dns_record_set.go

Documentation: github.com/GoogleCloudPlatform/k8s-config-connector/pkg/resourceoverrides

     1  // Copyright 2022 Google LLC
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package resourceoverrides
    16  
    17  import (
    18  	"fmt"
    19  
    20  	"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/k8s"
    21  
    22  	"github.com/hashicorp/terraform-plugin-sdk/v2/terraform"
    23  	apiextensions "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
    24  	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
    25  )
    26  
    27  var (
    28  	rrdatasFieldName     = "rrdatas"
    29  	rrdatasRefsFieldName = "rrdatasRefs"
    30  )
    31  
    32  func GetDNSRecordSetOverrides() ResourceOverrides {
    33  	ro := ResourceOverrides{
    34  		Kind: "DNSRecordSet",
    35  	}
    36  	// Preserve the legacy non-reference field 'rrdatas' after it is changed to
    37  	// a reference field, 'rrdatasRefs'.
    38  	ro.Overrides = append(ro.Overrides, preserveRrdatasFieldAndEnsureRrdatasRefsFieldIsMultiKind())
    39  	return ro
    40  }
    41  
    42  func preserveRrdatasFieldAndEnsureRrdatasRefsFieldIsMultiKind() ResourceOverride {
    43  	o := ResourceOverride{}
    44  	o.CRDDecorate = func(crd *apiextensions.CustomResourceDefinition) error {
    45  
    46  		if err := PreserveMutuallyExclusiveNonReferenceField(crd, nil, rrdatasRefsFieldName, rrdatasFieldName); err != nil {
    47  			return fmt.Errorf("error preserving '%v' field in DNSRecordSet: %w", rrdatasFieldName, err)
    48  		}
    49  		if err := EnsureReferenceFieldIsMultiKind(crd, nil, rrdatasRefsFieldName, []string{"ComputeAddress"}); err != nil {
    50  			return fmt.Errorf("error ensuring '%v' field in DNSRecordSet is a multi-kind reference field: %w", rrdatasRefsFieldName, err)
    51  		}
    52  		return nil
    53  	}
    54  	o.PreActuationTransform = func(r *k8s.Resource) error {
    55  		if err := FavorReferenceArrayFieldOverNonReferenceArrayField(r, []string{rrdatasFieldName}, []string{rrdatasRefsFieldName}); err != nil {
    56  			return fmt.Errorf("error handling '%v' and '%v' fields in pre-actuation transformation: %w", rrdatasFieldName, rrdatasRefsFieldName, err)
    57  		}
    58  		return nil
    59  	}
    60  	o.PostActuationTransform = func(original, reconciled *k8s.Resource, tfState *terraform.InstanceState, dclState *unstructured.Unstructured) error {
    61  		if err := PreserveUserSpecifiedLegacyArrayField(original, reconciled, []string{rrdatasFieldName}...); err != nil {
    62  			return fmt.Errorf("error preserving user-specified '%v' in post-actuation transformation: %w", rrdatasFieldName, err)
    63  		}
    64  		if err := PruneDefaultedAuthoritativeArrayFieldIfOnlyLegacyArrayFieldSpecified(original, reconciled, []string{rrdatasFieldName}, []string{rrdatasRefsFieldName}); err != nil {
    65  			return fmt.Errorf("error conditionally pruning defaulted '%v' in post-actuation transformation: %w", rrdatasRefsFieldName, err)
    66  		}
    67  		return nil
    68  	}
    69  	return o
    70  }
    71
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