uname -a
// Linux dlserver 4.15.0-33-generic #36~16.04.1-Ubuntu SMP Wed Aug 15 17:21:05 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

sudo grep device-mapper /proc/devices
或者使用:  ls -l /sys/class/misc/device-mapper
// 253 device-mapper

sudo apt-get install -y apt-transport-https ca-certificates curl software-properties-common

sudo apt-get remove docker docker-engine docker-ce docker.io

sudo apt-get install docker.io
source/etc/bash_ completion.d/docker.io

apt-get update
apt-get install -y apt-transport-https ##检查APT的HTPS支持查看/usT/ib/apt/methods/htps文件是否存在,如果不存在，运行安装命令
echo deb htps://get.docker.com/ubuntu docker main > /etc/apt/sources.list.d/docker.list
##添加仓库key
apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 36A1D7869245C8950F966E92D8576A8BA88D21E9
##安装
apt-get update
apt-get install -y lxc-docker

sudo apt-get install -y curl  #安装curl(Ubuntu默认没安装curl)
curl -sSL https://get.docker.com/ubuntu/ | sudo sh

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

sudo apt-get update

apt-cache madison docker-ce

curl -sSL https://get.daocloud.io/docker | sh

sudo apt-get update

sudo apt-get install -y docker-ce=版本号

sudo apt-get install -y docker-ce
或者
sudo apt-get install -y docker.io

docker info

Client:
 Debug Mode: false

Server:
 Containers: 4
  Running: 0
  Paused: 0
  Stopped: 4
 Images: 9
 Server Version: 19.03.2
 Storage Driver: overlay
  Backing Filesystem: extfs
  Supports d_type: true
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: inactive
 Runtimes: runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 894b81a4b802e4eb2a91d1ce216b8817763c29fb
 runc version: 425e105d5a03fabd737a126ad93d62a9eeede87f
 init version: fec3683
 Security Options:
  apparmor
  seccomp
   Profile: default
 Kernel Version: 4.4.0-116-generic
 Operating System: Ubuntu 16.04.4 LTS
 OSType: linux
 Architecture: x86_64
 CPUs: 1
 Total Memory: 1.953GiB
 Name: ubuntu
 ID: OXMT:BOKA:XD3R:J4LU:PTIC:USC5:2EKK:LUWZ:DEHH:337U:2XA2:2NJC
 Docker Root Dir: /data
 Debug Mode: false
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Registry Mirrors:
  http://f1361db2.m.daocloud.io/
  https://docker.mirrors.ustc.edu.cn/
 Live Restore Enabled: false

WARNING: No swap limit support
WARNING: the overlay storage-driver is deprecated, and will be removed in a future release.

sudo service docker stop

cd /etc/systemd/system/docker.service.d
如果没有docker.service.d 则创建这个路径:
cd /etc/systemd/system/
mkdir docker.service.d

sudo vim docker-overlay.conf
如果没有则创建这个文件 touch docker-overlay.conf

[Service]
ExecStart=
ExecStart=/usr/bin/dockerd --graph="新的存储路径" --storage-driver=overlay

systemctl daemon-reload
sudo service docker start

sudo docker info
若是没有成功,在下面添加一行 EnvironmentFile=-/etc/default/docker
然后运行
systemctl unmask docker.service
systemctl unmask docker.socket
systemctl start docker.service
重启docker试试

cd /etc/systemd/system/docker.service.d
sudo vim docker-overlay.conf

添加一行:
    EnvironmentFile=-/etc/default/docker

curl -sSL https://get.daocloud.io/daotools/set_mirror.sh | sh -s http://f1361db2.m.daocloud.io

vim /etc/default/docker
添加一行
DOCKER_OPTS=" --registry-mirror=http://f1361db2.m.daocloud.io "
保存,刷新文件
systemctl daemon-reload
sudo service docker restart

sudo groupadd docker  ##添加名为docker的用户
sudo gpasswd -a ${用户} docker  ##若是docker存在,添加用户  例如sudo gpasswd -a jkxy docker
sudo service docker restart  ##重启docker服务
然后需要重启Ubuntu环境