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| 1 | +/* |
| 2 | +Copyright 2018 The Kubernetes Authors. |
| 3 | +
|
| 4 | +Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | +you may not use this file except in compliance with the License. |
| 6 | +You may obtain a copy of the License at |
| 7 | +
|
| 8 | + http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | +
|
| 10 | +Unless required by applicable law or agreed to in writing, software |
| 11 | +distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | +See the License for the specific language governing permissions and |
| 14 | +limitations under the License. |
| 15 | +*/ |
| 16 | + |
| 17 | +package noderef |
| 18 | + |
| 19 | +import ( |
| 20 | + "context" |
| 21 | + "encoding/base64" |
| 22 | + "fmt" |
| 23 | + |
| 24 | + "github.com/pkg/errors" |
| 25 | + corev1 "k8s.io/api/core/v1" |
| 26 | + apierrors "k8s.io/apimachinery/pkg/api/errors" |
| 27 | + "k8s.io/apimachinery/pkg/runtime" |
| 28 | + "k8s.io/klog" |
| 29 | + v1alpha1 "sigs.k8s.io/cluster-api/pkg/apis/cluster/v1alpha1" |
| 30 | + "sigs.k8s.io/controller-runtime/pkg/client" |
| 31 | + "sigs.k8s.io/controller-runtime/pkg/controller" |
| 32 | + "sigs.k8s.io/controller-runtime/pkg/handler" |
| 33 | + "sigs.k8s.io/controller-runtime/pkg/manager" |
| 34 | + "sigs.k8s.io/controller-runtime/pkg/reconcile" |
| 35 | + "sigs.k8s.io/controller-runtime/pkg/source" |
| 36 | +) |
| 37 | + |
| 38 | +// Add creates a new NodeRef Controller and adds it to the Manager with default RBAC. The Manager will set fields on the Controller |
| 39 | +// and Start it when the Manager is Started. |
| 40 | +func Add(mgr manager.Manager) error { |
| 41 | + return add(mgr, newReconciler(mgr)) |
| 42 | +} |
| 43 | + |
| 44 | +// newReconciler returns a new reconcile.Reconciler |
| 45 | +func newReconciler(mgr manager.Manager) reconcile.Reconciler { |
| 46 | + return &ReconcileNodeRef{Client: mgr.GetClient(), scheme: mgr.GetScheme()} |
| 47 | +} |
| 48 | + |
| 49 | +// add adds a new Controller to mgr with r as the reconcile.Reconciler |
| 50 | +func add(mgr manager.Manager, r reconcile.Reconciler) error { |
| 51 | + // Create a new controller |
| 52 | + c, err := controller.New("noderef-controller", mgr, controller.Options{Reconciler: r}) |
| 53 | + if err != nil { |
| 54 | + return err |
| 55 | + } |
| 56 | + |
| 57 | + // Watch for changes to NodeRef |
| 58 | + err = c.Watch(&source.Kind{Type: &v1alpha1.Machine{}}, &handler.EnqueueRequestForObject{}) |
| 59 | + if err != nil { |
| 60 | + return err |
| 61 | + } |
| 62 | + |
| 63 | + return nil |
| 64 | +} |
| 65 | + |
| 66 | +var _ reconcile.Reconciler = &ReconcileNodeRef{} |
| 67 | + |
| 68 | +// ReconcileNodeRef reconciles a NodeRef object |
| 69 | +type ReconcileNodeRef struct { |
| 70 | + client.Client |
| 71 | + scheme *runtime.Scheme |
| 72 | +} |
| 73 | + |
| 74 | +// Reconcile reads that state of the cluster for a Machine object and makes changes based on the state read |
| 75 | +// and what is in the Machine.Spec |
| 76 | +// +kubebuilder:rbac:groups=cluster.k8s.io,resources=machines,verbs=get;list;watch;create;update;patch;delete |
| 77 | +// +kubebuilder:rbac:groups=cluster.k8s.io,resources=machines/status,verbs=get;update;patch |
| 78 | +func (r *ReconcileNodeRef) Reconcile(request reconcile.Request) (reconcile.Result, error) { |
| 79 | + // Fetch the Machine instance |
| 80 | + machine := &v1alpha1.Machine{} |
| 81 | + err := r.Get(context.TODO(), request.NamespacedName, machine) |
| 82 | + if err != nil { |
| 83 | + if apierrors.IsNotFound(err) { |
| 84 | + return reconcile.Result{}, nil |
| 85 | + } |
| 86 | + return reconcile.Result{}, err |
| 87 | + } |
| 88 | + |
| 89 | + if machine.Status.NodeRef != nil { |
| 90 | + return reconcile.Result{}, nil |
| 91 | + } |
| 92 | + |
| 93 | + clusterName, ok := machine.Labels[v1alpha1.MachineClusterLabelName] |
| 94 | + if !ok { |
| 95 | + klog.Warningf("Cannot set noderef for Machine %q: missing cluster label", machine.Name) |
| 96 | + return reconcile.Result{}, nil |
| 97 | + } |
| 98 | + |
| 99 | + secret := &corev1.Secret{} |
| 100 | + secretKey := client.ObjectKey{ |
| 101 | + Namespace: machine.Namespace, |
| 102 | + Name: fmt.Sprintf("%s-kubeconfig", clusterName), |
| 103 | + } |
| 104 | + if err := r.Get(context.TODO(), secretKey, secret); err != nil { |
| 105 | + if apierrors.IsNotFound(err) { |
| 106 | + klog.Warningf("Cannot set noderef for Machine %q, required secret %v not found", machine.Name, secretKey) |
| 107 | + return reconcile.Result{}, nil |
| 108 | + } |
| 109 | + return reconcile.Result{}, err |
| 110 | + } |
| 111 | + |
| 112 | + encodedKubeconfig, ok := secret.Data["value"] |
| 113 | + if !ok { |
| 114 | + klog.Warningf("Cannot set noderef for Machine %q: missing value in secret %q", machine.Name, secretKey) |
| 115 | + return reconcile.Result{}, nil |
| 116 | + } |
| 117 | + |
| 118 | + _, err = base64.StdEncoding.DecodeString(string(encodedKubeconfig)) |
| 119 | + if err != nil { |
| 120 | + return reconcile.Result{}, errors.Wrapf(err, "Cannot decode kubeconfig secret %q", secretKey) |
| 121 | + } |
| 122 | + |
| 123 | + return reconcile.Result{}, nil |
| 124 | +} |
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