Make vrs controller filter out terminating pods (#495)

Signed-off-by: Xudong Sun <[email protected]>

src/controller_examples/v_replica_set_controller/exec/reconciler.rs

@@ -267,9 +267,13 @@ fn filter_pods(pods: Vec<Pod>, v_replica_set: &VReplicaSet) -> (filtered_pods: V
     let mut idx = 0;
     while idx < pods.len() {
         let pod = &pods[idx];
-        // TODO: check other conditions such as pod status and deletion timestamp
+        // TODO: check other conditions such as pod status
+        // Check the following conditions:
+        // (1) the pod's label should match the replica set's selector
         if pod.metadata().owner_references_contains(v_replica_set.controller_owner_ref())
-        && v_replica_set.spec().selector().matches(pod.metadata().labels().unwrap_or(StringMap::new())) {
+        && v_replica_set.spec().selector().matches(pod.metadata().labels().unwrap_or(StringMap::new()))
+        // (2) the pod should not be terminating (its deletion timestamp is nil)
+        && !pod.metadata().has_deletion_timestamp() {
             filtered_pods.push(pod.clone());
         }
         idx = idx + 1;