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