centos8安装docker和docker-compose

1.安装containerd.io

centos8默认使用podman代替docker，所以需要containerd.io，

yum install https://download.docker.com/linux/fedora/30/x86_64/stable/Packages/containerd.io-1.2.6-3.3.fc30.x86_64.rpm

2.依赖安装和添加仓库

yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum makecache

3.安装docker-ce

dnf -y remove podman #放置podman和docker冲突，需先删除系统默认的podman
dnf -y install docker-ce

4.开启Docker服务并设置开机自启

systemctl start docker && sudo systemctl enable docker

5.测试安装结果

docker version