Docker MongoNetworkError：通过 docker 构建 Node JS 应用程序时连接超时

Question

无法连接到 Mongodb。由 Docker 安装的

let dbRoute = "mongodb://mongo:27017/kgp_news"

const option = {
    socketTimeoutMS: 30000,
    keepAlive: true,
    reconnectTries: 30000,
    useNewUrlParser: true 
};

mongoose.connect(dbRoute, option)

我通过docker安装mongo。它运行端口 27017。

当我通过脚本“node index.js”运行项目时。这是工作。

但是当我通过编写 Dockerfile 构建应用程序时。无法连接到 Mongo。 MongoNetworkError: connection timed out

    at Pool.<anonymous> (/api_kgp/docker_build/node_modules/mongodb-core/lib/topologies/server.js:431:11)
    at Pool.emit (events.js:198:13)
    at connect (/api_kgp/docker_build/node_modules/mongodb-core/lib/connection/pool.js:557:14)
    at makeConnection (/api_kgp/docker_build/node_modules/mongodb-core/lib/connection/connect.js:39:11)
    at callback (/api_kgp/docker_build/node_modules/mongodb-core/lib/connection/connect.js:261:5)
    at Socket.err (/api_kgp/docker_build/node_modules/mongodb-core/lib/connection/connect.js:286:7)
    at Object.onceWrapper (events.js:286:20)
    at Socket.emit (events.js:198:13)
    at Socket._onTimeout (net.js:442:8)
    at ontimeout (timers.js:436:11)
    at tryOnTimeout (timers.js:300:5)
    at listOnTimeout (timers.js:263:5)
    at Timer.processTimers (timers.js:223:10)
(node:20) 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(). (rejection id: 1)
(node:20) [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

mongo已安装，container因此请确保：

1. 27017当您运行构建时公开端口container，

   docker run -p 27017:27017 ....

2. 在node代码中，使用以下方式连接到mongo容器：容器网络的IP地址网关是172.17.0.1:27017

所以：

let dbRoute = "mongodb://172.17.0.1:27017/kgp_news"