Following the directions here[1] - adding Docker CE to CentOS 7.3 is broken right now:

[root@sandbox ~]# yum-config-manager --add-repo https://download.docker.com/linux/centos/docker.repo Loaded plugins: fastestmirror adding repo from: https://download.docker.com/linux/centos/docker.repo grabbing file https://download.docker.com/linux/centos/docker.repo to /etc/yum.repos.d/docker.repo Could not fetch/save url https://download.docker.com/linux/centos/docker.repo to file /etc/yum.repos.d/docker.repo: [Errno 14] HTTPS Error 403 - Forbidden

[1] https://store.docker.com/editions/community/docker-ce-server...