|
| 1 | +/* |
| 2 | +Copyright 2019 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 | + "time" |
| 22 | + |
| 23 | + "github.com/pkg/errors" |
| 24 | + apicorev1 "k8s.io/api/core/v1" |
| 25 | + apierrors "k8s.io/apimachinery/pkg/api/errors" |
| 26 | + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" |
| 27 | + "k8s.io/apimachinery/pkg/runtime" |
| 28 | + corev1 "k8s.io/client-go/kubernetes/typed/core/v1" |
| 29 | + "k8s.io/klog" |
| 30 | + "sigs.k8s.io/cluster-api/pkg/apis/cluster/v1alpha1" |
| 31 | + "sigs.k8s.io/cluster-api/pkg/controller/noderefutil" |
| 32 | + "sigs.k8s.io/cluster-api/pkg/controller/remote" |
| 33 | + "sigs.k8s.io/controller-runtime/pkg/client" |
| 34 | + "sigs.k8s.io/controller-runtime/pkg/controller" |
| 35 | + "sigs.k8s.io/controller-runtime/pkg/handler" |
| 36 | + "sigs.k8s.io/controller-runtime/pkg/manager" |
| 37 | + "sigs.k8s.io/controller-runtime/pkg/reconcile" |
| 38 | + "sigs.k8s.io/controller-runtime/pkg/source" |
| 39 | +) |
| 40 | + |
| 41 | +var ( |
| 42 | + ErrNodeNotFound = errors.New("cannot find node with maching ProviderID") |
| 43 | +) |
| 44 | + |
| 45 | +// Add creates a new NodeRef Controller and adds it to the Manager with default RBAC. The Manager will set fields on the Controller |
| 46 | +// and Start it when the Manager is Started. |
| 47 | +func Add(mgr manager.Manager) error { |
| 48 | + return add(mgr, newReconciler(mgr)) |
| 49 | +} |
| 50 | + |
| 51 | +// newReconciler returns a new reconcile.Reconciler |
| 52 | +func newReconciler(mgr manager.Manager) reconcile.Reconciler { |
| 53 | + return &ReconcileNodeRef{Client: mgr.GetClient(), scheme: mgr.GetScheme()} |
| 54 | +} |
| 55 | + |
| 56 | +// add adds a new Controller to mgr with r as the reconcile.Reconciler |
| 57 | +func add(mgr manager.Manager, r reconcile.Reconciler) error { |
| 58 | + // Create a new controller |
| 59 | + c, err := controller.New("noderef-controller", mgr, controller.Options{Reconciler: r}) |
| 60 | + if err != nil { |
| 61 | + return err |
| 62 | + } |
| 63 | + |
| 64 | + // Watch for changes to Machines. |
| 65 | + return c.Watch(&source.Kind{Type: &v1alpha1.Machine{}}, &handler.EnqueueRequestForObject{}) |
| 66 | +} |
| 67 | + |
| 68 | +var _ reconcile.Reconciler = &ReconcileNodeRef{} |
| 69 | + |
| 70 | +// ReconcileNodeRef reconciles a Machine object. |
| 71 | +type ReconcileNodeRef struct { |
| 72 | + client.Client |
| 73 | + scheme *runtime.Scheme |
| 74 | +} |
| 75 | + |
| 76 | +// Reconcile watches Machines. |
| 77 | +// +kubebuilder:rbac:groups=,resources=secrets,verbs=get |
| 78 | +func (r *ReconcileNodeRef) Reconcile(request reconcile.Request) (reconcile.Result, error) { |
| 79 | + // Fetch the NodeRef 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 | + // Check that the Machine hasn't been deleted or in the process. |
| 90 | + if !machine.DeletionTimestamp.IsZero() { |
| 91 | + return reconcile.Result{}, nil |
| 92 | + } |
| 93 | + |
| 94 | + // Check that the Machine doesn't already have a NodeRef. |
| 95 | + if machine.Status.NodeRef != nil { |
| 96 | + return reconcile.Result{}, nil |
| 97 | + } |
| 98 | + |
| 99 | + // Check that the Machine has a cluster label. |
| 100 | + if machine.Labels[v1alpha1.MachineClusterLabelName] == "" { |
| 101 | + klog.Warningf("Machine %q in namespace %q doesn't specify %q label, cannot set nodeRef", machine.Name, machine.Namespace, v1alpha1.MachineClusterLabelName) |
| 102 | + return reconcile.Result{}, nil |
| 103 | + } |
| 104 | + |
| 105 | + // Check that the Machine has a valid ProviderID. |
| 106 | + if machine.Spec.ProviderID == nil || *machine.Spec.ProviderID == "" { |
| 107 | + klog.Warningf("Machine %q in namespace %q doesn't have a valid ProviderID, cannot set nodeRef", machine.Name, machine.Namespace) |
| 108 | + return reconcile.Result{}, nil |
| 109 | + } |
| 110 | + |
| 111 | + providerID, err := noderefutil.NewProviderID(*machine.Spec.ProviderID) |
| 112 | + if err != nil { |
| 113 | + return reconcile.Result{}, err |
| 114 | + } |
| 115 | + |
| 116 | + cluster, err := r.getCluster(context.TODO(), machine) |
| 117 | + if err != nil { |
| 118 | + return reconcile.Result{}, err |
| 119 | + } |
| 120 | + |
| 121 | + clusterClient, err := remote.NewClusterClient(r.Client, cluster) |
| 122 | + if err != nil { |
| 123 | + return reconcile.Result{}, err |
| 124 | + } |
| 125 | + |
| 126 | + corev1Client, err := clusterClient.CoreV1() |
| 127 | + if err != nil { |
| 128 | + return reconcile.Result{}, err |
| 129 | + } |
| 130 | + |
| 131 | + // Get the Node reference. |
| 132 | + nodeRef, err := r.getNodeReference(corev1Client, providerID) |
| 133 | + if err != nil { |
| 134 | + if err == ErrNodeNotFound { |
| 135 | + return reconcile.Result{RequeueAfter: 10 * time.Second}, nil |
| 136 | + } |
| 137 | + return reconcile.Result{}, err |
| 138 | + } |
| 139 | + |
| 140 | + // Update Machine. |
| 141 | + machine.Status.NodeRef = nodeRef |
| 142 | + if err := r.Client.Update(context.TODO(), machine); err != nil { |
| 143 | + return reconcile.Result{}, err |
| 144 | + } |
| 145 | + |
| 146 | + return reconcile.Result{}, nil |
| 147 | +} |
| 148 | + |
| 149 | +func (r *ReconcileNodeRef) getCluster(ctx context.Context, machine *v1alpha1.Machine) (*v1alpha1.Cluster, error) { |
| 150 | + cluster := &v1alpha1.Cluster{} |
| 151 | + key := client.ObjectKey{ |
| 152 | + Namespace: machine.Namespace, |
| 153 | + Name: machine.Labels[v1alpha1.MachineClusterLabelName], |
| 154 | + } |
| 155 | + |
| 156 | + if err := r.Client.Get(ctx, key, cluster); err != nil { |
| 157 | + return nil, err |
| 158 | + } |
| 159 | + |
| 160 | + return cluster, nil |
| 161 | +} |
| 162 | + |
| 163 | +func (r *ReconcileNodeRef) getNodeReference(client corev1.NodesGetter, providerID *noderefutil.ProviderID) (*apicorev1.ObjectReference, error) { |
| 164 | + listOpt := metav1.ListOptions{} |
| 165 | + |
| 166 | + for { |
| 167 | + nodeList, err := client.Nodes().List(listOpt) |
| 168 | + if err != nil { |
| 169 | + return nil, err |
| 170 | + } |
| 171 | + |
| 172 | + for _, node := range nodeList.Items { |
| 173 | + nodeProviderID, err := noderefutil.NewProviderID(node.Spec.ProviderID) |
| 174 | + if err != nil { |
| 175 | + continue |
| 176 | + } |
| 177 | + |
| 178 | + if providerID.Equals(nodeProviderID) { |
| 179 | + return &apicorev1.ObjectReference{ |
| 180 | + Kind: node.Kind, |
| 181 | + APIVersion: node.APIVersion, |
| 182 | + Name: node.Name, |
| 183 | + UID: node.UID, |
| 184 | + }, nil |
| 185 | + } |
| 186 | + } |
| 187 | + |
| 188 | + listOpt.Continue = nodeList.Continue |
| 189 | + if listOpt.Continue == "" { |
| 190 | + break |
| 191 | + } |
| 192 | + } |
| 193 | + |
| 194 | + return nil, ErrNodeNotFound |
| 195 | +} |
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