"context"
"crypto/sha256"
"fmt"
+ "os"
+ "reflect"
+ "strings"
+
"github.com/go-logr/logr"
onapv1alpha1 "demo/vnfs/DAaaS/microservices/collectd-operator/pkg/apis/onap/v1alpha1"
+ appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
extensionsv1beta1 "k8s.io/api/extensions/v1beta1"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
+ "k8s.io/client-go/util/retry"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/handler"
return err
}
+ log.V(1).Info("Add watcher for secondary resource Collectd Daemonset")
+ err = c.Watch(
+ &source.Kind{Type: &appsv1.DaemonSet{}},
+ &handler.EnqueueRequestsFromMapFunc{
+ ToRequests: handler.ToRequestsFunc(func (a handler.MapObject) []reconcile.Request {
+ labelSelector, err := getWatchLabels()
+ labels := strings.Split(labelSelector, "=")
+ if err != nil {
+ log.Error(err, "Failed to get watch labels, continuing with default label")
+ }
+ rcp := r.(*ReconcileCollectdPlugin)
+ // Select the Daemonset with labelSelector (Defautl is app=collectd)
+ if a.Meta.GetLabels()[labels[0]] == labels[1] {
+ var requests []reconcile.Request
+ cpList, err := rcp.getCollectdPluginList(a.Meta.GetNamespace())
+ if err != nil {
+ return nil
+ }
+ for _, cp := range cpList.Items {
+ requests = append(requests, reconcile.Request{
+ NamespacedName: client.ObjectKey{Namespace: cp.Namespace, Name: cp.Name}})
+ }
+ return requests
+ }
+ return nil
+ }),
+ })
+ if err != nil {
+ return err
+ }
+
return nil
}
+
// blank assignment to verify that ReconcileCollectdPlugin implements reconcile.Reconciler
var _ reconcile.Reconciler = &ReconcileCollectdPlugin{}
}
// Define the collectdPlugin finalizer for handling deletion
-const collectdPluginFinalizer = "finalizer.collectdplugin.onap.org"
+const (
+ defaultWatchLabel = "app=collectd"
+ collectdPluginFinalizer = "finalizer.collectdplugin.onap.org"
+
+ // WatchLabelsEnvVar is the constant for env variable WATCH_LABELS
+ // which is the labels where the watch activity happens.
+ // this value is empty if the operator is running with clusterScope.
+ WatchLabelsEnvVar = "WATCH_LABELS"
+)
// Reconcile reads that state of the cluster for a CollectdPlugin object and makes changes based on the state read
// and what is in the CollectdPlugin.Spec
if err := r.addFinalizer(reqLogger, instance); err != nil {
return reconcile.Result{}, err
}
+ return reconcile.Result{}, nil
}
- err = r.handleCollectdPlugin(reqLogger, instance)
+ // Handle the reconciliation for CollectdPlugin.
+ // At this stage the Status of the CollectdPlugin should NOT be ""
+ err = r.handleCollectdPlugin(reqLogger, instance, false)
return reconcile.Result{}, err
}
// handleCollectdPlugin regenerates the collectd conf on CR Create, Update, Delete events
-func (r *ReconcileCollectdPlugin) handleCollectdPlugin(reqLogger logr.Logger, cr *onapv1alpha1.CollectdPlugin) error {
+func (r *ReconcileCollectdPlugin) handleCollectdPlugin(reqLogger logr.Logger, cr *onapv1alpha1.CollectdPlugin, isDelete bool) error {
- rmap, err := r.findResourceMapForCR(cr)
+ rmap, err := r.findResourceMapForCR(reqLogger, cr)
if err != nil {
reqLogger.Error(err, "Skip reconcile: Resources not found")
return err
}
cm := rmap.configMap
- ds := rmap.daemonSet
collectPlugins := rmap.collectdPlugins
reqLogger.V(1).Info("Found ResourceMap")
reqLogger.V(1).Info(":::: ConfigMap Info ::::", "ConfigMap.Namespace", cm.Namespace, "ConfigMap.Name", cm.Name)
- reqLogger.V(1).Info(":::: DaemonSet Info ::::", "DaemonSet.Namespace", ds.Namespace, "DaemonSet.Name", ds.Name)
- collectdConf, err := rebuildCollectdConf(collectPlugins)
+ collectdConf, err := rebuildCollectdConf(cr, collectPlugins, isDelete)
- //Restart Collectd Pods
- //Restart only if hash of configmap has changed.
- ds.Spec.Template.SetAnnotations(map[string]string{
- "daaas-random": ComputeSHA256([]byte(collectdConf)),
- })
cm.SetAnnotations(map[string]string{
"daaas-random": ComputeSHA256([]byte(collectdConf)),
})
return err
}
- err = r.client.Update(context.TODO(), ds)
+ retryErr := retry.RetryOnConflict(retry.DefaultRetry, func() error {
+ // Retrieve the latest version of Daemonset before attempting update
+ // RetryOnConflict uses exponential backoff to avoid exhausting the apiserver
+ // Select DaemonSets with label
+ dsList := &extensionsv1beta1.DaemonSetList{}
+ opts := &client.ListOptions{}
+ labelSelector, err := getWatchLabels()
+ if err != nil {
+ reqLogger.Error(err, "Failed to get watch labels, continuing with default label")
+ }
+ opts.SetLabelSelector(labelSelector)
+ opts.InNamespace(cr.Namespace)
+ err = r.client.List(context.TODO(), opts, dsList)
+ if err != nil {
+ panic(fmt.Errorf("Failed to get latest version of DaemonSet: %v", err))
+ }
+
+ if dsList.Items == nil || len(dsList.Items) == 0 {
+ return errors.NewNotFound(corev1.Resource("daemonset"), "DaemonSet")
+ }
+ ds := &dsList.Items[0]
+ //Restart Collectd Pods
+ reqLogger.Info("Reloading the Daemonset", "DaemonSet.Namespace", ds.Namespace, "DaemonSet.Name", ds.Name)
+ //Restart only if hash of conf has changed.
+ ds.Spec.Template.SetAnnotations(map[string]string{
+ "daaas-random": ComputeSHA256([]byte(collectdConf)),
+ })
+ updateErr := r.client.Update(context.TODO(), ds)
+ return updateErr
+ })
+ if retryErr != nil {
+ panic(fmt.Errorf("Update failed: %v", retryErr))
+ }
+
+ err = r.updateStatus(cr)
if err != nil {
- reqLogger.Error(err, "Update the DaemonSet failed", "DaemonSet.Namespace", ds.Namespace, "DaemonSet.Name", ds.Name)
+ reqLogger.Error(err, "Unable to update status")
return err
}
- r.updateStatus(cr)
// Reconcile success
reqLogger.Info("Reconcile success!!")
return nil
}
// findResourceMapForCR returns the configMap, collectd Daemonset and list of Collectd Plugins
-func (r *ReconcileCollectdPlugin) findResourceMapForCR(cr *onapv1alpha1.CollectdPlugin) (ResourceMap, error) {
+func (r *ReconcileCollectdPlugin) findResourceMapForCR(reqLogger logr.Logger, cr *onapv1alpha1.CollectdPlugin) (ResourceMap, error) {
cmList := &corev1.ConfigMapList{}
opts := &client.ListOptions{}
rmap := ResourceMap{}
- // Select ConfigMaps with label app=collectd
- opts.SetLabelSelector("app=collectd")
+ // Select ConfigMaps with label
+ labelSelector, err := getWatchLabels()
+ if err != nil {
+ reqLogger.Error(err, "Failed to get watch labels, continuing with default label")
+ }
+ opts.SetLabelSelector(labelSelector)
opts.InNamespace(cr.Namespace)
- err := r.client.List(context.TODO(), opts, cmList)
+
+ err = r.client.List(context.TODO(), opts, cmList)
if err != nil {
return rmap, err
}
if cmList.Items == nil || len(cmList.Items) == 0 {
- return rmap, err
+ return rmap, errors.NewNotFound(corev1.Resource("configmap"), "ConfigMap")
}
- // Select DaemonSets with label app=collectd
+ // Select DaemonSets with label
dsList := &extensionsv1beta1.DaemonSetList{}
err = r.client.List(context.TODO(), opts, dsList)
if err != nil {
}
if dsList.Items == nil || len(dsList.Items) == 0 {
- return rmap, err
+ return rmap, errors.NewNotFound(corev1.Resource("daemonset"), "DaemonSet")
}
// Get all collectd plugins in the current namespace to rebuild conf.
- collectdPlugins := &onapv1alpha1.CollectdPluginList{}
- cpOpts := &client.ListOptions{}
- cpOpts.InNamespace(cr.Namespace)
- err = r.client.List(context.TODO(), cpOpts, collectdPlugins)
+ cpList, err := r.getCollectdPluginList(cr.Namespace)
if err != nil {
return rmap, err
}
rmap.configMap = &cmList.Items[0]
rmap.daemonSet = &dsList.Items[0]
- rmap.collectdPlugins = &collectdPlugins.Items //will be nil if no plugins exist
+ rmap.collectdPlugins = &cpList.Items //will be nil if no plugins exist
return rmap, err
}
// Get all collectd plugins and reconstruct, compute Hash and check for changes
-func rebuildCollectdConf(cpList *[]onapv1alpha1.CollectdPlugin) (string, error) {
+func rebuildCollectdConf(cr *onapv1alpha1.CollectdPlugin, cpList *[]onapv1alpha1.CollectdPlugin, isDelete bool) (string, error) {
var collectdConf string
if *cpList == nil || len(*cpList) == 0 {
return "", errors.NewNotFound(corev1.Resource("collectdplugin"), "CollectdPlugin")
}
}
+ if isDelete {
+ delete(loadPlugin, cr.Spec.PluginName)
+ }
+
log.V(1).Info("::::::: Plugins Map ::::::: ", "PluginMap ", loadPlugin)
for cpName, cpConf := range loadPlugin {
collectdConf += cpConf + "\n"
}
- collectdConf += "\n#Last line (collectd requires ‘\\n’ at the last line)"
+ collectdConf += "#Last line (collectd requires ‘\\n’ at the last line)\n"
return collectdConf, nil
}
// indicated by the deletion timestamp being set.
isMarkedToBeDeleted := cr.GetDeletionTimestamp() != nil
if isMarkedToBeDeleted {
+ // Update status to Deleting state
+ cr.Status.Status = onapv1alpha1.Deleting
+ cr.Status.CollectdAgents = nil
+ _ = r.client.Status().Update(context.TODO(), cr)
+
if contains(cr.GetFinalizers(), collectdPluginFinalizer) {
// Run finalization logic for collectdPluginFinalizer. If the
// finalization logic fails, don't remove the finalizer so
}
func (r *ReconcileCollectdPlugin) updateStatus(cr *onapv1alpha1.CollectdPlugin) error {
- podList := &corev1.PodList{}
- opts := &client.ListOptions{}
- opts.SetLabelSelector("app=collectd")
- var pods []string
- opts.InNamespace(cr.Namespace)
- err := r.client.List(context.TODO(), opts, podList)
- if err != nil {
- return err
- }
-
- if podList.Items == nil || len(podList.Items) == 0 {
- return err
- }
-
- for _, pod := range podList.Items {
- pods = append(pods, pod.Name)
+ switch cr.Status.Status {
+ case onapv1alpha1.Initial:
+ cr.Status.Status = onapv1alpha1.Created
+ case onapv1alpha1.Created, onapv1alpha1.Enabled:
+ pods, err := r.getPodList(cr.Namespace)
+ if err != nil {
+ return err
+ }
+ if !reflect.DeepEqual(pods, cr.Status.CollectdAgents) {
+ cr.Status.CollectdAgents = pods
+ cr.Status.Status = onapv1alpha1.Enabled
+ }
+ case onapv1alpha1.Deleting, onapv1alpha1.Deprecated:
+ return nil
}
- cr.Status.CollectdAgents = pods
- err = r.client.Status().Update(context.TODO(), cr)
+ err := r.client.Status().Update(context.TODO(), cr)
return err
}
func (r *ReconcileCollectdPlugin) finalizeCollectdPlugin(reqLogger logr.Logger, cr *onapv1alpha1.CollectdPlugin) error {
// Cleanup by regenerating new collectd conf and rolling update of DaemonSet
- if err := r.handleCollectdPlugin(reqLogger, cr); err != nil {
+ if err := r.handleCollectdPlugin(reqLogger, cr, true); err != nil {
reqLogger.Error(err, "Finalize CollectdPlugin failed!!")
return err
}
func (r *ReconcileCollectdPlugin) addFinalizer(reqLogger logr.Logger, cr *onapv1alpha1.CollectdPlugin) error {
reqLogger.Info("Adding Finalizer for the CollectdPlugin")
cr.SetFinalizers(append(cr.GetFinalizers(), collectdPluginFinalizer))
-
+ // Update status from Initial to Created
+ // Since addFinalizer will be executed only once,
+ // the status will be changed from Initial state to Created
+ updateErr := r.updateStatus(cr)
+ if updateErr != nil {
+ reqLogger.Error(updateErr, "Failed to update status from Initial state")
+ }
// Update CR
err := r.client.Update(context.TODO(), cr)
if err != nil {
}
return list
}
+
+// getWatchLabels returns the labels the operator should be watching for changes
+func getWatchLabels() (string, error) {
+ labelSelector, found := os.LookupEnv(WatchLabelsEnvVar)
+ if !found {
+ return defaultWatchLabel, fmt.Errorf("%s must be set", WatchLabelsEnvVar)
+ }
+ return labelSelector, nil
+}
+
+func (r *ReconcileCollectdPlugin) getPodList(ns string) ([]string, error) {
+ var pods []string
+ podList := &corev1.PodList{}
+ opts := &client.ListOptions{}
+ // Select ConfigMaps with label
+ labelSelector, _ := getWatchLabels()
+ opts.SetLabelSelector(labelSelector)
+ opts.InNamespace(ns)
+ err := r.client.List(context.TODO(), opts, podList)
+ if err != nil {
+ return nil, err
+ }
+
+ if podList.Items == nil || len(podList.Items) == 0 {
+ return nil, err
+ }
+
+ for _, pod := range podList.Items {
+ pods = append(pods, pod.Name)
+ }
+ return pods, nil
+}
+
+func (r *ReconcileCollectdPlugin) getCollectdPluginList(ns string) (*onapv1alpha1.CollectdPluginList, error) {
+ // Get all collectd plugins in the current namespace to rebuild conf.
+ collectdPlugins := &onapv1alpha1.CollectdPluginList{}
+ cpOpts := &client.ListOptions{}
+ cpOpts.InNamespace(ns)
+ err := r.client.List(context.TODO(), cpOpts, collectdPlugins)
+ if err != nil {
+ return nil, err
+ }
+ return collectdPlugins, nil
+}
Code Review / demo.git / blobdiff