Dockerfile

FROM ubuntu:16.04  # package RUN apt-get update; apt-get -y install ssh COPY ssh_config /etc/ssh/ssh_config  # ssh RUN sed -i 's/UsePAM yes/UsePAM no/g' /etc/ssh/sshd_config && sed -i 's/PermitRootLogin without-password/PermitRootLogin yes/g' /etc/ssh/sshd_config RUN echo "root:root" | chpasswd RUN echo "root   ALL=(ALL)       ALL" >> /etc/sudoers RUN ssh-keygen -t rsa -f ~/.ssh/id_rsa -P '' && \     cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys RUN mkdir /var/run/sshd EXPOSE 22  CMD [ "sh", "-c", "service ssh start && bash"] 

生成镜像

docker build -t sshimage ./ 

验证ssh互信

　　启动第一个docker容器，然后会进入bash，执行hostname -i来获取ip。

# docker run --rm -it sshimage root@cbdf1f5e7e0f:/# hostname -i 172.17.0.4 

　　再启动另一个容器，并执行ssh $ip。

# docker run --rm -it sshimage  * Starting OpenBSD Secure Shell server sshd                             [ OK ]  root@ecaa455762df:/# ssh 172.17.0.4 Warning: Permanently added '172.17.0.4' (ECDSA) to the list of known hosts. root@cbdf1f5e7e0f:~# hostname -i 172.17.0.4 

　　可以看到，ssh成功。