inferencemodel_reconciler.go

/*
Copyright 2025 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 controller

import (
	"context"

	"github.com/go-logr/logr"
	"k8s.io/apimachinery/pkg/api/errors"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apimachinery/pkg/types"
	"k8s.io/client-go/tools/record"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/client"
	"sigs.k8s.io/controller-runtime/pkg/event"
	"sigs.k8s.io/controller-runtime/pkg/log"
	"sigs.k8s.io/controller-runtime/pkg/predicate"
	"sigs.k8s.io/gateway-api-inference-extension/api/v1alpha2"
	"sigs.k8s.io/gateway-api-inference-extension/pkg/epp/datastore"
	logutil "sigs.k8s.io/gateway-api-inference-extension/pkg/epp/util/logging"
)

type InferenceModelReconciler struct {
	client.Client
	Scheme             *runtime.Scheme
	Record             record.EventRecorder
	Datastore          datastore.Datastore
	PoolNamespacedName types.NamespacedName
}

func (c *InferenceModelReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
	logger := log.FromContext(ctx)
	loggerDefault := logger.V(logutil.DEFAULT)
	loggerDefault.Info("Reconciling InferenceModel", "name", req.NamespacedName)

	infModel := &v1alpha2.InferenceModel{}
	if err := c.Get(ctx, req.NamespacedName, infModel); err != nil {
		if errors.IsNotFound(err) {
			loggerDefault.Info("InferenceModel not found. Removing from datastore since object must be deleted", "name", req.NamespacedName)
			c.Datastore.ModelDelete(infModel.Spec.ModelName)
			return ctrl.Result{}, nil
		}
		loggerDefault.Error(err, "Unable to get InferenceModel", "name", req.NamespacedName)
		return ctrl.Result{}, err
	} else if !infModel.DeletionTimestamp.IsZero() {
		loggerDefault.Info("InferenceModel is marked for deletion. Removing from datastore", "name", req.NamespacedName)
		c.Datastore.ModelDelete(infModel.Spec.ModelName)
		return ctrl.Result{}, nil
	}

	c.updateDatastore(logger, infModel)
	return ctrl.Result{}, nil
}

func (c *InferenceModelReconciler) updateDatastore(logger logr.Logger, infModel *v1alpha2.InferenceModel) {
	loggerDefault := logger.V(logutil.DEFAULT)

	if infModel.Spec.PoolRef.Name == c.PoolNamespacedName.Name {
		loggerDefault.Info("Updating datastore", "poolRef", infModel.Spec.PoolRef, "serverPoolName", c.PoolNamespacedName)
		loggerDefault.Info("Adding/Updating InferenceModel", "modelName", infModel.Spec.ModelName)
		c.Datastore.ModelSet(infModel)
		return
	}
	loggerDefault.Info("Removing/Not adding InferenceModel", "modelName", infModel.Spec.ModelName)
	// If we get here. The model is not relevant to this pool, remove.
	c.Datastore.ModelDelete(infModel.Spec.ModelName)
}

func (c *InferenceModelReconciler) SetupWithManager(mgr ctrl.Manager) error {
	return ctrl.NewControllerManagedBy(mgr).
		For(&v1alpha2.InferenceModel{}).
		WithEventFilter(predicate.Funcs{
			CreateFunc: func(e event.CreateEvent) bool { return c.eventPredicate(e.Object.(*v1alpha2.InferenceModel)) },
			UpdateFunc: func(e event.UpdateEvent) bool {
				return c.eventPredicate(e.ObjectOld.(*v1alpha2.InferenceModel)) || c.eventPredicate(e.ObjectNew.(*v1alpha2.InferenceModel))
			},
			DeleteFunc:  func(e event.DeleteEvent) bool { return c.eventPredicate(e.Object.(*v1alpha2.InferenceModel)) },
			GenericFunc: func(e event.GenericEvent) bool { return c.eventPredicate(e.Object.(*v1alpha2.InferenceModel)) },
		}).
		Complete(c)
}

func (c *InferenceModelReconciler) eventPredicate(infModel *v1alpha2.InferenceModel) bool {
	return (infModel.Spec.PoolRef.Name == c.PoolNamespacedName.Name) && (infModel.GetNamespace() == c.PoolNamespacedName.Namespace)
}