由于实验室机房处于内网环境，无法与外网交互，导致无法使用yum命令在线下载配置环境。因此，我在Windows环境（可连接外网）下使用Xftp6来进行个人PC机与机房服务器进行交互管理，在Windows环境中下载rpm安装包通过Xftp上传到机房Linux服务器中，然后离线安装Docker容器
安装环境：
CentOS：release 7.9.2009（Server with GUI）
Docker：19.03.13
下载离线安装包（Windows环境）：
docker安装包下载：https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-19.03.13-3.el7.x86_64.rpm
依赖包下载：
containerd.io：https://download.docker.com/linux/centos/7/x86_64/stable/Packages/containerd.io-1.3.7-3.1.el7.x86_64.rpm
docker-ce-cli：https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-cli-19.03.13-3.el7.x86_64.rpm
container-selinux：http://mirror.centos.org/altarch/7/extras/armhfp/Packages/container-selinux-2.107-3.el7.noarch.rpm
离线安装（Linux环境）：
进入存放以上安装包的文件夹，使用rpm命令依次进行安装如下：
sudo rpm -ivh docker-ce-cli-19.03.13-3.el7.x86_64.rpm
sudo rpm -ivh container-selinux-2.107-3.el7.noarch.rpm
sudo rpm -ivh containerd.io-1.3.7-3.1.el7.x86_64.rpm
sudo rpm -ivh docker-ce-19.03.13-3.el7.x86_64.rpm
效果如下：
[leeho@localhost docker]$ sudo rpm -ivh docker-ce-cli-19.03.13-3.el7.x86_64.rpm
warning: docker-ce-cli-19.03.13-3.el7.x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID 621e9f35: NOKEY
Preparing... ################################# [100%]
Updating / installing...
1:docker-ce-cli-1:19.03.13-3.el7 ################################# [100%]
[leeho@localhost docker]$ sudo rpm -ivh container-selinux-2.107-3.el7.noarch.rpm
warning: container-selinux-2.107-3.el7.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
Preparing... ################################# [100%]
Updating / installing...
1:container-selinux-2:2.107-3.el7 ################################# [100%]
[leeho@localhost docker]$ sudo rpm -ivh containerd.io-1.3.7-3.1.el7.x86_64.rpm
warning: containerd.io-1.3.7-3.1.el7.x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID 621e9f35: NOKEY
Preparing... ################################# [100%]
Updating / installing...
1:containerd.io-1.3.7-3.1.el7 ################################# [100%]
[leeho@localhost docker]$ sudo rpm -ivh docker-ce-19.03.13-3.el7.x86_64.rpm
warning: docker-ce-19.03.13-3.el7.x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID 621e9f35: NOKEY
Preparing... ################################# [100%]
Updating / installing...
1:docker-ce-3:19.03.13-3.el7 ################################# [100%]启动Docker：
# 启动Docker
systemctl start docker
# 查看状态
systemctl status docker
# 设置开机启动Docker
systemctl enable docker效果如下：
[leeho@localhost docker]$ systemctl start docker
==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units ===
Authentication is required to manage system services or units.
Authenticating as: leeho
Password:
==== AUTHENTICATION COMPLETE ===
[leeho@localhost docker]$ systemctl status docker
● docker.service - Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
Active: active (running) since Tue 2020-11-24 00:41:48 EST; 9s ago
Docs: https://docs.docker.com
Main PID: 3407 (dockerd)
Tasks: 8
Memory: 73.3M
CGroup: /system.slice/docker.service
└─3407 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
Nov 24 00:41:44 localhost.localdomain dockerd[3407]: time="2020-11-24T00:41:44.069838810-05:00" level=info msg="scheme \...=grpc
Nov 24 00:41:44 localhost.localdomain dockerd[3407]: time="2020-11-24T00:41:44.069857692-05:00" level=info msg="ccResolv...=grpc
Nov 24 00:41:44 localhost.localdomain dockerd[3407]: time="2020-11-24T00:41:44.069865185-05:00" level=info msg="ClientCo...=grpc
Nov 24 00:41:44 localhost.localdomain dockerd[3407]: time="2020-11-24T00:41:44.158585603-05:00" level=info msg="Loading ...art."
Nov 24 00:41:47 localhost.localdomain dockerd[3407]: time="2020-11-24T00:41:47.440607709-05:00" level=info msg="Default ...ress"
Nov 24 00:41:47 localhost.localdomain dockerd[3407]: time="2020-11-24T00:41:47.746815879-05:00" level=info msg="Loading ...one."
Nov 24 00:41:47 localhost.localdomain dockerd[3407]: time="2020-11-24T00:41:47.990824743-05:00" level=info msg="Docker d...03.13
Nov 24 00:41:47 localhost.localdomain dockerd[3407]: time="2020-11-24T00:41:47.991248583-05:00" level=info msg="Daemon h...tion"
Nov 24 00:41:48 localhost.localdomain dockerd[3407]: time="2020-11-24T00:41:48.062558939-05:00" level=info msg="API list...sock"
Nov 24 00:41:48 localhost.localdomain systemd[1]: Started Docker Application Container Engine.
Hint: Some lines were ellipsized, use -l to show in full.
[leeho@localhost docker]$ sudo systemctl enable docker
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.查看Docker版本：
docker version
[leeho@localhost docker]$ sudo docker version
Client: Docker Engine - Community
Version: 19.03.13
API version: 1.40
Go version: go1.13.15
Git commit: 4484c46d9d
Built: Wed Sep 16 17:03:45 2020
OS/Arch: linux/amd64
Experimental: false
Server: Docker Engine - Community
Engine:
Version: 19.03.13
API version: 1.40 (minimum version 1.12)
Go version: go1.13.15
Git commit: 4484c46d9d
Built: Wed Sep 16 17:02:21 2020
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.3.7
GitCommit: 8fba4e9a7d01810a393d5d25a3621dc101981175
runc:
Version: 1.0.0-rc10
GitCommit: dc9208a3303feef5b3839f4323d9beb36df0a9dd
docker-init:
Version: 0.18.0
GitCommit: fec3683注意！！！在用户权限下docker 命令需要加sudo 否则出现以下问题：
