Use atomic containers for kubelet & apiserver

Use system containers based on fedora rawhide from
projectatomic [1]. Until the fedoraproject updated
the tags properly we mirror our containers in [2].
System containers are meant to be drop in replacements
of the fedora kubernetes binaries.

Update k8s to 1.7.4 to match the version in the containers.

[1] https://github.com/projectatomic/atomic-system-containers
[2] https://hub.docker.com/r/openstackmagnum/

Implements: blueprint run-kube-as-container

Change-Id: I22918c0b06ca34d96ee68ac43fabcd5c0b281950

doc/source/user/index.rst

@@ -2494,7 +2494,7 @@ The image currently has the following OS/software:
 +-------------+-----------+
 | Docker      | 1.13.1    |
 +-------------+-----------+
-| Kubernetes  | 1.6.7     |
+| Kubernetes  | 1.7.4     |
 +-------------+-----------+
 | etcd        | 3.1.3     |
 +-------------+-----------+

magnum/drivers/common/templates/kubernetes/fragments/configure-kubernetes-master.sh

@@ -4,6 +4,9 @@
 
 echo "configuring kubernetes (master)"
 
+atomic install --storage ostree --system --system-package=no --name=kubelet docker.io/openstackmagnum/kubernetes-kubelet:${KUBE_VERSION}
+atomic install --storage ostree --system --system-package=no --name=kube-apiserver docker.io/openstackmagnum/kubernetes-apiserver:${KUBE_VERSION}
+
 sed -i '
     /^KUBE_ALLOW_PRIV=/ s/=.*/="--allow-privileged='"$KUBE_ALLOW_PRIV"'"/
 ' /etc/kubernetes/config

magnum/drivers/common/templates/kubernetes/fragments/configure-kubernetes-minion.sh

@@ -4,6 +4,8 @@
 
 echo "configuring kubernetes (minion)"
 
+atomic install --storage ostree --system --system-package=no --name=kubelet docker.io/openstackmagnum/kubernetes-kubelet:${KUBE_VERSION}
+
 CERT_DIR=/etc/kubernetes/certs
 PROTOCOL=https
 FLANNEL_OPTIONS="-etcd-cafile $CERT_DIR/ca.crt \

magnum/drivers/k8s_fedora_atomic_v1/templates/kubecluster.yaml

@@ -316,7 +316,7 @@ parameters:
   kube_version:
     type: string
     description: version of kubernetes used for kubernetes cluster
-    default: v1.6.7
+    default: v1.7.4
 
   kube_dashboard_version:
     type: string

magnum/drivers/k8s_fedora_ironic_v1/templates/kubecluster.yaml

@@ -319,7 +319,7 @@ parameters:
   kube_version:
     type: string
     description: version of kubernetes used for kubernetes cluster
-    default: v1.5.3
+    default: v1.7.4
 
   kube_dashboard_version:
     type: string