docker安装

curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo

yum install -y yum-utils device-mapper-persistent-data lvm2
yum makecache fast 

 yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
 # 阿里云的
 yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

yum install docker-ce -y
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
"registry-mirrors": ["https://cucmj56f.mirror.aliyuncs.com"]
}
EOF


# 镜像加速用自己的阿里云地址吧，用我的也行。

 systemctl daemon-reload
 systemctl restart docker

 docker version
 # 查看版本

可加可不加

解释

【上面做了镜像加速

vi /etc/docker/daemon.json
# 镜像加速配了 加国内镜像仓库也行
{
  "registry-mirrors": ["https://c*****.mirror.aliyuncs.com","https://hub-mirror.c.163.com"]
}
****前面的为阿里云镜像加速服务的地址

docker pull centos
docker images