How to reduce mongo log verbosity in a docker-compose image?

Question

I'm running MongoDB inside a larger server, controlled by docker-compose.

I'd like to reduce the verbosity of the Mongo logs (and probably eventually control other Mongo settings too). Not sure where to fit this into my minimal config; I currently just have:

  mongo:
    image: mongo:3.2
    volumes:
      - ${MONGO_DATA_DB}:/data/db
    ports:
      - ${EXPOSED_MONGO_PORT}:27017

Answer 1

I've tried the accepted answer but mongo log was still quite verbose. Then, following this thread, I've omitted the whole log and it's much better in my case:

mongo:
    command: mongod --quiet --logpath /dev/null 

Answer 2

Setting logpath worked for me. It's not showing the logs output instead it's saving to the file.

    mongo:
        container_name: mongo
        image: mongo
        restart: unless-stopped
        command: 
            - '--logpath'
            - '/var/log/mongodb/mongod.log'
        ports:
            - '27017:27017'

Answer 3

An alternative MongoDB image by Bitnami offers this functionality via environment variables in compose file.

https://hub.docker.com/r/bitnami/mongodb. Explained in the section Configuring system log verbosity level