WIP Skip pods marked for deletion

In cases where the amount of ips is limited, pods affected by
a node shutdown remain in Terminating state and do not release
their allocations. Deployments are not able to create pods in
healthy nodes due to the lack of ips. These changes force the
ip reconciler to skip pods marked as deletion by a Taint Manager.
The toleration node.kubernetes.io/unreachable is expected to trigger
this. However, it is safe if other tolerations with NoExecute also
trigger the cleaning up.

Signed-off-by: Marcelo Guerrero <marguerr@redhat.com>

Author: Marcelo Guerrero

pkg/reconciler/wrappedPod.go

@@ -46,6 +46,12 @@ func indexPods(livePodList []v1.Pod, whereaboutsPodNames map[string]void) map[st
 		if _, isWhereaboutsPod := whereaboutsPodNames[podRef]; !isWhereaboutsPod {
 			continue
 		}
+
+		if isPodMarkedForDeletion(pod.Status.Conditions) {
+			logging.Debugf("Pod %s is marked for deletion; skipping", podRef)
+			continue
+		}
+
 		wrappedPod := wrapPod(pod)
 		if wrappedPod != nil {
 			podMap[podRef] = *wrappedPod
@@ -54,6 +60,15 @@ func indexPods(livePodList []v1.Pod, whereaboutsPodNames map[string]void) map[st
 	return podMap
 }
 
+func isPodMarkedForDeletion(conditions []v1.PodCondition) bool {
+	for _, c := range conditions {
+		if c.Type == v1.DisruptionTarget && c.Status == v1.ConditionTrue && c.Reason == "DeletionByTaintManager" {
+			return true
+		}
+	}
+	return false
+}
+
 func getFlatIPSet(pod v1.Pod) (map[string]void, error) {
 	var empty void
 	ipSet := map[string]void{}