github.com/1aal/kubeblocks@v0.0.0-20231107070852-e1c03e598921/controllers/apps/transformer_assure_meta.go (about)

     1  /*
     2  Copyright (C) 2022-2023 ApeCloud Co., Ltd
     3  
     4  This file is part of KubeBlocks project
     5  
     6  This program is free software: you can redistribute it and/or modify
     7  it under the terms of the GNU Affero General Public License as published by
     8  the Free Software Foundation, either version 3 of the License, or
     9  (at your option) any later version.
    10  
    11  This program is distributed in the hope that it will be useful
    12  but WITHOUT ANY WARRANTY; without even the implied warranty of
    13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    14  GNU Affero General Public License for more details.
    15  
    16  You should have received a copy of the GNU Affero General Public License
    17  along with this program.  If not, see <http://www.gnu.org/licenses/>.
    18  */
    19  
    20  package apps
    21  
    22  import (
    23  	"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
    24  
    25  	"github.com/1aal/kubeblocks/pkg/constant"
    26  	"github.com/1aal/kubeblocks/pkg/controller/graph"
    27  )
    28  
    29  type AssureMetaTransformer struct{}
    30  
    31  var _ graph.Transformer = &AssureMetaTransformer{}
    32  
    33  func (t *AssureMetaTransformer) Transform(ctx graph.TransformContext, dag *graph.DAG) error {
    34  	transCtx, _ := ctx.(*clusterTransformContext)
    35  	cluster := transCtx.Cluster
    36  
    37  	// The object is not being deleted, so if it does not have our finalizer,
    38  	// then lets add the finalizer and update the object. This is equivalent
    39  	// registering our finalizer.
    40  	if !controllerutil.ContainsFinalizer(cluster, constant.DBClusterFinalizerName) {
    41  		controllerutil.AddFinalizer(cluster, constant.DBClusterFinalizerName)
    42  	}
    43  
    44  	// patch the label to prevent the label from being modified by the user.
    45  	labels := cluster.Labels
    46  	if labels == nil {
    47  		labels = map[string]string{}
    48  	}
    49  	cdLabelName := labels[constant.ClusterDefLabelKey]
    50  	cvLabelName := labels[constant.ClusterVerLabelKey]
    51  	cdName, cvName := cluster.Spec.ClusterDefRef, cluster.Spec.ClusterVersionRef
    52  	if cdLabelName == cdName && cvLabelName == cvName {
    53  		return nil
    54  	}
    55  	labels[constant.ClusterDefLabelKey] = cdName
    56  	labels[constant.ClusterVerLabelKey] = cvName
    57  	cluster.Labels = labels
    58  
    59  	return nil
    60  }