Eureka client in docker not connecting with Eureka server

user_2531769 0
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I have one eureka server.

server:
  port: 8761
eureka:
  client:
    registerWithEureka: false
    fetchRegistry: false

I have one eureka client.

spring:
  application:
    name: mysearch
server:
  port: 8020
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka
  instance:
    preferIpAddress: true

My eureka client is running in a docker container.

FROM java:8
COPY ./mysearch.jar /var/tmp/app.jar
EXPOSE 8180
CMD ["java","-jar","/var/tmp/app.jar"]

I am starting the eureka server by java -jar eureka-server.jar After that I am starting the docker instance of the eureka client using sudo docker build -t web . and sudo docker run -p 8180:8020 -it web. I am able to access the eureka client and server from browser but the client is not connecting with Eureka server. I am not able to see the client in the eureka server dashboard. I am getting below errors and warnings.

WARN 1 --- [tbeatExecutor-0] c.n.d.s.t.d.RetryableEurekaHttpClient    : Request execution failed with message: java.net.ConnectException: Connection refused (Connection refused)
ERROR 1 --- [tbeatExecutor-0] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_FLIGHTSEARCH/98b0d95fd668:flightsearch:8020 - was unable to send heartbeat!
INFO 1 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_FLIGHTSEARCH/98b0d95fd668:flightsearch:8020: registering service...
ERROR 1 --- [nfoReplicator-0] c.n.d.s.t.d.RedirectingEurekaHttpClient  : Request execution error
WARN 1 --- [nfoReplicator-0] c.n.d.s.t.d.RetryableEurekaHttpClient    : Request execution failed with message: java.net.ConnectException: Connection refused (Connection refused)
WARN 1 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_FLIGHTSEARCH/98b0d95fd668:flightsearch:8020 - registration failed Cannot execute request on any known server
WARN 1 --- [nfoReplicator-0] c.n.discovery.InstanceInfoReplicator     : There was a problem with the instance info replicator

I am doing it in an AWS EC2 Ubuntu instance. Can anyone please tell me what I am doing wrong here?

netflix-eureka spring-boot docker
3 Answers

In the container world, the eureka server ip address can change each time the eureka server is restarted. Hence specifying the host ip address for eureka server url doesn't work all the time.

In the docker-compose.yml, I had to link the eureka client service to the eureka server container. Until I link the services, eureka client couldn't connect to the server.

This is already answered in another post recently: Applications not registering to eureka when using docker-compose

user_132544690
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