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package collectdplugin
import (
"context"
"crypto/sha256"
onapv1alpha1 "demo/vnfs/DAaaS/microservices/collectd-operator/pkg/apis/onap/v1alpha1"
corev1 "k8s.io/api/core/v1"
extensionsv1beta1 "k8s.io/api/extensions/v1beta1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
logf "sigs.k8s.io/controller-runtime/pkg/runtime/log"
"sigs.k8s.io/controller-runtime/pkg/source"
)
var log = logf.Log.WithName("controller_collectdplugin")
// ResourceMap to hold objects to update/reload
type ResourceMap struct {
configMap *corev1.ConfigMap
daemonSet *extensionsv1beta1.DaemonSet
}
/**
* USER ACTION REQUIRED: This is a scaffold file intended for the user to modify with their own Controller
* business logic. Delete these comments after modifying this file.*
*/
// Add creates a new CollectdPlugin Controller and adds it to the Manager. The Manager will set fields on the Controller
// and Start it when the Manager is Started.
func Add(mgr manager.Manager) error {
return add(mgr, newReconciler(mgr))
}
// newReconciler returns a new reconcile.Reconciler
func newReconciler(mgr manager.Manager) reconcile.Reconciler {
return &ReconcileCollectdPlugin{client: mgr.GetClient(), scheme: mgr.GetScheme()}
}
// add adds a new Controller to mgr with r as the reconcile.Reconciler
func add(mgr manager.Manager, r reconcile.Reconciler) error {
// Create a new controller
log.V(1).Info("Creating a new controller for CollectdPlugin")
c, err := controller.New("collectdplugin-controller", mgr, controller.Options{Reconciler: r})
if err != nil {
return err
}
// Watch for changes to primary resource CollectdPlugin
log.V(1).Info("Add watcher for primary resource CollectdPlugin")
err = c.Watch(&source.Kind{Type: &onapv1alpha1.CollectdPlugin{}}, &handler.EnqueueRequestForObject{})
if err != nil {
return err
}
// TODO(user): Modify this to be the types you create that are owned by the primary resource
// Watch for changes to secondary resource Pods and requeue the owner CollectdPlugin
log.V(1).Info("Add watcher for secondary resource ConfigMap")
err = c.Watch(&source.Kind{Type: &corev1.ConfigMap{}}, &handler.EnqueueRequestForOwner{
IsController: true,
OwnerType: &onapv1alpha1.CollectdPlugin{},
})
if err != nil {
return err
}
err = c.Watch(&source.Kind{Type: &extensionsv1beta1.DaemonSet{}}, &handler.EnqueueRequestForOwner{
IsController: true,
OwnerType: &onapv1alpha1.CollectdPlugin{},
})
if err != nil {
return err
}
return nil
}
// blank assignment to verify that ReconcileCollectdPlugin implements reconcile.Reconciler
var _ reconcile.Reconciler = &ReconcileCollectdPlugin{}
// ReconcileCollectdPlugin reconciles a CollectdPlugin object
type ReconcileCollectdPlugin struct {
// This client, initialized using mgr.Client() above, is a split client
// that reads objects from the cache and writes to the apiserver
client client.Client
scheme *runtime.Scheme
}
// 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
// TODO(user): Modify this Reconcile function to implement your Controller logic. This example creates
// a Pod as an example
// Note:
// The Controller will requeue the Request to be processed again if the returned error is non-nil or
// Result.Requeue is true, otherwise upon completion it will remove the work from the queue.
func (r *ReconcileCollectdPlugin) Reconcile(request reconcile.Request) (reconcile.Result, error) {
reqLogger := log.WithValues("Request.Namespace", request.Namespace, "Request.Name", request.Name)
reqLogger.Info("Reconciling CollectdPlugin")
// Fetch the CollectdPlugin instance
instance := &onapv1alpha1.CollectdPlugin{}
err := r.client.Get(context.TODO(), request.NamespacedName, instance)
if err != nil {
if errors.IsNotFound(err) {
// Request object not found, could have been deleted after reconcile request.
// Owned objects are automatically garbage collected. For additional cleanup logic use finalizers.
// Return and don't requeue
reqLogger.V(1).Info("CollectdPlugin object Not found")
return reconcile.Result{}, nil
}
// Error reading the object - requeue the request.
reqLogger.V(1).Info("Error reading the CollectdPlugin object, Requeuing")
return reconcile.Result{}, err
}
rmap, err := findResourceMapForCR(r, instance)
if err != nil {
reqLogger.Info("Skip reconcile: ConfigMap not found")
return reconcile.Result{}, err
}
cm := rmap.configMap
ds := rmap.daemonSet
reqLogger.V(1).Info("Found ResourceMap")
reqLogger.V(1).Info("ConfigMap.Namespace", cm.Namespace, "ConfigMap.Name", cm.Name)
reqLogger.V(1).Info("DaemonSet.Namespace", ds.Namespace, "DaemonSet.Name", ds.Name)
// Set CollectdPlugin instance as the owner and controller
if err := controllerutil.SetControllerReference(instance, cm, r.scheme); err != nil {
return reconcile.Result{}, err
}
// Set CollectdConf instance as the owner and controller
if err := controllerutil.SetControllerReference(instance, ds, r.scheme); err != nil {
return reconcile.Result{}, err
}
// Update the ConfigMap with new Spec and reload DaemonSets
reqLogger.Info("Updating the ConfigMap", "ConfigMap.Namespace", cm.Namespace, "ConfigMap.Name", cm.Name)
log.Info("Map: ", cm.Data)
err = r.client.Update(context.TODO(), cm)
if err != nil {
return reconcile.Result{}, err
}
//Restart Collectd Pods
ds.Spec.Template.SetLabels(map[string]string{
"daaas-random": ComputeSHA256([]byte("TEST")),
})
// Reconcile success
reqLogger.Info("Updated the ConfigMap", "ConfigMap.Namespace", cm.Namespace, "ConfigMap.Name", cm.Name)
return reconcile.Result{}, nil
}
// ComputeSHA256 returns hash of data as string
func ComputeSHA256(data []byte) string {
hash := sha256.Sum256(data)
return string(hash[:])
}
// findConfigMapForCR returns the configMap used by collectd Daemonset
func findResourceMapForCR(r *ReconcileCollectdPlugin, cr *onapv1alpha1.CollectdPlugin) (ResourceMap, error) {
cmList := &corev1.ConfigMapList{}
opts := &client.ListOptions{}
rmap := ResourceMap{}
// Select ConfigMaps with label app=collectd
opts.SetLabelSelector("app=collectd")
opts.InNamespace(cr.Namespace)
err := r.client.List(context.TODO(), opts, cmList)
if err != nil {
return rmap, err
}
// Select DaemonSets with label app=collectd
dsList := &extensionsv1beta1.DaemonSet{}
err = r.client.List(context.TODO(), opts, dsList)
if err != nil {
return rmap, err
}
rmap.configMap = &cmList.Items[0]
rmap.daemonSet = dsList
return rmap, err
}
// newPodForCR returns a busybox pod with the same name/namespace as the cr
func newPodForCR(cr *onapv1alpha1.CollectdPlugin) *corev1.Pod {
labels := map[string]string{
"app": cr.Name,
}
return &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: cr.Name + "-pod",
Namespace: cr.Namespace,
Labels: labels,
},
Spec: corev1.PodSpec{
Containers: []corev1.Container{
{
Name: "busybox",
Image: "busybox",
Command: []string{"sleep", "3600"},
},
},
},
}
}
|
