Use the Dockerfile file to create a CentOS image with the sshd service

1. Install Docker and start Docker, not repeat

2. Create a directory using Dockerfile to install the SSHD service, name path customization

mkdir Sshd_centos

CD Sshd_centos

3. Edit the script file to start the sshd service

Vim run.sh content is

#!/bin/bash

/usr/sbin/sshd-d

4. Generate keys for host and Docker container communication

Ssh-keygen-t rsa-b 2048-f/etc/ssh/ssh_host_rsa_key

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At this point into the/etc/ssh/directory can see a series of key files,

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4, copy the file to the Sshd_centos directory, at this time in the Sshd_centos directory, the following./indicates the current path

Cp/etc/ssh/ssh_host_rsa_key./

Cp/etc/ssh/ssh_host_ecdsa_key./

Cp/etc/ssh/ssh_host_ed25519_key./

Cat/etc/ssh/ssh_host_rsa_key.pub > Authorized.keys

5, edit Dockerfile file Vim Dockerfile, the content is as follows

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#生成的镜像以centos为基础镜像

From CentOS

#开发者信息及其他

Maintainer by test

#升级系统

RUN yum-y Update

#安装openssh-server

RUN Yum install-y openssh-server

#修改ssh_config

RUN sed-i ' s/usepam yes/usepam no/g '/etc/ssh/sshd_config

#将密钥文件复制到 the/etc/ssh directory

ADD Ssh_host_rsa_key/etc/ssh/ssh_host_rsa_key

RUN chmod 600/etc/ssh/ssh_host_rsa_key

ADD ssh_host_rsa_key.pub/etc/ssh/ssh_host_rsa_key.pub

ADD Ssh_host_ed25519_key/etc/ssh/ssh_host_ed25519_key

RUN chmod 600/etc/ssh/ssh_host_ed25519_key

ADD Ssh_host_ecdsa_key/etc/ssh/ssh_host_ecdsa_key

RUN chmod 600/etc/ssh/ssh_host_ecdsa_key

RUN mkdir-p/root/.ssh

ADD Authorized_keys/root/.ssh/authorized_keys

#将ssh服务启动脚本复制到 the/usr/local/sbin directory, and attach Execute permissions

ADD run.sh/usr/local/sbin/run.sh

RUN chmod 755/usr/local/sbin/run.sh

#变更root密码

RUN echo "root:111111" |chpasswd

#开启22端口

EXPOSE 22

#运行脚本, start the SSH service

CMD ["/usr/local/sbin/run.sh"]

Save exit to view files in the Sshd_centos directory

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6. Generate Image files

Docker build-t Sshd:dockerfile.

Note:-T is followed by a custom container name, and finally a point. Represents the Dockerfile file in the current directory

Have information generated

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finally see

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Indicates that the build image was successful

Available Docker images view

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7. Run the image generation container

Docker run-d-P 10022:22 sshd:dockerfile

Docker PS View Container

8, in the terminal use SSH host IP 10022 can login

Another: If you cannot log in, use Docker logs container ID to view the log

This article is from the "Tea Incense" blog, please be sure to keep this source http://chinawu.blog.51cto.com/10692884/1827787

Use the Dockerfile file to create a CentOS image with the sshd service