离线安装docker

• 1、docker安装包下载地址

     https://download.docker.com/linux/static/stable/x86_64/
  

• 2、将包解压后放到/usr/bin 目录下 cp docker/* /usr/bin/

• 3、设置启动文件 vim /etc/systemd/system/docker.service
  将下面的配置文件全部复制进去即可

[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
	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

• 4、设置和docker状态

  chmod +x /etc/systemd/system/docker.service #添加文件权限并启动docker
  systemctl daemon-reload #重载unit配置文件
  systemctl start docker #启动Docker
  systemctl enable docker.service #设置开机自启

• 5、测试是否安装成功

  输入 docker ps 如果不报错就成功了