【前面的话】SpringCloud为开发人员提供了快速构建分布式系统的一些工具,包括配置管理、服务发现、断路器、路由、微代理、事件总线、全局锁、决策竞选、分布式会话等等。它配置简单,上手快,而且生态成熟,便于应用。但是它对SpringBoot有很强的依赖,需要有一定基础,但是SpringBoot俩小时就可以入门。另外对于“微服务架构” 不了解的话,可以通过搜索引擎搜索“微服务架构”了解下。另外这是SpringCloud的版本为Greenwich.SR2,JDK版本为1.8,SpringBoot的版本为2.1.7.RELEASE。
壹、新建父工程
- 新建一个Maven父工程lovincloud,便于版本管理,然后删除src文件夹
- 添加pom依赖和SpringCloud和SpringBoot的版本
- ~~~pom
- org.springframework.boot
- spring-boot-starter-parent
- 2.1.7.RELEASE
<groupId>com.eelve.lovincloud</groupId> <artifactId>lovincloud</artifactId> <version>1.0-SNAPSHOT</version> <packaging>pom</packaging> <name>lovincloud</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <spring-cloud.version>Greenwich.SR2</spring-cloud.version> <java.version>1.8</java.version> </properties> <dependencies> <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>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> ~~~ # 贰、添加一个注册中心 在这里,我们需要用的的组件上Spring Cloud Netflix的Eureka ,eureka是一个服务注册和发现模块。 - 新建一个子工程**lovin-eureka-server**作为服务的注册中心 ~~~pom <parent> <artifactId>lovincloud</artifactId> <groupId>com.eelve.lovincloud</groupId> <version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>lovin-eureka-server</artifactId> <packaging>jar</packaging> <name>eurekaserver</name> <version>0.0.1</version> <description>eureka服务端</description> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${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> ~~~ - 然后在启动类上添加@EnableEurekaServer注解: ~~~java package com.eelve.lovin;
import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
/**
- @ClassName LovinEurekaServerApplication
- @Description TDO
- @Author zhao.zhilue
- @Date 2019/8/15 16:20
- @Version 1.0
- **/
- @EnableEurekaServer
- @SpringBootApplication
- public class LovinEurekaServerApplication {
- public static void main(String[] args) {
- SpringApplication.run(LovinEurekaServerApplication.class,args);
- }
- }
- ~~~
- eureka是一个高可用的组件,它没有后端缓存,每一个实例注册之后需要向注册中心发送心跳(因此可以在内存中完成),在默认情况下erureka server也是一个eureka client ,必须要指定一个 server。eureka server的配置文件appication.yml:
- ~~~yaml
- spring:
- application:
- naem: lovineurkaserver # 服务模块名称
- server:
- port: 8881 # 设置的eureka端口号
- eureka:
- instance:
- hostname: localhost # 设置eureka的主机地址
- client:
- registerWithEureka: false #表示是否将自己注册到Eureka Server,默认为true。由于当前应用就是Eureka Server,故而设置为false
- fetchRegistry: false #表示是否从Eureka Server获取注册信息,默认为true。因为这是一个单点的Eureka Server,不需要同步其他的Eureka Server节点的数据,故而设置为false
- serviceUrl:
- defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/ #Eureka server地址,查询服务和注册服务都需要依赖这个地址,多个地址可用逗号(英文的)分割
- ~~~
叁、添加一个服务消费端
- 新建一个子工程lovin-eureka-server作为服务的注册中心
- ~~~pom
- lovincloud
- com.eelve.lovincloud
- 1.0-SNAPSHOT
- 4.0.0
<artifactId>lovin-eureka-client</artifactId> <packaging>jar</packaging> <name>eurekaclient</name> <version>0.0.1</version> <description>eureka的一个消费端</description> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> ~~~ - 然后在启动类上添加@EnableEurekaClient注解: ~~~java package com.eelve.lovin;
import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
/**
- @ClassName LovinEurekaClientApplication
- @Description TDO
- @Author zhao.zhilue
- @Date 2019/8/15 16:37
- @Version 1.0
- **/
- @SpringBootApplication
- @EnableEurekaClient
- public class LovinEurekaClientApplication {
- public static void main(String[] args) {
- SpringApplication.run(LovinEurekaClientApplication.class,args);
- }
- }
- ~~~
- 然后我们需要连接到服务端,具体配置如下
- ~~~yaml
- server:
- port: 8801 # 服务端口号
- spring:
- application:
- name: lovineurkaclient # 服务名称
- eureka:
- client:
- serviceUrl:
- defaultZone: http://localhost:8881/eureka/ # 注册到的eureka服务地址
- ~~~
- 新建一个Controller写一个测试接口
- ~~~java
- package com.eelve.lovin.controller;
import com.eelve.lovin.config.ServerConfig;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;
/**
- @ClassName HelloController
- @Description TDO应用默认访问接口
- @Author zhao.zhilue
- @Date 2019/8/15 16:45
- @Version 1.0
- **/
- @RestController
- public class HelloController {
@Autowired ServerConfig serverConfig; @RequestMapping("hello") public String hello(){ return serverConfig.getUrl()+"###"+ HelloController.class.getName(); } } ~~~ # 肆、分别启动注册中心的服务端和客户端 访问localhost:8881查看结果  到这里我们可以已经看到已经成功将客户端注册到服务端了,然后我们访问测试接口  可以看到已经访问成功,至此Eureka的搭建已经完成。 # 伍、加入安全配置 在互联网中我们一般都会考虑安全性,尤其是管理服务的注册中心,所以我们可以用**spring-boot-starter-security**来做安全限制 - 给**lovin-eureka-server**添加**spring-boot-starter-security**的pom依赖 ~~~pom <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-security</artifactId> </dependency> ~~~ - 修改配置文件 ~~~yaml spring: application: naem: lovineurkaserver # 服务模块名称 security: basic: enabled: true user: name: lovin password: ${REGISTRY_SERVER_PASSWORD:lovin} server: port: 8881 # 设置的eureka端口号 eureka: instance: hostname: localhost # 设置eureka的主机地址 metadata-map: user.name: ${security.user.name} user.password: ${security.user.password} client: registerWithEureka: false #表示是否将自己注册到Eureka Server,默认为true。由于当前应用就是Eureka Server,故而设置为false fetchRegistry: false #表示是否从Eureka Server获取注册信息,默认为true。因为这是一个单点的Eureka Server,不需要同步其他的Eureka Server节点的数据,故而设置为false serviceUrl: defaultZone: http://${spring.security.user.name}:${spring.security.user.password}@${eureka.instance.hostname}:${server.port}/eureka/ #Eureka server地址,查询服务和注册服务都需要依赖这个地址,多个地址可用逗号(英文的)分割 ~~~ - 添加security配置 ~~~java package com.eelve.lovin.config;
import org.springframework.context.annotation.Configuration;import org.springframework.security.config.annotation.web.builders.HttpSecurity;import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
/**
- @ClassName SecurityConfig
- @Description TDO
- @Author zhao.zhilue
- @Date 2019/8/16 14:13
- @Version 1.0
- **/
- @EnableWebSecurity
- public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
@Override protected void configure(HttpSecurity http) throws Exception { http.csrf().disable(); http.authorizeRequests() .antMatchers("/css/**").permitAll() .anyRequest().authenticated() .and() .formLogin() .and() .httpBasic(); super.configure(http); } } ~~~ - 给**lovin-eureka-client**添加**spring-boot-starter-security**的pom依赖 ~~~pom <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-security</artifactId> </dependency> ~~~ - 修改yaml配置文件 ~~~yaml server: port: 8801 # 服务端口号 spring: application: name: lovineurkaclient # 服务名称 security: basic: enabled: true user: name: lovin password: ${REGISTRY_SERVER_PASSWORD:lovin} eureka: client: serviceUrl: defaultZone: http://lovin:lovin@localhost:8881/eureka/ # 注册到的eureka服务地址 instance: leaseRenewalIntervalInSeconds: 10 health-check-url-path: /actuator/health metadata-map: user.name: lovin user.password: lovin ~~~ - 添加security配置 ~~~java package com.eelve.lovin.config;
import org.springframework.context.annotation.Configuration;import org.springframework.security.config.annotation.web.builders.HttpSecurity;import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
/**
- @ClassName SecurityConfig
- @Description TDO
- @Author zhao.zhilue
- @Date 2019/8/16 14:13
- @Version 1.0
- **/
- @Configuration
- public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
@Override protected void configure(HttpSecurity http) throws Exception { http.authorizeRequests().anyRequest().permitAll() .and().csrf().disable(); } } ~~~ - 另外为了测试多客服端注册,我们可以修改再给客户端新建一个配置文件,然后开启IDEA的多节点运行,如下图所示勾选**Allow parallel run**  - 然后为了区分是哪个节点的请求我们可以添加获取端口 ~~~java package com.eelve.lovin.config;
import org.springframework.boot.web.context.WebServerInitializedEvent;import org.springframework.context.ApplicationListener;import org.springframework.stereotype.Component;
import java.net.InetAddress;import java.net.UnknownHostException;
/**
- @ClassName ServerConfig
- @Description TDO
- @Author zhao.zhilue
- @Date 2019/8/18 12:03
- @Version 1.0
- **/
- @Component
- public class ServerConfig implements ApplicationListener {
- private int serverPort;
public String getUrl() { InetAddress address = null; try { address = InetAddress.getLocalHost(); } catch (UnknownHostException e) { e.printStackTrace(); } return "http://"+address.getHostAddress() +":"+this.serverPort; } @Override public void onApplicationEvent(WebServerInitializedEvent event) { this.serverPort = event.getWebServer().getPort(); }
}~~~
- 然后我们一次重启服务端和两个客户端,这个时候我们访问http://localhost:8881/
- 可以看到,这里已经让我们输入用户名和密码了,说明spring-boot-starter-security已经配置成功,这时我们输入配置的用户名:lovin和密码:lovin
- 这里我们可以看到已经成功了,那么到这里Eureka的配置已经全部成功了。
- https://github.com/lovinstudio/lovincloud