Allow stopping admission from a specific LocalQueue.

apis/kueue/v1beta1/clusterqueue_types.go

@@ -158,14 +158,6 @@ const (
 	BestEffortFIFO QueueingStrategy = "BestEffortFIFO"
 )
 
-type StopPolicy string
-
-const (
-	None         StopPolicy = "None"
-	HoldAndDrain StopPolicy = "HoldAndDrain"
-	Hold         StopPolicy = "Hold"
-)
-
 // +kubebuilder:validation:XValidation:rule="self.flavors.all(x, size(x.resources) == size(self.coveredResources))", message="flavors must have the same number of resources as the coveredResources"
 type ResourceGroup struct {
 	// coveredResources is the list of resources covered by the flavors in this

apis/kueue/v1beta1/localqueue_types.go

@@ -27,6 +27,20 @@ type LocalQueueSpec struct {
 	// clusterQueue is a reference to a clusterQueue that backs this localQueue.
 	// +kubebuilder:validation:XValidation:rule="self == oldSelf", message="field is immutable"
 	ClusterQueue ClusterQueueReference `json:"clusterQueue,omitempty"`
+
+	// stopPolicy - if set to a value different from None, the LocalQueue is considered Inactive,
+	// no new reservation being made.
+	//
+	// Depending on its value, its associated workloads will:
+	//
+	// - None - Workloads are admitted
+	// - HoldAndDrain - Admitted workloads are evicted and Reserving workloads will cancel the reservation.
+	// - Hold - Admitted workloads will run to completion and Reserving workloads will cancel the reservation.
+	//
+	// +optional
+	// +kubebuilder:validation:Enum=None;Hold;HoldAndDrain
+	// +kubebuilder:default="None"
+	StopPolicy *StopPolicy `json:"stopPolicy,omitempty"`
 }
 
 // ClusterQueueReference is the name of the ClusterQueue.

apis/kueue/v1beta1/stop_policy.go

@@ -0,0 +1,25 @@
+/*
+Copyright 2023 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1beta1
+
+type StopPolicy string
+
+const (
+	None         StopPolicy = "None"
+	HoldAndDrain StopPolicy = "HoldAndDrain"
+	Hold         StopPolicy = "Hold"
+)

apis/kueue/v1beta1/workload_types.go

@@ -330,6 +330,10 @@ const (
 )
 
 const (
+	// WorkloadInadmissible means that the Workload can't reserve quota
+	// due to LocalQueue or ClusterQueue doesn't exist or inactive.
+	WorkloadInadmissible = "Inadmissible"
+
 	// WorkloadEvictedByPreemption indicates that the workload was evicted
 	// in order to free resources for a workload with a higher priority.
 	WorkloadEvictedByPreemption = "Preempted"
@@ -346,6 +350,10 @@ const (
 	// because the ClusterQueue is Stopped.
 	WorkloadEvictedByClusterQueueStopped = "ClusterQueueStopped"
 
+	// WorkloadEvictedByLocalQueueStopped indicates that the workload was evicted
+	// because the LocalQueue is Stopped.
+	WorkloadEvictedByLocalQueueStopped = "LocalQueueStopped"
+
 	// WorkloadEvictedByDeactivation indicates that the workload was evicted
 	// because spec.active is set to false.
 	WorkloadEvictedByDeactivation = "InactiveWorkload"
@@ -361,6 +369,10 @@ const (
 	// WorkloadClusterQueueRestarted indicates that the workload was requeued because
 	// cluster queue was restarted after being stopped.
 	WorkloadClusterQueueRestarted = "ClusterQueueRestarted"
+
+	// WorkloadLocalQueueRestarted indicates that the workload was requeued because
+	// local queue was restarted after being stopped.
+	WorkloadLocalQueueRestarted = "LocalQueueRestarted"
 )
 
 const (

charts/kueue/templates/crd/kueue.x-k8s.io_localqueues.yaml

@@ -79,6 +79,24 @@ spec:
                 x-kubernetes-validations:
                 - message: field is immutable
                   rule: self == oldSelf
+              stopPolicy:
+                default: None
+                description: |-
+                  stopPolicy - if set to a value different from None, the LocalQueue is considered Inactive,
+                  no new reservation being made.
+
+
+                  Depending on its value, its associated workloads will:
+
+
+                  - None - Workloads are admitted
+                  - HoldAndDrain - Admitted workloads are evicted and Reserving workloads will cancel the reservation.
+                  - Hold - Admitted workloads will run to completion and Reserving workloads will cancel the reservation.
+                enum:
+                - None
+                - Hold
+                - HoldAndDrain
+                type: string
             type: object
           status:
             description: LocalQueueStatus defines the observed state of LocalQueue

config/components/crd/bases/kueue.x-k8s.io_localqueues.yaml

@@ -64,6 +64,24 @@ spec:
                 x-kubernetes-validations:
                 - message: field is immutable
                   rule: self == oldSelf
+              stopPolicy:
+                default: None
+                description: |-
+                  stopPolicy - if set to a value different from None, the LocalQueue is considered Inactive,
+                  no new reservation being made.
+
+
+                  Depending on its value, its associated workloads will:
+
+
+                  - None - Workloads are admitted
+                  - HoldAndDrain - Admitted workloads are evicted and Reserving workloads will cancel the reservation.
+                  - Hold - Admitted workloads will run to completion and Reserving workloads will cancel the reservation.
+                enum:
+                - None
+                - Hold
+                - HoldAndDrain
+                type: string
             type: object
           status:
             description: LocalQueueStatus defines the observed state of LocalQueue

pkg/controller/core/localqueue_controller.go

@@ -44,11 +44,13 @@ import (
 )
 
 const (
-	queueIsInactiveMsg      = "Can't submit new workloads to clusterQueue"
-	failedUpdateLqStatusMsg = "Failed to retrieve localQueue status"
+	localQueueIsInactiveMsg   = "Can't submit new workloads to localQueue"
+	clusterQueueIsInactiveMsg = "Can't submit new workloads to clusterQueue"
+	failedUpdateLqStatusMsg   = "Failed to retrieve localQueue status"
 )
 
 const (
+	localQueueIsInactiveReason   = "LocalQueueIsInactive"
 	clusterQueueIsInactiveReason = "ClusterQueueIsInactive"
 )
 
@@ -99,19 +101,25 @@ func (r *LocalQueueReconciler) Reconcile(ctx context.Context, req ctrl.Request)
 	ctx = ctrl.LoggerInto(ctx, log)
 	log.V(2).Info("Reconciling LocalQueue")
 
+	var err error
+	if ptr.Deref(queueObj.Spec.StopPolicy, kueue.None) != kueue.None {
+		err = r.UpdateStatusIfChanged(ctx, &queueObj, metav1.ConditionFalse, localQueueIsInactiveReason, localQueueIsInactiveMsg)
+		return ctrl.Result{}, client.IgnoreNotFound(err)
+	}
+
 	var cq kueue.ClusterQueue
-	err := r.client.Get(ctx, client.ObjectKey{Name: string(queueObj.Spec.ClusterQueue)}, &cq)
+	err = r.client.Get(ctx, client.ObjectKey{Name: string(queueObj.Spec.ClusterQueue)}, &cq)
 	if err != nil {
 		if apierrors.IsNotFound(err) {
-			err = r.UpdateStatusIfChanged(ctx, &queueObj, metav1.ConditionFalse, "ClusterQueueDoesNotExist", queueIsInactiveMsg)
+			err = r.UpdateStatusIfChanged(ctx, &queueObj, metav1.ConditionFalse, "ClusterQueueDoesNotExist", clusterQueueIsInactiveMsg)
 		}
 		return ctrl.Result{}, client.IgnoreNotFound(err)
 	}
 	if meta.IsStatusConditionTrue(cq.Status.Conditions, kueue.ClusterQueueActive) {
 		err = r.UpdateStatusIfChanged(ctx, &queueObj, metav1.ConditionTrue, "Ready", "Can submit new workloads to clusterQueue")
 		return ctrl.Result{}, client.IgnoreNotFound(err)
 	}
-	err = r.UpdateStatusIfChanged(ctx, &queueObj, metav1.ConditionFalse, clusterQueueIsInactiveReason, queueIsInactiveMsg)
+	err = r.UpdateStatusIfChanged(ctx, &queueObj, metav1.ConditionFalse, clusterQueueIsInactiveReason, clusterQueueIsInactiveMsg)
 	return ctrl.Result{}, client.IgnoreNotFound(err)
 }
 
@@ -123,6 +131,9 @@ func (r *LocalQueueReconciler) Create(e event.CreateEvent) bool {
 	}
 	log := r.log.WithValues("localQueue", klog.KObj(q))
 	log.V(2).Info("LocalQueue create event")
+	if ptr.Deref(q.Spec.StopPolicy, kueue.None) != kueue.None {
+		return true
+	}
 	ctx := logr.NewContext(context.Background(), log)
 	if err := r.queues.AddLocalQueue(ctx, q); err != nil {
 		log.Error(err, "Failed to add localQueue to the queueing system")
@@ -146,20 +157,45 @@ func (r *LocalQueueReconciler) Delete(e event.DeleteEvent) bool {
 }
 
 func (r *LocalQueueReconciler) Update(e event.UpdateEvent) bool {
-	q, match := e.ObjectNew.(*kueue.LocalQueue)
-	if !match {
+	oldLq, oldIsLq := e.ObjectOld.(*kueue.LocalQueue)
+	newLq, newIsLq := e.ObjectNew.(*kueue.LocalQueue)
+	if !oldIsLq || !newIsLq {
 		// No need to interact with the queue manager for other objects.
 		return true
 	}
-	log := r.log.WithValues("localQueue", klog.KObj(q))
+	log := r.log.WithValues("localQueue", klog.KObj(newLq))
 	log.V(2).Info("Queue update event")
-	if err := r.queues.UpdateLocalQueue(q); err != nil {
-		log.Error(err, "Failed to update queue in the queueing system")
+
+	oldStopPolicy := ptr.Deref(oldLq.Spec.StopPolicy, kueue.None)
+	newStopPolicy := ptr.Deref(newLq.Spec.StopPolicy, kueue.None)
+
+	if oldStopPolicy == kueue.None && newStopPolicy != kueue.None {
+		r.queues.DeleteLocalQueue(oldLq)
+		r.cache.DeleteLocalQueue(oldLq)
+		return true
+	}
+
+	if oldStopPolicy != kueue.None && newStopPolicy == kueue.None {
+		ctx := logr.NewContext(context.Background(), log)
+		if err := r.queues.AddLocalQueue(ctx, newLq); err != nil {
+			log.Error(err, "Failed to add localQueue to the queueing system")
+		}
+		if err := r.cache.AddLocalQueue(newLq); err != nil {
+			log.Error(err, "Failed to add localQueue to the cache")
+		}
+		return true
 	}
-	oldQ := e.ObjectOld.(*kueue.LocalQueue)
-	if err := r.cache.UpdateLocalQueue(oldQ, q); err != nil {
-		log.Error(err, "Failed to update localQueue in the cache")
+
+	if newStopPolicy == kueue.None {
+		if err := r.queues.UpdateLocalQueue(newLq); err != nil {
+			log.Error(err, "Failed to update queue in the queueing system")
+		}
+		oldQ := e.ObjectOld.(*kueue.LocalQueue)
+		if err := r.cache.UpdateLocalQueue(oldQ, newLq); err != nil {
+			log.Error(err, "Failed to update localQueue in the cache")
+		}
 	}
+
 	return true
 }
 
@@ -275,21 +311,29 @@ func (r *LocalQueueReconciler) UpdateStatusIfChanged(
 	reason, msg string,
 ) error {
 	oldStatus := queue.Status.DeepCopy()
-	pendingWls, err := r.queues.PendingWorkloads(queue)
-	if err != nil {
-		r.log.Error(err, failedUpdateLqStatusMsg)
-		return err
-	}
-	stats, err := r.cache.LocalQueueUsage(queue)
-	if err != nil {
-		r.log.Error(err, failedUpdateLqStatusMsg)
-		return err
+	if ptr.Deref(queue.Spec.StopPolicy, kueue.None) == kueue.None {
+		pendingWls, err := r.queues.PendingWorkloads(queue)
+		if err != nil {
+			r.log.Error(err, failedUpdateLqStatusMsg)
+			return err
+		}
+		stats, err := r.cache.LocalQueueUsage(queue)
+		if err != nil {
+			r.log.Error(err, failedUpdateLqStatusMsg)
+			return err
+		}
+		queue.Status.PendingWorkloads = pendingWls
+		queue.Status.ReservingWorkloads = int32(stats.ReservingWorkloads)
+		queue.Status.AdmittedWorkloads = int32(stats.AdmittedWorkloads)
+		queue.Status.FlavorsReservation = stats.ReservedResources
+		queue.Status.FlavorUsage = stats.AdmittedResources
+	} else {
+		queue.Status.PendingWorkloads = 0
+		queue.Status.ReservingWorkloads = 0
+		queue.Status.AdmittedWorkloads = 0
+		queue.Status.FlavorsReservation = nil
+		queue.Status.FlavorUsage = nil
 	}
-	queue.Status.PendingWorkloads = pendingWls
-	queue.Status.ReservingWorkloads = int32(stats.ReservingWorkloads)
-	queue.Status.AdmittedWorkloads = int32(stats.AdmittedWorkloads)
-	queue.Status.FlavorsReservation = stats.ReservedResources
-	queue.Status.FlavorUsage = stats.AdmittedResources
 	if len(conditionStatus) != 0 && len(reason) != 0 && len(msg) != 0 {
 		meta.SetStatusCondition(&queue.Status.Conditions, metav1.Condition{
 			Type:               kueue.LocalQueueActive,