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 extensionsv1beta1 "k8s.io/api/extensions/v1beta1"
18 "k8s.io/apimachinery/pkg/api/errors"
19 "k8s.io/apimachinery/pkg/runtime"
20 "k8s.io/client-go/util/retry"
21 "sigs.k8s.io/controller-runtime/pkg/client"
22 "sigs.k8s.io/controller-runtime/pkg/controller"
23 "sigs.k8s.io/controller-runtime/pkg/handler"
24 "sigs.k8s.io/controller-runtime/pkg/manager"
25 "sigs.k8s.io/controller-runtime/pkg/reconcile"
26 logf "sigs.k8s.io/controller-runtime/pkg/runtime/log"
27 "sigs.k8s.io/controller-runtime/pkg/source"
30 var log = logf.Log.WithName("controller_collectdplugin")
33 // Add creates a new CollectdPlugin Controller and adds it to the Manager. The Manager will set fields on the Controller
34 // and Start it when the Manager is Started.
35 func Add(mgr manager.Manager) error {
36 return add(mgr, newReconciler(mgr))
39 // newReconciler returns a new reconcile.Reconciler
40 func newReconciler(mgr manager.Manager) reconcile.Reconciler {
41 return &ReconcileCollectdPlugin{client: mgr.GetClient(), scheme: mgr.GetScheme()}
44 // add adds a new Controller to mgr with r as the reconcile.Reconciler
45 func add(mgr manager.Manager, r reconcile.Reconciler) error {
46 // Create a new controller
47 log.V(1).Info("Creating a new controller for CollectdPlugin")
48 c, err := controller.New("collectdplugin-controller", mgr, controller.Options{Reconciler: r})
53 // Watch for changes to primary resource CollectdPlugin
54 log.V(1).Info("Add watcher for primary resource CollectdPlugin")
55 err = c.Watch(&source.Kind{Type: &onapv1alpha1.CollectdPlugin{}}, &handler.EnqueueRequestForObject{}, predicate.GenerationChangedPredicate{})
60 log.V(1).Info("Add watcher for secondary resource Collectd Daemonset")
62 &source.Kind{Type: &appsv1.DaemonSet{}},
63 &handler.EnqueueRequestsFromMapFunc{
64 ToRequests: handler.ToRequestsFunc(func (a handler.MapObject) []reconcile.Request {
65 labelSelector, err := collectdutils.GetWatchLabels()
66 labels := strings.Split(labelSelector, "=")
68 log.Error(err, "Failed to get watch labels, continuing with default label")
70 rcp := r.(*ReconcileCollectdPlugin)
71 // Select the Daemonset with labelSelector (Defautl is app=collectd)
72 if a.Meta.GetLabels()[labels[0]] == labels[1] {
73 var requests []reconcile.Request
74 cpList, err := collectdutils.GetCollectdPluginList(rcp.client, a.Meta.GetNamespace())
78 for _, cp := range cpList.Items {
79 requests = append(requests, reconcile.Request{
80 NamespacedName: client.ObjectKey{Namespace: cp.Namespace, Name: cp.Name}})
95 // blank assignment to verify that ReconcileCollectdPlugin implements reconcile.Reconciler
96 var _ reconcile.Reconciler = &ReconcileCollectdPlugin{}
98 // ReconcileCollectdPlugin reconciles a CollectdPlugin object
99 type ReconcileCollectdPlugin struct {
100 // This client, initialized using mgr.Client() above, is a split client
101 // that reads objects from the cache and writes to the apiserver
103 scheme *runtime.Scheme
107 // Reconcile reads that state of the cluster for a CollectdPlugin object and makes changes based on the state read
108 // and what is in the CollectdPlugin.Spec
109 // TODO(user): Modify this Reconcile function to implement your Controller logic. This example creates
110 // a Pod as an example
112 // The Controller will requeue the Request to be processed again if the returned error is non-nil or
113 // Result.Requeue is true, otherwise upon completion it will remove the work from the queue.
114 func (r *ReconcileCollectdPlugin) Reconcile(request reconcile.Request) (reconcile.Result, error) {
115 reqLogger := log.WithValues("Request.Namespace", request.Namespace, "Request.Name", request.Name)
116 reqLogger.Info("Reconciling CollectdPlugin")
118 // Fetch the CollectdPlugin instance
119 instance := &onapv1alpha1.CollectdPlugin{}
120 err := r.client.Get(context.TODO(), request.NamespacedName, instance)
122 if errors.IsNotFound(err) {
123 // Request object not found, could have been deleted after reconcile request.
124 // Owned objects are automatically garbage collected. For additional cleanup logic use finalizers.
125 // Return and don't requeue
126 reqLogger.V(1).Info("CollectdPlugin object Not found")
127 return reconcile.Result{}, nil
129 // Error reading the object - requeue the request.
130 reqLogger.V(1).Info("Error reading the CollectdPlugin object, Requeuing")
131 return reconcile.Result{}, err
134 // Handle Delete CR for additional cleanup
135 isDelete, err := r.handleDelete(reqLogger, instance)
137 return reconcile.Result{}, err
140 // Add finalizer for this CR
141 if !collectdutils.Contains(instance.GetFinalizers(), collectdutils.CollectdFinalizer) {
142 if err := r.addFinalizer(reqLogger, instance); err != nil {
143 return reconcile.Result{}, err
145 return reconcile.Result{}, nil
147 // Handle the reconciliation for CollectdPlugin.
148 // At this stage the Status of the CollectdPlugin should NOT be ""
149 err = r.handleCollectdPlugin(reqLogger, instance, false)
150 return reconcile.Result{}, err
153 // handleCollectdPlugin regenerates the collectd conf on CR Create, Update, Delete events
154 func (r *ReconcileCollectdPlugin) handleCollectdPlugin(reqLogger logr.Logger, cr *onapv1alpha1.CollectdPlugin, isDelete bool) error {
156 rmap, err := collectdutils.FindResourceMapForCR(r.client, reqLogger, cr.Namespace)
158 reqLogger.Error(err, "Skip reconcile: Resources not found")
163 reqLogger.V(1).Info("Found ResourceMap")
164 reqLogger.V(1).Info(":::: ConfigMap Info ::::", "ConfigMap.Namespace", cm.Namespace, "ConfigMap.Name", cm.Name)
166 collectdConf, err := collectdutils.RebuildCollectdConf(r.client, cr.Namespace, isDelete, cr.Spec.PluginName)
168 reqLogger.Error(err, "Skip reconcile: Rebuild conf failed")
172 cm.SetAnnotations(map[string]string{
173 "daaas-random": collectdutils.ComputeSHA256([]byte(collectdConf)),
176 cm.Data["collectd.conf"] = collectdConf
178 // Update the ConfigMap with new Spec and reload DaemonSets
179 reqLogger.Info("Updating the ConfigMap", "ConfigMap.Namespace", cm.Namespace, "ConfigMap.Name", cm.Name)
180 log.V(1).Info("ConfigMap Data", "Map: ", cm.Data)
181 err = r.client.Update(context.TODO(), cm)
183 reqLogger.Error(err, "Update the ConfigMap failed", "ConfigMap.Namespace", cm.Namespace, "ConfigMap.Name", cm.Name)
187 retryErr := retry.RetryOnConflict(retry.DefaultRetry, func() error {
188 // Retrieve the latest version of Daemonset before attempting update
189 // RetryOnConflict uses exponential backoff to avoid exhausting the apiserver
190 // Select DaemonSets with label
191 dsList := &extensionsv1beta1.DaemonSetList{}
192 opts := &client.ListOptions{}
193 labelSelector, err := collectdutils.GetWatchLabels()
195 reqLogger.Error(err, "Failed to get watch labels, continuing with default label")
197 opts.SetLabelSelector(labelSelector)
198 opts.InNamespace(cr.Namespace)
199 err = r.client.List(context.TODO(), opts, dsList)
201 panic(fmt.Errorf("Failed to get latest version of DaemonSet: %v", err))
204 if dsList.Items == nil || len(dsList.Items) == 0 {
205 return errors.NewNotFound(corev1.Resource("daemonset"), "DaemonSet")
207 ds := &dsList.Items[0]
208 //Restart Collectd Pods
209 reqLogger.Info("Reloading the Daemonset", "DaemonSet.Namespace", ds.Namespace, "DaemonSet.Name", ds.Name)
210 //Restart only if hash of conf has changed.
211 ds.Spec.Template.SetAnnotations(map[string]string{
212 "daaas-random": collectdutils.ComputeSHA256([]byte(collectdConf)),
214 updateErr := r.client.Update(context.TODO(), ds)
218 panic(fmt.Errorf("Update failed: %v", retryErr))
221 err = r.updateStatus(cr)
223 reqLogger.Error(err, "Unable to update status")
227 reqLogger.Info("Reconcile success!!")
231 // Handle Delete CR event for additional cleanup
232 func (r *ReconcileCollectdPlugin) handleDelete(reqLogger logr.Logger, cr *onapv1alpha1.CollectdPlugin) (bool, error) {
233 // Check if the CollectdPlugin instance is marked to be deleted, which is
234 // indicated by the deletion timestamp being set.
235 isMarkedToBeDeleted := cr.GetDeletionTimestamp() != nil
236 if isMarkedToBeDeleted {
237 // Update status to Deleting state
238 cr.Status.Status = onapv1alpha1.Deleting
239 cr.Status.CollectdAgents = nil
240 _ = r.client.Status().Update(context.TODO(), cr)
242 if collectdutils.Contains(cr.GetFinalizers(), collectdutils.CollectdFinalizer) {
243 // Run finalization logic for collectdPluginFinalizer. If the
244 // finalization logic fails, don't remove the finalizer so
245 // that we can retry during the next reconciliation.
246 if err := r.finalizeCollectdPlugin(reqLogger, cr); err != nil {
247 return isMarkedToBeDeleted, err
250 // Remove collectdPluginFinalizer. Once all finalizers have been
251 // removed, the object will be deleted.
252 cr.SetFinalizers(collectdutils.Remove(cr.GetFinalizers(), collectdutils.CollectdFinalizer))
253 err := r.client.Update(context.TODO(), cr)
255 return isMarkedToBeDeleted, err
259 return isMarkedToBeDeleted, nil
262 func (r *ReconcileCollectdPlugin) updateStatus(cr *onapv1alpha1.CollectdPlugin) error {
263 switch cr.Status.Status {
264 case onapv1alpha1.Initial:
265 cr.Status.Status = onapv1alpha1.Created
266 case onapv1alpha1.Created, onapv1alpha1.Enabled:
267 pods, err := collectdutils.GetPodList(r.client, cr.Namespace)
271 if !reflect.DeepEqual(pods, cr.Status.CollectdAgents) {
272 cr.Status.CollectdAgents = pods
273 cr.Status.Status = onapv1alpha1.Enabled
275 case onapv1alpha1.Deleting, onapv1alpha1.Deprecated:
278 err := r.client.Status().Update(context.TODO(), cr)
282 func (r *ReconcileCollectdPlugin) finalizeCollectdPlugin(reqLogger logr.Logger, cr *onapv1alpha1.CollectdPlugin) error {
283 // Cleanup by regenerating new collectd conf and rolling update of DaemonSet
284 if err := r.handleCollectdPlugin(reqLogger, cr, true); err != nil {
285 reqLogger.Error(err, "Finalize CollectdPlugin failed!!")
288 reqLogger.Info("Successfully finalized CollectdPlugin!!")
292 func (r *ReconcileCollectdPlugin) addFinalizer(reqLogger logr.Logger, cr *onapv1alpha1.CollectdPlugin) error {
293 reqLogger.Info("Adding Finalizer for the CollectdPlugin")
294 cr.SetFinalizers(append(cr.GetFinalizers(), collectdutils.CollectdFinalizer))
295 // Update status from Initial to Created
296 // Since addFinalizer will be executed only once,
297 // the status will be changed from Initial state to Created
298 updateErr := r.updateStatus(cr)
299 if updateErr != nil {
300 reqLogger.Error(updateErr, "Failed to update status from Initial state")
303 err := r.client.Update(context.TODO(), cr)
305 reqLogger.Error(err, "Failed to update CollectdPlugin with finalizer")