ubuntu docker container connect with mongdb running on localhost in windows

Question

I pulled the ubuntu image and run the container on my windows. I want to connect my MongoDB running locally on windows with ubuntu container. How it is possible or if not what is the best practice to achieve this?

Answer 1

You could use docker-compose network

By default Compose sets up a single network for your app. Each container for a service joins the default network and is both reachable by other containers on that network, and discoverable by them at a hostname identical to the container name.

Let's use a Node app with MongoDB for example.

Your docker-compose file Docker compose.yaml

version: "3"
services:
  app:
    image: myapp:latest # your app docker image
    depends_on:
      - db
    ports:
      - 80:80
    networks:
      - network
    environment:
      - MONGO_URL=mongodb://db:27017 #MongoUrl you can use in your app to connect
  db:
    image: mongo:latest
   volumes:
      - /data/db:/data/db
    ports:
      - 27017:27017
    networks:
      - network
networks:
  network:
    driver: bridge

You can connect with the environment variables in Node as below

import mongoose from "mongoose"
const mongodbUrl = process.env.MONGO_URL
const mongoConnectionOptions = {
  useNewUrlParser: true,
  useUnifiedTopology: true,
  poolSize: 10,
  bufferMaxEntries: 0
}
mongoose
  .connect(mongodbUrl, mongoConnectionOptions)
  .then(async (db) => {
    console.log(`Mongo db ${db.version} is connected`)
  })
  .catch((err) => {
    console.log("MongoDB connection error. Please make sure MongoDB is running. " + err)
  })

Then use docker-compose up to start these 2 services