centos安装Docker

***注意事项centos的内核要在3.10以上***

1.准备yum源docker源

curl -o /etc/yum.repos.d/docker-ce.repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
curl -o /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo

2.加载yum缓存

yum clean all && yum makecache

3.可以查看docker文件

yum list docker-ce --showduplicates | sort -r

4.yum安装docker-ce指定版本

yum -y install docker-ce-20.10.6 

5.准备docker镜像加速器

mkdir  -p /etc/docker

touch /etc/docker/daemon.json
vi /etc/docker/daemon.json
{
  "registry-mirrors" : [
    "https://8xpk5wnt.mirrir.aliyuncs.com"
   ]
}

6.加载文件

systemctl daemon-reload

7.启动docker

systemctl enable docker
systemctl start docker

8.查看docker

 ps -ef |grep docker

9.查看docker信息

 ps -ef |grep docker