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| 1 | +// SPDX-FileCopyrightText: 2025 The Kepler Authors |
| 2 | +// SPDX-License-Identifier: Apache-2.0 |
| 3 | + |
| 4 | +package controller |
| 5 | + |
| 6 | +import ( |
| 7 | + "context" |
| 8 | + "time" |
| 9 | + |
| 10 | + "github.com/go-logr/logr" |
| 11 | + "sigs.k8s.io/controller-runtime/pkg/builder" |
| 12 | + "sigs.k8s.io/controller-runtime/pkg/client" |
| 13 | + "sigs.k8s.io/controller-runtime/pkg/log" |
| 14 | + "sigs.k8s.io/controller-runtime/pkg/predicate" |
| 15 | + |
| 16 | + powermonitor "github.com/sustainable.computing.io/kepler-operator/pkg/components/power-monitor" |
| 17 | + "github.com/sustainable.computing.io/kepler-operator/pkg/reconciler" |
| 18 | + |
| 19 | + "k8s.io/apimachinery/pkg/api/errors" |
| 20 | + "k8s.io/apimachinery/pkg/runtime" |
| 21 | + "sigs.k8s.io/controller-runtime/pkg/event" |
| 22 | + |
| 23 | + corev1 "k8s.io/api/core/v1" |
| 24 | + |
| 25 | + ctrl "sigs.k8s.io/controller-runtime" |
| 26 | +) |
| 27 | + |
| 28 | +type TokenExpiryReconciler struct { |
| 29 | + client.Client |
| 30 | + Scheme *runtime.Scheme |
| 31 | + logger logr.Logger |
| 32 | +} |
| 33 | + |
| 34 | +// RBAC for TokenExpirationReconciler |
| 35 | +//+kubebuilder:rbac:groups=core,resources=secrets,verbs=get;list;watch;delete |
| 36 | + |
| 37 | +// SetupWithManager sets up the controller with the Manager. |
| 38 | +func (r *TokenExpiryReconciler) SetupWithManager(mgr ctrl.Manager) error { |
| 39 | + secretPredicate := builder.WithPredicates(predicate.Funcs{ |
| 40 | + CreateFunc: func(e event.CreateEvent) bool { |
| 41 | + return r.inPowerMonitorNamespace(e.Object) && r.isPrometheusUserWorkloadToken(e.Object) |
| 42 | + }, |
| 43 | + UpdateFunc: func(e event.UpdateEvent) bool { |
| 44 | + return r.inPowerMonitorNamespace(e.ObjectNew) && r.isPrometheusUserWorkloadToken(e.ObjectNew) |
| 45 | + }, |
| 46 | + DeleteFunc: func(e event.DeleteEvent) bool { |
| 47 | + return false |
| 48 | + }, |
| 49 | + GenericFunc: func(e event.GenericEvent) bool { |
| 50 | + return r.inPowerMonitorNamespace(e.Object) && r.isPrometheusUserWorkloadToken(e.Object) |
| 51 | + }, |
| 52 | + }) |
| 53 | + |
| 54 | + return ctrl.NewControllerManagedBy(mgr). |
| 55 | + For(&corev1.Secret{}, secretPredicate). |
| 56 | + Complete(r) |
| 57 | +} |
| 58 | + |
| 59 | +// inPowerMonitorNamespace checks if object is in the PowerMonitorDeploymentNS namespace |
| 60 | +func (r *TokenExpiryReconciler) inPowerMonitorNamespace(obj client.Object) bool { |
| 61 | + return obj.GetNamespace() == PowerMonitorDeploymentNS |
| 62 | +} |
| 63 | + |
| 64 | +// isPrometheusUserWorkloadToken checks if the secret is the prometheus-user-workload-token |
| 65 | +func (r *TokenExpiryReconciler) isPrometheusUserWorkloadToken(obj client.Object) bool { |
| 66 | + return obj.GetName() == powermonitor.SecretUWMTokenName |
| 67 | +} |
| 68 | + |
| 69 | +// hasExpirationAnnotation checks if the secret has an expiration annotation |
| 70 | +func (r *TokenExpiryReconciler) hasExpirationAnnotation(obj client.Object) bool { |
| 71 | + secret, ok := obj.(*corev1.Secret) |
| 72 | + if !ok { |
| 73 | + return false |
| 74 | + } |
| 75 | + |
| 76 | + annotations := secret.GetAnnotations() |
| 77 | + if annotations == nil { |
| 78 | + return false |
| 79 | + } |
| 80 | + |
| 81 | + _, exists := annotations[powermonitor.SecretTokenExpirationAnnotation] |
| 82 | + return exists |
| 83 | +} |
| 84 | + |
| 85 | +// deleteResources is a helper function that creates and runs deleter reconcilers for the given resources |
| 86 | +func (r *TokenExpiryReconciler) deleteResources(ctx context.Context, resources ...client.Object) (ctrl.Result, error) { |
| 87 | + reconcilers := resourceReconcilers(deleteResource, resources...) |
| 88 | + |
| 89 | + return reconciler.Runner{ |
| 90 | + Reconcilers: reconcilers, |
| 91 | + Client: r.Client, |
| 92 | + Scheme: r.Scheme, |
| 93 | + Logger: r.logger, |
| 94 | + }.Run(ctx) |
| 95 | +} |
| 96 | + |
| 97 | +func (r *TokenExpiryReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) { |
| 98 | + logger := log.FromContext(ctx) |
| 99 | + r.logger = logger |
| 100 | + |
| 101 | + logger.Info("Start of reconcile") |
| 102 | + defer logger.Info("End of reconcile") |
| 103 | + |
| 104 | + secret := &corev1.Secret{} |
| 105 | + err := r.Get(ctx, req.NamespacedName, secret) |
| 106 | + if err != nil { |
| 107 | + if errors.IsNotFound(err) { |
| 108 | + r.logger.Info("secret not found, continue without error") |
| 109 | + return ctrl.Result{}, nil |
| 110 | + } |
| 111 | + r.logger.Error(err, "failed to retrieve secret") |
| 112 | + return ctrl.Result{}, err |
| 113 | + } |
| 114 | + |
| 115 | + if !r.hasExpirationAnnotation(secret) { |
| 116 | + r.logger.Info("prometheus-user-workload-token does not have expiration annotation, deleting it") |
| 117 | + return r.deleteResources(ctx, secret) |
| 118 | + } |
| 119 | + |
| 120 | + expired, expirationTime, err := r.isSecretExpired(secret) |
| 121 | + if err != nil { |
| 122 | + r.logger.Error(err, "failed to extract expiration time") |
| 123 | + return ctrl.Result{RequeueAfter: time.Minute * 5}, nil |
| 124 | + } |
| 125 | + |
| 126 | + if expired { |
| 127 | + r.logger.Info("secret has expired, reconciling", "expiration-time", expirationTime) |
| 128 | + return r.deleteResources(ctx, secret) |
| 129 | + } |
| 130 | + |
| 131 | + timeUntilExpiration := time.Until(expirationTime) |
| 132 | + r.logger.Info("secret not expired yet, requeuing", "expiration-time", expirationTime, "time-until-expiration", timeUntilExpiration) |
| 133 | + |
| 134 | + return ctrl.Result{RequeueAfter: Config.TokenRefreshInterval}, nil |
| 135 | +} |
| 136 | + |
| 137 | +// isSecretExpired checks if the secret has expired according to the expiration annotation |
| 138 | +func (r *TokenExpiryReconciler) isSecretExpired(secret *corev1.Secret) (bool, time.Time, error) { |
| 139 | + expirationTime, err := powermonitor.GetExpirationFromAnnotation(&secret.ObjectMeta, powermonitor.SecretTokenExpirationAnnotation) |
| 140 | + if err != nil { |
| 141 | + return false, time.Time{}, err |
| 142 | + } |
| 143 | + if expirationTime == nil { |
| 144 | + return false, time.Time{}, nil |
| 145 | + } |
| 146 | + return time.Now().After(expirationTime.Add(-(Config.TokenRefreshInterval * 2))), *expirationTime, nil |
| 147 | +} |
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