创建MongoDB镜像

注解

• This example assumes you have Docker running in daemon mode. For more information please see 检测Docker安装情况.
• If you don’t like sudo then see Giving non-root access

创建 Dockerfile¶

Create an empty file called Dockerfile:

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:

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.

# 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.

# 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

# 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)

# 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 instruction for the container.

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.

sudo docker build -t <yourname>/mongodb .

Now you should be able to run mongod as a daemon and be able to connect on the local port!

# Regular style
MONGO_ID=$(sudo docker run -d <yourname>/mongodb)

# Lean and mean
MONGO_ID=$(sudo docker run -d <yourname>/mongodb --noprealloc --smallfiles)

# Check the logs out
sudo docker logs $MONGO_ID

# Connect and play around
mongo --port <port you get from `docker ps`>

Sweet!