Create docker image and sshddocker With sshd service

Create docker image and sshddocker With sshd service

Reference: https://docs.docker.com/examples/running_ssh_service/

1. Create an empty directory to store Dockerfile

Mkdir-p/home/thm/docker/test/new_image

Vim Dockerfile

The content of Dockerfile is:

 

  FROM tanghuimin0713/ubuntu_amd64:14.04  RUN apt-get update  RUN apt-get install -y openssh-server  #RUN mkdir /var/run/sshd  RUN sed -i 's/^PermitRootLogin/#PermitRootLogin/' /etc/ssh/sshd_config  RUN echo "PermitRootLogin yes" >> /etc/ssh/sshd_config  RUN echo "root:root" | chpasswd  EXPOSE 22

 

2. build a image

Docker build-t tanghuimin0713/ubuntu_amd64_ssh.

3. run a container

Docker run-d-p 2222:22 tanghuimin0713/ubuntu_amd64_ssh/usr/sbin/sshd-D

4. log on to the docker container by Using ssh under the host

Ssh root @ localhost-p 2222

Password: root

root@ubuntu:/home/thm/docker/test/new_image# ssh root@localhost -p 2222The authenticity of host '[localhost]:2222 ([127.0.0.1]:2222)' can't be established.ECDSA key fingerprint is bd:41:3f:e4:e3:bd:b4:46:54:fe:1b:46:eb:60:f3:73.Are you sure you want to continue connecting (yes/no)? yesWarning: Permanently added '[localhost]:2222' (ECDSA) to the list of known hosts.root@localhost's password: Welcome to Ubuntu 14.04 LTS (GNU/Linux 3.13.0-32-generic x86_64) * Documentation:  https://help.ubuntu.com/The programs included with the Ubuntu system are free software;the exact distribution terms for each program are described in theindividual files in /usr/share/doc/*/copyright.Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted byapplicable law.root@db36812760ac:~# 

Successful.

If you are prompted during ssh login:

 

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!Someone could be eavesdropping on you right now (man-in-the-middle attack)!It is also possible that a host key has just been changed.The fingerprint for the ECDSA key sent by the remote host isbd:41:3f:e4:e3:bd:b4:46:54:fe:1b:46:eb:60:f3:73.Please contact your system administrator.Add correct host key in /root/.ssh/known_hosts to get rid of this message.Offending ECDSA key in /root/.ssh/known_hosts:5  remove with: ssh-keygen -f "/root/.ssh/known_hosts" -R 172.17.0.2ECDSA host key for 172.17.0.2 has changed and you have requested strict checking.Host key verification failed.

 

Rm $ HOME/. ssh/known_hosts.