kubernetes 启动容器时，容器一直是 ContainerCreating 不能 running 的解决方案

  Kubernetes创建启动容器：
	  --------------------------------------------------------------------
	  [docker@localhost ~]$ kubectl create -f kubernetes_yaml/
	  replicationcontroller "mysql" created
	  service "mysql" created
	  replicationcontroller "myweb" created
	  service "myweb" created
	  --------------------------------------------------------------------
	  检查pod：
	  --------------------------------------------------------------------
	  [docker@localhost ~]$ kubectl get pods
	  NAME          READY     STATUS              RESTARTS   AGE
	  mysql-7shv6   0/1       ContainerCreating   0          6s
	  myweb-2vg5v   0/1       ContainerCreating   0          6s
	  myweb-hz3zd   0/1       ContainerCreating   0          6s
	  --------------------------------------------------------------------
	  这是容器状态都属于ContainerCreating，而不是Running
	  
	  解决方案：
	  方案一：
	  --------------------------------------------------------------------
	  [root@localhost ~]# yum install *rhsm* -y
	  [root@localhost ~]# docker pull registry.access.redhat.com/rhel7/pod-infrastructure:latest
	  --------------------------------------------------------------------
	  到这里如果检查pod状态还是ContainerCreating，尝试方案二
	  
	  方案二：
	  --------------------------------------------------------------------
	  [root@localhost ~]# docker pull docker.io/kubernetes/pause
	  [root@localhost ~]# docker tag docker.io/kubernetes/pause gcr.io/google_containers/pause-amd64:3.0
	  [root@k8s ~]# docker rmi -f docker.io/kubernetes/pause
	  --------------------------------------------------------------------
	  到这里先进行delete，在重新创建容器
	  --------------------------------------------------------------------
	  [docker@localhost ~]$ kubectl delete -f kubernetes_yaml/
	  replicationcontroller "mysql" deleted
	  service "mysql" deleted
	  replicationcontroller "myweb" deleted
	  service "myweb" deleted
	  --------------------------------------------------------------------
	  新建完成后，进行检查pod状态，如果还是ContainerCreating状态，方案三一定可以解决
	  
	  方案三：
	  --------------------------------------------------------------------
	  [root@localhost ~]# wget http://mirror.centos.org/centos/7/os/x86_64/Packages/python-rhsm-certificates-1.19.10-1.el7_4.x86_64.rpm
	  [root@localhost ~]# 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
	  [root@localhost ~]# docker pull registry.access.redhat.com/rhel7/pod-infrastructure:latest
	  --------------------------------------------------------------------
	  到这里就算结束了，这三种方案一定会解决【open /etc/docker/certs.d/registry.access.redhat.com/redhat-ca.crt: no such file or directory】证书的问题。