Spring Cloud 学习笔记（一）-Eureka Server、Eureka Client

  • Spring Cloud 学习笔记（一）

** 搭建过程

搭建maven父子工程->包括父工程、eureka-server、eureka-client

https://www.cnblogs.com/shijunyu/p/9634845.html

  1. 创建maven父工程，pom文件如下：

    <?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>
	<groupId>com.wat</groupId>
	<artifactId>wat-spring-cloud-study</artifactId>
	<version>${project.version}</version>
	<name>wat-spring-cloud-study</name>
	<packaging>pom</packaging>

	<!-- spring cloud parent project -->
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.3.RELEASE</version>
		<!-- <relativePath /> --> <!-- used to download every time -->
	</parent>

	<!-- several modules -->
	<modules>
		<module>wat-spring-eureka-server</module>
		<module>wat-spring-eureka-client</module>
	</modules>

	<!-- properties used for clean -->
	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<java.version>1.8</java.version>
		<project.version>0.0.1-SNAPSHOT</project.version>
	</properties>

	<!-- like spring cloud properties without this will get error -->
	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>Finchley.RELEASE</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>

			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<configuration>
					<source>${java.version}</source>
					<target>${java.version}</target>
					<encoding>${project.build.sourceEncoding}</encoding>
				</configuration>
			</plugin>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-surefire-plugin</artifactId>
				<configuration>
					<useSystemClassLoader>false</useSystemClassLoader>
					<skip>true</skip>
				</configuration>
			</plugin>
		</plugins>
	</build>

	<repositories>
		<repository>
			<id>spring-milestones</id>
			<name>Spring Milestones</name>
			<url>https://repo.spring.io/libs-milestone</url>
			<snapshots>
				<enabled>false</enabled>
			</snapshots>
		</repository>
	</repositories>

</project>

  2. 创建maven子工程->eureka-server

    <?xml version="1.0"?>
<project
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
	xmlns="http://maven.apache.org/POM/4.0.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>com.wat</groupId>
		<artifactId>wat-spring-cloud-study</artifactId>
		<version>${project.version}</version>
	</parent>
	<artifactId>wat-spring-eureka-server</artifactId>
	<name>wat-spring-eureka-server</name>
	<url>http://maven.apache.org</url>

	<dependencies>

		<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>

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

	</dependencies>

</project>

  3. 创建maven子工程->eureka-client

    <?xml version="1.0"?>
<project
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
	xmlns="http://maven.apache.org/POM/4.0.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>com.wat</groupId>
		<artifactId>wat-spring-cloud-study</artifactId>
		<version>${project.version}</version>
	</parent>
	<artifactId>wat-spring-eureka-client</artifactId>
	<name>wat-spring-eureka-client</name>
	<url>http://maven.apache.org</url>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	</properties>

	<dependencies>

		<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>

</project>

  4. eureka-server写代码：

    package org.wat.spring.eureka.server;

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

/**
* Hello world!
*
*/
@EnableEurekaServer
@SpringBootApplication
public class App {

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

  5. 在eureka-server添加配置文件/src/main/resources/application.properties：

    server.port=8761

eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false

logging.level.com.netflix.eureka=OFF
logging.level.com.netflix.discovery=OFF

  6. 在eureka-client中写代码：

    package org.wat.spring.eureka.client;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@EnableDiscoveryClient
@SpringBootApplication
public class App {

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

@RestController
class ServiceInstanceRestController {

	@Autowired
	private DiscoveryClient discoveryClient;

	@RequestMapping("/service-instances/{applicationName}")
	public List<ServiceInstance> serviceInstancesByApplicationName(@PathVariable String applicationName) {
		return this.discoveryClient.getInstances(applicationName);
	}
}

  7. 在eureka-client添加配置文件/src/main/resources/bootstrap.properties：

        spring.application.name=wat-eureka-client-1

  8. 先启动程序eureka-server，并登陆http://localhost:8761看到instance里面没有程序：
    https://www.cnblogs.com/shijunyu/p/9634845.html

  9. 启动程序eureka-client，看到instance里面多了一个程序：
    https://www.cnblogs.com/shijunyu/p/9634845.html

到此第一篇入门就记录完毕啦、希望能每天成长一点，下一章学习：spring cloud config server
转载请注明出处：https://www.cnblogs.com/shijunyu/p/9634845.html

posted @ 2018-09-13 10:00  A_Little_Dream  阅读(184)  评论(0)  编辑  收藏  举报