Gateway reports an error service_ UNAVAILABLE

background

Used when building a microservice framework Gateway gateway , The gateway is connected , But an exception was reported when calling the service .

SERVICE_UNAVAILABLE "Unable to find instance for admin-auth"

Related configuration

admin-gateway.yml rely on

<dependencies>
        <!--  reason ： In this version SpringCloud No longer load preferentially by default bootstrap.yml file , terms of settlement ： add to spring-cloud-starter-bootstrap rely on  -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bootstrap</artifactId>
        </dependency>

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

        <!-- SpringCloud Alibaba Nacos -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

        <!-- SpringCloud Alibaba Nacos Config -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>

        <!-- SpringCloud Alibaba Sentinel -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
        </dependency>

        <!-- SpringCloud Alibaba Sentinel Gateway -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-alibaba-sentinel-gateway</artifactId>
        </dependency>
        <!-- Sentinel Datasource Nacos -->
        <dependency>
            <groupId>com.alibaba.csp</groupId>
            <artifactId>sentinel-datasource-nacos</artifactId>
        </dependency>
</dependencies>

To configure

server:
  port: 10010

spring:
  application:
    name: @[email protected]
  cloud:
    nacos:
      server-addr: 127.0.0.1:8848 # nacos Address 
    gateway:
      discovery:
        locator:
          enabled: true
      routes:
        - id: admin-auth #  Route identification , Must be unique 
          uri: lb://admin-auth #  The destination address of the route ,lb by load balance, Load balancing 
          predicates: #  Route assertion , Determine whether the request meets the rules 
            - Path=/admin-auth/**  #  Determine whether the request is /user start 

solve

because Gateway The bottom layer uses Ribbon As load balancing , There are no related components in the dependency , Therefore, correct distribution cannot be carried out . Just add in ：

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