docker 安装 参考官方网站文档，阅读文档，官方提供安装脚本，通过执行脚本，可以一键安装 docker engine，很方便。
$curl -fsSL https://get.docker.com -o get-docker.sh $sudo sh get-docker.sh 我在 centos8 安装时遇到报错
Error: Problem: problem with installed package buildah-1.11.6-7.module_el8.2.0 305 5e198a41.x86_64 - package buildah-1.11.6-7.module_el8.2.0 305 5e198a41.x86_64 requires runc >= 1.0.0-26, but none of the providers can be installed 直接卸载 runc 重新执行脚本即可成功安装。
$sudo rpm -e runc --nodeps $sudo sh get-docker.sh ... ================================================================================ To run Docker as a non-privileged user, consider setting up the Docker daemon in rootless mode for your user: dockerd-rootless-setuptool.sh install Visit https://docs.docker.com/go/rootless/ to learn about rootless mode. To run the Docker daemon as a fully privileged service, but granting non-root users access, refer to https://docs.docker.com/go/daemon-access/ WARNING: Access to the remote API on a privileged Docker daemon is equivalent to root access on the host. Refer to the 'Docker daemon attack surface' documentation for details: https://docs.docker.com/go/attack-surface/ ================================================================================ 安装完成后，需要手动启动服务
$sudo systemctl start docker