atxiaoming/ssh-centos repository overview

FROM centos:centos7.9.2009

RUN yum install -y openssh openssh-server openssh-clients
RUN yum install -y vim python tree net-tools bash-completion
RUN mkdir -p /var/run/sshd
RUN ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key
RUN ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key
RUN /bin/echo 'root:123456' |chpasswd

# 将key生成在指定文件内
RUN rm -fr /etc/ssh/ssh_host_rsa_key
RUN ssh-keygen -q -t rsa -b 2048 -f /etc/ssh/ssh_host_rsa_key -P '' -N ''

# 配置ssh可以使用root登陆
RUN sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config

# 时区 
RUN rm -fr /etc/localtime && cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && echo 'Asia/Shanghai' >/etc/timezone

# 开放22端口
EXPOSE 22
# 系统服务
ENTRYPOINT [ "/usr/sbin/init"]

REPOSITORY               TAG       IMAGE ID       CREATED          SIZE
ssh-ubuntu               20.04     5fdf944573df   33 seconds ago   284MB

CONTAINER ID   IMAGE                           COMMAND            CREATED         STATUS         PORTS                                                                                            NAMES
c220e8a272b7   ssh-centos:7.9                "/usr/sbin/init"   5 seconds ago   Up 4 seconds   0.0.0.0:222->22/tcp, :::222->22/tcp                                                              ssh-ubuntu 

# 查看服务状态
docker exec -it ssh-centos bash
[root@817a8e98c5c0 /]# systemctl status sshd
● sshd.service - OpenSSH server daemon
   Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: enabled)
   Active: active (running) since Fri 2023-03-17 14:37:22 UTC; 18s ago
     Docs: man:sshd(8)
           man:sshd_config(5)
 Main PID: 78 (sshd)
   CGroup: /docker/817a8e98c5c0f1d657cb1f9a18a1ea86379339d8a72ddd9e89c5f9b29dcfa1c7/system.slice/sshd.service
           └─78 /usr/sbin/sshd -D
           ‣ 78 /usr/sbin/sshd -D

Mar 17 14:37:22 817a8e98c5c0 systemd[1]: Starting OpenSSH server daemon...
Mar 17 14:37:22 817a8e98c5c0 sshd[78]: Server listening on 0.0.0.0 port 22.
Mar 17 14:37:22 817a8e98c5c0 sshd[78]: Server listening on :: port 22.
Mar 17 14:37:22 817a8e98c5c0 systemd[1]: Started OpenSSH server daemon.

tmp ansible_ssh_host=ud1  ansible_ssh_port=2222 ansible_ssh_pass='123456'