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apis/compute/v1beta1/computebackendservice_reference.go
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| // Copyright 2024 Google LLC | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| package v1beta1 | ||
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| import ( | ||
| "context" | ||
| "fmt" | ||
| "strings" | ||
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| "github.com/GoogleCloudPlatform/k8s-config-connector/pkg/k8s" | ||
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| refsv1beta1 "github.com/GoogleCloudPlatform/k8s-config-connector/apis/refs/v1beta1" | ||
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| "k8s.io/apimachinery/pkg/apis/meta/v1/unstructured" | ||
| "k8s.io/apimachinery/pkg/types" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| ) | ||
|
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| var _ refsv1beta1.ExternalNormalizer = &ComputeBackendServiceRef{} | ||
| var ComputeBackendServiceGVK = GroupVersion.WithKind("ComputeBackendService") | ||
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| // ComputeBackendServiceRef defines the resource reference to ComputeBackendService, which "External" field | ||
| // holds the GCP identifier for the KRM object. | ||
| type ComputeBackendServiceRef struct { | ||
| // The value of an externally managed ComputeBackendService resource. | ||
| // Should be in the format "projects/{{project}}/global/backendServices/{{backendService}}" | ||
| // or "projects/{{project}}/regions/{{region}}/backendServices/{{backendService}}". | ||
| External string `json:"external,omitempty"` | ||
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| // The name of a ComputeBackendService resource. | ||
| Name string `json:"name,omitempty"` | ||
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| // The namespace of a ComputeBackendService resource. | ||
| Namespace string `json:"namespace,omitempty"` | ||
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| //parent *ComputeBackendServiceParent | ||
| } | ||
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| // NormalizedExternal provision the "External" value for other resource that depends on ComputeBackendService. | ||
| // If the "External" is given in the other resource's spec.ComputeBackendServiceRef, the given value will be used. | ||
| // Otherwise, the "Name" and "Namespace" will be used to query the actual ComputeBackendService object from the cluster. | ||
| func (r *ComputeBackendServiceRef) NormalizedExternal(ctx context.Context, reader client.Reader, otherNamespace string) (string, error) { | ||
| // Get value from spec.ComputeBackendServiceRef.external | ||
| if r.External != "" { | ||
| if r.Name != "" { | ||
| return "", fmt.Errorf("cannot specify both name and external on reference") | ||
| } | ||
| // To ensure backward compatibility for existing users, we do not enforce external format here | ||
| return r.External, nil | ||
| } | ||
|
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| if r.Name == "" { | ||
| return "", fmt.Errorf("must specify either name or external on reference") | ||
| } | ||
|
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| // Get value from the Config Connector object | ||
| if r.Namespace == "" { | ||
| r.Namespace = otherNamespace | ||
| } | ||
| key := types.NamespacedName{Name: r.Name, Namespace: r.Namespace} | ||
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| u, err := refsv1beta1.ResolveResourceName(ctx, reader, key, ComputeBackendServiceGVK) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
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| // Get value from object's status.externalRef(only support for objects created by direct controller) | ||
| // This is the most trustworthy place | ||
| actualExternalRef, found1, err1 := unstructured.NestedString(u.Object, "status", "externalRef") | ||
| if !found1 { | ||
| // Get value from object's status.selfLink(support for objects not created by direct controller) | ||
| selfLink, found2, err2 := unstructured.NestedString(u.Object, "status", "selfLink") | ||
| if !found2 { | ||
| return "", fmt.Errorf("cannot get referenced %s %v", u.GetKind(), u.GetNamespace()) | ||
| } | ||
| if err2 != nil || selfLink == "" { | ||
| return "", fmt.Errorf("cannot get selfLink for referenced %s %v (status.selfLink is empty)", u.GetKind(), u.GetNamespace()) | ||
| } | ||
| r.External = selfLink | ||
| return r.External, nil | ||
| } | ||
| if err1 != nil || actualExternalRef == "" { | ||
| return "", fmt.Errorf("cannot get externalRef for referenced %s %v (status.externalRef is empty)", u.GetKind(), u.GetNamespace()) | ||
| } | ||
| r.External = actualExternalRef | ||
| return r.External, nil | ||
| } | ||
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| func (r *ComputeBackendServiceRef) Parent() (*ComputeBackendServiceParent, error) { | ||
| if r.External != "" { | ||
| parent, _, err := ParseComputeBackendServiceExternal(r.External) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return parent, nil | ||
| } | ||
| return nil, fmt.Errorf("ComputeBackendServiceRef not initialized by `NewComputeBackendServiceRef` or resolved by `ResolveExternal`") | ||
| } | ||
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| type ComputeBackendServiceParent struct { | ||
| ProjectID string | ||
| Region string | ||
| } | ||
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| func (p *ComputeBackendServiceParent) String() string { | ||
| if p.Region == "global" { | ||
| return "projects/" + p.ProjectID + "/global" | ||
| } else { | ||
| return "projects/" + p.ProjectID + "/regions/" + p.Region | ||
| } | ||
| } | ||
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| func ParseComputeBackendServiceExternal(external string) (parent *ComputeBackendServiceParent, resourceID string, err error) { | ||
| external = strings.TrimPrefix(external, "/") | ||
| tokens := strings.Split(external, "/") | ||
| if len(tokens) == 5 && tokens[0] == "projects" && tokens[3] == "backendServices" { | ||
| parent = &ComputeBackendServiceParent{ | ||
| ProjectID: tokens[1], | ||
| Region: tokens[2], | ||
| } | ||
| resourceID = tokens[4] | ||
| return parent, resourceID, nil | ||
| } else if len(tokens) == 6 && tokens[0] == "projects" && tokens[2] == "regions" && tokens[4] == "backendServices" { | ||
| parent = &ComputeBackendServiceParent{ | ||
| ProjectID: tokens[1], | ||
| Region: tokens[3], | ||
| } | ||
| resourceID = tokens[5] | ||
| return parent, resourceID, nil | ||
| } | ||
| acceptedFormat := "projects/{{project}}/global/backendServices/{{backendService}} or projects/{{project}}/regions/{{region}}/backendServices/{{backendService}}" | ||
| return nil, "", k8s.NewInvalidFormatError(external, acceptedFormat) | ||
| } |
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