func()

in pkg/controllers/member/internalmembercluster/v1beta1/controller_v1beta1.go [51:105]

• 44 lines of code
• 10 McCabe index (conditional complexity)

func (r *Reconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
	imcKRef := klog.KRef(req.Namespace, req.Name)
	startTime := time.Now()
	klog.V(2).InfoS("Reconciliation starts", "internalMemberCluster", imcKRef)
	defer func() {
		latency := time.Since(startTime).Milliseconds()
		klog.V(2).InfoS("Reconciliation ends", "internalMemberCluster", imcKRef, "latency", latency)
	}()

	var imc clusterv1beta1.InternalMemberCluster
	if err := r.HubClient.Get(ctx, req.NamespacedName, &imc); err != nil {
		if apierrors.IsNotFound(err) {
			klog.V(4).InfoS("internal member cluster object is not found", "internalMemberCluster", imcKRef)
			return ctrl.Result{}, nil
		}
		klog.ErrorS(err, "Failed to get internal member cluster object", "internalMemberCluster", imcKRef)
		return ctrl.Result{}, err
	}

	switch imc.Spec.State {
	case clusterv1beta1.ClusterStateLeave:
		// The member cluster is leaving the fleet.
		klog.V(2).InfoS("member cluster has left the fleet; performing cleanup", "internalMemberCluster", imcKRef)

		// Clean up fleet networking related resources.
		if r.AgentType == clusterv1beta1.MultiClusterServiceAgent {
			if err := r.cleanupMCSRelatedResources(ctx); err != nil {
				return ctrl.Result{}, err
			}
		}
		if r.AgentType == clusterv1beta1.ServiceExportImportAgent {
			if err := r.cleanupServiceExportRelatedResources(ctx); err != nil {
				return ctrl.Result{}, err
			}
		}

		// Update the agent status.
		return ctrl.Result{}, r.updateAgentStatus(ctx, &imc)
	case clusterv1beta1.ClusterStateJoin:
		// The member cluster still has an active membership in the fleet; update the agent status.
		if err := r.updateAgentStatus(ctx, &imc); err != nil {
			return ctrl.Result{}, err
		}

		// Add jitter to the heartbeat report interval, so as to mitigate the thundering herd problem.
		hbInterval := 1000 * imc.Spec.HeartbeatPeriodSeconds
		jitterRange := int64(hbInterval*jitterPercent) / 100
		requeueAfter := time.Millisecond * (time.Duration(hbInterval) + time.Duration(rand.Int63nRange(0, jitterRange)-jitterRange/2))
		return ctrl.Result{RequeueAfter: requeueAfter}, nil
	default:
		klog.ErrorS(fmt.Errorf("cluster is of an invalid state"), "internalMemberCluster", imcKRef, "clusterState", imc.Spec.State)
	}

	return ctrl.Result{}, nil
}