[vagrant@localhost ~]$ sudo yum-config-manager     --add-repo     https://download.docker.com/linux/centos/docker-ce.repo

Failed to set locale, defaulting to C

Loaded plugins: fastestmirror

adding repo from: https://download.docker.com/linux/centos/docker-ce.repo

grabbing file https://download.docker.com/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo

Could not fetch/save url https://download.docker.com/linux/centos/docker-ce.repo to file /etc/yum.repos.d/docker-ce.repo: [Errno 12] Timeout on https://download.docker.com/linux/centos/docker-ce.repo: (28, 'Operation timed out after 30001 milliseconds with 0 out of 0 bytes received')

无限重复上述错误