update prev succeeded indexes for indexed jobs unconditionally

pkg/controller/job/indexed_job_utils.go

@@ -52,7 +52,7 @@ type orderedIntervals []interval
 // empty list if this Job is not tracked with finalizers. The new list includes
 // the indexes that succeeded since the last sync.
 func calculateSucceededIndexes(job *batch.Job, pods []*v1.Pod) (orderedIntervals, orderedIntervals) {
-	prevIntervals := succeededIndexesFromJob(job)
+	prevIntervals := succeededIndexesFromString(job.Status.CompletedIndexes, int(*job.Spec.Completions))
 	newSucceeded := sets.NewInt()
 	for _, p := range pods {
 		ix := getCompletionIndex(p.Annotations)
@@ -148,20 +148,19 @@ func (oi orderedIntervals) has(ix int) bool {
 	return oi[hi].First <= ix
 }
 
-func succeededIndexesFromJob(job *batch.Job) orderedIntervals {
-	if job.Status.CompletedIndexes == "" {
+func succeededIndexesFromString(completedIndexes string, completions int) orderedIntervals {
+	if completedIndexes == "" {
 		return nil
 	}
 	var result orderedIntervals
 	var lastInterval *interval
-	completions := int(*job.Spec.Completions)
-	for _, intervalStr := range strings.Split(job.Status.CompletedIndexes, ",") {
+	for _, intervalStr := range strings.Split(completedIndexes, ",") {
 		limitsStr := strings.Split(intervalStr, "-")
 		var inter interval
 		var err error
 		inter.First, err = strconv.Atoi(limitsStr[0])
 		if err != nil {
-			klog.InfoS("Corrupted completed indexes interval, ignoring", "job", klog.KObj(job), "interval", intervalStr, "err", err)
+			klog.InfoS("Corrupted completed indexes interval, ignoring", "interval", intervalStr, "err", err)
 			continue
 		}
 		if inter.First >= completions {
@@ -170,7 +169,7 @@ func succeededIndexesFromJob(job *batch.Job) orderedIntervals {
 		if len(limitsStr) > 1 {
 			inter.Last, err = strconv.Atoi(limitsStr[1])
 			if err != nil {
-				klog.InfoS("Corrupted completed indexes interval, ignoring", "job", klog.KObj(job), "interval", intervalStr, "err", err)
+				klog.InfoS("Corrupted completed indexes interval, ignoring", "interval", intervalStr, "err", err)
 				continue
 			}
 			if inter.Last >= completions {

pkg/controller/job/job_controller.go

@@ -968,6 +968,7 @@ func (jm *Controller) trackJobStatusAndRemoveFinalizers(ctx context.Context, job
 			uidsWithFinalizer.Insert(uid)
 		}
 	}
+
 	// Shallow copy, as it will only be used to detect changes in the counters.
 	oldCounters := job.Status
 	if cleanUncountedPodsWithoutFinalizers(&job.Status, uidsWithFinalizer) {
@@ -1041,10 +1042,14 @@ func (jm *Controller) trackJobStatusAndRemoveFinalizers(ctx context.Context, job
 			break
 		}
 	}
-	if len(newSucceededIndexes) > 0 {
+	if isIndexed {
 		succeededIndexes = succeededIndexes.withOrderedIndexes(newSucceededIndexes)
+		succeededIndexesStr := succeededIndexes.String()
+		if succeededIndexesStr != job.Status.CompletedIndexes {
+			needsFlush = true
+		}
 		job.Status.Succeeded = int32(succeededIndexes.total())
-		job.Status.CompletedIndexes = succeededIndexes.String()
+		job.Status.CompletedIndexes = succeededIndexesStr
 	}
 	if feature.DefaultFeatureGate.Enabled(features.JobPodFailurePolicy) {
 		if finishedCond != nil && finishedCond.Type == batch.JobFailureTarget {
@@ -1695,9 +1700,24 @@ func findConditionByType(list []batch.JobCondition, cType batch.JobConditionType
 
 func recordJobPodFinished(job *batch.Job, oldCounters batch.JobStatus) {
 	completionMode := completionModeStr(job)
-	diff := job.Status.Succeeded - oldCounters.Succeeded
+	var diff int
+
+	// Updating succeeded metric must be handled differently
+	// for Indexed Jobs to handle the case where the job has
+	// been scaled down by reducing completions & parallelism
+	// in tandem, and now a previously completed index is
+	// now out of range (i.e. index >= spec.Completions).
+	if isIndexedJob(job) {
+		if job.Status.CompletedIndexes != oldCounters.CompletedIndexes {
+			diff = succeededIndexesFromString(job.Status.CompletedIndexes, int(*job.Spec.Completions)).total() - succeededIndexesFromString(oldCounters.CompletedIndexes, int(*job.Spec.Completions)).total()
+		}
+	} else {
+		diff = int(job.Status.Succeeded) - int(oldCounters.Succeeded)
+	}
 	metrics.JobPodsFinished.WithLabelValues(completionMode, metrics.Succeeded).Add(float64(diff))
-	diff = job.Status.Failed - oldCounters.Failed
+
+	// Update failed metric.
+	diff = int(job.Status.Failed - oldCounters.Failed)
 	metrics.JobPodsFinished.WithLabelValues(completionMode, metrics.Failed).Add(float64(diff))
 }
 

pkg/controller/job/job_controller_test.go

@@ -1053,6 +1053,8 @@ func TestTrackJobStatusAndRemoveFinalizers(t *testing.T) {
 		wantErr                 error
 		wantRmFinalizers        int
 		wantStatusUpdates       []batch.JobStatus
+		wantSucceededPodsMetric int
+		wantFailedPodsMetric    int
 	}{
 		"no updates": {},
 		"new active": {
@@ -1093,6 +1095,8 @@ func TestTrackJobStatusAndRemoveFinalizers(t *testing.T) {
 					Failed:                  3,
 				},
 			},
+			wantSucceededPodsMetric: 2,
+			wantFailedPodsMetric:    3,
 		},
 		"past and new finished pods": {
 			job: batch.Job{
@@ -1133,6 +1137,8 @@ func TestTrackJobStatusAndRemoveFinalizers(t *testing.T) {
 					Failed:                  6,
 				},
 			},
+			wantSucceededPodsMetric: 3,
+			wantFailedPodsMetric:    3,
 		},
 		"expecting removed finalizers": {
 			job: batch.Job{
@@ -1172,6 +1178,8 @@ func TestTrackJobStatusAndRemoveFinalizers(t *testing.T) {
 					Failed:                  6,
 				},
 			},
+			wantSucceededPodsMetric: 3,
+			wantFailedPodsMetric:    3,
 		},
 		"succeeding job": {
 			pods: []*v1.Pod{
@@ -1195,6 +1203,8 @@ func TestTrackJobStatusAndRemoveFinalizers(t *testing.T) {
 					CompletionTime:          &succeededCond.LastTransitionTime,
 				},
 			},
+			wantSucceededPodsMetric: 1,
+			wantFailedPodsMetric:    1,
 		},
 		"failing job": {
 			pods: []*v1.Pod{
@@ -1219,6 +1229,8 @@ func TestTrackJobStatusAndRemoveFinalizers(t *testing.T) {
 					Conditions:              []batch.JobCondition{*failedCond},
 				},
 			},
+			wantSucceededPodsMetric: 1,
+			wantFailedPodsMetric:    2,
 		},
 		"deleted job": {
 			job: batch.Job{
@@ -1251,6 +1263,8 @@ func TestTrackJobStatusAndRemoveFinalizers(t *testing.T) {
 					Failed:                  1,
 				},
 			},
+			wantSucceededPodsMetric: 1,
+			wantFailedPodsMetric:    1,
 		},
 		"status update error": {
 			pods: []*v1.Pod{
@@ -1339,6 +1353,62 @@ func TestTrackJobStatusAndRemoveFinalizers(t *testing.T) {
 					UncountedTerminatedPods: &batch.UncountedTerminatedPods{},
 				},
 			},
+			wantSucceededPodsMetric: 2,
+		},
+		"indexed job prev successful pods outside current completions index range with no new succeeded pods": {
+			job: batch.Job{
+				Spec: batch.JobSpec{
+					CompletionMode: &indexedCompletion,
+					Completions:    pointer.Int32(2),
+					Parallelism:    pointer.Int32(2),
+				},
+				Status: batch.JobStatus{
+					Active:           2,
+					Succeeded:        1,
+					CompletedIndexes: "3",
+				},
+			},
+			pods: []*v1.Pod{
+				buildPod().phase(v1.PodRunning).trackingFinalizer().index("0").Pod,
+				buildPod().phase(v1.PodRunning).trackingFinalizer().index("1").Pod,
+			},
+			wantRmFinalizers: 0,
+			wantStatusUpdates: []batch.JobStatus{
+				{
+					Active:                  2,
+					Succeeded:               0,
+					CompletedIndexes:        "",
+					UncountedTerminatedPods: &batch.UncountedTerminatedPods{},
+				},
+			},
+		},
+		"indexed job prev successful pods outside current completions index range with new succeeded pods in range": {
+			job: batch.Job{
+				Spec: batch.JobSpec{
+					CompletionMode: &indexedCompletion,
+					Completions:    pointer.Int32(2),
+					Parallelism:    pointer.Int32(2),
+				},
+				Status: batch.JobStatus{
+					Active:           2,
+					Succeeded:        1,
+					CompletedIndexes: "3",
+				},
+			},
+			pods: []*v1.Pod{
+				buildPod().phase(v1.PodRunning).trackingFinalizer().index("0").Pod,
+				buildPod().phase(v1.PodSucceeded).trackingFinalizer().index("1").Pod,
+			},
+			wantRmFinalizers: 1,
+			wantStatusUpdates: []batch.JobStatus{
+				{
+					Active:                  2,
+					Succeeded:               1,
+					CompletedIndexes:        "1",
+					UncountedTerminatedPods: &batch.UncountedTerminatedPods{},
+				},
+			},
+			wantSucceededPodsMetric: 1,
 		},
 		"indexed job new failed pods": {
 			job: batch.Job{
@@ -1371,6 +1441,7 @@ func TestTrackJobStatusAndRemoveFinalizers(t *testing.T) {
 					UncountedTerminatedPods: &batch.UncountedTerminatedPods{},
 				},
 			},
+			wantFailedPodsMetric: 3,
 		},
 		"indexed job past and new pods": {
 			job: batch.Job{
@@ -1409,6 +1480,8 @@ func TestTrackJobStatusAndRemoveFinalizers(t *testing.T) {
 					UncountedTerminatedPods: &batch.UncountedTerminatedPods{},
 				},
 			},
+			wantSucceededPodsMetric: 1,
+			wantFailedPodsMetric:    2,
 		},
 		"too many finished": {
 			job: batch.Job{
@@ -1449,6 +1522,8 @@ func TestTrackJobStatusAndRemoveFinalizers(t *testing.T) {
 					Failed:    1,
 				},
 			},
+			wantSucceededPodsMetric: 499,
+			wantFailedPodsMetric:    1,
 		},
 		"too many indexed finished": {
 			job: batch.Job{
@@ -1472,6 +1547,7 @@ func TestTrackJobStatusAndRemoveFinalizers(t *testing.T) {
 					Succeeded:               500,
 				},
 			},
+			wantSucceededPodsMetric: 500,
 		},
 		"pod flips from failed to succeeded": {
 			job: batch.Job{
@@ -1498,6 +1574,7 @@ func TestTrackJobStatusAndRemoveFinalizers(t *testing.T) {
 					Conditions:              []batch.JobCondition{*failedCond},
 				},
 			},
+			wantFailedPodsMetric: 2,
 		},
 	}
 	for name, tc := range cases {
@@ -1517,7 +1594,10 @@ func TestTrackJobStatusAndRemoveFinalizers(t *testing.T) {
 				job.Status.UncountedTerminatedPods = &batch.UncountedTerminatedPods{}
 			}
 			uncounted := newUncountedTerminatedPods(*job.Status.UncountedTerminatedPods)
-			succeededIndexes := succeededIndexesFromJob(job)
+			var succeededIndexes orderedIntervals
+			if isIndexedJob(job) {
+				succeededIndexes = succeededIndexesFromString(job.Status.CompletedIndexes, int(*job.Spec.Completions))
+			}
 			err := manager.trackJobStatusAndRemoveFinalizers(context.TODO(), job, tc.pods, succeededIndexes, *uncounted, tc.expectedRmFinalizers, tc.finishedCond, tc.needsFlush)
 			if !errors.Is(err, tc.wantErr) {
 				t.Errorf("Got error %v, want %v", err, tc.wantErr)
@@ -1535,17 +1615,15 @@ func TestTrackJobStatusAndRemoveFinalizers(t *testing.T) {
 				if err != nil {
 					t.Fatalf("Obtaining succeeded job_pods_finished_total: %v", err)
 				}
-				newSucceeded := job.Status.Succeeded - tc.job.Status.Succeeded
-				if float64(newSucceeded) != v {
-					t.Errorf("Metric reports %.0f succeeded pods, want %d", v, newSucceeded)
+				if float64(tc.wantSucceededPodsMetric) != v {
+					t.Errorf("Metric reports %.0f succeeded pods, want %d", v, tc.wantSucceededPodsMetric)
 				}
 				v, err = metricstestutil.GetCounterMetricValue(metrics.JobPodsFinished.WithLabelValues(completionMode, metrics.Failed))
 				if err != nil {
 					t.Fatalf("Obtaining failed job_pods_finished_total: %v", err)
 				}
-				newFailed := job.Status.Failed - tc.job.Status.Failed
-				if float64(newFailed) != v {
-					t.Errorf("Metric reports %.0f failed pods, want %d", v, newFailed)
+				if float64(tc.wantFailedPodsMetric) != v {
+					t.Errorf("Metric reports %.0f failed pods, want %d", v, tc.wantFailedPodsMetric)
 				}
 			}
 		})