Dockerfile

FROM centos:6.7
MAINTAINER Jeganathan Swaminathan <jegan@tektutor.org> <http://www.tektutor.org> 
#ENV container=docker
RUN yum -y update; yum clean all
RUN yum install -y epel-release

RUN yum install -y openssh-server openssh-clients

# Set the password of root user to root
RUN echo 'root:Tango@25' | chpasswd

RUN useradd devops
RUN echo 'devops:Tango@25' | chpasswd

RUN usermod -aG wheel root

RUN sed -ri 's/^session\s+required\s+pam_loginuid.so$/session optional pam_loginuid.so/' /etc/pam.d/sshd

# Disable root login &
# Disable password login, only allow public key. 
#COPY sshd_config /etc/ssh/sshd_config
COPY sudoers /etc/sudoers

RUN mkdir -p /root/.ssh
RUN mkdir -p /home/devops/.ssh
COPY authorized_keys /root/.ssh/authorized_keys
COPY authorized_keys /.ssh/authorized_keys
COPY authorized_keys /etc/ssh/authorized_keys
COPY authorized_keys /home/devops/.ssh/authorized_keys

# Add sshd running directory.
RUN mkdir -m 755 /var/run/sshd

#RUN /usr/bin/systemctl enable sshd.service

#CMD /usr/bin/systemctl status
# Add ssh key directory.
RUN /sbin/service sshd start && /sbin/service sshd stop

#RUN /usr/sbin/systemctl start sshd

EXPOSE 22
EXPOSE 80
CMD ["/usr/sbin/sshd", "-D"]