set pod as the ownerRef for the csiaddons

The pod might move to new nodes and this
might create the stale CSIAddonsNode object.
so, we need to set the pod as the owner
for the deployment as we dont store any details
that are required later on for any other
operations like Fencing etc.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

Author: Madhu-1

sidecar/internal/csiaddonsnode/csiaddonsnode.go

@@ -30,6 +30,7 @@ import (
 
 	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/apimachinery/pkg/util/wait"
 	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/rest"
@@ -138,6 +139,8 @@ func (mgr *Manager) newCSIAddonsNode(node *csiaddonsv1alpha1.CSIAddonsNode) erro
 			csiaddonNode.ResourceVersion = resourceVersion
 		}
 		node.Spec.DeepCopyInto(&csiaddonNode.Spec)
+		// set the ownerReferences
+		csiaddonNode.ObjectMeta.OwnerReferences = node.ObjectMeta.OwnerReferences
 		return nil
 	})
 
@@ -188,7 +191,10 @@ func (mgr *Manager) getCSIAddonsNode() (*csiaddonsv1alpha1.CSIAddonsNode, error)
 		return nil, fmt.Errorf("%w: pod has no owner", errInvalidConfig)
 	}
 
-	ownerReferences := []v1.OwnerReference{}
+	ownerKindForCSIAddonsName := ""
+	ownerNameForCSIAddonsName := ""
+
+	ownerReferences := make([]v1.OwnerReference, 1)
 	if pod.OwnerReferences[0].Kind == "ReplicaSet" {
 		// If the pod is owned by a ReplicaSet, we need to get the owner of the ReplicaSet i.e. Deployment
 		rs, err := mgr.KubeClient.AppsV1().ReplicaSets(mgr.PodNamespace).Get(context.TODO(), pod.OwnerReferences[0].Name, v1.GetOptions{})
@@ -198,14 +204,29 @@ func (mgr *Manager) getCSIAddonsNode() (*csiaddonsv1alpha1.CSIAddonsNode, error)
 		if len(rs.OwnerReferences) == 0 {
 			return nil, fmt.Errorf("%w: replicaset has no owner", errInvalidConfig)
 		}
-		ownerReferences = append(ownerReferences, rs.OwnerReferences[0])
+		ownerKindForCSIAddonsName = rs.OwnerReferences[0].Kind
+		ownerNameForCSIAddonsName = rs.OwnerReferences[0].Name
+
+		// The pod (created using deployment) might move to new nodes and this might create the
+		// stale CSIAddonsNode object.
+		// So, we need to set the pod as the owner for the CSIAddonsNode as we dont store any details
+		// that are required later on for any other operations like Fencing etc.
+		ownerReferences[0] = v1.OwnerReference{
+			APIVersion: "v1",
+			Kind:       "Pod",
+			Name:       pod.Name,
+			UID:        types.UID(mgr.PodUID),
+		}
 	} else {
+		ownerKindForCSIAddonsName = pod.OwnerReferences[0].Kind
+		ownerNameForCSIAddonsName = pod.OwnerReferences[0].Name
 		// If the pod is owned by DeamonSet or StatefulSet get the owner of the pod.
-		ownerReferences = append(ownerReferences, pod.OwnerReferences[0])
+		ownerReferences[0] = pod.OwnerReferences[0]
 	}
+
 	// we need to have the constant name for the CSIAddonsNode object.
 	// We will use the nodeID and the ownerName for the CSIAddonsNode object name.
-	name, err := generateName(mgr.Node, mgr.PodNamespace, ownerReferences[0].Kind, ownerReferences[0].Name)
+	name, err := generateName(mgr.Node, mgr.PodNamespace, ownerKindForCSIAddonsName, ownerNameForCSIAddonsName)
 	if err != nil {
 		return nil, fmt.Errorf("failed to generate name: %w", err)
 	}