1.環境：
Linux version 3.10.0-957.12.2.el7.x86_64 (mockbuild@kbuilder.bsys.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC) ) #1 SMP Tue May 14 21:24:32 UTC 2019
2.Docker版本18.06.1下載地址：
百度網盤鏈接：https://pan.baidu.com/s/1eFHjd7dl5EziaVULYLcMQQ 提取碼：ofo7
wget https://download.docker.com/linux/static/stable/x86_64/docker-18.06.1-ce.tgz
3.解壓：
tar -xvf docker-18.06.1-ce.tgz
4.將解壓出來的docker文件內容移動到 /usr/bin/ 目錄下
cp docker/* /usr/bin/
5.將docker注冊為service
vim /etc/systemd/system/docker.service
[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
6.授權啟動
chmod +x /etc/systemd/system/docker.service #添加文件權限並啟動docker
systemctl daemon-reload #重新加載配置文件
systemctl start docker #啟動Docker
systemctl enable docker.service #設置開機自啟
7.驗證
systemctl status docker #查看Docker狀態
docker -v #查看Docker版本