在Docker容器上运行ConfigServer和EurekaServer时无法获取配置文件

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问题描述

[Spring boot Microservies]

我有一个微服务，其中包括2个服务:ConfigService和DiscoveryService

I have a microservices includes 2 services: ConfigService and DiscoveryService

ConfigService 已启用ConfigServer，请为微服务保留文件配置
DiscoveryService 是EurekaServer.它将从ConfigService获取配置文件

ConfigService is enabled ConfigServer, keep files config for microservice
DiscoveryService is EurekaServer. It will get config file from ConfigService

在本地(不是docker)上运行2服务时，一切都很好

When run 2 service on local (not docker), everything is good

Fetching config from server at: http://localhost:8088
Located environment: name=epl-discovery-service, profiles=[default], label=null, version=3f6887b5b355381341e02ad03615f2415d6a566d, state=null
Located property source: CompositePropertySource {name='configService', propertySources=[MapPropertySource {name='configClient'}, MapPropertySource {name='https://github.com/stomer90/epl-config-server.git/epl-discovery-service.yml'}]}
No active profile set, falling back to default profiles: default

但是在2个容器(泊坞窗)上运行2个服务时，ConfigService运行正常，但是DiscoveryService出现一些错误(无法连接到ConfigService)

but when run 2 service on 2 container (docker), ConfigService run normal, but DiscoveryService have some error (can not connect to ConfigService)

Fetching config from server at: http://localhost:8088
Could not locate PropertySource: I/O error on GET request for "http://localhost:8088/epl-discovery-service/default": Connection refused (Connection refused); nested exception is java.net.ConnectException: Connection refused (Connection refused)
No active profile set, falling back to default profiles: default

ConfigService

ConfigService

EplConfigServiceApplication.java

@SpringBootApplication
@EnableConfigServer
public class EplConfigServiceApplication {

    public static void main(String[] args) {
        SpringApplication.run(EplConfigServiceApplication.class, args);
    }
}

bootstrap.yml

server:
  port: 8088

 spring:
  application:
    name: eplconfigserver

  cloud:
    config:
      server:
        git:
          uri: https://github.com/stomer90/epl-config-server.git

Dockerfile

FROM openjdk:8-jdk-alpine

MAINTAINER Phong Nguyen

VOLUME /tmp

# Add Spring Boot app.jar to Container
ADD ./target/epl-config-service-0.0.1-SNAPSHOT.jar app.jar

RUN sh -c 'touch /app.jar'

ENV JAVA_OPTS=""
ENTRYPOINT [ "sh", "-c", "java $JAVA_OPTS -Djava.security.egd=file:/dev/./urandom -jar /app.jar " ]

* DiscoveryService

EplDiscoveryServiceApplication.java

@SpringBootApplication
@EnableEurekaServer
public class EplDiscoveryServiceApplication {

    public static void main(String[] args) {
        SpringApplication.run(EplDiscoveryServiceApplication.class, args);
    }
}

bootstrap.yml

spring:
  application:
    name: epl-discovery-service
  cloud:
    config:
      uri: http://localhost:8088

Dockerfile

FROM openjdk:8-jdk-alpine

MAINTAINER Phong Nguyen

VOLUME /tmp

# Add Spring Boot app.jar to Container
ADD ./target/epl-discovery-service-0.0.1-SNAPSHOT.jar app.jar

RUN sh -c 'touch /app.jar'

ENV JAVA_OPTS=""
ENTRYPOINT [ "sh", "-c", "java $JAVA_OPTS -Djava.security.egd=file:/dev/./urandom -jar /app.jar" ]

Docker-compose.yml

Docker-compose.yml

version: '3.1'

services:
  epl-config-service:
    build: ./epl-config-service
    ports:
      - "8088:8088"
    restart:
      unless-stopped


  epl-discovery-service:
    build: ./epl-discovery-service
    ports:
      - "8061:8061"
    environment:
      - REGISTRY_HOST=epl-config-service
    depends_on:
      - epl-config-service
    restart:
      unless-stopped

链接源代码: https://github.com/stomer90/epl-spring -cloud-microservice

请帮助我解决此问题

推荐答案

因此，您已正确指定了容器启动的顺序，但这不能保证先前的容器(在您的情况下，配置服务器是否正常) )，因为您的docker-compose版本是3.1您可以在撰写文件中定义健康检查

So you have correctly specified the order in which container needs to be started but this doesn't guarantee that previous container (in your case config server is healthy or not) since ur docker-compose version is 3.1you can define healthchecks in your compose file

例如:

 registry:
    build:
      context: ../service-registry
      dockerfile: Dockerfile
    container_name: registry
    links:
      - configuration-server
    depends_on:
      configuration-server:
         condition: service_healthy

和

 configuration-server:
build:
  context: ../configuration-server
  dockerfile: Dockerfile
image: xyz/configuration-server
container_name: configuration-server
environment:
  - SPRING_PROFILES_ACTIVE=dev
  - SPRING_CLOUD_STREAM_KAFKA_BINDER_BROKER=kafka
  - SPRING_CLOUD_STREAM_KAFKA_BINDER_BROKER_PORT=9092
  - SPRING_CLOUD_STREAM_KAFKA_BINDER_ZKNODE=zookeeper
  - SPRING_CLOUD_STREAM_KAFKA_BINDER_ZKPORT=2181
depends_on:
  kafka:
    condition: service_healthy
  zookeeper:
    condition: service_healthy
healthcheck:
    test: "exit 0"

请注意将从注册表服务器调用的配置服务器中的运行状况检查(条件:服务运行状况良好)您可以对更复杂的

notice the healthcheck in config server which would be invoked from registry server (condition:service healthy)you can implement your own custom healthcheck to something more sophesticated like

healthcheck:
  test: ["CMD", "curl", "-f", "http://localhost"]
  interval: 1m30s
  timeout: 10s
  retries: 3
  start_period: 40s

请参阅: https://docs.docker .com/compose/compose-file/compose-file-v2/#healthcheck

我想应该足以启动您的容器，让我知道它是否有效

i guess that should be enough to kickstart your containers, let me know if it works

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