如何将使用Eureka和云配置的spring microservices应用程序对接

我在这个spring微服务应用程序中工作，在我想对微服务进行dockerize之前，一切都正常。对docker略知一二后，我正努力让它发挥作用，以下是我迄今为止所做的：

1.Config服务器 此服务器是一个集中式服务器，包含其他服务的通用配置以及每个微服务的特殊配置

这是配置服务配置

spring.profiles.active=native
server.port=8888
spring.cloud.config.server.native.search-locations=classpath:/common-config
spring.application.name=config-server
#the password which apps will use to access its configurations
spring.security.user.password=1234

然后，我在src/main/resources中添加了一个名为common config的文件夹，其中包含每个服务配置：

discover-service.yml

这是eureka服务器的配置

server:
  port: 8762

然后在配置服务器的根目录中，我添加了两个文件Dockerfile和docker-compose.yml：

Dockerfile

# Start with a base image containing Java runtime
FROM openjdk:8-jdk-alpine

# Add Maintainer Info
LABEL maintainer="sanchi.goyal.sg@gmail.com"

# Add a volume pointing to /tmp
VOLUME /tmp

# Make port 8888 available to the world outside this container
EXPOSE 8888

# The application's jar file
ARG JAR_FILE=./target/*.jar

# Add the application's jar to the container
ADD ${JAR_FILE} app.jar

# Run the jar file
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]

version: "3"

services:
  config-server:
    image: config-server:0.0.1-SNAPSHOT
    environment:
      - JAVA_OPTS=
         -DEUREKA_SERVER=http://discover-service:8762/eureka
    ports:
      - 8888:8888  
  discover-service:
    image: discover-service:0.0.1-SNAPSHOT
    ports:
      - 8762:8762
    depends_on:
      - config-server
restart: on-failure

docker compose

# Start with a base image containing Java runtime
FROM openjdk:8-jdk-alpine

# Add Maintainer Info
LABEL maintainer="sanchi.goyal.sg@gmail.com"

# Add a volume pointing to /tmp
VOLUME /tmp

# Make port 8888 available to the world outside this container
EXPOSE 8888

# The application's jar file
ARG JAR_FILE=./target/*.jar

# Add the application's jar to the container
ADD ${JAR_FILE} app.jar

# Run the jar file
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]

version: "3"

services:
  config-server:
    image: config-server:0.0.1-SNAPSHOT
    environment:
      - JAVA_OPTS=
         -DEUREKA_SERVER=http://discover-service:8762/eureka
    ports:
      - 8888:8888  
  discover-service:
    image: discover-service:0.0.1-SNAPSHOT
    ports:
      - 8762:8762
    depends_on:
      - config-server
restart: on-failure

现在在discover service应用程序中，我在根目录中添加了Dockerfile，如下所示：

    # Start with a base image containing Java runtime
FROM openjdk:8-jdk-alpine

# Add Maintainer Info
LABEL maintainer="sanchi.goyal.sg@gmail.com"

# Add a volume pointing to /tmp
VOLUME /tmp

# Make port 8888 available to the world outside this container
EXPOSE 8762

# The application's jar file
ARG JAR_FILE=./target/*.jar

# Add the application's jar to the container
ADD ${JAR_FILE} app.jar

# Run the jar file
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]

#This file is the entrypoint for spring to know where to look for the configuration file and hold the initial configuration

spring:
  application:
    name: discover-service #name of the application
  cloud:
    config:
      uri: http://localhost:8888 #where the config-service is running
      fail-fast: true #the service will not run if it can't reach the config-service
      password: 1234 #password of the config-service
      username: user #username of the config-service

eureka:
  instance:
    prefer-ip-address: true #when the application registers with eureka, it uses its IP address rather than its hostname
  client:
    registerWithEureka: false #tells the built-in eureka client to not register itself with eureka, because we should act as a server
    fetchRegistry: false

在src/main/resources中，我添加了bootstrap.yml文件，如下所示：

    # Start with a base image containing Java runtime
FROM openjdk:8-jdk-alpine

# Add Maintainer Info
LABEL maintainer="sanchi.goyal.sg@gmail.com"

# Add a volume pointing to /tmp
VOLUME /tmp

# Make port 8888 available to the world outside this container
EXPOSE 8762

# The application's jar file
ARG JAR_FILE=./target/*.jar

# Add the application's jar to the container
ADD ${JAR_FILE} app.jar

# Run the jar file
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]

#This file is the entrypoint for spring to know where to look for the configuration file and hold the initial configuration

spring:
  application:
    name: discover-service #name of the application
  cloud:
    config:
      uri: http://localhost:8888 #where the config-service is running
      fail-fast: true #the service will not run if it can't reach the config-service
      password: 1234 #password of the config-service
      username: user #username of the config-service

eureka:
  instance:
    prefer-ip-address: true #when the application registers with eureka, it uses its IP address rather than its hostname
  client:
    registerWithEureka: false #tells the built-in eureka client to not register itself with eureka, because we should act as a server
    fetchRegistry: false

现在的问题是，在开始dockerize这两个应用程序之前，我为每个应用程序构建了一个jar文件和docker jar文件，因此对于配置服务器应用程序，我创建了两个jar，没有问题，但是对于第二个应用程序，为了创建这两个jar，我必须在bootstrap.yml中保留以下属性，以便它知道配置服务器在哪里

uri: http://localhost:8888

现在转到docker，当我运行命令时：

docker-compose up

第一个应用程序运行正常，但第二个应用程序显示：

Fetching config from server at : http://localhost:8888
Connect Timeout Exception on Url - http://localhost:8888
org.springframework.web.client.ResourceAccessException: I/O error on GET request for "http://localhost:8888/discover-service/default": Connection refused (Connection refused); nested exception is java.net.ConnectException: Connection refused (Connection refused)

有人能帮我吗

这是我的github存储库 我没有提交此问题中描述的更改。你会发现多个服务，但如果我能在docker中运行所描述的两个应用程序，我可以用其他应用程序来运行

编辑 我已通过将docker-compose.yml更改为以下内容来启动我的应用程序：

version: "3"

services:
  config-server:
    image: config-server:0.0.1-SNAPSHOT
    environment:
      - JAVA_OPTS=
         -DEUREKA_SERVER=http://discover-service:8762/eureka
    ports:
      - 8888:8888
  discover-service:
    image: discover-service:0.0.1-SNAPSHOT
    ports:
      - 8762:8762
    depends_on:
      - config-server
    restart: on-failure
networks:
  host:

---

但奇怪的事情正在发生，例如，当我想去发现服务应用程序（这是一个eureka服务器）时，它不起作用，但当我去同一个选项卡上的另一个网站并返回时，它显示了预期的结果

这是否回答了你的问题@利奥帕尔：不，没用