(3)安装chrony服务,并设置开机自启动 yuminstallchrony systemctlenablechronyd.service systemctlstartchronyd.service (4)更新系统,安装centos7下的mitaka依赖文件(使用“OpenStack模板1”不需要此步骤,在模 板中已经提前更新过了) yuminstallcentos-release-openstack-mitaka yuminstallhttps://rdoproject.org/repos/rdo-release.rpm yum