您的位置: 首页  >  文章  >  SpringCloud Eureka注册服务与发现(一)

SpringCloud Eureka注册服务与发现(一)

分类: 文章 • 2024-04-13 15:31:09

SpringCloud简介

SpringCloud是基于SpringBoot基础之上开发的微服务框架，SpringCloud是一套目前非常完整的微服务解决方案框架，其内容包含服务治理、注册中心、配置管理、断路器、智能路由、微代理、控制总线、全局锁、分布式会话等。

springcloud核心组件：
  1. Eureka:服务治理 注册中心
  2. Hystrix:服务保护框架
  3. Ribbon:客户端负载均衡器
  4. Feign：基于ribbon和hystrix的声明式服务调用组件
  5. Zuul: 网关组件,提供智能路由、访问过滤等功能
相关组件架构图

SpringCloud Eureka注册服务与发现(一)

Eureka服务注册中心

Eureka原理图

SpringCloud Eureka注册服务与发现(一)

创建服务注册中心
  1. 创建Maven主工程(省略自己创建)
  2. 创建子模块eureka-server服务注册中心
<!-- eureka-server依赖 -->
<?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>com.springcloud</groupId>
        <artifactId>SpringCloud-Eureka</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <groupId>com.springcloud</groupId>
    <artifactId>eureka-server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>eureka-server</name>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <!-- 管理依赖 -->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Finchley.M7</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <!--Eureka-Server-->
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
    <!-- 解决依赖问题 -->
    <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>


#eureka-server相关配置
#注册地址端口号
server:
  port: 9000
eureka:
#注册到注册中心地址
  instance:
    hostname: locahost
  client:
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
    #是否注册到注册中心（注意：如果是集群为true）
    register-with-eureka: false
    #是否需要检索（注意：如果是集群为true）
    fetch-registry: false

Eureka-Server启动类

@SpringBootApplication
//@EnableEurekaServer开启eureka-server服务
@EnableEurekaServer
public class EurekaServerApplication {
	public static void main(String[] args) {
		SpringApplication.run(EurekaServerApplication.class, args);
	}
}

启动eureka-server项目、访问http://localhost:9000
SpringCloud Eureka注册服务与发现(一)

  1. 创建子模块eureka-client服务提供者
 
<?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>com.springcloud</groupId>
		<artifactId>SpringCloud-Eureka</artifactId>
		<version>1.0-SNAPSHOT</version>
	</parent>
	<groupId>com.springcloud</groupId>
	<artifactId>eureka-client-provide</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>eureka-client-provide</name>
	<properties>
		<java.version>1.8</java.version>
		<mybatis-spring-boot.version>2.0.0</mybatis-spring-boot.version>
		<druid.version>1.1.3</druid.version>
		<mybatis-plus.version>3.0.1</mybatis-plus.version>
	</properties>
	<!-- 管理依赖 -->
	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>Finchley.M7</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>
	<dependencies>
		<!-- SpringBoot整合eureka客户端 -->
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>8.0.11</version>
		</dependency>
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid</artifactId>
			<version>${druid.version}</version>
		</dependency>
		<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>${mybatis-spring-boot.version}</version>
		</dependency>
		<dependency>
			<groupId>com.baomidou</groupId>
			<artifactId>mybatis-plus</artifactId>
			<version>${mybatis-plus.version}</version>
		</dependency>
	</dependencies>
	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
		<resources>
			<resource>
				<directory>src/main/resources</directory>
				<filtering>true</filtering>
			</resource>
			<resource>
				<directory>src/main/java</directory>
				<includes>
					<include>**/*.xml</include>
				</includes>
			</resource>
		</resources>
	</build>
	<!-- 注意： 这里必须要添加， 否者各种依赖有问题 -->
	<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>

#eureka-client服务提供相关配置
server:
  port: 8002
spring:
    datasource:
        url: jdbc:mysql://localhost:3306/springcloud?tinyInt1isBit=false&characterEncoding=UTF-8&useSSL=true&allowMultiQueries=true&serverTimezone=UTC
        username: root
        password:
        driver-class-name: com.mysql.cj.jdbc.Driver
        type: com.alibaba.druid.pool.DruidDataSource
        filters: stat,wall,log4j
        maxActive: 20
        initialSize: 1
        maxWait: 60000
        minIdle: 1
        timeBetweenEvictionRunsMillis: 60000
        minEvictableIdleTimeMillis: 300000
        validationQuery: select 'x'
        testWhileIdle: true
        testOnBorrow: false
        testOnReturn: false
        poolPreparedStatements: true
        maxOpenPreparedStatements: 20
        connection-properties: druid.stat.merggSql=ture;druid.stat.slowSqlMillis=5000
    application:
        name: eurake-client-provide
eureka:
  client:
    service-url:
           defaultZone: http://localhost:9000/eureka
    register-with-eureka: true
    fetch-registry: true

Eureka-Client服务提供者启动类

@SpringBootApplication
@EnableEurekaClient
@MapperScan("com.springcloud.eurekaclientprovide.mapper")
public class EurekaClientProvideApplication {
	public static void main(String[] args) {
		SpringApplication.run(EurekaClientProvideApplication.class, args);
	}
}

启动eureka-client服务提供者
SpringCloud Eureka注册服务与发现(一)
SpringCloud Eureka注册服务与发现(一)
rureka-server自我保护机制开启了、可以不用处理

  1. 创建子模块eureka-client服务消费者
<!--eureka-client服务消费者依赖-->
<?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>com.springcloud</groupId>
		<artifactId>SpringCloud-Eureka</artifactId>
		<version>1.0-SNAPSHOT</version>
	</parent>
	<groupId>com.springcloud</groupId>
	<artifactId>eureka-client-consume</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>eureka-client-consume</name>
	<properties>
		<java.version>1.8</java.version>
	</properties>
	<!-- 管理依赖 -->
	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>Finchley.M7</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>
	<dependencies>
		<!-- SpringBoot整合eureka客户端 -->
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
		</dependency>
	</dependencies>
	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
		<resources>
			<resource>
				<directory>src/main/resources</directory>
				<filtering>true</filtering>
			</resource>
			<resource>
				<directory>src/main/java</directory>
				<includes>
					<include>**/*.xml</include>
				</includes>
			</resource>
		</resources>
	</build>
	<!-- 注意： 这里必须要添加， 否者各种依赖有问题 -->
	<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>

#eureka-client服务提供者相关配置
server:
  port: 8001
spring:
    application:
        name: eurake-client-consume
eureka:
  client:
    service-url:
           defaultZone: http://localhost:9000/eureka
    register-with-eureka: true
    fetch-registry: true

//eureka-client服务消费者启动类
@SpringBootApplication
@EnableEurekaClient
public class EurekaClientConsumeApplication {
	//这里使用RestTemplate 进行服务消费调用
	private RestTemplate restTemplate;
	public static void main(String[] args) {
		SpringApplication.run(EurekaClientConsumeApplication.class, args);
	}
	//@LoadBalanced让RestTemplate在请求时拥有客户端负载均衡的能力
	@Bean
	@LoadBalanced
	public RestTemplate restTemplate(){
		return new RestTemplate();
	}
}

启动eureka-client服务消费者
SpringCloud Eureka注册服务与发现(一)
项目搭建展示
SpringCloud Eureka注册服务与发现(一)

简单实现服务消费实例

服务消费代码

@RestController
@RequestMapping("/consume")
public class UserController {

    @Autowired
    private RestTemplate restTemplate;
	//读取配置文件(服务提供调用地址)
    @Value("${user.grtUserPath}")
    private String getByUserUrl;

    @GetMapping("/getById")
    public String getClientUser(@RequestParam Long id){
        Map<String,Object> map = new HashMap<>();
        map.put("id",id);
        String user = restTemplate.getForObject(this.getByUserUrl+"?id={id}", String.class,map);
        return user;
    }
}

服务提供者代码

@RestController
@RequestMapping("/provide")
public class ClientUserController {
    @Autowired
    private UserService userService;

    @GetMapping("/getById")
    public String getById(@RequestParam Long id){
        return userService.getById(id).toString();
    }
}

启动所有服务、访问http://localhost:8001/consume/getById?id=1SpringCloud Eureka注册服务与发现(一)

本人也是最近才学习、如有错误请指出、Thanks♪(･ω･)ﾉ

相关推荐