错误：软件包：3:docker-ce-19.03.12-3.el7.x86_64 (docker-ce-stable) 需要：container-selinux >= 2:2.74 错误：软件包：containerd.io-1.2.13-3.2.el7.x86_64 (docker-ce-stable) 需要：container-selinux >= 2:2.74
解决方法：
yum install --setopt=obsoletes=0 \ docker-ce-17.03.2.ce-1.el7.centos.x86_64 \ docker-ce-selinux-17.03.2.ce-1.el7.centos.noarch # on a new system with yum repo defined, forcing older version and ignoring obsoletes introduced by 17.06.0