Cómo crear una imagen para Docker usando un Dockerfile http://picodotdev.github.io/blog-bitix/2014/11/como-crear-una-imagen-para-docker-usando-un-dockerfile/

docker-build.sh

$ docker build -t "picodotdev/base:1.0" docker/base
$ docker build -t "picodotdev/mysql:1.0" docker/mysql

docker-run-1.sh

$ docker run --name mysql-data -d -v /var/lib/mysql busybox

docker-run-2.sh

$ docker run --name mysql -d -p 3306:3306 --volumes-from mysql-data picodotdev/mysql:1.0 /sbin/my_init
3f5774999a7850ff4c8c0512ff066daf67a6e19499113ee9f04dc2511972a163
$ docker stop 3f5774999

Dockerfile-base

FROM phusion/baseimage:0.9.15
MAINTAINER picodotdev <pico.dev@gmail.com>

ENV HOME /root

RUN apt-get update -q

RUN /etc/my_init.d/00_regen_ssh_host_keys.sh

RUN echo 'root:$6$l/PahbyY$jFhqIAuvHeK/GwjfT71p4OBBkHQpnTe2FErcUWZ8GIN1ykdI7CgL05Jkk7MYW6l.0pijAlfoifkQnLpaldEJY0' | chpasswd -e

ADD bashrc /root/.bashrc
ADD timezone /etc/timezone

EXPOSE 22

CMD ["/sbin/my_init"]

Dockerfile-mysql

FROM picodotdev/base:1.0
MAINTAINER picodotdev <pico.dev@gmail.com>

ENV HOME /root

RUN apt-get install -y mysql-server mysql-client

ADD my.cnf /etc/mysql/my.cnf
RUN mkdir /etc/service/mysql
ADD mysql /etc/service/mysql/run
RUN chmod +x /etc/service/mysql/run

RUN rm -R /var/lib/mysql && \
	mkdir /var/lib/mysql && \
    mkdir /mnt/keys

VOLUME ["/var/lib/mysql", "/mnt/keys"]

RUN apt-get clean && \
	rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

EXPOSE 22 3306

CMD ["/sbin/my_init"]