POM檔案依賴
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-gateway</artifactId>
<version>3.0.2</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
nacos的版本如下：
<properties>
<nacos.version>2021.1</nacos.version>
</properties>
gateway的application.yml檔案配置如下：
//fhadmin.cn
server:
port: 9040
spring:
application:
name: gateway
cloud:
gateway:
routes:
- id: consumer
uri: lb://consumer
# uri: http://localhost:9010
predicates:
- Path=/**
nacos:
discovery:
server-addr: localhost:8848
metadata:
preserved.heart.beat.interval: 3 #心跳間隔，時間單位:秒，心跳間隔
preserved.heart.beat.timeout: 6 #心跳暫停，時間單位:秒， 即服務端6秒收不到客戶端心跳，會將該客戶端注冊的實體設為不健康：
preserved.ip.delete.timeout: 9 #Ip洗掉超時，時間單位:秒，即服務端9秒收不到客戶端心跳，會將該客戶端注冊的實體洗掉：
當我通過uri: http://localhost:9010去呼叫服務時，是可以呼叫的，但是當我用uri lb://consumer時就無法呼叫服務，報錯503.
解決辦法是：
加入feign依賴，<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-gateway</artifactId>
<version>3.0.2</version>
</dependency>
<!--fegin組件-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
<version>3.0.2</version>
</dependency>
<!-- Feign Client for loadBalancing -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-loadbalancer</artifactId>
<version>3.0.2</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
猜測原因：nacos兼容feign，feign集成ribbon，默認實作負載均衡；或許是nacos不兼容springcloud gateway自帶的ribbon，實作案例 fhadmin.cn
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標籤：Java