docker离线安装

yum install wget

wget http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

cp docker-ce.repo /etc/yum.repos.d/

yum list docker-ce --showduplicates

yum install --setopt=obsoletes=0 --downloadonly --downloaddir=/home/pkgs  docker-ce-17.03.2.ce-1.el7.centos.x86_64

yum localinstall *.rpm