-party libraries through a fusing mechanism, providing greater fault tolerance for latency and failure. For example, suddenly a younger brother is ill, but you also need its support, and then after the call it does not respond, you do not know, has been waiting for this response; there may be other younger brother is also calling your martial arts stunt, then when the request is more, there will be serious obstruction affecting the overall plan of the boss. This time hystrix come in handy, when Hystrix found a little brother not in the state of instability immediately immediately let it off the line, let other younger brother come to the top, or to you said don't have to wait for this younger brother today certainly not, why do hurry to do not in this queue.

Netflix Zuul

Zuul is a framework for providing dynamic routing, monitoring, resiliency, security and other edge services on cloud platforms. Zuul corresponds to the front door of all requests from the Web site backend of the device and Netflix streaming app. When other door sent to look for eldest brother must first go through the Zuul, see if there is a knife or something to intercept back, or need to find that little brother directly to take the past.

Netflix Archaius

The Configuration Management API, which includes a series of configuration management APIs, provides features such as dynamic typed properties, thread-safe configuration operations, polling frameworks, callback mechanisms, and more. Can be implemented dynamically to obtain the configuration, the principle is every 60s (default, configurable) from the configuration source read the content, so modify the configuration file does not need to restart the service can make the modified content to take effect, the premise use Archaius API to read.

Spring Cloud Config
Commonly known as the configuration Center, the Configuration Management Toolkit lets you put the configuration on a remote server, centralize the management of the cluster configuration, and currently supports local storage, git, and subversion. Is that after all the weapons, guns fire what things are concentrated put together, do not casually take their own, convenient later unified management, upgrade equipment.

Spring Cloud Bus
event, message bus, used to propagate state changes in a cluster (for example, configuration change events), which can be combined with Spring Cloud config for hot deployment. Equivalent to the water margin in the day 800 in the Dai Zong of God, to ensure that the message between the younger brother keep unblocked.

Spring Cloud for Cloud Foundry
Cloud Foundry is the industry's first open source PAAs cloud platform from VMware, supporting a broad range of frameworks, languages, runtime environments, cloud platforms, and application services, enabling developers to deploy and scale applications in seconds without worrying about any infrastructure issues

In fact, it is a set of solutions integrated with Cloudfoundry, embracing the thighs of cloud foundry.

Spring Cloud Cluster
Spring Cloud cluster will replace spring integration. Provide the basic function support of the cluster in the distributed system, such as: election, state consistency of cluster, global lock, tokens and other common state pattern abstraction and implementation.

If you organize different gangs into a unified whole, Spring Cloud cluster has provided you with a lot of handy tools for organizing.

Spring Cloud Consul
Consul is a service software that supports distributed, highly available service discovery and configuration sharing in multiple datacenters, developed by Hashicorp in the Go language, and open source based on the Mozilla Public License 2.0 protocol. Consul supports health checks and allows HTTP and DNS protocol call APIs to store key-value pairs.

Spring Cloud Consul encapsulates Consul operations, and Consul is a service discovery and Configuration tool that integrates seamlessly with Docker containers.

Other Members
Spring Cloud Security

Add security controls to your application based on the Spring Security Toolkit. This little brother is a bull nose specifically responsible for the security of the whole gang, set up different portals to access specific resources, can not be the cheats sunflower Treasure Book leaked.

Spring Cloud Sleuth

The Log Collection toolkit, which encapsulates dapper and log-based tracing as well as Zipkin and htrace operations, implements a distributed tracking solution for Springcloud applications.

Spring Cloud Data Flow

Data flow is a unified programming model and managed services for developing and executing a wide range of data processing patterns including ETL, batch operations, and continuous operations.

For a composable microservices program in a modern operating environment, Spring cloud data flow is a native cloud-configurable service. With spring Cloud data flow, developers can create and orchestrate data pipelines for common use cases like data extraction, real-time analytics, and data import/export.

Spring Cloud Data flow is a redesign of spring XD based on the native cloud, which aims to streamline the development of big data applications. Spring XD's stream processing and batch module refactoring are based on the spring boot stream and Task/batch's microservices program. These programs are now automated deployment units and they are native to modern environments such as Cloud Foundry, Apache YARN, Apache Mesos, and Kubernetes.

Spring Cloud Data Flow provides a range of models and best practices for microservices-based distributed stream processing and batch data channels.

Spring Cloud Stream

Spring Cloud Stream is the framework for creating message-driven microservices apps. Spring Cloud Stream is created based on spring boot to create a separate/industrial-level spring application that uses spring integration to provide a connection to the message broker. The Data flow Operation development package encapsulates the sending and receiving messages with Redis,rabbit, Kafka, and so on.

A business involves multiple tasks, and the tasks are triggered by events, and that's what spring Cloud stream is going to do.

Spring Cloud Task

Spring Cloud task mainly solves the task management of short-lived microservices, task scheduling, for example, some scheduled tasks run at night, or some data analysis to run a few times.

Spring Cloud Zookeeper

Zookeeper is a distributed, open source distributed application Coordination Service that is an open source implementation of Google's chubby and an important component of Hadoop and HBase. It is a software that provides consistent services for distributed applications, including configuration maintenance, domain name services, distributed synchronization, group services, and so on. The goal of zookeeper is to encapsulate complex and error-prone services that provide users with easy-to-use interfaces and performance-efficient, robust systems.

Operation Zookeeper Toolkit for service discovery and configuration management Using zookeeper mode, hugging zookeeper thighs.

Spring Cloud Connectors

Spring Cloud Connectors simplifies the process of connecting to services and getting operations from the cloud platform, and is highly scalable to build your own cloud platform with spring cloud connectors.

Enables cloud-based applications to connect to the backend in a variety of PAAs platforms, such as database and message broker services.

Spring Cloud Starters

Spring Boot-based startup project provides spring cloud with out-of-the-box dependency management.

Spring Cloud CLI

Based on the Spring Boot CLI, you can quickly set up cloud components on a command-line basis.

What's the relationship with spring Boot?
Spring boot is a set of spring's fast-provisioning scaffolding that enables rapid development of a single microservices based on spring boot, and Spring cloud is a spring boot-based cloud application development tool; Spring boot focuses on fast, A single individual that is easy to integrate, Spring Cloud is a global service governance framework; Spring boot uses a default greater than the configuration concept, many integration options have been chosen for you, can not be configured without configuration, a large part of Spring cloud is based on spring Boot to implement, can not be based on spring boot? No.

Spring boot can leave spring cloud to use the development project independently, but spring cloud is dependent on spring boot.

Spring, Spring booot > Spring Cloud.

The benefits of Spring cloud
Micro-service Framework so many such as: Dubbo, Kubernetes, why should you use Spring cloud?

Spring in the production of the family, spring in the enterprise-level development framework of no one can rival, a big, can guarantee the subsequent update, perfect. For example, Dubbo is almost dead now.
Spring boot this independent gan can save a lot of things, big and small live spring boot are doing quite well.
As a micro-service governance of the big guy, considered very comprehensive, almost all aspects of service governance are taken into account, easy to develop out of the box.
Spring Cloud is highly active, the tutorials are rich, and it's easy to find a solution when you encounter problems
A few lines of code to complete the fuse, the balance of responsibility, service center of the various platform functions
Spring Cloud is a boon for small and medium-sized internet companies, which often have little or no money to develop their own distributed system infrastructure, and the spring cloud one-stop solution can dramatically reduce development costs while managing business growth. At the same time, with the popularity of the microservices architecture and Docker container concept in recent years, Spring Cloud will have a niche in the future of "cloud" software development style, especially in the current variety of distributed solutions to provide a standardized, full-site technology solutions, The meaning may be comparable to the birth of the current servlet specification, and effectively advance the technical level of software system in the server. Source source technical support for complete projects 2147775633

Springcloud (a): Introduction to Spring Cloud