Migrate mongodb native to docker

[admin]

At first you need Backup of your Database.

You can do that with mongodump:

mongodump --db nodebb -u nodebb -p password --gzip --archive=/root/nodebb-backup/mongodb-nodebb-`date +"%d-%m-%y"`.gz 

than we create a folder and copy yml to file

mkdir mongodb nodebb-backup

vi /root/mongodb/docker-compose.yml

services:
  mongo:
    image: 'mongo:4.4'
    restart: unless-stopped
    ports:
      - '27017:27017'
#    environment:
#     MONGO_INITDB_ROOT_USERNAME: nodebb
#     MONGO_INITDB_ROOT_PASSWORD: password
#     MONGO_INITDB_DATABASE: nodebb
    volumes:
      - mongo-data:/data/db
      - /root/nodebb-backup:/root

volumes:
  mongo-data:

Then we start docker Container with your already installed docker and docker-compose file.

docker-compose up -d

Then we have mongo container running without authentication.
We can now import the database backup you made earlier with:

docker exec -ti $(docker ps -qf name=mongodb-mongo-1) mongorestore --db nodebb --gzip --archive=/root/mongodb-nodebb-02-04-25_v4-4.gz

Now you can live with no authentication or you need to add root and user to the Database

you need add following to mongodb

docker exec -ti $(docker ps -qf name=mongodb-mongo-1) bash
mongo
use admin
db.getSiblingDB('admin').createUser(
{
 user:"root",
 pwd:"password",
 roles: ["root"]
})
use nodebb
db.createUser(
  {
    user: "nodebb2",
    pwd: "password",  // or cleartext password
    roles: [
       { role: "readWrite", db:"nodebb" }
    ]
  }
)
exit

Now you can enable authentication with enabling it in yml file

services:
  mongo:
    image: 'mongo:4.4'
    restart: unless-stopped
    ports:
      - '27018:27017'
    environment:
      MONGO_INITDB_ROOT_USERNAME: nodebb
      MONGO_INITDB_ROOT_PASSWORD: password
      MONGO_INITDB_DATABASE: nodebb
    volumes:
      - mongo-data:/data/db
      - /root/nodebb-backup:/root

volumes:
  mongo-data:

Then do docker-compose up -d

docker exec -ti $(docker ps -qf name=mongodb-mongo-1) bash
mongo
use nodebb
db.auth('nodebb2','password');

If everything is working correctly you see an ok statement here.

Greetings