Dockerized SSH service, built on top of official centos7 images.
openssh-server
root login enabled
exposed port 22
default command: /usr/sbin/sshd -D
root password: p@ssw0rd99
$ sudo docker run -d -P --name my_sshd yumin9822/centos7-sshd:latest
$ sudo docker port my_sshd
22/tcp -> 0.0.0.0:32771