Gatway+Nacos整合

导入依赖

<!--            Nacos注册中心-->
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
                <version>2021.0.1.0</version>
            </dependency>

<!--            Gateway网关-->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-gateway</artifactId>
                <version>3.1.1</version>
            </dependency>

配置文件

spring:
  application:
    name: Gateway
  cloud:
    nacos:
      discovery:
        server-addr: 172.17.8.101:8801
        namespace: 708269cb-5fa5-40eb-abe6-bbe8e9320a85
    gateway:
      discovery:
        locator:
          enabled: true #发现服务
      routes:
        - id: Management #路由id,唯一
          uri: lb://Management
#          uri: lb://Management #负载到consumer
          predicates:
            - Path=/management/** #以city开头的请求都负载到consumer服务
#          filters:
#            - RewritePath=/management/(?<segment>.*), /$\{segment} #过滤掉url里的city,例如http://ip:port/city/getCity -> http://ip:port/getCity
server:
  port: 80

接着启动，启动后发现yaml报错

10:47:40.370 [main] DEBUG org.springframework.boot.diagnostics.LoggingFailureAnalysisReporter - Application failed to start due to an exception
java.lang.NoSuchMethodError: 'void org.yaml.snakeyaml.LoaderOptions.setMaxAliasesForCollections(int)'10:47:40.370 [main] DEBUG org.springframework.boot.diagnostics.LoggingFailureAnalysisReporter - Application failed to start due to an exception
java.lang.NoSuchMethodError: 'void org.yaml.snakeyaml.LoaderOptions.setMaxAliasesForCollections(int)'

需要屏蔽nacos自带的yaml依赖，再自己导入一个yaml

<!--            Nacos注册中心-->
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
    <version>2021.0.1.0</version>
    <exclusions>
        <exclusion>
            <groupId>org.yaml</groupId>
            <artifactId>snakeyaml</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.yaml</groupId>
    <artifactId>snakeyaml</artifactId>
    <version>1.33</version>
</dependency>

然后接着启动Gateway成功启动后，发现服务无法访问，我们就就要导入Feign依赖，两个依赖建议和Gateway的版本一样：

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-openfeign</artifactId>
    <version>3.1.1</version>
</dependency>
<!-- Feign Client for loadBalancing -->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-loadbalancer</artifactId>
    <version>3.1.1</version>
</dependency>