Access redis database in docker compose - docker

Question

I have a Django app that I want to move to docker. A redis dump.rdb file is in the root directory of the project, and contains data needed for the app to work. I normally start that by running redis-server while in the same directory. How can I move this configuration to docker? I know I can use volumes and suspect I need to mount my code folder as one, but will that cause other issues? Here is my current docker setup:
Dockerfile
FROM python:2.7.14
ENV PYTHONUNBUFFERED 1
RUN mkdir /code
WORKDIR /code
ADD . /code/
ADD requirements /requirements
RUN pip install -r /requirements/local.txt
docker-compose.yml
version: '3'
services:
db:
image: postgres:9.6.3
expose:
- "5432"
volumes:
- pgdata:/var/lib/postgresql/data
redis:
image: redis:3.2.6
expose:
- "6379"
volumes:
- ./code
redis_cache:
image: redis:3.2.6
expose:
- "6379"
elasticsearch:
image: elasticsearch:5.6.6
expose:
- "9200"
web:
build: .
command: python manage.py runserver 0.0.0.0:8000
ports:
- "8000:8000"
environment:
- DATABASE_URL=postgresql://postgres#db/postgres
- ENVIRONMENT=development
- REDIS_URL=redis://redis:6379
- REDIS_CACHE_URL=redis://redis_cache:6379
- ELASTIC_ENDPOINT=elasticsearch:9200
env_file: docker.env
depends_on:
- db
- redis
- elasticsearch
volumes:
- .:/code
volumes:
pgdata: {}

Answer 1

There are several ways. What do you need to prefer depends on your project and what kind of information stored in dump.rds file.
you can create your custom redis image with dump.rds file inside. Then you need to push it to your repository.
You can, as you mention above, mount volume from source code. But I prefer mount not whole code directory but mount only redis directory which stores data intended for Redis.
Also, you can create some migration script in web container. It may create some data in redis container as well as in db container.