106 lines
3.5 KiB
Go
106 lines
3.5 KiB
Go
/*
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Copyright 2020 The Crossplane Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package resource
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import (
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"context"
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"github.com/pkg/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"sigs.k8s.io/controller-runtime/pkg/client"
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"github.com/crossplane/crossplane-runtime/apis/core/v1alpha1"
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"github.com/crossplane/crossplane-runtime/pkg/meta"
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)
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const (
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errMissingPCRef = "managed resource does not reference a ProviderConfig"
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errApplyPCU = "cannot apply ProviderConfigUsage"
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)
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type errMissingRef struct{ error }
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func (m errMissingRef) MissingReference() bool { return true }
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// IsMissingReference returns true if an error indicates that a managed
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// resource is missing a required reference..
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func IsMissingReference(err error) bool {
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_, ok := err.(interface {
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MissingReference() bool
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})
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return ok
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}
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// A Tracker tracks managed resources.
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type Tracker interface {
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// Track the supplied managed resource.
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Track(ctx context.Context, mg Managed) error
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}
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// A TrackerFn is a function that tracks managed resources.
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type TrackerFn func(ctx context.Context, mg Managed) error
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// Track the supplied managed resource.
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func (fn TrackerFn) Track(ctx context.Context, mg Managed) error {
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return fn(ctx, mg)
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}
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// A ProviderConfigUsageTracker tracks usages of a ProviderConfig by creating or
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// updating the appropriate ProviderConfigUsage.
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type ProviderConfigUsageTracker struct {
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c Applicator
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of ProviderConfigUsage
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}
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// NewProviderConfigUsageTracker creates a ProviderConfigUsageTracker.
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func NewProviderConfigUsageTracker(c client.Client, of ProviderConfigUsage) *ProviderConfigUsageTracker {
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return &ProviderConfigUsageTracker{c: NewAPIUpdatingApplicator(c), of: of}
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}
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// Track that the supplied Managed resource is using the ProviderConfig it
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// references by creating or updating a ProviderConfigUsage. Track should be
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// called _before_ attempting to use the ProviderConfig. This ensures the
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// managed resource's usage is updated if the managed resource is updated to
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// reference a misconfigured ProviderConfig.
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func (u *ProviderConfigUsageTracker) Track(ctx context.Context, mg Managed) error {
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pcu := u.of.DeepCopyObject().(ProviderConfigUsage)
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gvk := mg.GetObjectKind().GroupVersionKind()
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ref := mg.GetProviderConfigReference()
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if ref == nil {
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return errMissingRef{errors.New(errMissingPCRef)}
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}
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pcu.SetName(string(mg.GetUID()))
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pcu.SetLabels(map[string]string{v1alpha1.LabelKeyProviderName: ref.Name})
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pcu.SetOwnerReferences([]metav1.OwnerReference{meta.AsController(meta.TypedReferenceTo(mg, gvk))})
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pcu.SetProviderConfigReference(v1alpha1.Reference{Name: ref.Name})
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pcu.SetResourceReference(v1alpha1.TypedReference{
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APIVersion: gvk.GroupVersion().String(),
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Kind: gvk.Kind,
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Name: mg.GetName(),
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})
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err := u.c.Apply(ctx, pcu,
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MustBeControllableBy(mg.GetUID()),
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AllowUpdateIf(func(current, _ runtime.Object) bool {
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return current.(ProviderConfigUsage).GetProviderConfigReference() != pcu.GetProviderConfigReference()
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}),
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)
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return errors.Wrap(Ignore(IsNotAllowed, err), errApplyPCU)
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}
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