How to create user in mongodb with docker-compose

Question

I'm trying to create some kind of script that will create a docker with mongodb and automatically create a user.

I can usually manage my docker images with docker-compose but this time, I don't know how to do it.

Basically, here is what I have to do:

1. clean/destroy container (docker-compose down)
2. create a docker container with mongodb and start it (without --auth parameter)
3. execute a java script containing db.createUser()
4. stop the container
5. restart the same container with --auth parameter to allow login with the user created in the javascript

I can't find how to do that properly with docker-compose because when it starts, I have to give it the command --auth. If I do that, I cannot execute my javascript to add my user. MongoDB allows users creation without being logged in if there is no user and if --auth parameter is not provided.

I want to do that automatically, I do not want to manually do some commands. The goal is to have a script that can be executed before each integration tests to start from a clean database.

Here is my project:

integration-test/src/test/resources/scripts/docker-compose.yml

mongodb:
    container_name: mongo
    image: mongo
  ports:
    - "27017:27017"
  volumes:
    - .:/setup
  command: --auth

integration-test/src/test/resources/scripts/docker-init.sh

docker-compose down
docker-compose up -d
sleep 1
docker exec mongo bash -c "mongo myDatabase /setup/mongodb-setup.js"

integration-test/src/test/resources/scripts/mongodb-setup.js

db.createUser(
{
    user: "myUser",
    pwd: "myPassword",
    roles: [
      { role: "readWrite", db: "myDatabase" }
    ]
})

Finding a way to start again a container with a new parameter (in this case --auth) would help but I can't find how to do that (docker start does not take parameters).

Any idea how I should do what I would like ?

If not, I can still delete everything from my database with some Java code or something else but I would like a complete mongodb docker setup created with a script.

Answer 1

This is how I do it, my requirement was to bring up a few containers along with mongodb, the other containers expect a user to be present when they come up, this worked for me. The good part is, the mongoClientTemp exits after the command is executed so the container doesn't stick around.

version: '2'
services:
  mongo:
   image: mongo:latest
   container_name: mongo
   ports:
    - "27017:27017"
   volumes:
    - /app/hdp/mongo/data:/data/db

  mongoClientTemp:
   image: mongo:latest
   container_name: mongoClientTemp
   links:
    - mongo:mongo
   command: mongo --host mongo --eval  "db.getSiblingDB('dashboard').createUser({user:'db', pwd:'dbpass', roles:[{role:'readWrite',db:'dashboard'}]});"
   depends_on:
    - mongo

  another-container:
   image: another-image:v01
   container_name: another-container
   ports:
    - "8080:8080"
   volumes:
    - ./logs:/app/logs
   environment:
    - MONGODB_HOST=mongo
    - MONGODB_PORT=27017
   links:
    - mongo:mongo
   depends_on:
    - mongoClientTemp