转载至：https://www.cnblogs.com/kingsonfu/p/11576797.html

1、离线安装模式

1.1 安装包官方地址：https://download.docker.com/linux/static/stable/x86_64/

可以先下载到本地，然后通过ftp工具上传到服务器上，或者在服务器上使用命令下载 

wget https://download.docker.com/linux/static/stable/x86_64/docker-18.06.3-ce.tgz

1.2  解压

tar -zxvf docker-18.06.3-ce.tgz

1.3 将解压出来的docker文件复制到 /usr/bin/ 目录下

cp docker/* /usr/bin/

1.4 在/etc/systemd/system/目录下新增docker.service文件，内容如下，这样可以将docker注册为service服务

[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=127.0.0.1

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

此处的--insecure-registry=127.0.0.1（此处改成你私服ip）设置是针对有搭建了自己私服Harbor时允许docker进行不安全的访问，否则访问将会被拒绝。

1.5 启动docker

给docker.service文件添加执行权限

chmod+x /etc/systemd/system/docker.service

重新加载配置文件（每次有修改docker.service文件时都要重新加载下）

systemctl daemon-reload

启动

systemctl start docker

设置开机启动

systemctl enable docker.service

查看docker服务状态

systemctl status docker

看到：active（running）运行成功