Docker mongodb config file

Question

There is a way to link /data/db directory of the container to your localhost. But I can not find anything about configuration. How to link /etc/mongo.conf to anything from my local file system. Or maybe some other approach is used. Please share your experience.

Answer 1

I'm using the mongodb 3.4 official docker image. Since the mongod doesn't read a config file by default, this is how I start the mongod service:

docker run -d --name mongodb-test -p 37017:27017 \  -v /home/sa/data/mongod.conf:/etc/mongod.conf \  -v /home/sa/data/db:/data/db mongo --config /etc/mongod.conf 

removing -d will show you the initialization of the container

Using a docker-compose.yml:

version: '3' services:  mongodb_server:     container_name: mongodb_server     image: mongo:3.4     env_file: './dev.env'     command:         - '--auth'         - '-f'         - '/etc/mongod.conf'     volumes:         - '/home/sa/data/mongod.conf:/etc/mongod.conf'         - '/home/sa/data/db:/data/db'     ports:         - '37017:27017' 

then

docker-compose up 

Answer 2

When you run docker container using this:

docker run -d -v /var/lib/mongo:/data/db \  -v /home/user/mongo.conf:/etc/mongo.conf -p port:port image_name 

/var/lib/mongo is a host's mongo folder.

/data/db is a folder in docker container.