[root@localhost ~]# yum install -y yum-utils device-mapper-persistent-data lvm2

[root@localhost ~]# yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

[root@localhost ~]# yum install -y docker-ce

[root@localhost ~]# systemctl stop firewalld.service
[root@localhost ~]# setenforce 0
[root@localhost ~]#

[root@localhost ~]# systemctl start docker.service
[root@localhost ~]# systemctl enable docker.service
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.
[root@localhost ~]#

[root@localhost ~]# cd /etc/docker/  ##如果没有该目录，需手动创建
[root@localhost docker]# ls
key.json
[root@localhost docker]# tee /etc/docker/daemon.json <<-'EOF'  ##配置镜像加速
> {
>  "registry-mirrors": ["https://******.******.aliyuncs.com"]
> }
> EOF
{
 "registry-mirrors": ["https://******.*******.aliyuncs.com"]
}
[root@localhost docker]# ls
daemon.json key.json
[root@localhost docker]# systemctl daemon-reload  ##重载守护进程
[root@localhost docker]# systemctl restart docker  ##重启docker
[root@localhost docker]#

[root@localhost docker]# echo "net.ipv4.ip_forward=1"  /etc/sysctl.conf
[root@localhost docker]# sysctl -p  ##加载配置
net.ipv4.ip_forward = 1
[root@localhost docker]#