个人测试用
1.Dockerfile

FROM centos:latest
MAINTAINER  becivells <becivells@gmail.com>

RUN yum -y update && yum install -y  epel-release  
RUN yum install -y  supervisor screen net-tools iftop openssl openssh-server nc 
#RUN yum groupinstall 'development tools'

RUN  mkdir -p /var/log/supervisor    &&\
     mkdir -p /etc/supervisord.d/    

RUN  mkdir -p /var/run/sshd          &&\
     useradd  -s /bin/bash -m user   &&\
     echo "user:123456" | chpasswd   &&\
     echo "root:123456" | chpasswd   &&\
     sed -i "s/PermitRootLogin.*/PermitRootLogin no/g" /etc/ssh/sshd_config &&\
     mkdir -p /home/user/.ssh/ &&\
     ssh-keygen -f /etc/ssh/ssh_host_rsa_key -N '' -t rsa &&\
     ssh-keygen -f /etc/ssh/ssh_host_ecdsa_key -N '' -t ecdsa &&\
     ssh-keygen -f /etc/ssh/ssh_host_ed25519_key -N '' -t ed25519

#COPY id_rsa.pub /home/user/.ssh/authorized_keys
COPY supervisord.conf  /etc/supervisord.conf
COPY sshd.conf  /etc/supervisord.d/sshd.conf
COPY sshd_config /etc/ssh/sshd_config


RUN chown user:user -R /home/user/ &&\
    chmod 600 /home/user/.ssh/authorized_keys

EXPOSE 22

CMD ["/usr/bin/supervisord","-c","/etc/supervisord.conf"]

2.sshd.conf

[program:sshd]
command=/usr/sbin/sshd -D
autostart = true
autorestart=true
redirect_stderr=true
stdout_logfile=/dev/stdout
stdout_logfile_maxbytes=0

3.supervisord.conf

[unix_http_server]
file=/var/run/supervisor/supervisor.sock   

[supervisord]
nodaemon=true
logfile=/var/log/supervisor/supervisord.log 
logfile_maxbytes=50MB
logfile_backups=10
loglevel=info
pidfile=/var/run/supervisord.pid

[supervisorctl]
serverurl=unix:///var/run/supervisor/supervisor.sock 

[rpcinterface:supervisor]
supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface 

[include]
files = supervisord.d/*.conf

4.sshd_config

Port 22
Protocol 2
HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_ecdsa_key
HostKey /etc/ssh/ssh_host_ed25519_key
SyslogFacility AUTHPRIV
PermitRootLogin no
PubkeyAuthentication yes
AuthorizedKeysFile      .ssh/authorized_keys
PasswordAuthentication yes
ChallengeResponseAuthentication no
GSSAPIAuthentication yes
GSSAPICleanupCredentials no
UsePAM yes
X11Forwarding yes
UsePrivilegeSeparation sandbox
AcceptEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES
AcceptEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT
AcceptEnv LC_IDENTIFICATION LC_ALL LANGUAGE
AcceptEnv XMODIFIERS
Subsystem       sftp    /usr/libexec/openssh/sftp-server