这篇文章主要介绍了怎么用Dockerfile构建SSH Server，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。
mkdir y109-sshd vim Dockerfile
# docker sshd FROM ubuntu:14.04 MAINTAINER y109<y109@qq.com> # 使用 163.com 的源 COPY sources.list.163.txt /etc/apt/sources.list RUN apt-get -y update # 设置 root 密码 RUN echo 'root:bMg5kesfdsfesx9gD' | chpasswd # 安装 openssh-server RUN apt-get -y install openssh-server RUN mkdir /var/run/sshd # SSH login fix. Otherwise user is kicked off after login RUN sed 's@session\s*required\s*pam_loginuid.so@session optional pam_loginuid.so@g' -i /etc/pam.d/sshd # # ENV NOTVISIBLE "in users profile" RUN echo "export VISIBLE=now" >> /etc/profile # 添加公钥(如果没有公钥可以省略) RUN mkdir /root/.ssh RUN echo 'ssh-rsa YOU_PUB_KEY' > /root/authorized_keys # 容器启动后运行的程序 CMD ["/usr/sbin/sshd", "-D"] # 打开 22 端口 EXPOSE 22
sources.list.163.txt 的内容如下
deb http://mirrors.163.com/ubuntu/ precise main restricted deb-src http://mirrors.163.com/ubuntu/ precise main restricted deb http://mirrors.163.com/ubuntu/ precise-updates main restricted deb-src http://mirrors.163.com/ubuntu/ precise-updates main restricted deb http://mirrors.163.com/ubuntu/ precise universe deb-src http://mirrors.163.com/ubuntu/ precise universe deb http://mirrors.163.com/ubuntu/ precise-updates universe deb-src http://mirrors.163.com/ubuntu/ precise-updates universe deb http://mirrors.163.com/ubuntu/ precise-security main restricted deb-src http://mirrors.163.com/ubuntu/ precise-security main restricted deb http://mirrors.163.com/ubuntu/ precise-security universe deb-src http://mirrors.163.com/ubuntu/ precise-security universe
使用 docker build 来生成镜像
-t 参数是给这个镜像的 TAG
sudo docker build -t 'y109/sshd' ./ Sending build context to Docker daemon 4.608 kB Sending build context to Docker daemon Step 0 : FROM ubuntu:14.04 ---> 9cbaf023786c Step 1 : MAINTAINER y109<y109@qq.com> ---> Using cache ---> 2256ab1cc931 Step 2 : COPY sources.list.163.txt /etc/apt/sources.list ---> Using cache ---> 65536ca26964 Step 3 : RUN apt-get -y update ---> Using cache ---> 60639e42f098 Step 4 : RUN echo 'root:pass123456' | chpasswd ---> Using cache ---> 8644dd20854f Step 5 : RUN apt-get -y install openssh-server ---> Using cache ---> 98039327bca7 Step 6 : RUN mkdir /var/run/sshd ---> Using cache ---> 9bd3b3fc7828 Step 7 : RUN sed 's@session\s*required\s*pam_loginuid.so@session optional pam_loginuid.so@g' -i /etc/pam.d/sshd ---> Using cache ---> d748cb9428a0 Step 8 : RUN echo "export VISIBLE=now" >> /etc/profile ---> Using cache ---> e975cd819243 Step 9 : RUN mkdir /root/.ssh ---> Using cache ---> e561acc07675 Step 10 : RUN echo 'ssh-rsa YOU_PUBLIC_KEY' ---> Using cache ---> 8f6882a72037 Step 11 : CMD ["/usr/sbin/sshd", "-D"] ---> Using cache ---> 48cbd2c4aa70 Step 12 : EXPOSE 22 ---> Using cache ---> 3101a36f0084 Successfully built 3101a36f0084
使用 docker images 命令查看镜像, 确认镜像构建成功了
sudo docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE y109/sshd latest 3101a36f0084 22 minutes ago 226.1 MB <none> <none> 23f604e547b8 28 minutes ago 226.1 MB <none> <none> 50647a1fb746 36 minutes ago 226.1 MB y ...
y109/sshd就是我们刚才构建的镜像
使用 docker run 来用镜像创建一个 Container
-d : Detached mode, 使 Container 在 background 模式运行 -p : 把 22 端口映射到主机的网卡上, 格式: ip:hostPort:containerPort | ip::containerPort | hostPort:containerPort –name : 给 Container 指定一个名字, 一旦指定了名称这个名称就和这个 Container 绑定了, 可以用 docker ps -a 列出来
sudo docker run -d -p 10922:22 --name y109-sshd y109/sshd
我用的外网端口是 10922, 可以根据需要修改, 下一步需要确认 Container 是否正常执行了
sudo docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES fc37b83d343e y109/sshd:latest "/usr/sbin/sshd -D" 9 seconds ago Up 9 seconds 0.0.0.0:10922->22/tcp y109-sshd
看来执行成功了, 连接试试看看
ssh root@localhost -p10922 The authenticity of host '[localhost]:10922 ([127.0.0.1]:10922)' can't be established. ECDSA key fingerprint is 4d:48:5c:61:54:d6:8f:62:70:a2:0e:ab:b7:1a:cb:f7. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '[localhost]:10922' (ECDSA) to the list of known hosts. 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@80f07ad418fe:~#
已经成功连接进入 Container 了
sudo docker stop fc3 fc3 是 Container Id fc37b83d343e 的缩写, 只要能够唯一标识这个 Container 就可以了。或者sudo docker stop y109-sshd
sudo docker start y109-sshd
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