Docker化已经存在的应用程序和数据库
我正在尝试Dockerize已经创build的应用程序（包括数据库）。
我有适当的文件：
- 泊坞窗，compose.yml
- dockerfile
- requirements.txt
我在数据库部分有问题 – 如何configurationdocker-compose.yml文件指向已经创build的数据库？
这就是为什么我问 – 我对Docker的理解 – 是你创build你的基本应用程序 – 然后“Dockerize”它或打包成一个你可以分发的图像。 我是一个初学者 – 所以这可能是我不理解的原因。
这是我目前的docker-compose.yml：
version: '2' services: db: image: postgres:9.6 environment: - POSTGRES_USER=postgres - POSTGRES_PASSWORD=qwerty - POSTGRES_DB=ar_db ports: - "5433:5433" web: build: . command: python2.7 manage.py runserver 0.0.0.0:8000 volumes: - .:/code ports: - "8000:8000" depends_on: - db 和dockerfile：
############################################################ # Dockerfile to run a Django-based web application # Based on an Ubuntu Image ############################################################ # Set the base image to use to Ubuntu FROM debian:8.8 # Set the file maintainer (your name - the file's author) MAINTAINER HeatherJ # Update the default application repository sources list RUN apt-get update && apt-get -y upgrade RUN apt-get install -y python python-pip libpq-dev python-dev #install git RUN apt-get update && apt-get install -y --no-install-recommends \ git&& rm -rf /var/lib/apt/lists/* # Set env variables used in this Dockerfile (add a unique prefix, such as DOCKYARD) # Local directory with project source ENV DOCKYARD_SRC=EPIC_AR # Directory in container for all project files ENV DOCKYARD_SRVHOME=/EPIC_AR # Directory in container for project source files ENV DOCKYARD_SRVPROJ=/home/epic/EPIC_AR/EPIC_AR # Create application subdirectories WORKDIR $DOCKYARD_SRVHOME RUN mkdir media static logs VOLUME ["$DOCKYARD_SRVHOME/media/", "$DOCKYARD_SRVHOME/logs/"] # Copy application source code to SRCDIR COPY $DOCKYARD_SRC $DOCKYARD_SRVPROJ # Install Python dependencies RUN pip install -r $DOCKYARD_SRVPROJ/requirements.txt # Copy entrypoint script into the image WORKDIR $DOCKYARD_SRVPROJ COPY ./docker-entrypoint.sh / ENTRYPOINT ["/docker-entrypoint.sh"]