Getway实现nacos注册及服务转发

首先创建一个module——kiba-getway，如下图：

我们新建的项目缺少resources文件夹，打开project structure——moudules，右键java，创建文件夹，如下图：

然后选择resources，再点击【mark a directory as a resources root】，设置resource root，如下图：

然后修改pom里的组件版本，文件代码如下：

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.kibaframework</groupId>
    <artifactId>kiba-getway</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>kiba-getway</name>
    <description>kiba-getway</description>
    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> 
        <spring.boot.version>2.3.12.RELEASE</spring.boot.version>
        <spring.cloud.version>Hoxton.SR11</spring.cloud.version> 
        <spring.cloud.alibaba.version>2.2.10-RC1</spring.cloud.alibaba.version> 
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
        </dependency>
        <!-- Nacos -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>com.alibaba.nacos</groupId>
                    <artifactId>nacos-client</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>com.alibaba.nacos</groupId>
                    <artifactId>nacos-client</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>com.alibaba.nacos</groupId>
            <artifactId>nacos-client</artifactId>
        </dependency>



        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.20</version>
        </dependency>
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.8.16</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring.cloud.alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring.boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <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.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>${spring.boot.version}</version>
                <configuration>
                    <mainClass>com.example.kibagetway.KibaGetwayApplication</mainClass>
                    <skip>true</skip>
                </configuration>
                <executions>
                    <execution>
                        <id>repackage</id>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

然后在resources下添加bootstrap.yml文件，编写内容如下：

spring:
  application:
    name: kiba-gateway
  cloud:
    nacos:
      discovery:
        server-addr: 10.1.0.145:8848
        username: nacos
        password: nacos
        auto-register: true
        reactive:
          enabled: false #关闭响应式发现服务，不需要返回消息，增加注册速度，简化复杂度
    gateway:
      discovery:
        locator:
          enabled: true #网关能够通过特定的机制发现和使用其他服务。该配置会将其他服务自动根据服务名进行映射
      httpclient:
        max-header-size: 104857600
    loadbalancer:
      retry:
        enabled: true #启动负载均衡重试

上文设置了gateway.discovery.locator.enabled=true。所以会将其他服务自动根据服务名进行映射。

项目结构很简单，如下图：

然后启动项目，将网关注册进nacos，如下。

我的nacos里已经有一个服务了。正常请求地址——localhost:8588/user/getFiegn，如下图：

请求网关地址——localhost:9010/app-kiba-feign/user/getFiegn，如下图：

网关成功转发了请求。

注：getway项目一定要最后启动，他是在启动时进行一次服务扫描，然后将服务信息自动配置进去的。如果先启动getway，那么后面启动的服务，将无法被注册进网关。

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https://www.cnblogs.com/kiba/p/18160147