1.run pod的时候提示"Back-off pulling image "registry.access.redhat.com/rhel7/pod-infrastructure:latest"
处理步骤：
yum install *rhsm*
docker pull registry.access.redhat.com/rhel7/pod-infrastructure:latest
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