From 926c1dfa17a730ab72e7f3f2c8249f02993cce83 Mon Sep 17 00:00:00 2001
From: Gerrit <Gerrit91@users.noreply.github.com>
Date: Fri, 24 Sep 2021 09:29:09 +0200
Subject: [PATCH] Remove finalizer from deletion flow to fix Gardener shoot
 deletion. (#27)

---
 controllers/duros_controller.go | 37 -------------------
 controllers/resources.go        | 63 ---------------------------------
 2 files changed, 100 deletions(-)

diff --git a/controllers/duros_controller.go b/controllers/duros_controller.go
index 936f3fc..b785dd8 100644
--- a/controllers/duros_controller.go
+++ b/controllers/duros_controller.go
@@ -26,7 +26,6 @@ import (
 	"k8s.io/apimachinery/pkg/types"
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/client"
-	"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
 	"sigs.k8s.io/controller-runtime/pkg/predicate"
 
 	"github.com/metal-stack/duros-go"
@@ -89,33 +88,6 @@ func (r *DurosReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl
 	projectID := duros.Spec.MetalProjectID
 	storageClasses := duros.Spec.StorageClasses
 
-	if duros.ObjectMeta.DeletionTimestamp.IsZero() {
-		if !containsString(duros.GetFinalizers(), DurosFinalizerName) {
-			controllerutil.AddFinalizer(duros, DurosFinalizerName)
-			if err := r.Update(ctx, duros); err != nil {
-				return requeue, err
-			}
-		}
-	} else {
-		// object is being deleted
-		// we don't pass the cancelled context here because then our deletion
-		// procedure will stop prematurely
-		deletionCtx := context.Background()
-
-		if containsString(duros.GetFinalizers(), DurosFinalizerName) {
-			if err := r.cleanupResources(deletionCtx); err != nil {
-				return requeue, err
-			}
-
-			controllerutil.RemoveFinalizer(duros, DurosFinalizerName)
-			if err := r.Update(deletionCtx, duros); err != nil {
-				return requeue, err
-			}
-		}
-
-		return ctrl.Result{}, nil
-	}
-
 	p, err := r.createProjectIfNotExist(ctx, projectID)
 	if err != nil {
 		return requeue, err
@@ -235,12 +207,3 @@ func validateDuros(duros *v1.Duros) error {
 	}
 	return nil
 }
-
-func containsString(slice []string, s string) bool {
-	for _, item := range slice {
-		if item == s {
-			return true
-		}
-	}
-	return false
-}
diff --git a/controllers/resources.go b/controllers/resources.go
index 2b92317..9195624 100644
--- a/controllers/resources.go
+++ b/controllers/resources.go
@@ -13,7 +13,6 @@ import (
 
 	storagev1 "github.com/metal-stack/duros-controller/api/v1"
 	apps "k8s.io/api/apps/v1"
-	appsv1 "k8s.io/api/apps/v1"
 	corev1 "k8s.io/api/core/v1"
 	policy "k8s.io/api/policy/v1beta1"
 	rbac "k8s.io/api/rbac/v1"
@@ -1018,68 +1017,6 @@ type deletionResource struct {
 	Object client.Object
 }
 
-func (r *DurosReconciler) cleanupResources(ctx context.Context) error {
-	log := r.Log.WithName("storage-csi")
-	log.Info("cleanup csi")
-
-	resources := []deletionResource{
-		{
-			Key:    types.NamespacedName{Name: lbCSINodeName, Namespace: namespace},
-			Object: &appsv1.DaemonSet{},
-		},
-		{
-			Key:    types.NamespacedName{Name: lbCSIControllerName, Namespace: namespace},
-			Object: &appsv1.StatefulSet{},
-		},
-		{
-			Key:    types.NamespacedName{Name: storageClassCredentialsRef, Namespace: namespace},
-			Object: &corev1.Secret{},
-		},
-	}
-
-	for i := range clusterRoleBindings {
-		crb := clusterRoleBindings[i]
-		resources = append(resources, deletionResource{
-			Key:    types.NamespacedName{Name: crb.Name, Namespace: crb.Namespace},
-			Object: &rbac.ClusterRoleBinding{},
-		})
-	}
-
-	for i := range clusterRoles {
-		cr := clusterRoles[i]
-		resources = append(resources, deletionResource{
-			Key:    types.NamespacedName{Name: cr.Name, Namespace: cr.Namespace},
-			Object: &rbac.ClusterRole{},
-		})
-	}
-
-	for i := range serviceAccounts {
-		sa := serviceAccounts[i]
-		resources = append(resources, deletionResource{
-			Key:    types.NamespacedName{Name: sa.Name, Namespace: sa.Namespace},
-			Object: &corev1.ServiceAccount{},
-		})
-	}
-
-	for i := range psps {
-		psp := psps[i]
-		resources = append(resources, deletionResource{
-			Key:    types.NamespacedName{Name: psp.Name},
-			Object: &policy.PodSecurityPolicy{},
-		})
-	}
-
-	// we don't clean up the storage classes and CSI driver because there can be volumes that still reference it
-
-	for _, resource := range resources {
-		if err := r.deleteResourceWithWait(ctx, log, resource); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
 func (r *DurosReconciler) deleteResourceWithWait(ctx context.Context, log logr.Logger, resource deletionResource) error {
 	err := r.Shoot.Get(ctx, resource.Key, resource.Object)
 	if err != nil && apierrors.IsNotFound(err) {