新机centos8安装docker及配置docker路径流程

1：uname -r

2：yum remove docker docker-common container-selinux docker-selinux docker-engine

3：yum remove -y docker-*

4：wget http://mirrors.aliyun.com/repo/Centos-8.repo

5：cp Centos-8.repo /etc/yum.repos.d/ 

6：cd /etc/yum.repos.d/ 

7：mv CentOS-Base.repo CentOS-Base.repo.bak 

8：mv Centos-8.repo CentOS-Base.repo （区分大小写)

9：yum clean all

10：yum makecache

如果报错 

为 repo 'AppStream' 下载元数据失败
错误：为 repo 'AppStream' 下载元数据失败

先执行

mv /etc/yum.repos.d /etc/yum.repos.d.bak

mkdir -p /etc/yum.repos.d

cd /etc/yum.repos.d/
sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
sed -i 's|baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*

yum clean all 

yum makecache

curl https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo > /etc/yum.repos.d/Centos-vault-8.5.2111.repo

curl https://mirrors.aliyun.com/repo/epel-archive-8.repo > /etc/yum.repos.d/epel-archive-8.repo

yum clean all 

yum makecache

11：yum update

12：yum install -y yum-utils

13：yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

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

15：yum install docker-ce-3:18.09.9-3.el7.x86_6

如果报错：

16：yum install wget

17：wget https://download.docker.com/linux/centos/7/x86_64/edge/Packages/containerd.io-1.2.6-3.3.el7.x86_64.rpm

18：yum -y install containerd.io-1.2.6-3.3.el7.x86_64.rpm

19：yum install docker-ce-3:18.09.9-3.el7.x86_6

如果不报错

16：sudo systemctl start docker

17：sudo systemctl enable docker

18：sudo systemctl start docker

到这里 docker安装好了，修改默认装载路径

1：docker info

看里面的Doker Root Dir --现在是默认的  var/lib/docker 

2：vi /etc/docker/daemon.json 

3：

{
"registry-mirrors": ["http://hub-mirror.c.163.com"],
"data-root": "/home/docker"---自己的路径
}

4：systemctl restart docker

完成！