/
kserve_metrics_service_reconciler.go
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/
kserve_metrics_service_reconciler.go
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/*
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 reconcilers
import (
"context"
"github.com/go-logr/logr"
kservev1beta1 "github.com/kserve/kserve/pkg/apis/serving/v1beta1"
"github.com/opendatahub-io/odh-model-controller/controllers/comparators"
"github.com/opendatahub-io/odh-model-controller/controllers/processors"
"github.com/opendatahub-io/odh-model-controller/controllers/resources"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/intstr"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
)
const (
inferenceServiceLabelName = "serving.kserve.io/inferenceservice"
)
var _ SubResourceReconciler = (*KserveMetricsServiceReconciler)(nil)
type KserveMetricsServiceReconciler struct {
NoResourceRemoval
client client.Client
serviceHandler resources.ServiceHandler
deltaProcessor processors.DeltaProcessor
}
func NewKServeMetricsServiceReconciler(client client.Client) *KserveMetricsServiceReconciler {
return &KserveMetricsServiceReconciler{
client: client,
serviceHandler: resources.NewServiceHandler(client),
deltaProcessor: processors.NewDeltaProcessor(),
}
}
func (r *KserveMetricsServiceReconciler) Reconcile(ctx context.Context, log logr.Logger, isvc *kservev1beta1.InferenceService) error {
log.V(1).Info("Reconciling Metrics Service for InferenceService")
// Create Desired resource
desiredResource, err := r.createDesiredResource(log, isvc)
if err != nil {
return err
}
// Get Existing resource
existingResource, err := r.getExistingResource(ctx, log, isvc)
if err != nil {
return err
}
// Process Delta
if err = r.processDelta(ctx, log, desiredResource, existingResource); err != nil {
return err
}
return nil
}
func (r *KserveMetricsServiceReconciler) createDesiredResource(log logr.Logger, isvc *kservev1beta1.InferenceService) (*v1.Service, error) {
metricsService := &v1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: getMetricsServiceName(isvc),
Namespace: isvc.Namespace,
Labels: map[string]string{
"name": getMetricsServiceName(isvc),
},
},
Spec: v1.ServiceSpec{
Ports: []v1.ServicePort{
{
Name: "caikit-metrics",
Protocol: v1.ProtocolTCP,
Port: 8086,
TargetPort: intstr.FromInt(8086),
},
{
Name: "tgis-metrics",
Protocol: v1.ProtocolTCP,
Port: 3000,
TargetPort: intstr.FromInt(3000),
},
},
Type: v1.ServiceTypeClusterIP,
Selector: map[string]string{
inferenceServiceLabelName: isvc.Name,
},
},
}
if err := ctrl.SetControllerReference(isvc, metricsService, r.client.Scheme()); err != nil {
log.Error(err, "Unable to add OwnerReference to the Metrics Service")
return nil, err
}
return metricsService, nil
}
func (r *KserveMetricsServiceReconciler) getExistingResource(ctx context.Context, log logr.Logger, isvc *kservev1beta1.InferenceService) (*v1.Service, error) {
return r.serviceHandler.FetchService(ctx, log, types.NamespacedName{Name: getMetricsServiceName(isvc), Namespace: isvc.Namespace})
}
func (r *KserveMetricsServiceReconciler) processDelta(ctx context.Context, log logr.Logger, desiredService *v1.Service, existingService *v1.Service) (err error) {
comparator := comparators.GetServiceComparator()
delta := r.deltaProcessor.ComputeDelta(comparator, desiredService, existingService)
if !delta.HasChanges() {
log.V(1).Info("No delta found")
return nil
}
if delta.IsAdded() {
log.V(1).Info("Delta found", "create", desiredService.GetName())
if err = r.client.Create(ctx, desiredService); err != nil {
return
}
}
if delta.IsUpdated() {
log.V(1).Info("Delta found", "update", existingService.GetName())
rp := existingService.DeepCopy()
rp.Annotations = desiredService.Annotations
rp.Labels = desiredService.Labels
rp.Spec = desiredService.Spec
if err = r.client.Update(ctx, rp); err != nil {
return
}
}
if delta.IsRemoved() {
log.V(1).Info("Delta found", "delete", existingService.GetName())
if err = r.client.Delete(ctx, existingService); err != nil {
return
}
}
return nil
}
func getMetricsServiceName(isvc *kservev1beta1.InferenceService) string {
return isvc.Name + "-metrics"
}