Docker networking not working with eureka

Question

I have one eureka server inside a docker container and another application inside another docker container. I have made a network using docker network create eureka-s1. So, I'm running the eureka server using the command: docker run --network eureka-s1 --name eureka-server -p 8761:8761 f595acb214d5 The config file of the eureka server is as follows:

spring:
  application:
    name: discovery-service

eureka:
  instance:
    prefer-ip-address:true
    hostname:localhost

  client:
    eureka-server-connect-timeout-seconds: 5
    enabled: true
    fetch-registry: false
    register-with-eureka: false

server:
  port: 8761

So, its running fine. Now, when I run my application using the command: docker run --network eureka-s1 --name first-service -p 8080:8080 c16b2442b890, the application is not registering to eureka. The config file of the client is as follows:

spring:
  application:
    name: first-service
server:
  port: 8080
eureka:
  client:
    fetch-registry: true
    serviceUrl:
      defaultZone: http://eureka-server:8761/eureka  

Can someone point out the problem here? Thanks.

Edit: Eureka Server Dockerfile:

FROM openjdk:8
ADD target/cloud-eureka-discovery-service-1.0.0-SNAPSHOT.jar cloud-eureka-discovery-service-1.0.0-SNAPSHOT.jar
EXPOSE 8761
ENTRYPOINT ["java", "-jar", "cloud-eureka-discovery-service-1.0.0-SNAPSHOT.jar"]

Eureka Client Dockerfile:

FROM openjdk:8
ADD target/first-service-0.0.1-SNAPSHOT.jar first-service-0.0.1-SNAPSHOT.jar
EXPOSE 8080
ENTRYPOINT ["java", "-jar", "first-service-0.0.1-SNAPSHOT.jar"]

Answer 1

It's work fine with docker-compose.

Below is the docker-compose.yml

version: '2.1'

services:
  eureka:
    build: ${PATH_TO_EUREKA_FOLDER}
    mem_limit: 350m
    networks:
        - my-network
    healthcheck:
      test: ["CMD", "curl", "-f", "http://eureka:8761"]
      interval: 30s
      timeout: 10s
      retries: 5

  client:
    build: ${PATH_TO_YOUR_CLIENT_FOLDER}
    mem_limit: 350m
    networks:
      - my-network
    links:
      - eureka
    depends_on:
      eureka:
        condition: service_healthy


networks:
  my-network:
    name: my-network

And add update your client config file as bellow :

spring:
    application:
        name: first-service
server:
    port: 8080
eureka:
    client:
        fetch-registry: true
        serviceUrl:
            defaultZone: http://eureka:8761/eureka

And update the Dockerfile of the eureka server as bellow :

FROM openjdk:8

RUN apt-get update
RUN apt-get install -y curl

EXPOSE 8761

ADD ./target/*.jar app.jar

ENTRYPOINT ["java","-jar","/app.jar"]

And next to docker-compose.yml run

docker-compose up --build

And don't forget to run mvn clean install your client application.