【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
<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.7.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <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>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build>
贰、添加一个注册中心
在这里,我们需要用的的组件上Spring Cloud Netflix的Eureka ,eureka是一个服务注册和发现模块。
-
新建一个子工程lovin-eureka-server作为服务的注册中心
<parent> <artifactId>lovincloud</artifactId> <groupId>com.eelve.lovincloud</groupId> <version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>lovin-eureka-server</artifactId> <packaging>jar</packaging> <name>eurekaserver</name> <version>0.0.1</version> <description>eureka服务端</description> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${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:
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
br/>**/
@EnableEurekaServer
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
<parent> <artifactId>lovincloud</artifactId> <groupId>com.eelve.lovincloud</groupId> <version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion> <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:
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
br/>**/
@SpringBootApplication
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
package com.eelve.lovin.controller;
- 新建一个Controller写一个测试接口
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
br/>**/
@RestController@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 ![注册中心](https://cache.yisu.com/upload/information/20200312/76/254765.jpg) 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 ![192202](https://cache.yisu.com/upload/information/20200312/76/254766.jpg) 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
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
package com.eelve.lovin.config;
- 修改配置文件
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
br/>**/
@EnableWebSecurity@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
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
package com.eelve.lovin.config;
- 修改yaml配置文件
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
br/>**/
@Configuration@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** ![192203](https://cache.yisu.com/upload/information/20200312/76/254767.jpg) - 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
br/>**/
@Component
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/
![192205](https://cache.yisu.com/upload/information/20200312/76/254769.jpg)
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
![192204](https://cache.yisu.com/upload/information/20200312/76/254772.jpg)
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。
* [最后的最后是本博客的源码,欢迎关注这一套SpringCloud的实践](https://github.com/lovinstudio/lovincloud)
原创文章,作者:kepupublish,如若转载,请注明出处:https://blog.ytso.com/190633.html