EVEREST-203 Do not run registration for already registered k8s clusters

pkg/install/operators.go

@@ -780,6 +780,16 @@ func (o *Operators) provisionMonitoring() error {
 
 // connectToEverest connects the k8s cluster to Everest.
 func (o *Operators) connectToEverest(ctx context.Context) (*client.KubernetesCluster, error) {
+	clusters, err := o.everestClient.ListKubernetesClusters(ctx)
+	if err != nil {
+		return nil, errors.Join(err, errors.New("could not list kubernetes clusters"))
+	}
+	for _, cluster := range clusters {
+		if cluster.Name == &o.config.Name {
+			// Cluster is already registered. Do nothing
+			return cluster, nil
+		}
+	}
 	if err := o.prepareServiceAccount(); err != nil {
 		return nil, errors.Join(err, errors.New("could not prepare a service account"))
 	}