1、下載docker的安裝文件
https://download.docker.com/linux/static/stable/x86_64/
由於公司OpenStack用的docker版本是18.09.0
所以，下載的是：docker-18.09.0-ce.tgz 這個壓縮文件
2、上傳docker-18.09.0-ce.tgz 到系統，用ftp工具上傳即可
3、解壓
tar -zxvf docker-18.06.3-ce.tgz
4、將解壓出來的docker文件複製到 /usr/bin/ 目錄下
cp docker/* /usr/bin/
5、進入/etc/systemd/system/目錄,並創建docker.service文件
cd /etc/systemd/system/
vi docker.service
6、將以下內容複製進去（192.168.100.108改爲你的服務器IP）
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target
[Service]
Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by docker
ExecStart=/usr/bin/dockerd --selinux-enabled=false --insecure-registry=192.168.100.108
ExecReload=/bin/kill -s HUP $MAINPID
# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
# Uncomment TasksMax if your systemd version supports it.
# Only systemd 226 and above support this version.
#TasksMax=infinity
TimeoutStartSec=0
# set delegate yes so that systemd does not reset the cgroups of docker containers
Delegate=yes
# kill only the docker process, not all processes in the cgroup
KillMode=process
# restart the docker process if it exits prematurely
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s
[Install]
WantedBy=multi-user.target
7、給docker.service文件添加執行權限
chmod 777 /etc/systemd/system/docker.service
8、重新加載配置文件（每次有修改docker.service文件時都要重新加載下）
systemctl daemon-reload
9、啓動
systemctl start docker
10、設置開機啓動
systemctl enable docker.service
11、查看docker狀態
systemctl status docker
出現下面這個界面就代表docker安裝成功：
12、配置鏡像加速器,默認是到國外拉取鏡像速度慢,可以配置國內的鏡像如：阿里、網易等等。
下面配置一下網易的鏡像加速器。打開docker的配置文件: /etc/docker/daemon.json文件：
vi /etc/docker/daemon.json
配置如下:
{"registry-mirrors": ["http://hub-mirror.c.163.com"]}
13、保存配置並重啓docker 一定要重啓不然加速是不會生效的！！！
service docker restart
14、測試docker導入安裝鏡像
h1_01_import_images.sh
導入鏡像
查看鏡像
運行容器並進入
OK，到此沒有問題，無網環境安裝docker成功！！