pause k8s镜像下载失败遇到的坑？

pod启动失败，查看pod详情(kubectl describe pods podname)

    Events:
      FirstSeen LastSeen    Count   From            SubobjectPath   Type        Reason      Message
      --------- --------    -----   ----            -------------   --------    ------      -------
      56s       56s     1   {default-scheduler }            Normal      Scheduled   Successfully assigned nfs-rc-fc2w8 to duni-node1
      11s       11s     1   {kubelet duni-node1}            Warning     FailedSync  Error syncing pod, skipping: failed to "StartContainer" for "POD" with ErrImagePull: "image pull failed for gcr.io/google_containers/pause-amd64:3.0, this may be because there are no credentials on this request.  details: (Get https://gcr.io/v1/_ping: dial tcp 74.125.203.82:443: i/o timeout)"