因此，我有2个服务。Kweet当我手动运行这两个服务+docker中的其余服务时，它就工作了。其余的服务包括MongoDB、RabbitMQ、Spring Cloud Gateway、Eureka Discovery。但当我运行这两个服务时，（micro）服务（我只是使用一个docker compose），rabbitmq功能停止工作。正常的API调用工作，具体来说就是RabbitMQ调用失败。
RabbitMQ功能：

EditUsername, edits username in user-service. 
Than sends data via RabbitMQ (this is where it goes wrong I think) to kweet-service where it edits the username of a kweet.

Dock合成文件：

version: '3.8'

services:
  eureka-service:
    build: ./eureka-discovery-service
    restart: always
    container_name: eureka-service
    ports:
      - 8087:8087

  api-gateway:
    build: ./api-gateway
    restart: always
    container_name: api-gateway
    depends_on:
      - eureka-service
    ports:
      - 8080:8080

  user:
    build: ./user
    restart: unless-stopped
    container_name: user-ms
    ports:
      - 8081:8081
    depends_on:
      - eureka-service

  kweet:
    build: ./kweet
    restart: unless-stopped
    container_name: kweet-ms
    depends_on:
      - eureka-service
    ports:
    - 8082:8082

  mongodb:
    image: mongo
    restart: always
    container_name: mongodb
    ports:
      - 27017:27017

  rabbitmq:
    image: rabbitmq:management
    restart: always
    container_name: rabbitmq
    hostname: rabbitmq
    ports:
      - 5672:5672
      - 15672:15672

当我尝试拨打电话时，控制台显示：

user-ms  |  2022-04-27 08:52:04.823  INFO 1 --- [nio-8081-exec-4] o.s.a.r.c.CachingConnectionFactory : Attempting to connect to: [localhost:5672]

我得到的 Postman 状态是503 Service Unavailable，这不是我做的任何try-catch的。有人知道问题可能出在哪里吗？

**EDIT[ConnectionFactory]：**我尝试使用文档并添加了一个CachingConnectionFactory，但结果是一样的。我做错了吗？我将此添加到RabbitMQ/Message-config（主机、用户名、密码来自application.properties：

@Bean
    public AmqpTemplate template() {
        CachingConnectionFactory connectionFactory = new CachingConnectionFactory(HOST);
        connectionFactory.setUsername(USERNAME);
        connectionFactory.setPassword(PASSWORD);
        final RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory);
        rabbitTemplate.setMessageConverter(converter());
        return rabbitTemplate;
    }

**EDIT [docker-compose]：**找到了这个源代码（https://www.linkedin.com/pulse/binding-your-docker-app-container-rabbitmq-phani-bushan/），它消除了我的503 Service Unavailable错误。我现在发现的问题是，每当我启动容器时，它会生成新的队列和交换，而不是I set up in my application.properties。

现在，每当我拨打电话时，它都会显示以下日志：

user-ms | 2022-04-28 07:36:28.825  INFO 1 --- [nio-8081-exec-1] o.s.a.r.c.CachingConnectionFactory : Created new connection: rabbitConnectionFactory#2ca65ce4:0/SimpleCo
nnection@7e7052f [delegate=amqp://guest@172.23.0.4:5672/, localPort= 43208]

试过的事情：

• 通过CachingConnectionFactory在代码中将主机更改为[rabbitmq-container-name]
• 使用environment: - spring_rabbitmq_host=[rabbitmq-container-name]在Docker compose中将主机更改为[rabbitmq-container-name]

build: ./user
  restart: unless-stopped
  container_name: user-ms
  depends_on:
    - eureka-service
    - rabbitmq
  ports:
    - 8081:8081
  environment:
    - spring_rabbitmq_host=[rabbitmq-container-name]

• 我尝试了host.docker.internal和localhost，而不是[rabbitmq-container-name]