SpringCloud初體驗：四、API GateWay 服務網關

網關服務很多，比如：Zuul、Kong、spring cloud gateway ……， 這里不糾結哪種性能好，本次體驗是用的 spring cloud gateway

更多網關比較可以了解這篇文章： 微服務網關哪家強？一文看懂Zuul, Nginx, Spring Cloud, Linkerd性能差異

 

配置網關服務步驟：

1、初始化一個 SpringBoot 應用

2、引入相關依賴

 

<?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.zjj7</groupId>
    <artifactId>gateway_server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

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

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.4.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>
    </properties>

    <!--配置倉庫-->
    <repositories>
        <repository>
            <id>aliRepository</id>
            <name>aliRepository</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>

    <!--cloud 引來-->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Finchley.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <!--<dependency>-->
            <!--<groupId>org.springframework.boot</groupId>-->
            <!--<artifactId>spring-boot-starter-web</artifactId>-->
        <!--</dependency>-->

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

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

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>


</project>

 

 

3、修改配置文件

 

spring:
  application:
    name: gateway_server
  cloud:
    gateway:
      default-filters:
      routes:
      - id:  user-server
        # lb代表從注冊中心獲取服務
        uri: lb://user
        predicates:
        # 轉發該路徑
        - Path=/user/**
        # 帶前綴
        filters:
        - StripPrefix=1
      - id:  publish-server
        uri: lb://publish
        predicates:
        - Path=/publish/**
        filters:
        - StripPrefix=1

#服務注冊中心端口號
server:
  port: 6400

#服務注冊中心實例的主機名、端口
#是否向服務注冊中心注冊自己
#是否檢索服務
#服務注冊中心的配置內容，指定服務注冊中心的位置
eureka:
  port:
    6110
  instance:
    hostname: localhost
  client:
    register-with-eureka: true
    fetch-registry: true
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:${eureka.port}/eureka/

 

 

 

 

這里和其它服務不同的是： 啟動類上面除了默認注解，無需添加更多

 

這時，一個簡單的網關服務就搭建完了, 啟動后所有的 API 就能以網關服務的地址為入口開始訪問了