Spring cloud

本文围绕Spring Cloud微服务技术栈展开,介绍了其部署相关内容。包含统一的依赖管理,服务注册与发现的Eureka,涉及服务提供者与消费者的配置,如config配置中心、zipkin链路追踪等。还提及路由网关zuul及相关回调、过滤,最后说明了启动顺序和项目源码情况。

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微服务技术栈

微服务条目落地技术备注
服务开发Spring Boot、Spring、Spring MVC
服务配置与管理Netfix公司的Archaius、阿里的Diamond等
服务注册与发现Eureka、Consule、Zookeeper
服务调用Rest、RPC
服务熔断Hystrix等
负载均衡Ribbon、Nignx等
服务接口调用Feign等
服务配置中心管理SpringCloud Config、Chef等
服务路由(网关)Zuul等
服务监控Zabbix、Spectaor等
全链路追踪Zipkin,Brave、Dapper等
服务部署Docker、OpenStack等
数据流操作开发部SpringCloud Stream
事件消息总线Spring Cloud Bus

Spring cloud部署

统一的依赖管理dependencies

创建springcloud-dependencies项目,pom.xml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>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.5.RELEASE</version>
    </parent>

    <groupId>com.shyb</groupId>
    <artifactId>springcloud-dependencies</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <packaging>pom</packaging>

    <properties>
        <!-- Environment Settings -->
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

        <!-- Spring Settings -->
        <spring-cloud.version>Greenwich.SR1</spring-cloud.version>
        <zipkin.version>2.10.1</zipkin.version>
        <spring.boot.admin.version>2.1.5</spring.boot.admin.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!-- zipkin链路追踪 begin-->
            <dependency>
                <groupId>io.zipkin.java</groupId>
                <artifactId>zipkin</artifactId>
                <version>${zipkin.version}</version>
            </dependency>
            <dependency>
                <groupId>io.zipkin.java</groupId>
                <artifactId>zipkin-server</artifactId>
                <exclusions>
                    <exclusion>
                        <groupId>org.springframework.boot</groupId>
                        <artifactId>spring-boot-starter-log4j2</artifactId>
                    </exclusion>
                </exclusions>
                <version>${zipkin.version}</version>
            </dependency>
            <dependency>
                <groupId>io.zipkin.java</groupId>
                <artifactId>zipkin-autoconfigure-ui</artifactId>
                <version>${zipkin.version}</version>
            </dependency>
            <!-- zipkin链路追踪 end-->

            <!-- admin服务监控 begin-->
            <dependency>
                <groupId>de.codecentric</groupId>
                <artifactId>spring-boot-admin-starter-server</artifactId>
                <version>${spring.boot.admin.version}</version>
            </dependency>
            <!-- admin服务监控 begin-->
        </dependencies>
    </dependencyManagement>
    <dependencies>
        <!-- 所有子工程都需要的依赖 start -->
        <!-- eureka start-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zipkin</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
        <!-- eureka end-->
    </dependencies>
    <build>
        <plugins>
            <!-- Compiler 插件, 设定 JDK 版本 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <showWarnings>true</showWarnings>
                </configuration>
            </plugin>

            <!-- 打包 jar 文件时,配置 manifest 文件,加入 lib 包的 jar 依赖 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <configuration>
                    <archive>
                        <addMavenDescriptor>false</addMavenDescriptor>
                    </archive>
                </configuration>
                <executions>
                    <execution>
                        <configuration>
                            <archive>
                                <manifest>
                                    <!-- Add directory entries -->
                                    <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
                                    <addDefaultSpecificationEntries>true</addDefaultSpecificationEntries>
                                    <addClasspath>true</addClasspath>
                                </manifest>
                            </archive>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

            <!-- resource -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
            </plugin>

            <!-- install -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-install-plugin</artifactId>
            </plugin>

            <!-- clean -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-clean-plugin</artifactId>
            </plugin>

            <!-- ant -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-antrun-plugin</artifactId>
            </plugin>

            <!-- dependency -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
            </plugin>
        </plugins>

        <pluginManagement>
            <plugins>
                <!-- Java Document Generate -->
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-javadoc-plugin</artifactId>
                    <executions>
                        <execution>
                            <phase>prepare-package</phase>
                            <goals>
                                <goal>jar</goal>
                            </goals>
                        </execution>
                    </executions>
                </plugin>

                <!-- YUI Compressor (CSS/JS压缩) -->
                <plugin>
                    <groupId>net.alchim31.maven</groupId>
                    <artifactId>yuicompressor-maven-plugin</artifactId>
                    <version>1.5.1</version>
                    <executions>
                        <execution>
                            <phase>prepare-package</phase>
                            <goals>
                                <goal>compress</goal>
                            </goals>
                        </execution>
                    </executions>
                    <configuration>
                        <encoding>UTF-8</encoding>
                        <jswarn>false</jswarn>
                        <nosuffix>true</nosuffix>
                        <linebreakpos>30000</linebreakpos>
                        <force>true</force>
                        <includes>
                            <include>**/*.js</include>
                            <include>**/*.css</include>
                        </includes>
                        <excludes>
                            <exclude>**/*.min.js</exclude>
                            <exclude>**/*.min.css</exclude>
                        </excludes>
                    </configuration>
                </plugin>
            </plugins>
        </pluginManagement>

        <!-- 资源文件配置 -->
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <excludes>
                    <exclude>**/*.java</exclude>
                </excludes>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
            </resource>
        </resources>
    </build>

    <repositories>
        <repository>
            <id>aliyun-repos</id>
            <name>Aliyun Repository</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>

        <repository>
            <id>sonatype-repos</id>
            <name>Sonatype Repository</name>
            <url>https://oss.sonatype.org/content/groups/public</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>sonatype-repos-s</id>
            <name>Sonatype Repository</name>
            <url>https://oss.sonatype.org/content/repositories/snapshots</url>
            <releases>
                <enabled>false</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>

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

    <pluginRepositories>
        <pluginRepository>
            <id>aliyun-repos</id>
            <name>Aliyun Repository</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>
</project>

服务注册与发现Eureka

1. 创建springcloud-eureka项目,pom.xml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>

    <parent>
        <groupId>com.shyb</groupId>
        <artifactId>springcloud-dependencies</artifactId>
        <version>1.0.0-SNAPSHOT</version>
        <relativePath>../springcloud-dependencies/pom.xml</relativePath>
    </parent>

    <artifactId>springcloud-eureka</artifactId>
    <packaging>jar</packaging>
	<dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <mainClass>com.shyb.springcloud.eureka.EurekaApplication</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

2. 启动类开启eureka server注解
package com.shyb.springcloud.eureka;

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

/**
 * @author wzh
 * @date 2019/6/4 - 10:12
 */
@SpringBootApplication
@EnableEurekaServer
public class EurekaApplication {
    public static void main(String[] args) {
        SpringApplication.run(EurekaApplication.class,args);
    }
}

3. application.yml配置
spring:
  cloud:
    config:
      uri: localhost:8888
      name: eureka
      label: master
      profile: dev
服务提供者(注册)
config配置中心
1. springcloud-config项目pom.xml
<?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.shyb</groupId>
        <artifactId>springcloud-dependencies</artifactId>
        <version>1.0.0-SNAPSHOT</version>
        <relativePath>../springcloud-dependencies/pom.xml</relativePath>
    </parent>

    <artifactId>springcloud-config</artifactId>
    <packaging>jar</packaging>

    <dependencies>
        <!-- Spring Cloud Begin -->
        <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-config-server</artifactId>
    </dependency>
        <!-- Spring Cloud End -->
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <mainClass>com.shyb.springcloud.config.ConfigApplication</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

2. 启动类注册到eureka,开启config server
package com.shyb.springcloud.config;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.config.server.EnableConfigServer;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

/**
 * @author wzh
 * @date 2019/6/17 - 21:27
 */
@EnableConfigServer
@EnableEurekaClient
@SpringBootApplication
public class ConfigApplication {
    public static void main(String[] args) {
        SpringApplication.run(ConfigApplication.class,args);
    }
}

3. application.yml配置
注意事项: config配置中心的server.port在application.yml只能配8888,要换需要在bootstrap.yml配置(优先级高于application.yml)
spring:
  application:
    name: springcloud-config
  cloud:
    config:
      label: master
      server:
        git:
          uri: https://github.com/www5978058/springcloud-config.git
          search-paths: respo
          username: www5978058
          password: ********

server:
  port: 8888

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/

zipkin链路追踪
springcloud-zipkin的pom.xml
<?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.shyb</groupId>
        <artifactId>springcloud-dependencies</artifactId>
        <version>1.0.0-SNAPSHOT</version>
        <relativePath>../springcloud-dependencies/pom.xml</relativePath>
    </parent>

    <artifactId>springcloud-zipkin</artifactId>
    <packaging>jar</packaging>

    <dependencies>
        <!-- Spring Boot Begin -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- Spring Boot End -->

        <!-- Spring Cloud Begin -->
        <dependency>
            <groupId>io.zipkin.java</groupId>
            <artifactId>zipkin</artifactId>
        </dependency>
        <dependency>
            <groupId>io.zipkin.java</groupId>
            <artifactId>zipkin-server</artifactId>
        </dependency>
        <dependency>
            <groupId>io.zipkin.java</groupId>
            <artifactId>zipkin-autoconfigure-ui</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <!-- Spring Cloud End -->
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <mainClass>com.shyb.springcloud.zipkin.ZipKinApplication</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

yml配置
spring:
  cloud:
    config:
      uri: localhost:8888
      name: zipkin
      label: master
      profile: dev
启动类配置
package com.shyb.springcloud.zipkin;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import zipkin.server.internal.EnableZipkinServer;

/**
 * @author wzh
 * @date 2019/6/18 - 9:35
 */
@EnableZipkinServer
@EnableEurekaClient
@SpringBootApplication
public class    ZipKinApplication {
    public static void main(String[] args) {
        SpringApplication.run(ZipKinApplication.class,args);
    }
}

admin服务监控
springcloud-admin的pom.xml
<?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.shyb</groupId>
        <artifactId>springcloud-dependencies</artifactId>
        <version>1.0.0-SNAPSHOT</version>
        <relativePath>../springcloud-dependencies/pom.xml</relativePath>
    </parent>

    <artifactId>springcloud-admin</artifactId>
    <packaging>jar</packaging>

    <dependencies>
        <!-- Spring Boot Begin -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-webflux</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.jolokia</groupId>
            <artifactId>jolokia-core</artifactId>
        </dependency>
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-server</artifactId>
        </dependency>
        <!-- Spring Boot End -->

        <!-- Spring Cloud Begin -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zipkin</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <!-- Spring Cloud End -->
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <mainClass>com.shyb.springcloud.admin.AdminApplication</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

yml配置
spring:
  cloud:
    config:
      uri: localhost:8888
      name: admin
      label: master
      profile: dev
启动类注册进eureka,开启admin Server
package com.shyb.springcloud.admin;

import de.codecentric.boot.admin.server.config.EnableAdminServer;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

/**
 * @author wzh
 * @date 2019/6/18 - 11:13
 */
@EnableAdminServer
@EnableEurekaClient
@SpringBootApplication
public class AdminApplication {
    public static void main(String[] args) {
        SpringApplication.run(AdminApplication.class,args);
    }
}

业务提供
1. springcloud-service-admin项目下pom.xml
<?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.shyb</groupId>
        <artifactId>springcloud-dependencies</artifactId>
        <version>1.0.0-SNAPSHOT</version>
        <relativePath>../springcloud-dependencies/pom.xml</relativePath>
    </parent>

    <artifactId>springcloud-service-admin</artifactId>
    <packaging>jar</packaging>
	<dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zipkin</artifactId>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <mainClass>com.shyb.springcloud.service.admin.ServiceAdminApplication</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

2. 启动类配置服务 client
package com.shyb.springcloud.service.admin;

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

/**
 * @author wzh
 * @date 2019/6/4 - 10:32
 */
@EnableEurekaClient
@SpringBootApplication
public class ServiceAdminApplication {
    public static void main(String[] args) {
        SpringApplication.run(ServiceAdminApplication.class,args);
    }
}

3. application.yml配置
spring:
  application:
    name: springcloud-service-admin
  zipkin:
    base-url: http://localhost:9411
server:
  port: 8763

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
4. 配置业务逻辑,提供API接口
package com.shyb.springcloud.service.admin.controller;

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

/**
 * @author wzh
 * @date 2019/6/4 - 10:38
 */
@RestController
public class AdminController {
    @Value("${server.port}")
    private String port;

    @GetMapping("/")
    public String hello(){
        return "你的端口是"+port;
    }

    @GetMapping("/show")
    public String show(String message){
        return "你的消息是"+",端口是"+port;
    }
}

服务消费者(发现)
ribbon+hystrix
springcloud-web-admin-ribbon项目的pom.xml
<?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.shyb</groupId>
        <artifactId>springcloud-dependencies</artifactId>
        <version>1.0.0-SNAPSHOT</version>
        <relativePath>../springcloud-dependencies/pom.xml</relativePath>
    </parent>

    <artifactId>springcloud-web-admin-ribbon</artifactId>
    <packaging>jar</packaging>

    <dependencies>
        <!-- Spring Boot Begin -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- Spring Boot End -->

        <!-- Spring Cloud Begin -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zipkin</artifactId>
        </dependency>
        <!-- Spring Cloud End -->

        <!-- 解决 thymeleaf 模板引擎一定要执行严格的 html5 格式校验问题 -->
        <dependency>
            <groupId>net.sourceforge.nekohtml</groupId>
            <artifactId>nekohtml</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <mainClass>com.shyb.springcloud.web.admin.ribbon.WebAdminRibbonApplication</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>
启动类配置 增加服务发现和开启断路器
package com.shyb.springcloud.web.admin.ribbon;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.hystrix.EnableHystrix;

/**
 * @author wzh
 * @date 2019/6/4 - 10:49
 */
@SpringBootApplication
@EnableDiscoveryClient
@EnableHystrix
public class WebAdminRibbonApplication {
    public static void main(String[] args) {
        SpringApplication.run(WebAdminRibbonApplication.class,args);
    }
}

yml配置 
spring:
  cloud:
    config:
      uri: localhost:8888
      name: web-admin-ribbon
      label: master
      profile: dev
配置restTemplate
package com.shyb.springcloud.web.admin.ribbon.config;

import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

/**
 * @author wzh
 * @date 2019/6/4 - 10:58
 */
@Configuration
public class RestTemplateConfiguration {
    @Bean
    @LoadBalanced
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }
}

rest调用和断路调用
package com.shyb.springcloud.web.admin.ribbon.service;

import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;

/**
 * @author wzh
 * @date 2019/6/16 - 14:59
 */
@Service
public class AdminService {
    private static final String ADMIN_SERVER_URL = "http://SPRINGCLOUD-SERVICE-ADMIN/";
    @Autowired
    RestTemplate restTemplate;
    @HystrixCommand(fallbackMethod = "hiError")
    public String hello(){
        return restTemplate.getForObject(ADMIN_SERVER_URL,String.class);
    }
    @HystrixCommand(fallbackMethod = "showError")
    public String show(String message){
        return restTemplate.getForObject(ADMIN_SERVER_URL+"show?message="+message,String.class);
    }
    public String hiError(){
        return "your request bad";
    }

    public String showError(String message){
        return String.format("your message is %s, but your request bad",message);
    }
}

对外暴露接口
package com.shyb.springcloud.web.admin.ribbon.controller;

import com.shyb.springcloud.web.admin.ribbon.service.AdminService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author wzh
 * @date 2019/6/16 - 15:03
 */
@RestController
public class AdminController {
    @Autowired
    private AdminService adminService;

    @GetMapping("/")
    public String hello(){
        return adminService.hello();
    }

    @GetMapping("/show")
    public String show(String message){
        return adminService.show(message);
    }
}

feign(封装了ribbon 常用)+hystrix
建立springcloud-web-admin-feign项目,pom.xml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>

    <parent>
        <groupId>com.shyb</groupId>
        <artifactId>springcloud-dependencies</artifactId>
        <version>1.0.0-SNAPSHOT</version>
        <relativePath>../springcloud-dependencies/pom.xml</relativePath>
    </parent>

    <artifactId>springcloud-web-admin-feign</artifactId>
    <packaging>jar</packaging>

    <dependencies>
        <!-- Spring Boot Begin -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- Spring Boot End -->

        <!-- Spring Cloud Begin -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zipkin</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
        </dependency>
        <!-- Spring Cloud End -->

        <!-- 解决 thymeleaf 模板引擎一定要执行严格的 html5 格式校验问题 -->
        <dependency>
            <groupId>net.sourceforge.nekohtml</groupId>
            <artifactId>nekohtml</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <mainClass>com.shyb.springcloud.web.admin.feign.WebAdminFeignApplication</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>


application.yml配置(需要feign.hystrix.enabled=true开启断路)
spring:
  cloud:
    config:
      uri: localhost:8888
      name: web-admin-feign
      label: master
      profile: prod
启动类开启服务发现、断路器和Feign注解
package com.shyb.springcloud.web.admin.ribbon;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.hystrix.EnableHystrix;

/**
 * @author wzh
 * @date 2019/6/4 - 10:49
 */
@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
@EnableHystrixDashboard
public class WebAdminRibbonApplication {
    public static void main(String[] args) {
        SpringApplication.run(WebAdminRibbonApplication.class,args);
    }
}

建立业务接口,使用FeignClient注解,value指定spring.application.name,fallback指定
返回实现类,实现类的方法就是断路后的方法
package com.shyb.springcloud.web.admin.feign.service;

import com.shyb.springcloud.web.admin.feign.service.hystrix.AdminServiceHystrix;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;

/**
 * @author wzh
 * @date 2019/6/16 - 15:16
 */
@FeignClient(value = "SPRINGCLOUD-SERVICE-ADMIN",fallback = AdminServiceHystrix.class)
public interface AdminService {
    @GetMapping("/")
    public String sayHi();

    /**
     * 需要使用@RequestParam注解,该注解作为参数传递
     * @param message
     * @return
     */
    @GetMapping("/show")
    public String show(@RequestParam("message") String message);
}

package com.shyb.springcloud.web.admin.feign.service.hystrix;

import com.shyb.springcloud.web.admin.feign.service.AdminService;
import org.springframework.stereotype.Component;

/**
 * @author wzh
 * @date 2019/6/16 - 15:35
 */
@Component
public class AdminServiceHystrix implements AdminService {

    @Override
    public String sayHi() {
        return "your request is bad";
    }

    @Override
    public String show(String message) {
        return String.format("your message is %s,but it is bad",message);
    }
}

对外提供访问
package com.shyb.springcloud.web.admin.feign.controller;

import com.shyb.springcloud.web.admin.feign.service.AdminService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author wzh
 * @date 2019/6/16 - 15:17
 */
@RestController
public class AdminController {
    @Autowired
    AdminService adminService;
    @GetMapping("/")
    public String sayHi(){
        return adminService.sayHi();
    }
    @GetMapping("/show")
    public String show(String message){
        return adminService.show(message);
    }
}

配置断路监控HystrixMetricsStreamServlet
package com.shyb.springcloud.web.admin.feign.config;

import com.netflix.hystrix.contrib.metrics.eventstream.HystrixMetricsStreamServlet;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @author wzh
 * @date 2019/6/16 - 15:40
 */
@Configuration
public class HystrixDashboardConfiguration {
    @Bean
    public ServletRegistrationBean hystrixMetricsStreamServlet(){
        HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
        ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);
        registrationBean.setLoadOnStartup(1);
        registrationBean.addUrlMappings("/hystrix.stream");
        registrationBean.setName("HystrixMetricsStreamServlet");
        return registrationBean;
    }
}

在这里插入图片描述
在这里插入图片描述

路由网关(zuul)

springcloud-zuul的pom.xml配置如下
<?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>

    <parent>
        <groupId>com.shyb</groupId>
        <artifactId>springcloud-dependencies</artifactId>
        <version>1.0.0-SNAPSHOT</version>
        <relativePath>../springcloud-dependencies/pom.xml</relativePath>
    </parent>

    <artifactId>springcloud-zuul</artifactId>
    <packaging>jar</packaging>

    <dependencies>
        <!-- Spring Boot Begin -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- Spring Boot End -->

        <!-- Spring Cloud Begin -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-zuul</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <!-- Spring Cloud End -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <mainClass>com.shyb.springcloud.zuul.ZuulApplication</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

yml配置(zuul.routs配置map)
spring:
  cloud:
    config:
      uri: localhost:8080
      name: zuul
      label: master
      profile: dev

启动类配置,注册到eureka,开启zuul代理
package com.shyb.springcloud.zuul;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.zuul.EnableZuulProxy;

/**
 * @author wzh
 * @date 2019/6/16 - 16:00
 */
@SpringBootApplication
@EnableZuulProxy
@EnableEurekaClient
public class ZuulApplication {
    public static void main(String[] args) {
        SpringApplication.run(ZuulApplication.class,args);
    }
}

网关失败回调
package com.shyb.springcloud.zuul.provide;

import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.cloud.netflix.zuul.filters.route.FallbackProvider;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.stereotype.Component;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;

/**
 * @author wzh
 * @date 2019/6/16 - 16:22
 */
@Component
public class WebAdminFeignFallbackProvider implements FallbackProvider {
    @Override
    public String getRoute() {
        return "SPRINGCLOUD-WEB-ADMIN-FEIGN";
    }

    @Override
    public ClientHttpResponse fallbackResponse(String route, Throwable cause) {
        return new ClientHttpResponse() {
            /**
             * 网关向 api 服务请求失败了,但是消费者客户端向网关发起的请求是成功的,
             * 不应该把 api 的 404,500 等问题抛给客户端
             * 网关和 api 服务集群对于客户端来说是黑盒
             * @return
             * @throws IOException
             */
            @Override
            public HttpStatus getStatusCode() throws IOException {
                return HttpStatus.OK;
            }

            @Override
            public int getRawStatusCode() throws IOException {
                return HttpStatus.OK.value();
            }

            @Override
            public String getStatusText() throws IOException {
                return HttpStatus.OK.getReasonPhrase();
            }

            @Override
            public void close() {

            }

            @Override
            public InputStream getBody() throws IOException {
                ObjectMapper objectMapper = new ObjectMapper();
                Map<String, Object> map = new HashMap<>();
                map.put("status", 200);
                map.put("message", "无法连接,请检查您的网络");
                return new ByteArrayInputStream(objectMapper.writeValueAsString(map).getBytes("UTF-8"));
            }

            @Override
            public HttpHeaders getHeaders() {
                HttpHeaders headers = new HttpHeaders();
                // 和 getBody 中的内容编码一致
                headers.setContentType(MediaType.APPLICATION_JSON_UTF8);
                return headers;
            }
        };
    }
}

网关过滤器
package com.shyb.springcloud.zuul.filter;

import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.context.RequestContext;
import com.netflix.zuul.exception.ZuulException;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @author wzh
 * @date 2019/6/17 - 15:31
 */
@Component
@Slf4j
public class LoginFilter extends ZuulFilter {
    /**
     * 配置过滤类型,有四种不同生命周期的过滤器类型
     * 1. pre:路由之前
     * 2. routing:路由之时
     * 3. post:路由之后
     * 4. error:发送错误调用
     * @return
     */
    @Override
    public String filterType() {
        return "pre";
    }
    /**
     * 配置过滤的顺序
     * @return
     */
    @Override
    public int filterOrder() {
        return 0;
    }
    /**
     * 配置是否需要过滤:true/需要,false/不需要
     * @return
     */
    @Override
    public boolean shouldFilter() {
        return true;
    }
    /**
     * 过滤器的具体业务代码
     * @return
     * @throws ZuulException
     */
    @Override
    public Object run() throws ZuulException {
        RequestContext context = RequestContext.getCurrentContext();
        HttpServletRequest request = context.getRequest();
        log.info("{} >>> {}", request.getMethod(), request.getRequestURL().toString());
        String token = request.getParameter("token");
        if (token == null) {
            log.warn("Token is empty");
            context.setSendZuulResponse(false);
            context.setResponseStatusCode(401);
            try {
                HttpServletResponse httpServletResponse = context.getResponse();
                httpServletResponse.setContentType(MediaType.APPLICATION_JSON_UTF8_VALUE);
                httpServletResponse.getWriter().write("Token is empty啊啊啊");
            } catch (IOException e) {
            }
        } else {
            log.info("OK");
        }
        return null;
    }
}

启动顺序

先启动eureka,再启动config配置中心和zipKin链路追踪,再启动admin服务监控和业务
提供,再启动业务消费,最后开启zuul网关。

项目源码

config配置中心
springcloud源码目录

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