无法在 Docker-Compose 中使用 Spring Boot 连接到 MongoDB答案

【问题标题】：Unable to connect to MongoDB using Spring Boot in Docker-Compose无法在 Docker-Compose 中使用 Spring Boot 连接到 MongoDB
【发布时间】：2021-06-14 20:44:41
【问题描述】：

我正在尝试在 Docker Compose 中运行我的应用程序和 MongoDB 容器，但出现以下错误：

2021-03-17 13:30:08.776  INFO 1 --- [l'}-mongo:27018] org.mongodb.driver.cluster               : Exception in monitor thread while connecting to server mongo:27018


com.mongodb.MongoSocketOpenException: Exception opening socket
app      |  at com.mongodb.internal.connection.SocketStream.open(SocketStream.java:70) ~[mongodb-driver-core-4.1.1.jar!/:na]
app      |  at com.mongodb.internal.connection.InternalStreamConnection.open(InternalStreamConnection.java:143) ~[mongodb-driver-core-4.1.1.jar!/:na]
app      |  at com.mongodb.internal.connection.DefaultServerMonitor$ServerMonitorRunnable.lookupServerDescription(DefaultServerMonitor.java:188) ~[mongodb-driver-core-4.1.1.jar!/:na]
app      |  at com.mongodb.internal.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:144) ~[mongodb-driver-core-4.1.1.jar!/:na]
app      |  at java.base/java.lang.Thread.run(Unknown Source) ~[na:na]
app      | Caused by: java.net.ConnectException: Connection refused (Connection refused)
app      |  at java.base/java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:na]
app      |  at java.base/java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) ~[na:na]
app      |  at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) ~[na:na]
app      |  at java.base/java.net.AbstractPlainSocketImpl.connect(Unknown Source) ~[na:na]
app      |  at java.base/java.net.SocksSocketImpl.connect(Unknown Source) ~[na:na]
app      |  at java.base/java.net.Socket.connect(Unknown Source) ~[na:na]
app      |  at com.mongodb.internal.connection.SocketStreamHelper.initialize(SocketStreamHelper.java:78) ~[mongodb-driver-core-4.1.1.jar!/:na]
app      |  at com.mongodb.internal.connection.SocketStream.initializeSocket(SocketStream.java:79) ~[mongodb-driver-core-4.1.1.jar!/:na]
app      |  at com.mongodb.internal.connection.SocketStream.open(SocketStream.java:65) ~[mongodb-driver-core-4.1.1.jar!/:na]

docker-compose.yml

version: '3'

services:
  app:
    build:
      context: .
    container_name: app
    hostname: app
    depends_on:
      - mongo
    ports:
      - "8081:8081"
    environment:
      - SPRING_DATA_MONGODB_HOST=mongo
      - SPRING_DATA_MONGODB_PORT=27018
      - SPRING_DATA_MONGODB_DATABASE=tfood

  mongo:
    image: 'mongo:latest'
    container_name: mongo
    hostname: mongo
    volumes:
      - ./data/mongo:/data/db
    ports:
      - "27018:27017"

互联网上遇到与我相同问题的每个人总是在主机名方面遇到一些问题，我的情况不是这样。从错误日志中我看到 docker 获取了连接数据，只是无法连接

【问题讨论】：

标签： java mongodb spring-boot docker docker-compose

【解决方案1】：

如果您想从 Windows/Mac/Linux 桌面连接到 MongoDB，这会在主机上公开端口 27018：

  ports:
      - "27018:27017"

在 Docker 网络内部，暴露给其他 Docker 容器的端口是27017。所以你需要把这个改成27017:

SPRING_DATA_MONGODB_PORT=27017

【讨论】：