sigs.k8s.io/cluster-api-provider-aws@v1.5.5/pkg/cloud/services/gc/cleanup.go (about)

     1  /*
     2  Copyright 2022 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8  	http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package gc
    18  
    19  import (
    20  	"context"
    21  	"fmt"
    22  	"strconv"
    23  	"strings"
    24  
    25  	"github.com/aws/aws-sdk-go/aws"
    26  	"github.com/aws/aws-sdk-go/aws/arn"
    27  	rgapi "github.com/aws/aws-sdk-go/service/resourcegroupstaggingapi"
    28  
    29  	infrav1 "sigs.k8s.io/cluster-api-provider-aws/api/v1beta1"
    30  	expinfrav1 "sigs.k8s.io/cluster-api-provider-aws/exp/api/v1beta1"
    31  	"sigs.k8s.io/cluster-api-provider-aws/pkg/annotations"
    32  )
    33  
    34  const (
    35  	serviceNameTag    = "kubernetes.io/service-name"
    36  	eksClusterNameTag = "aws:eks:cluster-name"
    37  )
    38  
    39  // ReconcileDelete is responsible for determining if the infra cluster needs to be garbage collected. If
    40  // does then it will perform garbage collection. For example, it will delete the ELB/NLBs that where created
    41  // as a result of Services of type load balancer.
    42  func (s *Service) ReconcileDelete(ctx context.Context) error {
    43  	s.scope.Info("reconciling deletion for garbage collection")
    44  
    45  	val, found := annotations.Get(s.scope.InfraCluster(), expinfrav1.ExternalResourceGCAnnotation)
    46  	if !found {
    47  		val = "true"
    48  	}
    49  
    50  	shouldGC, err := strconv.ParseBool(val)
    51  	if err != nil {
    52  		return fmt.Errorf("converting value %s of annotation %s to bool: %w", val, expinfrav1.ExternalResourceGCAnnotation, err)
    53  	}
    54  
    55  	if !shouldGC {
    56  		s.scope.Info("cluster opted-out of garbage collection")
    57  
    58  		return nil
    59  	}
    60  
    61  	return s.deleteResources(ctx)
    62  }
    63  
    64  func (s *Service) deleteResources(ctx context.Context) error {
    65  	s.scope.Info("deleting aws resources created by tenant cluster")
    66  
    67  	serviceTag := infrav1.ClusterAWSCloudProviderTagKey(s.scope.KubernetesClusterName())
    68  	awsInput := rgapi.GetResourcesInput{
    69  		ResourceTypeFilters: nil,
    70  		TagFilters: []*rgapi.TagFilter{
    71  			{
    72  				Key:    aws.String(serviceTag),
    73  				Values: []*string{aws.String(string(infrav1.ResourceLifecycleOwned))},
    74  			},
    75  		},
    76  	}
    77  
    78  	awsOutput, err := s.resourceTaggingClient.GetResourcesWithContext(ctx, &awsInput)
    79  	if err != nil {
    80  		return fmt.Errorf("getting tagged resources: %w", err)
    81  	}
    82  
    83  	resources := []*AWSResource{}
    84  
    85  	for i := range awsOutput.ResourceTagMappingList {
    86  		mapping := awsOutput.ResourceTagMappingList[i]
    87  		parsedArn, err := arn.Parse(*mapping.ResourceARN)
    88  		if err != nil {
    89  			return fmt.Errorf("parsing resource arn %s: %w", *mapping.ResourceARN, err)
    90  		}
    91  
    92  		tags := map[string]string{}
    93  		for _, rgTag := range mapping.Tags {
    94  			tags[*rgTag.Key] = *rgTag.Value
    95  		}
    96  
    97  		resources = append(resources, &AWSResource{
    98  			ARN:  &parsedArn,
    99  			Tags: tags,
   100  		})
   101  	}
   102  
   103  	if deleteErr := s.cleanupFuncs.Execute(ctx, resources); deleteErr != nil {
   104  		return fmt.Errorf("deleting resources: %w", deleteErr)
   105  	}
   106  
   107  	return nil
   108  }
   109  
   110  func (s *Service) isMatchingResource(resource *AWSResource, serviceName, resourceName string) bool {
   111  	if resource.ARN.Service != serviceName {
   112  		s.scope.V(5).Info("Resource not for service", "arn", resource.ARN.String(), "service_name", serviceName, "resource_name", resourceName)
   113  		return false
   114  	}
   115  	if !strings.HasPrefix(resource.ARN.Resource, resourceName+"/") {
   116  		s.scope.V(5).Info("Resource type does not match", "arn", resource.ARN.String(), "service_name", serviceName, "resource_name", resourceName)
   117  		return false
   118  	}
   119  
   120  	return true
   121  }