config YUM proxy
RUN sudo yum install -y yum-utils device-mapper-persistent-data lvm2
RUN yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
RUN sudo yum-config-manager --enable docker-ce-edge
RUN yum install -y --setopt=obsoletes=0 docker-ce-17.03.1.ce-1.el7.centos docker-ce-selinux-17.03.1.ce-1.el7.centos
check
check system version
