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| 1 | +/* |
| 2 | +SPDX-FileCopyrightText: Copyright 2025 SAP SE or an SAP affiliate company and cobaltcore-dev contributors |
| 3 | +SPDX-License-Identifier: Apache-2.0 |
| 4 | +
|
| 5 | +Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | +you may not use this file except in compliance with the License. |
| 7 | +You may obtain a copy of the License at |
| 8 | +
|
| 9 | + http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | +
|
| 11 | +Unless required by applicable law or agreed to in writing, software |
| 12 | +distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | +See the License for the specific language governing permissions and |
| 15 | +limitations under the License. |
| 16 | +*/ |
| 17 | + |
| 18 | +package controller |
| 19 | + |
| 20 | +import ( |
| 21 | + "context" |
| 22 | + "fmt" |
| 23 | + |
| 24 | + corev1 "k8s.io/api/core/v1" |
| 25 | + k8serrors "k8s.io/apimachinery/pkg/api/errors" |
| 26 | + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" |
| 27 | + "k8s.io/apimachinery/pkg/runtime" |
| 28 | + ctrl "sigs.k8s.io/controller-runtime" |
| 29 | + k8sclient "sigs.k8s.io/controller-runtime/pkg/client" |
| 30 | + "sigs.k8s.io/controller-runtime/pkg/controller/controllerutil" |
| 31 | + logger "sigs.k8s.io/controller-runtime/pkg/log" |
| 32 | + "sigs.k8s.io/controller-runtime/pkg/predicate" |
| 33 | + |
| 34 | + kvmv1alpha1 "github.com/cobaltcore-dev/kvm-node-agent/api/v1alpha1" |
| 35 | +) |
| 36 | + |
| 37 | +type HypervisorController struct { |
| 38 | + k8sclient.Client |
| 39 | + Scheme *runtime.Scheme |
| 40 | +} |
| 41 | + |
| 42 | +// +kubebuilder:rbac:groups="",resources=nodes,verbs=get;list;watch |
| 43 | +// +kubebuilder:rbac:groups="",resources=nodes/status,verbs=get |
| 44 | +// +kubebuilder:rbac:groups=kvm.cloud.sap,resources=hypervisors,verbs=get;list;watch;create;delete |
| 45 | +func (hv *HypervisorController) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) { |
| 46 | + log := logger.FromContext(ctx).WithName(req.Name) |
| 47 | + |
| 48 | + node := &corev1.Node{} |
| 49 | + if err := hv.Get(ctx, req.NamespacedName, node); err != nil { |
| 50 | + // Ignore not found errors, could be deleted |
| 51 | + return ctrl.Result{}, k8sclient.IgnoreNotFound(err) |
| 52 | + } |
| 53 | + |
| 54 | + hypervisor := &kvmv1alpha1.Hypervisor{ |
| 55 | + ObjectMeta: metav1.ObjectMeta{ |
| 56 | + Name: node.Name, |
| 57 | + Labels: map[string]string{ |
| 58 | + corev1.LabelHostname: node.Name, |
| 59 | + }, |
| 60 | + }, |
| 61 | + } |
| 62 | + |
| 63 | + // Ensure corresponding hypervisor exists |
| 64 | + log.Info("Reconcile", "name", req.Name, "namespace", req.Namespace) |
| 65 | + if err := hv.Get(ctx, k8sclient.ObjectKeyFromObject(hypervisor), hypervisor); err != nil { |
| 66 | + if k8serrors.IsNotFound(err) { |
| 67 | + // attach ownerReference for cascading deletion |
| 68 | + if err = controllerutil.SetControllerReference(node, hypervisor, hv.Scheme); err != nil { |
| 69 | + return ctrl.Result{}, fmt.Errorf("failed setting controller reference: %w", err) |
| 70 | + } |
| 71 | + |
| 72 | + log.Info("Setup hypervisor", "name", node.Name) |
| 73 | + if err = hv.Create(ctx, hypervisor); err != nil { |
| 74 | + return ctrl.Result{}, err |
| 75 | + } |
| 76 | + |
| 77 | + // Requeue to update status |
| 78 | + return ctrl.Result{}, nil |
| 79 | + } |
| 80 | + |
| 81 | + return ctrl.Result{}, err |
| 82 | + } |
| 83 | + |
| 84 | + if node.ObjectMeta.DeletionTimestamp != nil { |
| 85 | + // node is being deleted, cleanup hypervisor |
| 86 | + if err := hv.Delete(ctx, hypervisor); k8sclient.IgnoreNotFound(err) != nil { |
| 87 | + return ctrl.Result{}, fmt.Errorf("failed cleaning up hypervisor: %w", err) |
| 88 | + } |
| 89 | + } |
| 90 | + |
| 91 | + return ctrl.Result{}, nil |
| 92 | +} |
| 93 | + |
| 94 | +func (hv *HypervisorController) SetupWithManager(mgr ctrl.Manager) error { |
| 95 | + novaVirtLabeledPredicate, err := predicate.LabelSelectorPredicate(metav1.LabelSelector{ |
| 96 | + MatchLabels: map[string]string{ |
| 97 | + labelNovaVirtDriver: "true", |
| 98 | + }, |
| 99 | + }) |
| 100 | + if err != nil { |
| 101 | + return fmt.Errorf("failed to create label selector predicate: %w", err) |
| 102 | + } |
| 103 | + |
| 104 | + return ctrl.NewControllerManagedBy(mgr). |
| 105 | + For(&corev1.Node{}). |
| 106 | + Owns(&kvmv1alpha1.Hypervisor{}). |
| 107 | + WithEventFilter(novaVirtLabeledPredicate). |
| 108 | + Complete(hv) |
| 109 | +} |
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