Docker的安装教程

提供一个docker教程网站，https://www.runoob.com/docker/
还有一个Docker官网的教程，https://docs.docker.com/engine/install/centos/
系统环境centos8，内核要求相对新一些。
如何查看系统内核版本
uname -r
卸载旧版本
sudo yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-engine
安装所需的软件包
sudo yum install -y yum-utils \
  device-mapper-persistent-data \
  lvm2
安装某个组件升级
yum install https://download.docker.com/linux/fedora/30/x86_64/stable/Packages/containerd.io-1.2.6-3.3.fc30.x86_64.rpm
Install Docker Engine
设置稳定的仓库
sudo yum-config-manager \
–add-repo \
https://download.docker.com/linux/centos/docker-ce.repo
安装 Docker Engine-Community
sudo yum install docker-ce docker-ce-cli containerd.io

出现此类报错时候
file /usr/share/man/man1/docker-volume.1.gz from install of docker-ce-cli-1:19.03.8-3.el7.x86_64 conflicts with file from package podman-manpages-1.4.2-5.module_el8.1.0+237+63e26edc.noarch
解决方案
yum remove podman-manpages -y
开启docker
sudo systemctl start docker
测试运行
sudo docker run hello-world
开机自动启动Docker
systemctl enable docker