尝试连接Docker容器时出错：系统正在启动

Question

我正在尝试构建映像并将容器作为ssh服务器运行。我希望能够从另一个容器（jenkins / jenkins）SSH这个容器（remote_host）

我正在使用带有Centos的VM。

我正在使用此docker文件。我从VM主机（也是Centos）运行它

FROM centos

RUN yum -y install openssh-server openssh-clients

RUN useradd -ms /bin/bash remote_user && \
  echo 'remote_user:12345' | chpasswd && \
  mkdir /home/remote_user/.ssh && \
  chmod 700 /home/remote_user/.ssh

COPY remote-key.pub /home/remote_user/.ssh/authorized_keys

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

EXPOSE 22
RUN /usr/bin/ssh-keygen -A
CMD ["/usr/sbin/sshd", "-D"]

我的docker撰写文件

---
networks:
  net: ~
services:
  jenkins:
    container_name: jenkins
    image: jenkins/jenkins
    networks:
      - net
    ports:
      - "8080:8080"
    volumes:
      - "$PWD/jenkins_home:/var/jenkins_home"
  remote_host:
    container_name: remote-host
    image: remote-host
    build:
      context: centos7
    networks:
      - net
version: "3"

我从主机上运行docker-compose build

Building remote_host
Step 1/8 : FROM centos
 ---> 0f3e07c0138f
Step 2/8 : RUN yum -y install openssh-server openssh-clients
 ---> Using cache
 ---> 277411f7cc41
Step 3/8 : RUN useradd -ms /bin/bash remote_user &&   echo 'remote_user:12345' | chpasswd &&   mkdir /home/remote_user/.ssh &&   chmod 700 /home/remote_user/.ssh
 ---> Using cache
 ---> c42b15de9da7
Step 4/8 : COPY remote-key.pub /home/remote_user/.ssh/authorized_keys
 ---> Using cache
 ---> f205521e83cb
Step 5/8 : RUN chown remote_user:remote_user -R /home/remote_user/.ssh &&     chmod 600 /home/remote_user/.ssh/authorized_keys
 ---> Using cache
 ---> a7bb438b87ed
Step 6/8 : EXPOSE 22
 ---> Using cache
 ---> 7f28ef8e4ec9
Step 7/8 : RUN /usr/bin/ssh-keygen -A
 ---> Using cache
 ---> a4fae9730627
Step 8/8 : CMD ["/usr/sbin/sshd", "-D"]
 ---> Using cache
 ---> 3fe69c9789a6
Successfully built 3fe69c9789a6
Successfully tagged remote-host:latest

然后我运行docker-compose up -d

docker ps给我：

0f9987444fcf        remote-host         "/usr/sbin/sshd -D"      28 minutes ago      Up 16 minutes       22/tcp                              remote-host
4c9ba830f419        jenkins/jenkins     "/sbin/tini -- /usr/…"   7 hours ago         Up 7 hours          0.0.0.0:8080->8080/tcp, 50000/tcp   jenkins 

我用我的第一个容器：

docker exec -it jenkins bash

然后，当我尝试从第一个容器切入第二个容器时

ssh remote_user@remote_host

我收到此错误

Are you sure you want to continue connecting (yes/no)?
remote_user@remote_host's password:12345
"System is booting up. Unprivileged users are not permitted to log in yet. Please come back later. For technical details, see pam_nologin(8)."
Authentication failed.

Answer 1

解决方案：

请像这样编辑您的dockerfile：

FROM centos
RUN yum -y install openssh-server
RUN useradd remote_user && \
    echo remote_user:1234 | chpasswd && \
    mkdir /home/remote_user/.ssh && \
    chmod 700 /home/remote_user/.ssh
COPY remote-key.pub /home/remote_user/.ssh/authorized_keys
RUN chown remote_user:remote_user -R /home/remote_user/.ssh && \
    chmod 600 /home/remote_user/.ssh/authorized_keys
RUN /usr/bin/ssh-keygen -A
EXPOSE 22
RUN rm -rf /run/nologin
CMD /usr/sbin/sshd -D