sigs.k8s.io/cluster-api@v1.7.1/exp/runtime/internal/controllers/index.go (about)

     1  /*
     2  Copyright 2021 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 controllers
    18  
    19  import (
    20  	"context"
    21  	"fmt"
    22  
    23  	"github.com/pkg/errors"
    24  	ctrl "sigs.k8s.io/controller-runtime"
    25  	"sigs.k8s.io/controller-runtime/pkg/client"
    26  
    27  	runtimev1 "sigs.k8s.io/cluster-api/exp/runtime/api/v1alpha1"
    28  )
    29  
    30  const (
    31  	// injectCAFromSecretAnnotationField is used by the Extension controller for indexing ExtensionConfigs
    32  	// which have the InjectCAFromSecretAnnotation set.
    33  	injectCAFromSecretAnnotationField = "metadata.annotations[" + runtimev1.InjectCAFromSecretAnnotation + "]"
    34  )
    35  
    36  // indexByExtensionInjectCAFromSecretName adds the index by InjectCAFromSecretAnnotation to the
    37  // managers cache.
    38  func indexByExtensionInjectCAFromSecretName(ctx context.Context, mgr ctrl.Manager) error {
    39  	if err := mgr.GetCache().IndexField(ctx, &runtimev1.ExtensionConfig{},
    40  		injectCAFromSecretAnnotationField,
    41  		extensionConfigByInjectCAFromSecretName,
    42  	); err != nil {
    43  		return errors.Wrap(err, "error setting index field for InjectCAFromSecretAnnotation")
    44  	}
    45  	return nil
    46  }
    47  
    48  func extensionConfigByInjectCAFromSecretName(o client.Object) []string {
    49  	extensionConfig, ok := o.(*runtimev1.ExtensionConfig)
    50  	if !ok {
    51  		panic(fmt.Sprintf("Expected ExtensionConfig but got a %T", o))
    52  	}
    53  	if value, ok := extensionConfig.Annotations[runtimev1.InjectCAFromSecretAnnotation]; ok {
    54  		return []string{value}
    55  	}
    56  	return nil
    57  }