Spring 微服务 eureka 客户端未向 eureka 服务器注册

Question

I'm very new to everything about docker, spring framework... They run on localhost environment successfully, now I want to push them into docker, but always gave me error there, i got stuck on it about a week. Can someone help me figure it out PLEASE!!!

now I have eureka-server and cloud-config-server services, here is my code:

eureka-server application.yml

server:
  port: 8761
spring:
  application:
    name: service-registration
eureka:
  client:
    register-with-eureka: false
    fetch-registry: false
management:
  security:
    enabled: false

and Dockerfile:

FROM openjdk:11
COPY target/service-registration-0.0.1-SNAPSHOT.jar service-registration.jar
EXPOSE 8761
CMD ["java", "-jar", "service-registration.jar"]

Now I have cloud-config-server application.yml: In this file, i tried to backup it on github. From the start, I tried to change the hostname as localhost or any other hostname like service-registration, eureka-server etc... but not work, and "service-url" or "serviceUrl'....

server:
  port: 9291

spring:
  application:
    name: cloud-config-server
  profiles:
    active: production
#  cloud:
#    config:
#      server:
#        git:
#          uri: https://github.com/sshaunn/config-server
#          clone-on-start: true

eureka:
  client:
    register-with-eureka: true
    fetch-registry: true
    serviceUrl:
      defaultZone: http://service-registration:8761/eureka/
  instance:
#    prefer-ip-address: true
#    ip-address: http://eureka-server:8761/eureka/å
    hostname: service-registration

Dockerfile:

FROM openjdk:11
COPY target/cloud-config-server-0.0.1-SNAPSHOT.jar cloud-config-server.jar
EXPOSE 9291
ENTRYPOINT ["java", "-jar", "cloud-config-server.jar"]

and the docker-compose.yml file:

version: '3.7'
services:
  service-registration:
    image: service-registration
    networks:
      - eureka-server
    ports:
      - "8761:8761"
    container_name: service-registration
    hostname: service-registration
  cloud-config-server:
    build: cloud-config-server
    networks:
      - eureka-server
    ports:
      - "9291:9291"
    depends_on:
      - service-registration
    container_name: cloud-config-server
    hostname: service-registration
    environment:
      EUREKA_CLIENT_SERVICEURL_DEFAULTZONE: http://service-registration:8761/eureka

networks:
  eureka-server:
    name: eureka-server
    driver: bridge
#  route:
#    image: route
#    ports:
#      - "9191:9191"
#    container_name: api-gateway

#    environment:
#      EUREKA_CLIENT_SERVICEURL_DEFAULTZONE: http://service-registration:8761/eureka

The error logs here:

2022-05-29 07:22:41.713 WARN 1 --- [freshExecutor-0] c.ndstdRetryableEurekaHttpClient: Request execution failed with message: I/O error on GET request for "http://localhost:8761/eureka/apps/": Connect to localhost:8761 [localhost/127.0.0.1] failed: Connection refused (Connection refused); 2022-05-29 07:06:11.565 WARN 1 --- [tbeatExecutor-0] c.ndstdRetryableEurekaHttpClient: Request execution failed with message: I/O error on PUT request for "http://localhost:8761/eureka/apps/CONFIG-SERVER/service-registration:CONFIG-SERVER:9291": Connect to localhost:8761 [localhost/127.0.0.1] failed: Connection refused (Connection refused);

Answer 1

Ok, I dont know why but I set up a docker-compose.yml file like this and it works: Note, I set up environment about "service-url" defaultZone in docker-compose.yml file.

version: '3.7'
services:
  service-registration:
    container_name: service-registration
    build:
      context: ./service-registration
      dockerfile: Dockerfile
    ports:
      - "8761:8761"
  cloud-config-server:
    container_name: cloud-config-server
    build:
      context: ./cloud-config-server
      dockerfile: Dockerfile
    environment:
      - eureka.client.service-url.defaultZone=http://service-registration:8761/eureka
    depends_on:
      - service-registration
    ports:
      - "9191:9191"
  route:
    container_name: route
    build:
      context: ./route
      dockerfile: Dockerfile
    environment:
      - eureka.client.service-url.defaultZone=http://service-registration:8761/eureka
    depends_on:
      - service-registration
      - employee
      - income
    ports:
      - "9291:9291"
  employee:
    container_name: employee
    build:
      context: ./employee
      dockerfile: Dockerfile
    environment:
      - eureka.client.service-url.defaultZone=http://service-registration:8761/eureka
    depends_on:
      - service-registration
    ports:
      - "9001:9001"
  income:
    container_name: income
    build:
      context: ./income
      dockerfile: Dockerfile
    environment:
      - eureka.client.service-url.defaultZone=http://service-registration:8761/eureka
    depends_on:
      - service-registration
    ports:
      - "9002:9002"

Answer 2

You should use your host ip address to run in your local machine. For the docker it should not be localhost

Try with the below configuration in your application.properties file.

eureka.client.service-url.defaultZone=http://host.docker.internal:8761/eureka/