mongodb 和 mongo-express 没有与 docker-compose 连接

Question

我是学习 docker 的新手，在这里学习。这是我的 compose.yaml 文件，其中包含 mongo 和 mongo-express 最新版本用例。 mongo-express 没有连接到 mongodb，尝试了 mongo-express 中的重新启动功能，它继续重新启动 mongo-express，我就足够了，它没有与 mongodb 连接。我试过给予网络并没有改变任何东西。

version: "3"
services:
  mongodb:
    image: mongo
    ports:
      - "27017:27017"
    environment:
      - MONGO_INITDB_ROOT_USERNAME=admin
      - MONGO_INITDB_ROOT_PASSWORD=password
    # networks:
    #   - mongo-network
  mongo-express:
    image: mongo-express
    # restart: on-failure
    ports:
      - "8081:8081"
    environment:
      - ME_CONFIG_MONGODB_ADMINUSERNAME=admin
      - ME_CONFIG_MONGODB_ADMINPASSWORD=password
      - ME_CONFIG_MONGODB_ADMINSERVER=mongodb
      - ME_CONFIG_MONGODB_PORT=27017
    # networks:
    #   - mongo-network
    depends_on:
      - mongodb

这是我从 mongo-express 容器进入命令提示符的错误：

2022-11-15 10:39:21 Welcome to mongo-express
2022-11-15 10:39:21 ------------------------
2022-11-15 10:39:21 
2022-11-15 10:39:21 
2022-11-15 10:39:21 (node:7) [MONGODB DRIVER] Warning: Current Server Discovery and Monitoring engine is deprecated, and will be removed in a future version. To use the new Server Discover and Monitoring engine, pass option { useUnifiedTopology: true } to the MongoClient constructor.
2022-11-15 10:39:26 Could not connect to database using connectionString: mongodb://mongo:27017"
2022-11-15 10:39:26 (node:7) UnhandledPromiseRejectionWarning: MongoNetworkError: failed to connect to server [mongo:27017] on first connect [Error: getaddrinfo EAI_AGAIN mongo
2022-11-15 10:39:26     at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:66:26) {
2022-11-15 10:39:26   name: 'MongoNetworkError'
2022-11-15 10:39:26 }]
2022-11-15 10:39:26     at Pool.<anonymous> (/node_modules/mongodb/lib/core/topologies/server.js:441:11)
2022-11-15 10:39:26     at Pool.emit (events.js:314:20)
2022-11-15 10:39:26     at /node_modules/mongodb/lib/core/connection/pool.js:564:14
2022-11-15 10:39:26     at /node_modules/mongodb/lib/core/connection/pool.js:1000:11
2022-11-15 10:39:26     at /node_modules/mongodb/lib/core/connection/connect.js:32:7
2022-11-15 10:39:26     at callback (/node_modules/mongodb/lib/core/connection/connect.js:300:5)
2022-11-15 10:39:26     at Socket.<anonymous> (/node_modules/mongodb/lib/core/connection/connect.js:330:7)
2022-11-15 10:39:26     at Object.onceWrapper (events.js:421:26)
2022-11-15 10:39:26     at Socket.emit (events.js:314:20)
2022-11-15 10:39:26     at emitErrorNT (internal/streams/destroy.js:92:8)
2022-11-15 10:39:26     at emitErrorAndCloseNT (internal/streams/destroy.js:60:3)
2022-11-15 10:39:26     at processTicksAndRejections (internal/process/task_queues.js:84:21)
2022-11-15 10:39:26 (node:7) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
2022-11-15 10:39:26 (node:7) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

Answer 1

根据文档，服务器环境变量不是 ME_CONFIG_MONGODB_ADMINSERVER 而是 ME_CONFIG_MONGODB_SERVER： https://hub.docker.com/_/mongo-express

您还需要为 mongodb 添加健康检查并使 mongo-express 依赖于它，因为节点在第一次连接失败后以退出代码 0 退出，如日志中所述。如果它将以非零退出代码退出，只要它没有失败，docker 就会尝试重新启动容器。它在日志中说，这将是未来的方式，但现在你需要健康检查。

（节点：7）[DEP0018] DeprecationWarning：未处理的承诺拒绝 已弃用。将来，未处理的承诺拒绝 将以非零退出代码终止 Node.js 进程。

所以这个撰写文件有效：

version: "3"
services:
  mongodb:
    image: mongo
    ports:
      - "27017:27017"
    environment:
      - MONGO_INITDB_ROOT_USERNAME=admin
      - MONGO_INITDB_ROOT_PASSWORD=password
    healthcheck:
      test:  echo 'db.runCommand("ping").ok' | mongosh localhost:27017/test --quiet
      interval: 10s
      timeout: 10s
      retries: 5
      start_period: 10s
  mongo-express:
    image: mongo-express
    # restart: on-failure
    ports:
      - "8081:8081"
    environment:
      - ME_CONFIG_MONGODB_ADMINUSERNAME=admin
      - ME_CONFIG_MONGODB_ADMINPASSWORD=password
      - ME_CONFIG_MONGODB_SERVER=mongodb
      - ME_CONFIG_MONGODB_PORT=27017
    depends_on:
      mongodb:
        condition: service_healthy

Answer 2

这对我有用：

版本：“3.8”
服务：
  ps_mongodb：
    图片：mongo：最新
    容器名称：ps_mongodb
    环境：
        - MONGO_INITDB_ROOT_USERNAME=adminUsr
        - MONGO_INITDB_ROOT_PASSWORD=adminPwd
    健康检查：
      测试： echo 'db.runCommand("ping").ok' | mongosh localhost:27021/admin --quiet
      间隔：10s
      超时：10s
      重试：5
      start_period: 10s
    网络：
      - ps-mongo-网络
    重启：总是
    命令：mongod --auth --port 27021
    端口：
      - “27021:27021”
    卷：
      - ./数据库/数据库：/数据/数据库
      - ./database/dev.archive:/Databases/dev.archive
      - ./database/production:/Databases/production
      #- ./mongo-init.js:/docker-entrypoint-initdb.d/mongo-init.js:ro
      # mongo.dbHost=172.17.0.1 用于在终端中使用 :>ifconfig 进行本地访问
  ps_mongoexp：
    图片：mongo-express
    容器名称：ps_mongoexp
    重启：总是
    依赖于取决于：
      ps_mongodb：
        条件：service_healthy
    环境：
      - ME_CONFIG_MONGODB_ADMINUSERNAME=adminUsr
      - ME_CONFIG_MONGODB_ADMINPASSWORD=adminPwd
      - ME_CONFIG_MONGODB_EN​​ABLE_ADMIN=true
      - ME_CONFIG_MONGODB_SERVER=ps_mongodb
      - ME_CONFIG_MONGODB_PORT=27021
      - ME_CONFIG_MONGODB_URL=mongodb://adminUsr:adminPwd@ps_mongodb:27021/?authSource=admin
      - ME_CONFIG_BASICAUTH_USERNAME=admin
      - ME_CONFIG_BASICAUTH_PASSWORD=admin
    网络：
      - ps-mongo-网络
    端口：
      - “8081:8081”
网络：
  ps-mongo-网络：
    司机：桥