github.com/1aal/kubeblocks@v0.0.0-20231107070852-e1c03e598921/pkg/controller/rsm/transformer_deletion.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 rsm
    21  
    22  import (
    23  	corev1 "k8s.io/api/core/v1"
    24  
    25  	"github.com/1aal/kubeblocks/pkg/controller/graph"
    26  	"github.com/1aal/kubeblocks/pkg/controller/model"
    27  )
    28  
    29  // ObjectDeletionTransformer handles object and its secondary resources' deletion
    30  type ObjectDeletionTransformer struct{}
    31  
    32  var _ graph.Transformer = &ObjectDeletionTransformer{}
    33  
    34  func (t *ObjectDeletionTransformer) Transform(ctx graph.TransformContext, dag *graph.DAG) error {
    35  	transCtx, _ := ctx.(*rsmTransformContext)
    36  	obj := transCtx.rsm
    37  	if !model.IsObjectDeleting(obj) {
    38  		return nil
    39  	}
    40  
    41  	graphCli, _ := transCtx.Client.(model.GraphClient)
    42  	// list all objects owned by this primary obj in cache, and delete them all
    43  	// there is chance that objects leak occurs because of cache stale
    44  	// ignore the problem currently
    45  	// TODO: GC the leaked objects
    46  	ml := getLabels(obj)
    47  	snapshot, err := model.ReadCacheSnapshot(transCtx, obj, ml, deletionKinds()...)
    48  	if err != nil {
    49  		return err
    50  	}
    51  	for _, object := range snapshot {
    52  		// don't delete cm that not created by rsm
    53  		if cm, ok := object.(*corev1.ConfigMap); ok && cm.Name != getEnvConfigMapName(obj.Name) {
    54  			continue
    55  		}
    56  		graphCli.Delete(dag, object)
    57  	}
    58  	graphCli.Delete(dag, obj)
    59  
    60  	// fast return, that is stopping the plan.Build() stage and jump to plan.Execute() directly
    61  	return graph.ErrPrematureStop
    62  }