I am trying to get a simple microservice to register to the Eureka Server and then have Zuul proxy to the microservice. I got the microservice to register to the Eureka Server. However, whenever I bring the Zuul service up I see that it is not registering to the Eureka Server. Whenever I try to route to the microservice I get the below exception:
Load balancer does not have available server for client: microservice
I am not able to figure out where the issue is. Any help would be greatly appreciated
Below are my Spring Boot classes for each of these components.
Microservice Components
MicroserviceApplication.java
@SpringBootApplication(scanBasePackages = { "some.package.controller", "some.package.service" })
@EnableEurekaClient
@EnableJpaRepositories("some.package.repository")
@EntityScan("some.package.entity")
public class MicroserviceApplication {
public static void main(String[] args) {
SpringApplication.run(MicroserviceApplication.class, args);
}
}
bootstrap.yml
server:
port: 8090
info:
component: Core Services
spring:
application:
name: microservice
application.yml
eureka:
instance:
leaseRenewalIntervalInSeconds: 1
leaseExpirationDurationInSeconds: 2
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka/
healthcheck:
enabled: true
lease:
duration: 5
#some other logging and jpa properties below
Eureka Server Components
EurekaServerApplication.java
@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication {
public static void main(String[] args) {
SpringApplication.run(EurekaServerApplication.class, args);
}
}
bootstrap.yml
spring:
application:
name: discovery-server
application.yml
server:
port: 8761
info:
component: Discovery Server
eureka:
client:
registerWithEureka: false
fetchRegistry: false
serviceUrl:
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
instance:
hostname: localhost
server:
waitTimeInMsWhenSyncEmpty: 0
API Gateway Components
ZuulGatewayApplication.java
@SpringBootApplication
@EnableZuulProxy
public class ZuulGatewayApplication {
public static void main(String[] args) {
SpringApplication.run(ZuulGatewayApplication.class, args);
}
@Bean
public ZuulGatewayPreFilter gatewayPreFilter() {
return new ZuulGatewayPreFilter();
}
}
bootstrap.yml
spring:
application:
name: api-gateway
application.yml
server:
port: 8888
info:
component: API Gateway
eureka:
instance:
leaseRenewalIntervalInSeconds: 1
leaseExpirationDurationInSeconds: 2
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka/
zuul:
routes:
microservice:
path: /microservice/**
serviceId: microservice
Adding @EnableEurekaClient
solved this issue. The Zuul application is now discoverable in the Eureka server and is able to route requests.