98 lines
3.1 KiB
Go
98 lines
3.1 KiB
Go
/*
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Copyright 2023 The Karmada Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package hpareplicassyncer
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import (
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autoscalingv2 "k8s.io/api/autoscaling/v2"
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"k8s.io/klog/v2"
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"sigs.k8s.io/controller-runtime/pkg/event"
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"sigs.k8s.io/controller-runtime/pkg/predicate"
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policyv1alpha1 "github.com/karmada-io/karmada/pkg/apis/policy/v1alpha1"
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)
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var _ predicate.Predicate = &HPAReplicasSyncer{}
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// Create implements CreateEvent filter
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func (r *HPAReplicasSyncer) Create(e event.CreateEvent) bool {
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hpa, ok := e.Object.(*autoscalingv2.HorizontalPodAutoscaler)
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if !ok {
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klog.Errorf("create predicates in hpa controller called, but obj is not hpa type")
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return false
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}
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// if hpa exist and has been propagated, add label to its scale ref resource
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if hasBeenPropagated(hpa) {
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r.scaleRefWorker.Add(labelEvent{addLabelEvent, hpa})
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}
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return false
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}
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// Update implements UpdateEvent filter
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func (r *HPAReplicasSyncer) Update(e event.UpdateEvent) bool {
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oldHPA, ok := e.ObjectOld.(*autoscalingv2.HorizontalPodAutoscaler)
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if !ok {
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klog.Errorf("update predicates in hpa controller called, but old obj is not hpa type")
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return false
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}
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newHPA, ok := e.ObjectNew.(*autoscalingv2.HorizontalPodAutoscaler)
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if !ok {
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klog.Errorf("update predicates in hpa controller called, but new obj is not hpa type")
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return false
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}
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// hpa scale ref changed, remove old hpa label and add to new hpa
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if oldHPA.Spec.ScaleTargetRef.String() != newHPA.Spec.ScaleTargetRef.String() {
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// if scale ref has label, remove label, otherwise skip
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r.scaleRefWorker.Add(labelEvent{deleteLabelEvent, oldHPA})
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}
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// if new hpa exist and has been propagated, add label to its scale ref resource
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if hasBeenPropagated(newHPA) {
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r.scaleRefWorker.Add(labelEvent{addLabelEvent, newHPA})
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}
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return oldHPA.Status.DesiredReplicas != newHPA.Status.DesiredReplicas
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}
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// Delete implements DeleteEvent filter
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func (r *HPAReplicasSyncer) Delete(e event.DeleteEvent) bool {
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hpa, ok := e.Object.(*autoscalingv2.HorizontalPodAutoscaler)
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if !ok {
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klog.Errorf("delete predicates in hpa controller called, but obj is not hpa type")
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return false
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}
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// if scale ref has label, remove label, otherwise skip
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r.scaleRefWorker.Add(labelEvent{deleteLabelEvent, hpa})
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return false
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}
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// Generic implements default GenericEvent filter
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func (r *HPAReplicasSyncer) Generic(_ event.GenericEvent) bool {
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return false
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}
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func hasBeenPropagated(hpa *autoscalingv2.HorizontalPodAutoscaler) bool {
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_, ppExist := hpa.GetLabels()[policyv1alpha1.PropagationPolicyNameLabel]
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_, cppExist := hpa.GetLabels()[policyv1alpha1.ClusterPropagationPolicyLabel]
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return ppExist || cppExist
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}
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