sshでログインできるDockerfile

Dockerfile

FROM centos

MAINTAINER myaaaaa

#Install Packages
RUN yum update -y
RUN yum install -y passwd openssh openssh-server openssh-clients sudo

# Root password
RUN echo "root:rootroot" | chpasswd

## Create user
RUN useradd docker
RUN passwd -f -u docker

## Set up SSH
RUN mkdir -p /home/docker/.ssh; chown docker /home/docker/.ssh; chmod 700 /home/docker/.ssh
ADD  authorized_keys /home/docker/.ssh/authorized_keys

RUN chown docker /home/docker/.ssh/authorized_keys
RUN chmod 600 /home/docker/.ssh/authorized_keys

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

## Set up SSHD config
RUN sed -ri 's/#PermitRootLogin yes/PermitRootLogin yes/g' /etc/ssh/sshd_config
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

## Init SSHD
RUN /etc/init.d/sshd start
RUN /etc/init.d/sshd stop

docker run -d -p 22 centos:sshd /usr/sbin/sshd -D

docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
bf3e22a79057 centos:sshd /usr/sbin/sshd -D 4 seconds ago Up 3 seconds 0.0.0.0:49153->22/tcp elegant_franklin

ssh docker@localhost -p 49153