feat: add stopping stage update run implementation

apis/placement/v1beta1/stageupdate_types.go

@@ -427,7 +427,7 @@ const (
 	// Its condition status can be one of the following:
 	// - "True": The staged update run is making progress.
 	// - "False": The staged update run is waiting/paused/abandoned.
-	// - "Unknown" means it is unknown.
+	// - "Unknown": The staged update run is in the process of stopping.
 	StagedUpdateRunConditionProgressing StagedUpdateRunConditionType = "Progressing"
 
 	// StagedUpdateRunConditionSucceeded indicates whether the staged update run is completed successfully.
@@ -489,7 +489,8 @@ const (
 	// StageUpdatingConditionProgressing indicates whether the stage updating is making progress.
 	// Its condition status can be one of the following:
 	// - "True": The stage updating is making progress.
-	// - "False": The stage updating is waiting/pausing.
+	// - "False": The stage updating is waiting.
+	// - "Unknown": The staged update run is in the process of stopping.
 	StageUpdatingConditionProgressing StageUpdatingConditionType = "Progressing"
 
 	// StageUpdatingConditionSucceeded indicates whether the stage updating is completed successfully.

pkg/controllers/updaterun/controller.go

@@ -164,7 +164,7 @@ func (r *Reconciler) Reconcile(ctx context.Context, req runtime.Request) (runtim
 		klog.V(2).InfoS("The updateRun is initialized but not executed, waiting to execute", "state", state, "updateRun", runObjRef)
 	case placementv1beta1.StateRun:
 		// Execute the updateRun.
-		klog.InfoS("Continue to execute the updateRun", "updatingStageIndex", updatingStageIndex, "updateRun", runObjRef)
+		klog.V(2).InfoS("Continue to execute the updateRun", "updatingStageIndex", updatingStageIndex, "updateRun", runObjRef)
 		finished, waitTime, execErr := r.execute(ctx, updateRun, updatingStageIndex, toBeUpdatedBindings, toBeDeletedBindings)
 		if errors.Is(execErr, errStagedUpdatedAborted) {
 			// errStagedUpdatedAborted cannot be retried.
@@ -176,23 +176,23 @@ func (r *Reconciler) Reconcile(ctx context.Context, req runtime.Request) (runtim
 			return runtime.Result{}, r.recordUpdateRunSucceeded(ctx, updateRun)
 		}
 
-		// The execution is not finished yet or it encounters a retriable error.
-		// We need to record the status and requeue.
-		if updateErr := r.recordUpdateRunStatus(ctx, updateRun); updateErr != nil {
-			return runtime.Result{}, updateErr
-		}
-		klog.V(2).InfoS("The updateRun is not finished yet", "requeueWaitTime", waitTime, "execErr", execErr, "updateRun", runObjRef)
-		if execErr != nil {
-			return runtime.Result{}, execErr
-		}
-		return runtime.Result{Requeue: true, RequeueAfter: waitTime}, nil
+		return r.handleIncompleteUpdateRun(ctx, updateRun, waitTime, execErr, state, runObjRef)
 	case placementv1beta1.StateStop:
 		// Stop the updateRun.
-		klog.InfoS("Stopping the updateRun", "state", state, "updatingStageIndex", updatingStageIndex, "updateRun", runObjRef)
-		// TODO(britaniar): Implement the stopping logic for in-progress stages.
+		klog.V(2).InfoS("Stopping the updateRun", "state", state, "updatingStageIndex", updatingStageIndex, "updateRun", runObjRef)
+		finished, waitTime, stopErr := r.stop(updateRun, updatingStageIndex, toBeUpdatedBindings, toBeDeletedBindings)
+		if errors.Is(stopErr, errStagedUpdatedAborted) {
+			// errStagedUpdatedAborted cannot be retried.
+			return runtime.Result{}, r.recordUpdateRunFailed(ctx, updateRun, stopErr.Error())
+		}
+
+		if finished {
+			klog.V(2).InfoS("The updateRun is stopped", "updateRun", runObjRef)
+			return runtime.Result{}, r.recordUpdateRunStopped(ctx, updateRun)
+		}
+
+		return r.handleIncompleteUpdateRun(ctx, updateRun, waitTime, stopErr, state, runObjRef)
 
-		klog.V(2).InfoS("The updateRun is stopped", "updateRun", runObjRef)
-		return runtime.Result{}, r.recordUpdateRunStopped(ctx, updateRun)
 	default:
 		// Initialize, Run, or Stop are the only supported states.
 		unexpectedErr := controller.NewUnexpectedBehaviorError(fmt.Errorf("found unsupported updateRun state: %s", state))
@@ -202,6 +202,21 @@ func (r *Reconciler) Reconcile(ctx context.Context, req runtime.Request) (runtim
 	return runtime.Result{}, nil
 }
 
+func (r *Reconciler) handleIncompleteUpdateRun(ctx context.Context, updateRun placementv1beta1.UpdateRunObj, waitTime time.Duration, err error, state placementv1beta1.State, runObjRef klog.ObjectRef) (runtime.Result, error) {
+	// The execution or stopping is not finished yet or it encounters a retriable error.
+	// We need to record the status and requeue.
+	if updateErr := r.recordUpdateRunStatus(ctx, updateRun); updateErr != nil {
+		return runtime.Result{}, updateErr
+	}
+
+	klog.V(2).InfoS("The updateRun is not finished yet", "state", state, "requeueWaitTime", waitTime, "err", err, "updateRun", runObjRef)
+
+	if err != nil {
+		return runtime.Result{}, err
+	}
+	return runtime.Result{Requeue: true, RequeueAfter: waitTime}, nil
+}
+
 // handleDelete handles the deletion of the updateRun object.
 // We delete all the dependent resources, including approvalRequest objects, of the updateRun object.
 func (r *Reconciler) handleDelete(ctx context.Context, updateRun placementv1beta1.UpdateRunObj) (bool, time.Duration, error) {

pkg/controllers/updaterun/controller_integration_test.go

@@ -333,6 +333,16 @@ func generateFailedMetric(updateRun *placementv1beta1.ClusterStagedUpdateRun) *p
 	}
 }
 
+func generateStoppingMetric(updateRun *placementv1beta1.ClusterStagedUpdateRun) *prometheusclientmodel.Metric {
+	return &prometheusclientmodel.Metric{
+		Label: generateMetricsLabels(updateRun, string(placementv1beta1.StagedUpdateRunConditionProgressing),
+			string(metav1.ConditionUnknown), condition.UpdateRunStoppingReason),
+		Gauge: &prometheusclientmodel.Gauge{
+			Value: ptr.To(float64(time.Now().UnixNano()) / 1e9),
+		},
+	}
+}
+
 func generateStoppedMetric(updateRun *placementv1beta1.ClusterStagedUpdateRun) *prometheusclientmodel.Metric {
 	return &prometheusclientmodel.Metric{
 		Label: generateMetricsLabels(updateRun, string(placementv1beta1.StagedUpdateRunConditionProgressing),
@@ -858,3 +868,12 @@ func generateFalseConditionWithReason(obj client.Object, condType any, reason st
 	falseCond.Reason = reason
 	return falseCond
 }
+
+func generateProgressingUnknownConditionWithReason(obj client.Object, reason string) metav1.Condition {
+	return metav1.Condition{
+		Status:             metav1.ConditionUnknown,
+		Type:               string(placementv1beta1.StageUpdatingConditionProgressing),
+		ObservedGeneration: obj.GetGeneration(),
+		Reason:             reason,
+	}
+}

pkg/controllers/updaterun/execution.go

@@ -18,7 +18,6 @@ package updaterun
 
 import (
 	"context"
-	"errors"
 	"fmt"
 	"reflect"
 	"strconv"
@@ -68,14 +67,7 @@ func (r *Reconciler) execute(
 
 	// Set up defer function to handle errStagedUpdatedAborted.
 	defer func() {
-		if errors.Is(err, errStagedUpdatedAborted) {
-			if updatingStageStatus != nil {
-				markStageUpdatingFailed(updatingStageStatus, updateRun.GetGeneration(), err.Error())
-			} else {
-				// Handle deletion stage case.
-				markStageUpdatingFailed(updateRunStatus.DeletionStageStatus, updateRun.GetGeneration(), err.Error())
-			}
-		}
+		checkIfErrorStagedUpdateAborted(err, updateRun, updatingStageStatus)
 	}()
 
 	// Mark updateRun as progressing if it's not already marked as waiting or stuck.
@@ -232,9 +224,7 @@ func (r *Reconciler) executeUpdatingStage(
 				}
 			}
 			markClusterUpdatingStarted(clusterStatus, updateRun.GetGeneration())
-			if finishedClusterCount == 0 {
-				markStageUpdatingStarted(updatingStageStatus, updateRun.GetGeneration())
-			}
+			markStageUpdatingStarted(updatingStageStatus, updateRun.GetGeneration())
 			// Need to continue as we need to process at most maxConcurrency number of clusters in parallel.
 			continue
 		}
@@ -564,6 +554,9 @@ func calculateMaxConcurrencyValue(status *placementv1beta1.UpdateRunStatus, stag
 func aggregateUpdateRunStatus(updateRun placementv1beta1.UpdateRunObj, stageName string, stuckClusterNames []string) {
 	if len(stuckClusterNames) > 0 {
 		markUpdateRunStuck(updateRun, stageName, strings.Join(stuckClusterNames, ", "))
+	} else if updateRun.GetUpdateRunSpec().State == placementv1beta1.StateStop {
+		// If there is no stuck cluster and the update run state is stop, mark the update run as stopping.
+		markUpdateRunStopping(updateRun)
 	} else {
 		// If there is no stuck cluster but some progress has been made, mark the update run as progressing.
 		markUpdateRunProgressing(updateRun)