在 hos 上创建具有本地存储的 mongo docker 容器

Question

I want to run mongo db in docker container. I've pulled image and run it. So it seems work ok.

But every time I start it the DB is overwritten so I loose any changes. So I want to want to map somehow internal container storage on my local host folder.

Should I write Dockerfile or/and docker-compose.yaml? I suppose this is simple question but being new in docker I can't understand what to read to get full understanding.

Answer 1

You do not need to write Dockerfile and make thing complex, just use offical image as mentioned in command or compose file.

You can use both options either docker run or docker-compose but the path should be correct in mapping to keep data persistent.

Here is way

• Create a data directory on a suitable volume on your host system, eg /my/own/datadir .

Start your mongo container like this:

$ docker run --name some-mongo -v /my/own/datadir:/data/db -d mongo

The -v /my/own/datadir:/data/db part of the command mounts the /my/own/datadir directory from the underlying host system as /data/db inside the container, where MongoDB by default will write its data files.

mongo docker volume

with docker-compose

version: "2"
services:
 mongo:
   image: mongo:latest
   restart: always
   ports:
     - "27017:27017"
   environment:
     - MONGO_INITDB_DATABASE=pastime
     - MONGO_INITDB_ROOT_USERNAME=root
     - MONGO_INITDB_ROOT_PASSWORD=root_password
   volumes:
     - /my/own/datadir:/data/db