创建带sshd服务的docker image

时间：2022-04-25 16:48:46

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

1.
创建一个空目录用于存放Dockerfile

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

vim Dockerfile

Dockerfile的内容为：

  FROM tang*0713/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

2. build a image

docker build -t tang*0713/ubuntu_amd64_ssh .

3. run a container

docker run -d -p 2222:22 tang*0713/ubuntu_amd64_ssh /usr/sbin/sshd -D

4. 主机下ssh登陆docker容器

ssh root@localhost -p 2222

密码为：root

root@ubuntu:/home/thm/docker/test/new_image# ssh root@localhost -p

The authenticity of host '[localhost]:2222 ([127.0.0.1]:2222)' can't be established.

ECDSA key fingerprint is bd::3f:e4:e3:bd:b4:::fe:1b::eb::f3:.

Are you sure you want to continue connecting (yes/no)? yes

Warning: 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.--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 the

individual files in /usr/share/doc/*/copyright.

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by

applicable law.

root@db36812760ac:~#

成功。

若在ssh登陆时提示：

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

@    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 is

bd::3f:e4:e3:bd:b4:::fe:1b::eb::f3:.

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:

  remove with: ssh-keygen -f "/root/.ssh/known_hosts" -R 172.17.0.2

ECDSA host key for 172.17.0.2 has changed and you have requested strict checking.

Host key verification failed.

rm $HOME/.ssh/known_hosts即可。

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