configure SSH server on docker CentOS base image

Dockerfile

FROM centos

RUN yum install -y sudo openssh-server openssh-clients
RUN yum install -y passwd
RUN sed -ri 's/UsePAM yes/#UsePAM yes/g' /etc/ssh/sshd_config
RUN sed -ri 's/#UsePAM no/UsePAM no/g' /etc/ssh/sshd_config

# fix for ssh connection issue
RUN ssh-keygen -b 1024 -t rsa -f /etc/ssh/ssh_host_key
RUN ssh-keygen -b 1024 -t rsa -f /etc/ssh/ssh_host_rsa_key
RUN ssh-keygen -b 1024 -t dsa -f /etc/ssh/ssh_host_dsa_key

# fix for bash: /dev/fd/X: No such file or directory
RUN ln -s /proc/self/fd /dev/fd


RUN echo -e "NEWPASS\nNEWPASS" | passwd
EXPOSE 22

ENTRYPOINT /usr/sbin/sshd -D