5.1、深度剖析 docker run 命令：原理阐释与数据持久化实践探究

1、更换国内yum源

yum -y install wget yum-utils epel-release
mv  /etc/yum.repos.d/CentOS-Base.repo  /etc/yum.repos.d/CentOS-Base.repo.bak

curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
curl -o /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
或
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo

yum clean all && yum makecache

2、更换国内docker源

curl -o /etc/yum.repos.d/docker-ce.repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum clean all && yum makecache

3、卸载旧版docker

[root@localhost ~]# yum list installed |grep docker
containerd.io.x86_64            1.6.33-3.1.el7                 @docker-c
docker-buildx-plugin.x86_64     0.14.1-1.el7                   @docker-c
docker-ce.x86_64                3:19.03.6-3.el7                @docker-c
docker-ce-cli.x86_64            1:26.1.4-1.el7                 @docker-c
docker-compose-plugin.x86_64    2.27.1-1.el7                   @docker-c


[root@localhost ~]# yum remove docker
[root@localhost ~]# yum remove containerd.io.x86_64

删除：

  rm -rf /etc/docker
  rm -rf /run/docker
  rm -rf /var/lib/dockershim
  rm -rf /var/lib/docker

4、docker安装

## yum安装

yum update
yum install -y yum-utils device-mapper-persistent-data lvm2
yum install docker-ce -y

# 查看源中可用版本
yum list docker-ce --showduplicates | sort -r

如果需要安装旧版本
yum install y docker-ce-18.09.9

5、镜像加速器

vim /etc/docker/daemon.json

添加一下内容：