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add replicas syncer for resources with HPA
Signed-off-by: lxtywypc <[email protected]>
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artifacts/deploy/karmada-controller-manager-cert-secret.yaml
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,11 @@ | ||
| apiVersion: v1 | ||
| kind: Secret | ||
| metadata: | ||
| name: controller-manager-cert | ||
| namespace: karmada-system | ||
| type: kubernetes.io/tls | ||
| data: | ||
| tls.crt: | | ||
| {{server_certificate}} | ||
| tls.key: | | ||
| {{server_key}} |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| package replicassyncer | ||
|
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| import ( | ||
| "context" | ||
|
|
||
| autoscalingv1 "k8s.io/api/autoscaling/v1" | ||
| autoscalingv2 "k8s.io/api/autoscaling/v2" | ||
| "k8s.io/apimachinery/pkg/api/errors" | ||
| "k8s.io/apimachinery/pkg/api/meta" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/apimachinery/pkg/runtime/schema" | ||
| "k8s.io/client-go/scale" | ||
| "k8s.io/klog/v2" | ||
| controllerruntime "sigs.k8s.io/controller-runtime" | ||
| "sigs.k8s.io/controller-runtime/pkg/builder" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| "sigs.k8s.io/controller-runtime/pkg/event" | ||
| "sigs.k8s.io/controller-runtime/pkg/handler" | ||
| "sigs.k8s.io/controller-runtime/pkg/source" | ||
| ) | ||
|
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| type ReplicasSyncer struct { | ||
| hostClient client.Client | ||
| mapper meta.RESTMapper | ||
| scaleClient scale.ScalesGetter | ||
|
|
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| GenericChan chan<- event.GenericEvent | ||
| } | ||
|
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| func NewReplicasSyncer(hostClient client.Client, mapper meta.RESTMapper, scaleClient scale.ScalesGetter) *ReplicasSyncer { | ||
| return &ReplicasSyncer{ | ||
| hostClient: hostClient, | ||
| mapper: mapper, | ||
| scaleClient: scaleClient, | ||
| } | ||
| } | ||
|
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| func (r *ReplicasSyncer) SetupWithManager(mgr controllerruntime.Manager) error { | ||
| ch := make(chan event.GenericEvent) | ||
| r.GenericChan = ch | ||
| return controllerruntime.NewControllerManagedBy(mgr).Named("replicas-syncer"). | ||
| For(&autoscalingv2.HorizontalPodAutoscaler{}, | ||
| builder.WithPredicates(HPAPredicate)). | ||
| WatchesRawSource(&source.Channel{Source: ch}, &handler.EnqueueRequestForObject{}, builder.WithPredicates(HPAPredicate)). | ||
| Complete(r) | ||
| } | ||
|
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| func (r *ReplicasSyncer) Reconcile(ctx context.Context, req controllerruntime.Request) (controllerruntime.Result, error) { | ||
| klog.V(4).Infof("Reconciling for HPA %s/%s", req.Namespace, req.Name) | ||
|
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| hpa := &autoscalingv2.HorizontalPodAutoscaler{} | ||
| err := r.hostClient.Get(ctx, req.NamespacedName, hpa) | ||
| if err != nil { | ||
| if errors.IsNotFound(err) { | ||
| return controllerruntime.Result{}, nil | ||
| } | ||
|
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| return controllerruntime.Result{}, err | ||
| } | ||
|
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| workloadGR, scale, err := GetGroupResourceAndScaleForWorkloadFromHPA(ctx, r.mapper, r.scaleClient, hpa) | ||
| if err != nil { | ||
| return controllerruntime.Result{}, err | ||
| } | ||
|
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| // If the scale of workload is not found, skip processing. | ||
| if scale == nil { | ||
| klog.Infof("Scale of resource(kind=%s, %s/%s) not found, the resource might have been removed, skip", | ||
| hpa.Spec.ScaleTargetRef.Kind, hpa.Namespace, hpa.Spec.ScaleTargetRef.Name) | ||
|
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| return controllerruntime.Result{}, nil | ||
| } | ||
|
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| err = r.updateScaleIfNeed(ctx, workloadGR, scale, hpa) | ||
| if err != nil { | ||
| return controllerruntime.Result{}, err | ||
| } | ||
|
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| return controllerruntime.Result{}, nil | ||
| } | ||
|
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| // updateScaleIfNeed would update the scale of workload on fed-control plane | ||
| // if the replicas decared in the workload on fed-control-plane dose not match | ||
| // the actual replicas in member clusters effected by HPA. | ||
| func (r *ReplicasSyncer) updateScaleIfNeed(ctx context.Context, workloadGR schema.GroupResource, scale *autoscalingv1.Scale, hpa *autoscalingv2.HorizontalPodAutoscaler) error { | ||
| if scale.Spec.Replicas != hpa.Status.CurrentReplicas { | ||
| oldReplicas := scale.Spec.Replicas | ||
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| scale.Spec.Replicas = hpa.Status.CurrentReplicas | ||
| _, err := r.scaleClient.Scales(hpa.Namespace).Update(ctx, workloadGR, scale, metav1.UpdateOptions{}) | ||
| if err != nil { | ||
| klog.Errorf("Failed to try to sync scale for resource(kind=%s, %s/%s) from %d to %d: %v", | ||
| hpa.Spec.ScaleTargetRef.Kind, hpa.Namespace, hpa.Spec.ScaleTargetRef.Name, oldReplicas, hpa.Status.CurrentReplicas, err) | ||
| return err | ||
| } | ||
|
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| klog.Infof("Successfully synced scale for resource(kind=%s, %s/%s) from %d to %d", | ||
| hpa.Spec.ScaleTargetRef.Kind, hpa.Namespace, hpa.Spec.ScaleTargetRef.Name, oldReplicas, hpa.Status.CurrentReplicas) | ||
| } | ||
|
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| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,3 @@ | ||
| package replicassyncer | ||
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| // TODO(@lxtywypc): Add unit test. |
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