9 "github.com/go-logr/logr"
10 "github.com/operator-framework/operator-sdk/pkg/predicate"
12 onapv1alpha1 "collectd-operator/pkg/apis/onap/v1alpha1"
13 collectdutils "collectd-operator/pkg/controller/utils"
15 appsv1 "k8s.io/api/apps/v1"
16 corev1 "k8s.io/api/core/v1"
17 "k8s.io/apimachinery/pkg/api/errors"
18 "k8s.io/apimachinery/pkg/runtime"
19 "k8s.io/client-go/util/retry"
20 "sigs.k8s.io/controller-runtime/pkg/client"
21 "sigs.k8s.io/controller-runtime/pkg/controller"
22 "sigs.k8s.io/controller-runtime/pkg/handler"
23 "sigs.k8s.io/controller-runtime/pkg/manager"
24 "sigs.k8s.io/controller-runtime/pkg/reconcile"
25 logf "sigs.k8s.io/controller-runtime/pkg/runtime/log"
26 "sigs.k8s.io/controller-runtime/pkg/source"
29 var log = logf.Log.WithName("controller_collectdplugin")
31 // Add creates a new CollectdPlugin Controller and adds it to the Manager. The Manager will set fields on the Controller
32 // and Start it when the Manager is Started.
33 func Add(mgr manager.Manager) error {
34 return add(mgr, newReconciler(mgr))
37 // newReconciler returns a new reconcile.Reconciler
38 func newReconciler(mgr manager.Manager) reconcile.Reconciler {
39 return &ReconcileCollectdPlugin{client: mgr.GetClient(), scheme: mgr.GetScheme()}
42 // add adds a new Controller to mgr with r as the reconcile.Reconciler
43 func add(mgr manager.Manager, r reconcile.Reconciler) error {
44 // Create a new controller
45 log.V(1).Info("Creating a new controller for CollectdPlugin")
46 c, err := controller.New("collectdplugin-controller", mgr, controller.Options{Reconciler: r})
51 // Watch for changes to primary resource CollectdPlugin
52 log.V(1).Info("Add watcher for primary resource CollectdPlugin")
53 err = c.Watch(&source.Kind{Type: &onapv1alpha1.CollectdPlugin{}}, &handler.EnqueueRequestForObject{}, predicate.GenerationChangedPredicate{})
58 log.V(1).Info("Add watcher for secondary resource Collectd Daemonset")
60 &source.Kind{Type: &appsv1.DaemonSet{}},
61 &handler.EnqueueRequestsFromMapFunc{
62 ToRequests: handler.ToRequestsFunc(func(a handler.MapObject) []reconcile.Request {
63 labelSelector, err := collectdutils.GetWatchLabels()
64 labels := strings.Split(labelSelector, "=")
66 log.Error(err, "Failed to get watch labels, continuing with default label")
68 rcp := r.(*ReconcileCollectdPlugin)
69 // Select the Daemonset with labelSelector (Defautl is app=collectd)
70 if a.Meta.GetLabels()[labels[0]] == labels[1] {
71 var requests []reconcile.Request
72 cpList, err := collectdutils.GetCollectdPluginList(rcp.client, a.Meta.GetNamespace())
76 for _, cp := range cpList.Items {
77 requests = append(requests, reconcile.Request{
78 NamespacedName: client.ObjectKey{Namespace: cp.Namespace, Name: cp.Name}})
92 // blank assignment to verify that ReconcileCollectdPlugin implements reconcile.Reconciler
93 var _ reconcile.Reconciler = &ReconcileCollectdPlugin{}
95 // ReconcileCollectdPlugin reconciles a CollectdPlugin object
96 type ReconcileCollectdPlugin struct {
97 // This client, initialized using mgr.Client() above, is a split client
98 // that reads objects from the cache and writes to the apiserver
100 scheme *runtime.Scheme
103 // Reconcile reads that state of the cluster for a CollectdPlugin object and makes changes based on the state read
104 // and what is in the CollectdPlugin.Spec
105 // TODO(user): Modify this Reconcile function to implement your Controller logic. This example creates
106 // a Pod as an example
108 // The Controller will requeue the Request to be processed again if the returned error is non-nil or
109 // Result.Requeue is true, otherwise upon completion it will remove the work from the queue.
110 func (r *ReconcileCollectdPlugin) Reconcile(request reconcile.Request) (reconcile.Result, error) {
111 reqLogger := log.WithValues("Request.Namespace", request.Namespace, "Request.Name", request.Name)
112 reqLogger.Info("Reconciling CollectdPlugin")
114 // Fetch the CollectdPlugin instance
115 instance := &onapv1alpha1.CollectdPlugin{}
116 err := r.client.Get(context.TODO(), request.NamespacedName, instance)
118 if errors.IsNotFound(err) {
119 // Request object not found, could have been deleted after reconcile request.
120 // Owned objects are automatically garbage collected. For additional cleanup logic use finalizers.
121 // Return and don't requeue
122 reqLogger.V(1).Info("CollectdPlugin object Not found")
123 return reconcile.Result{}, nil
125 // Error reading the object - requeue the request.
126 reqLogger.V(1).Info("Error reading the CollectdPlugin object, Requeuing")
127 return reconcile.Result{}, err
130 // Handle Delete CR for additional cleanup
131 isDelete, err := r.handleDelete(reqLogger, instance)
133 return reconcile.Result{}, err
136 // Add finalizer for this CR
137 if !collectdutils.Contains(instance.GetFinalizers(), collectdutils.CollectdFinalizer) {
138 if err := r.addFinalizer(reqLogger, instance); err != nil {
139 return reconcile.Result{}, err
141 return reconcile.Result{}, nil
143 // Handle the reconciliation for CollectdPlugin.
144 // At this stage the Status of the CollectdPlugin should NOT be ""
145 err = r.handleCollectdPlugin(reqLogger, instance, false)
146 return reconcile.Result{}, err
149 // handleCollectdPlugin regenerates the collectd conf on CR Create, Update, Delete events
150 func (r *ReconcileCollectdPlugin) handleCollectdPlugin(reqLogger logr.Logger, cr *onapv1alpha1.CollectdPlugin, isDelete bool) error {
152 rmap, err := collectdutils.FindResourceMapForCR(r.client, reqLogger, cr.Namespace)
154 reqLogger.Error(err, "Skip reconcile: Resources not found")
159 reqLogger.V(1).Info("Found ResourceMap")
160 reqLogger.V(1).Info(":::: ConfigMap Info ::::", "ConfigMap.Namespace", cm.Namespace, "ConfigMap.Name", cm.Name)
162 collectdConf, err := collectdutils.RebuildCollectdConf(r.client, cr.Namespace, isDelete, cr.Spec.PluginName)
164 reqLogger.Error(err, "Skip reconcile: Rebuild conf failed")
168 cm.SetAnnotations(map[string]string{
169 "daaas-random": collectdutils.ComputeSHA256([]byte(collectdConf)),
172 cm.Data["collectd.conf"] = collectdConf
174 // Update the ConfigMap with new Spec and reload DaemonSets
175 reqLogger.Info("Updating the ConfigMap", "ConfigMap.Namespace", cm.Namespace, "ConfigMap.Name", cm.Name)
176 log.V(1).Info("ConfigMap Data", "Map: ", cm.Data)
177 err = r.client.Update(context.TODO(), cm)
179 reqLogger.Error(err, "Update the ConfigMap failed", "ConfigMap.Namespace", cm.Namespace, "ConfigMap.Name", cm.Name)
183 retryErr := retry.RetryOnConflict(retry.DefaultRetry, func() error {
184 // Retrieve the latest version of Daemonset before attempting update
185 // RetryOnConflict uses exponential backoff to avoid exhausting the apiserver
186 // Select DaemonSets with label
187 dsList := &appsv1.DaemonSetList{}
188 opts := &client.ListOptions{}
189 labelSelector, err := collectdutils.GetWatchLabels()
191 reqLogger.Error(err, "Failed to get watch labels, continuing with default label")
193 opts.SetLabelSelector(labelSelector)
194 opts.InNamespace(cr.Namespace)
195 err = r.client.List(context.TODO(), opts, dsList)
197 panic(fmt.Errorf("Failed to get latest version of DaemonSet: %v", err))
200 if dsList.Items == nil || len(dsList.Items) == 0 {
201 return errors.NewNotFound(corev1.Resource("daemonset"), "DaemonSet")
203 ds := &dsList.Items[0]
204 //Restart Collectd Pods
205 reqLogger.Info("Reloading the Daemonset", "DaemonSet.Namespace", ds.Namespace, "DaemonSet.Name", ds.Name)
206 //Restart only if hash of conf has changed.
207 ds.Spec.Template.SetAnnotations(map[string]string{
208 "daaas-random": collectdutils.ComputeSHA256([]byte(collectdConf)),
210 updateErr := r.client.Update(context.TODO(), ds)
214 panic(fmt.Errorf("Update failed: %v", retryErr))
217 err = r.updateStatus(cr)
219 reqLogger.Error(err, "Unable to update status")
223 reqLogger.Info("Reconcile success!!")
227 // Handle Delete CR event for additional cleanup
228 func (r *ReconcileCollectdPlugin) handleDelete(reqLogger logr.Logger, cr *onapv1alpha1.CollectdPlugin) (bool, error) {
229 // Check if the CollectdPlugin instance is marked to be deleted, which is
230 // indicated by the deletion timestamp being set.
231 isMarkedToBeDeleted := cr.GetDeletionTimestamp() != nil
232 if isMarkedToBeDeleted {
233 // Update status to Deleting state
234 cr.Status.Status = onapv1alpha1.Deleting
235 cr.Status.CollectdAgents = nil
236 _ = r.client.Status().Update(context.TODO(), cr)
238 if collectdutils.Contains(cr.GetFinalizers(), collectdutils.CollectdFinalizer) {
239 // Run finalization logic for collectdPluginFinalizer. If the
240 // finalization logic fails, don't remove the finalizer so
241 // that we can retry during the next reconciliation.
242 if err := r.finalizeCollectdPlugin(reqLogger, cr); err != nil {
243 return isMarkedToBeDeleted, err
246 // Remove collectdPluginFinalizer. Once all finalizers have been
247 // removed, the object will be deleted.
248 cr.SetFinalizers(collectdutils.Remove(cr.GetFinalizers(), collectdutils.CollectdFinalizer))
249 err := r.client.Update(context.TODO(), cr)
251 return isMarkedToBeDeleted, err
255 return isMarkedToBeDeleted, nil
258 func (r *ReconcileCollectdPlugin) updateStatus(cr *onapv1alpha1.CollectdPlugin) error {
259 switch cr.Status.Status {
260 case onapv1alpha1.Initial:
261 cr.Status.Status = onapv1alpha1.Created
262 case onapv1alpha1.Created, onapv1alpha1.Enabled:
263 pods, err := collectdutils.GetPodList(r.client, cr.Namespace)
267 if !reflect.DeepEqual(pods, cr.Status.CollectdAgents) {
268 cr.Status.CollectdAgents = pods
269 cr.Status.Status = onapv1alpha1.Enabled
271 case onapv1alpha1.Deleting, onapv1alpha1.Deprecated:
274 err := r.client.Status().Update(context.TODO(), cr)
278 func (r *ReconcileCollectdPlugin) finalizeCollectdPlugin(reqLogger logr.Logger, cr *onapv1alpha1.CollectdPlugin) error {
279 // Cleanup by regenerating new collectd conf and rolling update of DaemonSet
280 if err := r.handleCollectdPlugin(reqLogger, cr, true); err != nil {
281 reqLogger.Error(err, "Finalize CollectdPlugin failed!!")
284 reqLogger.Info("Successfully finalized CollectdPlugin!!")
288 func (r *ReconcileCollectdPlugin) addFinalizer(reqLogger logr.Logger, cr *onapv1alpha1.CollectdPlugin) error {
289 reqLogger.Info("Adding Finalizer for the CollectdPlugin")
290 cr.SetFinalizers(append(cr.GetFinalizers(), collectdutils.CollectdFinalizer))
291 // Update status from Initial to Created
292 // Since addFinalizer will be executed only once,
293 // the status will be changed from Initial state to Created
294 updateErr := r.updateStatus(cr)
295 if updateErr != nil {
296 reqLogger.Error(updateErr, "Failed to update status from Initial state")
299 err := r.client.Update(context.TODO(), cr)
301 reqLogger.Error(err, "Failed to update CollectdPlugin with finalizer")