building images from dockerfiles
DESCRIPTION
TRANSCRIPT
Building Images from Dockerfiles Tyler Brock
@tylerbrock
FROM - specify base image FROM <image> Or FROM <image>:<tag>
FROM ubuntu FROM ubuntu:latest FROM ubuntu:precise (LTS)
ADD - copy a file ADD <src> <dest>
ADD myhax.rb /folder/for/hax/hax.rb
ENV - set the mood ENV <key> <value>
ENV AWS-KEY ACBD123123EFECBD
RUN - get shit done RUN <command>
RUN apt-get install htop
CMD - what should it do? ● CMD ["executable","param1","param2"] (like an exec,
preferred form) ● CMD ["param1","param2"] (as default parameters to
ENTRYPOINT) ● CMD command param1 param2 (as a shell)
ENTRYPOINT - start here ENTRYPOINT ["executable", "param1", "param2"] (like an
exec, preferred form) ENTRYPOINT command param1 param2 (as a shell)
ENTRYPOINT wc -l -
CMD ["-l", "-"] ENTRYPOINT ["/usr/bin/wc"]
EXPOSE - connect here EXPOSE <port> [<port>...]
EXPOSE 80
VOLUME VOLUME ["/data"]
The VOLUME instruction will add one or more new volumes to any container created from the image.
Puts /data here: /var/lib/docker/volumes/
Dockerfile - the main event # What image are we using?
FROM ubuntu
# Take some credit
MAINTAINER Tyler Brock, [email protected]
# 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
# Hack for initctl not being available in Ubuntu
RUN dpkg-divert --local --rename --add /sbin/initctl
RUN ln -s /bin/true /sbin/initctl
# Install MongoDB
RUN apt-get update
RUN apt-get install mongodb-10gen
# Install a sensible config
ADD mongod.conf /etc/mongod.conf
# Setup the image as an executable that runs MongoDB
CMD ["--config", "/etc/mongod.conf"]
ENTRYPOINT ["/usr/bin/mongod"]
EXPOSE 27017
Build, Run, Enjoy docker build -t <repo/image name> /path/to/dockerfiledir
docker build -t tbrock/mongodb .
docker -d -v <host>:<container> <image/tag>
docker run -d -v /home/ubuntu/data: /data tbrock/mongodb