:title: Building a Docker Image with MongoDB :description: How to build a Docker image with MongoDB pre-installed :keywords: docker, example, package installation, networking, mongodb .. _mongodb_image: Building an Image with MongoDB ============================== .. include:: example_header.inc The goal of this example is to show how you can build your own docker images with MongoDB preinstalled. We will do that by constructing a Dockerfile that downloads a base image, adds an apt source and installs the database software on Ubuntu. Creating a ``Dockerfile`` +++++++++++++++++++++++++ Create an empty file called ``Dockerfile``: .. code-block:: bash touch Dockerfile Next, define the parent image you want to use to build your own image on top of. Here, we’ll use `Ubuntu `_ (tag: ``latest``) available on the `docker index `_: .. code-block:: bash FROM ubuntu:latest Since we want to be running the latest version of MongoDB we'll need to add the 10gen repo to our apt sources list. .. code-block:: bash # Add 10gen official apt source to the sources list RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10 RUN echo 'deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen' | tee /etc/apt/sources.list.d/10gen.list Then, we don't want Ubuntu to complain about init not being available so we'll divert /sbin/initctl to /bin/true so it thinks everything is working. .. code-block:: bash # Hack for initctl not being available in Ubuntu RUN dpkg-divert --local --rename --add /sbin/initctl RUN ln -s /bin/true /sbin/initctl Afterwards we'll be able to update our apt repositories and install MongoDB .. code-block:: bash # Install MongoDB RUN apt-get update RUN apt-get install mongodb-10gen To run MongoDB we'll have to create the default data directory (because we want it to run without needing to provide a special configuration file) .. code-block:: bash # Create the MongoDB data directory RUN mkdir -p /data/db Finally, we'll expose the standard port that MongoDB runs on (27107) as well as define an ENTRYPOINT for the container. .. code-block:: bash EXPOSE 27017 ENTRYPOINT ["usr/bin/mongod"] Now, lets build the image which will go through the ``Dockerfile`` we made and run all of the commands. .. code-block:: bash docker build -t /mongodb . Now you should be able to run ``mongod`` as a daemon and be able to connect on the local port! .. code-block:: bash # Regular style MONGO_ID=$(docker run -d /mongodb) # Lean and mean MONGO_ID=$(docker run -d /mongodb --noprealloc --smallfiles) # Check the logs out docker logs $MONGO_ID # Connect and play around mongo --port Sweet!