Dcoker學習——基於centos安裝docker

1.首先要檢查centos版本

Docker 要求 CentOS 系統的內核版本高於 3.10 ，查看本頁面的前提條件來驗證你的CentOS 版本是否支持 Docke

[root@host-192-168-48-4 ~]# uname -r
4.18.0-147.8.1.el8_1.x86_64

2.移除舊版本的docker

yum remove docker  docker-common docker-selinux docker-engine

3.安裝需要的軟件包， yum-util 提供yum-config-manager功能，另外兩個是devicemapper驅動依賴的

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

Last metadata expiration check: 0:09:35 ago on Sun 21 Jun 2020 10:09:03 PM CST.
Package yum-utils-4.0.12-3.el8.noarch is already installed.
Package device-mapper-persistent-data-0.8.5-3.el8.x86_64 is already installed.
Package lvm2-8:2.03.08-3.el8.x86_64 is already installed.
Dependencies resolved.
Nothing to do.
Complete!

4.添加yum源信息，更新yum源緩存

sudo yum-config-manager --add-repo http://mirrors.a