spring cloud gateway简单构件

gateway网关用来分配路由，实现负载均衡

启动gateway

创建一个简单的springboot2.x项目，这里不做介绍

gateway 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>

    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <spring-cloud.version>Finchley.RELEASE</spring-cloud.version>
    </properties>

    <dependencies>

        <!--  gateway  -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-webflux</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
        </dependency>

        <!--  集成eureka  -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

        <!--  spring boot test  -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>


        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.31</version>
        </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>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <configuration>
                    <skipTests>true</skipTests>
                </configuration>
            </plugin>
        </plugins>
    </build>

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


</project>

使用eureka注册中心，和几个简单的服务，这里不再赘述。自己照着博客搭一个就可以，大概就是一个

eureka-server server-hi server-gateway 三个即可

启动eureka-server 端口号为 8761  如果没有可以借用http://eureka.didispace.com/这个的eureka

server-hi可以没有

在gateway的aplication.yml文件中

spring:
  application:
    name: service-gateway
  cloud:        # spring cloud gateway 路由配置方式
    gateway:
      discovery:      #是否与服务发现组件进行结合，通过 serviceId(必须设置成大写) 转发到具体的服务实例。默认为false，设为true便开启通过服务中心的自动根据 serviceId 创建路由的功能。
        locator:      #路由访问方式：http://Gateway_HOST:Gateway_PORT/大写的serviceId/**，其中微服务应用名默认大写访问。
          enabled: true
      routes:
      - id: SERVICE-HI                     #网关路由到eureka
        uri: lb://SERVICE-HI               # http也可以   LoadBalancerClient过滤器  这里写啥就会跳到啥页面
        predicates:
          - Path=/SERVICE-HI/**            #路径   websocket长连接可以在lb后使用ws  lb: ws://serviceid
      #          - Weight=provide, 90             # 权重 可以不加
        filter:
          - RedirectTo=404, http://zhihu.com
      - id: baidu                     #网关路由到eureka
        uri: http:www.baidu.com           # http也可以   LoadBalancerClient过滤器
        predicates:
          - Path=/baidu/**            #路径   websocket长连接可以在lb后使用ws  lb: ws://serviceid
      #          - Weight=provide, 90             # 权重 可以不加
#      - id: baidu
#        uri: http://baidu.com              # lb 不可以
#        method: GET                        # 请求方法
#        predicates:
#           - Path=/*
#        filter:
#        - RedirectTo=302, http://zhihu.com


logging:
  level:
    org.springframework.cloud.gateway: trace
    org.springframework.http.server.reactive: debug
    org.springframework.web.reactive: debug
    reactor.ipc.netty: debug


eureka:
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka/
    register-with-eureka: true
    fetch-registry: true

feign:
  hystrix:
    enabled: true
  okhttp:
    enabled: true #开启OKHTTP支持，依赖 （feign-okhttp）默认HttpClient
server:
  port: 8801
management:
  endpoints:
    web:
      exposure:
        include: "*"

现在启动就可以了，访问localhost:8801/baidu 路由就会跳到百度了，但是 path里的baidu这个会跟在www.baidu.com后面影响我们使用这是使用 filters: - StripPrefix=1 截取掉path里的第一个单词，这样我们就能够跳转至百度的首页了。这里就实现了一个简单的gateway

附上github地址可以down下来跑

https://github.com/p555iii/springCloudStudy

spring cloud gateway简单构件

猜你喜欢