1. 准备工作

mkdir ubuntu
cd ubuntu
touch Dockerfile run.sh sources.list authorized_keys

Dockerfile

FROM ubuntu:14.04

MAINTAINER rolex

RUN rm /etc/apt/sources.list

ADD sources.list /etc/apt/sources.list

RUN apt-get update



RUN sudo apt-get install -y openssh-server
RUN mkdir -p /var/run/sshd
RUN mkdir -p /root/.ssh

RUN sed -ri 's/session required pam_loginuid.so/#session required pam_loginuid.so/g' /etc/pam.d/sshd

ADD authorized_keys /root/.ssh/authorized_keys
ADD run.sh /run.sh
RUN chmod 755 /run.sh

RUN groupadd dockerone
RUN useradd -g dockerone dockerone
RUN echo "dockerone:dockerone" | chpasswd

RUN echo "root:dockerone" | chpasswd

EXPOSE 22

CMD ["/run.sh"]

run.sh

#!/bin/bash

/usr/sbin/sshd -D

sources.list

deb http://mirrors.163.com/ubuntu/ trusty main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ trusty-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ trusty-backports main restricted universe multiverse

authorized_keys

ssh-keygen -t rsa
cat ~/.ssh/id_rsa.pub > authorized_keys

2. 创建镜像

sudo docker build -t ubuntu_14.04 .

3. 测试

sudo docker run -d -p 10122:22 ubuntu_14.04

ssh dockerone@localhost -p 10122