解决方法：试试通过手动下载
docker pull registry.access.redhat.com/rhel7/pod-infrastructure:latest
docker pull 是还是报错
open /etc/docker/certs.d/registry.access.redhat.com/redhat-ca.crt: no such file or directory
查看下redhat-ca.crt确实不存在，registry.access.redhat.com/rhel7/pod-infrastructure:latest默认是https下载。
最终解决方案：
1.docker search pod-infrastructure
INDEX NAME DESCRIPTION STARS OFFICIAL AUTOMATED
docker.io docker.io/openshift/origin-pod The pod infrastructure image for OpenShift 3 8
docker.io docker.io/davinkevin/podcast-server Container around the Podcast-Server Applic... 5
docker.io docker.io/infrastructureascode/aws-cli Containerized AWS CLI on alpine to avoid r... 4 [OK]
docker.io docker.io/newrelic/infrastructure Public image for New Relic Infrastructure. 3
docker.io docker.io/infrastructureascode/uwsgi uWSGI application server 2 [OK]
docker.io docker.io/infrastructureascode/serf A tiny Docker image with HashiCorp Serf us... 1 [OK]
docker.io docker.io/mosquitood/k8s-rhel7-pod-infrastructure 1
docker.io docker.io/podigg/podigg-lc-hobbit A HOBBIT dataset generator wrapper for PoDiGG 1 [OK]
docker.io docker.io/tianyebj/pod-infrastructure registry.access.redhat.com/rhel7/pod-infra... 1
docker.io docker.io/w564791/pod-infrastructure latest 1
docker.io docker.io/infrastructureascode/hello-world A tiny "Hello World" web server with a hea... 0 [OK]
找到可用的进行pull到本地。
2.docker pull docker.io/tianyebj/pod-infrastructure
3.docker tag pod-infrastructure 10.0.2.11:5000/pod-infrastructure
其中10.0.2.11是本机的IP，pull下来之后push到本机的私有仓库。
4.docker push 10.0.2.11:5000/pod-infrastructure
5. /etc/kubernetes/kubelet
pod-infrastructure是在node的kubelet配置文件中定义的， 要更改每个node中/etc/kubernetes/kubelet中对应的
“KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest"
修改为：
"KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image= 10.0.2.11:5000/pod-infrastructure:latest "
更改之后需要重启kubelet服务。
7.重启
systemctl restart kube-apiserver
systemctl restart kube-controller-manager
systemctl restart kube-scheduler
systemctl restart kubelet
systemctl restart kube-proxy
8. kubectl get pods 查看之前的pods已经正常状态Running