SpringCloud -- 基本配置

其他 2019-07-05 09:21:40 阅读次数: 0

转载地址： https://blog.csdn.net/forezp/article/details/70148833

1、搭建模块层次

<?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>

  <!-- 父级 pom 工程 -->
  <groupId>com.vim</groupId>
  <artifactId>cloud-parent</artifactId>
  <packaging>pom</packaging>
  <version>1.0-SNAPSHOT</version>
  <modules>
    <module>eureka-server</module>
  </modules>

  <!-- springboot 版本 -->
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.3.RELEASE</version>
    <relativePath/>
  </parent>

  <properties>
    <spring-cloud.version>Finchley.RELEASE</spring-cloud.version>
  </properties>

  <!-- springcloud 版本 -->
  <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>

  <!-- 使用阿里云仓库 -->
  <repositories>
    <repository>
      <id>nexus-aliyun</id>
      <name>Nexus aliyun</name>
      <url>http://maven.aliyun.com/nexus/content/groups/public</url>
    </repository>
  </repositories>

  <!-- 设置编译环境 -->
  <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>1.8</source>
          <target>1.8</target>
          <encoding>UTF-8</encoding>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

2、搭建 Eureka Server

  • 配置启动类，添加 @EnableEurekaServer 注解
spring.application.name=eureka-server
server.port=8888

eureka.instance.hostname=localhost
eureka.client.fetch-registry=false
eureka.client.register-with-eureka=false
eureka.client.service-url.defaultZone=http://${eureka.instance.hostname}:${server.port}/eureka/
<dependencies>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
    </dependency>
</dependencies>

 3、搭建 Eureka Client

  • 配置启动类，添加 @EnableEurekaClient 注解
spring.application.name=service-one
server.port=9001

eureka.client.service-url.defaultZone=http://localhost:8888/eureka/
<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>

4、开启 feign 和 hystrix

  • 配置启动类，添加 @EnableFeignClients 注解
feign.hystrix.enabled=true
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
  • 配置业务层熔断类
package com.vim.modules.web.service;

import org.springframework.stereotype.Component;

@Component
public class TestServiceHystrix implements TestService{

    @Override
    public String test() {
        return “”“”;
    }
}
  • 配置业务层 service
package com.vim.modules.web.service;

import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@FeignClient(value = "service-one", fallback = TestServiceHystrix.class)
public interface TestService {

    @RequestMapping(value = "/test",method = RequestMethod.GET)
    String test();
}
  • 配置控制层 controller
package com.vim.modules.web.controller;

import com.vim.modules.web.service.TestService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class TestController {

    @Autowired
    private TestService testService;

    @RequestMapping(value = "/test")
    public String test(){
        return testService.test();
    }
}

5、单个工程开启多个实例

  • Edit Configurations --> 去掉 Single instance only 勾选
  • 修改 application.properties 端口，再启动即可

6、搭建 Zuul 网关

  • 配置启动类，添加 @EnableZuulProxy 注解
zuul.routes.api-one.path=/api-one/**
zuul.routes.api-one.serviceId=service-one
zuul.routes.api-two.path=/api-two/**
zuul.routes.api-two.serviceId=service-two
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-zuul</artifactId>
</dependency>
  •  添加过滤器
package com.vim.common.filter;

import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.context.RequestContext;
import com.netflix.zuul.exception.ZuulException;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;

@Component
public class UserFilter extends ZuulFilter {

    @Override
    public String filterType() {
        //pre：路由之前
        //routing：路由之时
        //post：路由之后
        //error：错误之后
        return "pre";
    }

    @Override
    public int filterOrder() {
        return 0;
    }

    @Override
    public boolean shouldFilter() {
        return true;
    }

    @Override
    public Object run() throws ZuulException {
        RequestContext ctx = RequestContext.getCurrentContext();
        HttpServletRequest request = ctx.getRequest();
        return null;
    }
}

7、搭建 config 服务器

  • 配置启动类，添加 @EnableConfigServer注解
spring.cloud.config.server.git.uri=https://github.com/bbbscxy/boot-config
spring.cloud.config.server.git.searchPaths=config
spring.cloud.config.label=master
spring.cloud.config.server.git.username=
spring.cloud.config.server.git.password=
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-config-server</artifactId>
</dependency>
  •  配置文件
#配置文件位置
https://github.com/bbbscxy/boot-config/blob/master/config/client-dev.properties

#直接访问方式
http://localhost:9030/client-dev.properties
  • 文件名定义规则
项目名--环境.properties

 8、搭建 config 客户端

  • 配置依赖
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-config</artifactId>
</dependency>
  •  新建 bootstrap.properties
spring.application.name=service-one
server.port=9000

eureka.client.service-url.defaultZone=http://localhost:8888/eureka/

#此处可自定义，这样 spring.application.name 就可以取其他的名称
spring.cloud.config.name=client
spring.cloud.config.label=master
spring.cloud.config.profile=dev
spring.cloud.config.discovery.enabled=true
spring.cloud.config.discovery.serviceId=service-config
  •  控制器获取属性
package com.vim.modules.web.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class TestController {

    @Value("${param}")
    private String param;

    @RequestMapping(value = "/test")
    public String test(){
        return param;
    }
}

9、注册中心高可用

  • 新建三个文件，分别为 application-server2.properties、application-server3.properties、application-server4.properties
spring.application.name=eureka-server
server.port=8888

eureka.instance.hostname=localhost
eureka.client.fetch-registry=false
eureka.client.register-with-eureka=false
eureka.client.service-url.defaultZone=http://${eureka.instance.hostname}:8889/eureka/,http://${eureka.instance.hostname}:8890/eureka/
spring.application.name=eureka-server
server.port=8889

eureka.instance.hostname=localhost
eureka.client.fetch-registry=false
eureka.client.register-with-eureka=false
eureka.client.service-url.defaultZone=http://${eureka.instance.hostname}:8888/eureka/,http://${eureka.instance.hostname}:8890/eureka/
spring.application.name=eureka-server
server.port=8890

eureka.instance.hostname=localhost
eureka.client.fetch-registry=false
eureka.client.register-with-eureka=false
eureka.client.service-url.defaultZone=http://${eureka.instance.hostname}:8888/eureka/,http://${eureka.instance.hostname}:8889/eureka/
  • application.properties 文件，分别启动三个工程
spring.profiles.active=server2
  • 客户端修改 application.properties
eureka.client.service-url.defaultZone=http://localhost:8888/eureka/,http://localhost:8889/eureka/,http://localhost:8890/eureka/

10、搭建消息总线

  • 配置依赖
spring.rabbitmq.host=localhost
spring.rabbitmq.port=5672
spring.rabbitmq.username=guest
spring.rabbitmq.password=guest

spring.cloud.bus.enabled=true
spring.cloud.bus.trace.enabled=true
management.endpoints.web.exposure.include=bus-refresh
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-bus-amqp</artifactId>
</dependency>
  •  控制器修改
package com.vim.modules.web.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RefreshScope
public class TestController {

    @Value("${param}")
    private String param;

    @RequestMapping(value = "/test")
    public String test(){
        return param;
    }
}
  • 刷新配置，发送POST 请求
http://localhost:9000/actuator/bus-refresh

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