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Merge pull request GoogleCloudPlatform#2559 from jasonvigil/cloudsql-…
…rolloutgate Add predicate to partially enable SQLInstance direct reconciler
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,149 @@ | ||
| // Copyright 2022 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. | ||
|
|
||
| package predicate | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| "k8s.io/apimachinery/pkg/apis/meta/v1/unstructured" | ||
| "k8s.io/apimachinery/pkg/runtime/schema" | ||
| "k8s.io/apimachinery/pkg/types" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| "sigs.k8s.io/controller-runtime/pkg/event" | ||
| k8spredicate "sigs.k8s.io/controller-runtime/pkg/predicate" | ||
| ) | ||
|
|
||
| // ReconcileGate allows controllers to select which resources they are enabled for, based on | ||
| // features of the resource to-be-reconciled. This allows for partially enabling a controller. | ||
| type ReconcileGate interface { | ||
| // ShouldReconcile returns true if the reconciler should be used to for the resource. | ||
| ShouldReconcile(o *unstructured.Unstructured) bool | ||
| } | ||
|
|
||
| // ReconcilePredicate generates a controller-runtime predicate based on a ReconcileGate. | ||
| type ReconcilePredicate struct { | ||
| gvk schema.GroupVersionKind | ||
| rg ReconcileGate | ||
| c client.Client | ||
| } | ||
|
|
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| var _ k8spredicate.Predicate = &ReconcilePredicate{} | ||
|
|
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| func NewReconcilePredicate(c client.Client, gvk schema.GroupVersionKind, rg ReconcileGate) *ReconcilePredicate { | ||
| return &ReconcilePredicate{ | ||
| c: c, | ||
| gvk: gvk, | ||
| rg: rg, | ||
| } | ||
| } | ||
|
|
||
| func (p *ReconcilePredicate) Create(e event.CreateEvent) bool { | ||
| obj, err := getUnstructuredObjWithGVK(p.c, e.Object, p.gvk) | ||
| if err != nil { | ||
| return false | ||
| } | ||
| return p.rg.ShouldReconcile(obj) | ||
| } | ||
|
|
||
| func (p *ReconcilePredicate) Delete(e event.DeleteEvent) bool { | ||
| obj, err := getUnstructuredObjWithGVK(p.c, e.Object, p.gvk) | ||
| if err != nil { | ||
| return false | ||
| } | ||
| return p.rg.ShouldReconcile(obj) | ||
| } | ||
|
|
||
| func (p *ReconcilePredicate) Update(e event.UpdateEvent) bool { | ||
| obj, err := getUnstructuredObjWithGVK(p.c, e.ObjectNew, p.gvk) | ||
| if err != nil { | ||
| return false | ||
| } | ||
| return p.rg.ShouldReconcile(obj) | ||
| } | ||
|
|
||
| func (p *ReconcilePredicate) Generic(e event.GenericEvent) bool { | ||
| obj, err := getUnstructuredObjWithGVK(p.c, e.Object, p.gvk) | ||
| if err != nil { | ||
| return false | ||
| } | ||
| return p.rg.ShouldReconcile(obj) | ||
| } | ||
|
|
||
| // InverseReconcilePredicate generates a controller-runtime predicate based on the inverse of a ReconcileGate. | ||
| type InverseReconcilePredicate struct { | ||
| gvk schema.GroupVersionKind | ||
| rg ReconcileGate | ||
| c client.Client | ||
| } | ||
|
|
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| var _ k8spredicate.Predicate = &InverseReconcilePredicate{} | ||
|
|
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| func NewInverseReconcilePredicate(c client.Client, gvk schema.GroupVersionKind, rg ReconcileGate) *InverseReconcilePredicate { | ||
| return &InverseReconcilePredicate{ | ||
| c: c, | ||
| gvk: gvk, | ||
| rg: rg, | ||
| } | ||
| } | ||
|
|
||
| func (p *InverseReconcilePredicate) Create(e event.CreateEvent) bool { | ||
| obj, err := getUnstructuredObjWithGVK(p.c, e.Object, p.gvk) | ||
| if err != nil { | ||
| return false | ||
| } | ||
| return !p.rg.ShouldReconcile(obj) | ||
| } | ||
|
|
||
| func (p *InverseReconcilePredicate) Delete(e event.DeleteEvent) bool { | ||
| obj, err := getUnstructuredObjWithGVK(p.c, e.Object, p.gvk) | ||
| if err != nil { | ||
| return false | ||
| } | ||
| return !p.rg.ShouldReconcile(obj) | ||
| } | ||
|
|
||
| func (p *InverseReconcilePredicate) Update(e event.UpdateEvent) bool { | ||
| obj, err := getUnstructuredObjWithGVK(p.c, e.ObjectNew, p.gvk) | ||
| if err != nil { | ||
| return false | ||
| } | ||
| return !p.rg.ShouldReconcile(obj) | ||
| } | ||
|
|
||
| func (p *InverseReconcilePredicate) Generic(e event.GenericEvent) bool { | ||
| obj, err := getUnstructuredObjWithGVK(p.c, e.Object, p.gvk) | ||
| if err != nil { | ||
| return false | ||
| } | ||
| return !p.rg.ShouldReconcile(obj) | ||
| } | ||
|
|
||
| // getUnstructuredObjWithGVK uses the provided client to fetch an object (as unstructured) with a given GVK. | ||
| // This helper fn is necessary for the ReconcileGate predicates because both the direct and terraform | ||
| // controllers specify the option `builder.OnlyMetadata` to only cache metadata about the objects they are | ||
| // watching. Therefore, the objects provided to the predicate fns are only `metav1.PartialObjectMetadata` | ||
| // types, and do not contain any of the spec values. | ||
| func getUnstructuredObjWithGVK(c client.Client, o client.Object, gvk schema.GroupVersionKind) (*unstructured.Unstructured, error) { | ||
| obj := &unstructured.Unstructured{} | ||
| obj.SetGroupVersionKind(gvk) | ||
| key := types.NamespacedName{ | ||
| Name: o.GetName(), | ||
| Namespace: o.GetNamespace(), | ||
| } | ||
| if err := c.Get(context.Background(), key, obj); err != nil { | ||
| return nil, err | ||
| } | ||
| return obj, nil | ||
| } |
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