==> k8smaster: [2016-05-04 12:06:09]: Waiting for docker to start. This may take a couple minutes.
==> k8smaster: [2016-05-04 12:06:09]: Fetching Kubernetes master containers
==> k8smaster: [2016-05-04 12:06:09]: Using default tag: latest
==> k8smaster: [2016-05-04 12:06:09]: Trying to pull repository docker.io/rhel7/kubernetes-controller-mgr ... 551bcef2b336: Pulling image (latest) from docker.io/rhel7/kubernetes-controller-mgr
==> k8smaster: [2016-05-04 12:06:09]: 551bcef2b336: Pulling image (latest) from docker.io/rhel7/kubernetes-controller-mgr, endpoint: https://registry.access.redhat.com/v1/
==> k8smaster: [2016-05-04 12:06:09]: 551bcef2b336: Pulling dependent layers
==> k8smaster: [2016-05-04 12:06:09]: 95612a3264fc: Pulling metadata
==> k8smaster: [2016-05-04 12:06:09]: 95612a3264fc: Error pulling dependent layers
==> k8smaster: [2016-05-04 12:06:09]: 551bcef2b336: Error pulling image (latest) from docker.io/rhel7/kubernetes-controller-mgr, endpoint: https://registry.access.redhat.com/v1/, HTTP code 404
==> k8smaster: [2016-05-04 12:06:09]: 551bcef2b336: Error pulling image (latest) from docker.io/rhel7/kubernetes-controller-mgr, HTTP code 404
==> k8smaster: [2016-05-04 12:06:09]: failed
==> k8smaster: [2016-05-04 12:06:09]: Error pulling image (latest) from docker.io/rhel7/kubernetes-controller-mgr, HTTP code 404