Implemented cloud-provider integration for OpenStack.

Currently kubespray does not install kubernetes in a way that allows cinder volumes to be used. This commit provides the necessary cloud configuration file and configures kubelet and kube-apiserver to use it.

roles/kubernetes/node/templates/kubelet.j2

@@ -32,7 +32,14 @@ DOCKER_SOCKET="--docker-endpoint=unix:/var/run/weave/weave.sock"
 {% endif %}
 # Should this cluster be allowed to run privileged docker containers
 KUBE_ALLOW_PRIV="--allow_privileged=true"
+{% if cloud_provider is defined and cloud_provider == "openstack" %}
+KUBELET_CLOUDPROVIDER="--cloud-provider={{ cloud_provider }} --cloud-config={{ kube_config_dir }}/cloud_config"
+{% else %}
+{# TODO: gce and aws don't need the cloud provider to be set? #}
+KUBELET_CLOUDPROVIDER=""
+{% endif %}
 {% if ansible_service_mgr in ["sysvinit","upstart"] %}
 DAEMON_ARGS="$KUBE_LOGGING $KUBE_LOG_LEVEL $KUBE_ALLOW_PRIV $KUBELET_API_SERVER $KUBELET_ADDRESS \
-$KUBELET_HOSTNAME $KUBELET_REGISTER_NODE $KUBELET_ARGS $DOCKER_SOCKET $KUBELET_ARGS $KUBELET_NETWORK_PLUGIN"
+$KUBELET_HOSTNAME $KUBELET_REGISTER_NODE $KUBELET_ARGS $DOCKER_SOCKET $KUBELET_ARGS $KUBELET_NETWORK_PLUGIN \
+$KUBELET_CLOUDPROVIDER"
 {% endif %}

roles/kubernetes/node/templates/kubelet.service.j2

@@ -20,7 +20,8 @@ ExecStart={{ bin_dir }}/kubelet \
 		$KUBELET_ARGS \
 		$DOCKER_SOCKET \
 		$KUBELET_REGISTER_NODE \
-		$KUBELET_NETWORK_PLUGIN
+		$KUBELET_NETWORK_PLUGIN \
+		$KUBELET_CLOUDPROVIDER
 Restart=on-failure
 
 [Install]