forked from rook/rook
subhamkrai
382ca4acca
this commit bump controller runtime version to 0.9 and kubernetes version to v1.21.1. Signed-off-by: subhamkrai <srai@redhat.com>
111 lines
2.9 KiB
Go
111 lines
2.9 KiB
Go
/*
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Copyright 2020 The Rook Authors. All rights reserved.
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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 k8sutil
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import (
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"context"
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"reflect"
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"github.com/pkg/errors"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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"k8s.io/apimachinery/pkg/runtime"
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kerrors "k8s.io/apimachinery/pkg/util/errors"
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"sigs.k8s.io/controller-runtime/pkg/client"
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)
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// Patcher is a utility for patching of objects and their status.
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// Portion of this file is coming from https://github.com/kubernetes-sigs/cluster-api/blob/master/util/patch/patch.go
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type Patcher struct {
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client client.Client
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hasStatus bool
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old map[string]interface{}
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oldStatus interface{}
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objectPatch client.Patch
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statusPatch client.Patch
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}
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func NewPatcher(object client.Object, crclient client.Client) (*Patcher, error) {
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if object == nil {
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return nil, errors.Errorf("expected non-nil resource")
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}
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if _, ok := object.(runtime.Unstructured); ok {
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object = object.DeepCopyObject().(client.Object)
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}
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old, err := runtime.DefaultUnstructuredConverter.ToUnstructured(object)
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if err != nil {
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return nil, err
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}
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hasStatus := false
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oldStatus, ok, err := unstructured.NestedFieldCopy(old, "status")
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if err != nil {
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return nil, err
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}
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if ok {
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hasStatus = true
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unstructured.RemoveNestedField(old, "status")
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}
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return &Patcher{
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client: crclient,
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hasStatus: hasStatus,
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old: old,
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oldStatus: oldStatus,
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objectPatch: client.MergeFrom(object.DeepCopyObject().(client.Object)),
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statusPatch: client.MergeFrom(object.DeepCopyObject().(client.Object)),
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}, nil
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}
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func (p *Patcher) Patch(ctx context.Context, object client.Object) error {
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if object == nil {
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return errors.Errorf("expected non-nil resource")
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}
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newObj, err := runtime.DefaultUnstructuredConverter.ToUnstructured(object)
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if err != nil {
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return err
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}
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hasStatus := false
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newStatus, ok, err := unstructured.NestedFieldCopy(newObj, "status")
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if err != nil {
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return err
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}
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if ok {
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hasStatus = true
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unstructured.RemoveNestedField(newObj, "status")
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}
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var errs []error
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if !reflect.DeepEqual(p.old, newObj) {
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if err := p.client.Patch(ctx, object, p.objectPatch); err != nil {
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errs = append(errs, err)
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}
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}
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if (p.hasStatus || hasStatus) && !reflect.DeepEqual(p.oldStatus, newStatus) {
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if err := p.client.Status().Patch(ctx, object, p.statusPatch); err != nil {
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errs = append(errs, err)
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}
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}
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return kerrors.NewAggregate(errs)
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}
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