Dockerfile

FROM centos

RUN yum install -y passwd
RUN yum install -y openssh
RUN yum install -y openssh-server
RUN yum install -y openssh-clients
RUN yum install -y sudo

## Install Chef Omnibus
# RUN curl -L http://www.opscode.com/chef/install.sh | bash

## create user
RUN useradd naoya
RUN passwd -f -u naoya
RUN mkdir -p /home/naoya/.ssh; chown naoya /home/naoya/.ssh; chmod 700 /home/naoya/.ssh
ADD ./authorized_keys /home/naoya/.ssh
RUN chown naoya /home/naoya/.ssh/authorized_keys; chmod 600 /home/naoya/.ssh/authorized_keys

## setup sudoers
RUN echo "naoya    ALL=(ALL)       ALL" >> /etc/sudoers.d/naoya

## setup sshd and generate ssh-keys by init script
ADD ./sshd_config /etc/ssh/sshd_config
RUN /etc/init.d/sshd start
RUN /etc/init.d/sshd stop

## Seems we cannnot fix private public port number
EXPOSE 22
# EXPOSE 49222:22

CMD ["/usr/sbin/sshd", "-D"]