springcloud- registry quickly build

1. Scene Description

springcloud provides a complete set of solutions to build distributed systems possible, so that businesses / developers to quickly communicate with distributed systems, to quickly build a registry under springcloud Eureka today.

2. Solution

Introduction 2.1 springcloud

COORDINATE ANYTHING: DISTRIBUTED SYSTEMS SIMPLIFIED

Building distributed systems doesn't need to be complex and error-prone. Spring Cloud offers a simple and accessible programming model to the most common distributed system patterns, helping developers build resilient, reliable, and coordinated applications. Spring Cloud is built on top of Spring Boot, making it easy for developers to get started and become productive quickly.

2.2 Construction of the project

Idea Ultimate Edition used, springcloud project itself springboot project ( relationship springboot and springcloud's ).

First, create a project in the idea of: file -> new -> project

After two default next Select Components

The default next-> finish

2.3 configuration file pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.spc</groupId>
    <artifactId>eurekaserver</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>eurekaserver</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.SR1</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

Description:

(1) springcloud itself is springboot project, the new springboot project.

(2) requires two starter, eureka-server and eureka-client

2.4 application启动类

package com.spc.eurekaserver;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@SpringBootApplication
@EnableEurekaServer
public class EurekaserverApplication {

    public static void main(String[] args) {
        SpringApplication.run(EurekaserverApplication.class, args);
    }

}

说明：

比springboot项目多了一个标签：@EnableEurekaServer，该标签用于标注是注册中心。

2.5 application.yml文件

spring:
  application:
    name: registry

server:
  port: 8761
eureka:
  client:
    register-with-eureka: false
    service-url:
      defaultZone: http://localhost:8761/eureka/

说明：

（1）name为项目名称；

（2）port: 8761为启动端口。

（3）eureka下面的配置暂时不用，后续用于在高可用配置的时候，作为客户端注册到另一台注册中心，实现高可用。

2.6 启动应用

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