Optimize a request to find device plugin pods.

Add a resourceVersion=0 to the reuqest to find device plugin pods
on a given node from the latest cache from the kube-apiserver.
Without a resourceVersion the request needs to reach etcd first and
then kube-apiserver will filter out the pods.

Due to this etcd can get overloaded. Since it runs in daemonset,
they get created on every node. If a cluster has a lot of nodes
the list requests will put a cluster down.

pkg/daemon/daemon.go

@@ -732,8 +732,9 @@ func (dn *Daemon) restartDevicePluginPod() error {
 
 	var podToDelete string
 	pods, err := dn.kubeClient.CoreV1().Pods(vars.Namespace).List(context.Background(), metav1.ListOptions{
-		LabelSelector: "app=sriov-device-plugin",
-		FieldSelector: "spec.nodeName=" + vars.NodeName,
+		LabelSelector:   "app=sriov-device-plugin",
+		FieldSelector:   "spec.nodeName=" + vars.NodeName,
+		ResourceVersion: "0",
 	})
 	if err != nil {
 		if errors.IsNotFound(err) {