# rpm2cpio python-rhsm-certificates-1.19.10-1.el7_4.x86_64.rpm | cpio -iv --to-stdout ./etc/rhsm/ca/redhat-uep.pem | tee /etc/rhsm/ca/redhat-uep.pem
# docker pull registry.access.redhat.com/rhel7/pod-infrastructure:latest
dial tcp: lookup access.redhat.com on 192.168.84.2:53: read udp 192.168.84.131:55994->192.168.84.2:53: i/o timeout
因为该镜像在墙外。解决办法：
# docker pull registry.cn-shenzhen.aliyuncs.com/yuxing/pod-infrastructure // 阿里云镜像仓库中镜像
# kubectl get pods // pod已启动