docker: mongodb

image

terminal

docker pull mongo

localhost:27017でDBに接続する場合

docker

terminal

# launch
docker run --name mongodb -p 27017:27017 -v `pwd`/db:/data/db -d mongo

# stop
docker rm -f mongodb

# shell
docker exec -it mongodb mongo

docker-compose

docker-compose.yml

version: '3.8'
services:
  db:
    image: mongo
    container_name: mongodb
    ports:
      - 27017:27017
    volumes:
      - ./db:/data/db

terminal

# launch
docker-compose up

# stop
docker-compose down

他のdockerコンテナから直接アクセスする場合

例、dockerコンテナで動くnode.jsアプリ(localhost:3000でアクセス)から、mongodbに、mongodb://db:27017 でアクセスする

docker-compose

docker-compose.yml

version: '3.8'
services:
  web:
    image: node:alpine
    working_dir: /home/node/app
    volumes:
      - ./:/home/node/app
    ports:
      - 3000:3000
    command: ash -c "npm run build && npm start"
  db:
    image: mongo #portsの指定は不要.
    volumes:
      - ./db:/data/db

terminal

# launch
docker-compose up

# stop
docker-compose down

サンプルコード.ts

import { MongoClient, Collection } from 'mongodb'

const URL = 'mongodb://db:27017'
const NAME = 'mongodb'

export async function insertDocument(collectionName: string, document: object) {
  await crudCollection(
    collectionName,
    async (collection) => await collection.insertOne(document)
  )
}

export async function findDocuments(
  collectionName: string,
  filter: object
): Promise<any[]> {
  return await crudCollection(
    collectionName,
    async (collection) => await collection.find(filter).toArray()
  )
}

export async function updateDocument(
  collectionName: string,
  filter: object,
  newDocument: object
) {
  await crudCollection(
    collectionName,
    async (collection) =>
      await collection.updateOne(filter, { $set: newDocument })
  )
}

export async function deleteDocument(collectionName: string, filter: object) {
  await crudCollection(
    collectionName,
    async (collection) => await collection.deleteOne(filter)
  )
}

/**
 * @private
 */
async function crudCollection(
  collectionName: string,
  method: (collection: Collection<any>) => Promise<any>
) {
  let client: MongoClient
  try {
    client = await MongoClient.connect(URL, { useNewUrlParser: true })
    const collection = client.db(NAME).collection(collectionName)
    return await method(collection)
  } finally {
    client.close()
  }
}