yum-yinstalldocker-ce，安装高版本docke-ce，报错Problem:packagedocker-ce-3:19.03.8-3.el7.x86_64requirescontainerd.io>=1.2.2-3,butnoneoftheproviderscanbeinstalled，意思就是containerd.io的版本必须大于等于1.2.2-3，从https://download.docker.com下载很慢，这是相应的高版本containerd.io。或者直接安装低版本docker-ce,yum-yinstalldock