Unable to name a Mongo database in Docker compose

Question

Can anyone tell me where I am going wrong. All I am trying to do is name a Mongo database using docker compose.

I have a docker compose file that looks like this:

version: "3"
services:
  mongo-db:
    image: mongo
    environment:
      - MONGO_INITDB_ROOT_USERNAME=admin
      - MONGO_INITDB_ROOT_PASSWORD=password
      - MONGO_INITDB_DATABASE=mydbname
    ports:
      - 27017:27017
    volumes:
      - mongo-db:/data/db

volumes:
  mongo-db:

I run docker docker-compose -f docker-compose.yml up -d --build and it runs. I then open Robo 3T and connect to my container but every time I do the database is called test and not mydbname. Any ideas? TIA

Answer 1

The environment variables are only used to create a new database if no database already exists. You map a volume to /data/db and that volume probably contains an existing database named 'test'.

Find the volume using docker volume ls. It's called something like <directory name>_mongo-db. Then delete it using docker volume rm <volume name>.

Now Docker will create a new, empty volume and Mongo will create a new database when you start the container. And it'll use the values from the environment variables.