按照官方指导 Install Docker on CentOS 时遇到的问题
https://docs.docker.com/engine/reference/
https://docs.docker.com/engine/installation/linux/centos/
问题一:
GPG key retrieval failed: [Errno 14] curl#6 - "Could not resolve host: yum.dockerproject.org; Name or service not known"
解答:
配置的 /etc/yum.repos.d/docker.repo 里面的baseurl 有问题。
https 修改成 http 即可。