/
actions.go
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/
actions.go
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// Copyright 2016-2022, Pulumi Corporation.
//
// 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 ssa
import (
"context"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/dynamic"
"sigs.k8s.io/yaml"
)
// Relinquish is used to "undo" a patch operation by relinquishing management of all fields in a resource for the
// specified field manager. Any fields that no longer have a manager will return to a default value, so this isn't
// guaranteed to return the resource back to the same state that it was in before the patch.
//
// This operation will fail unless another manager is responsible for a valid resource spec. In other words, if the
// specified field manager is the sole manager of a resource, then this will fail with a validation error for most
// resources.
func Relinquish(
ctx context.Context,
client dynamic.ResourceInterface,
input *unstructured.Unstructured,
fieldManager string,
) error {
// Create a minimal resource spec with the same identity as the input resource.
obj := unstructured.Unstructured{}
obj.SetAPIVersion(input.GetAPIVersion())
obj.SetKind(input.GetKind())
obj.SetNamespace(input.GetNamespace())
obj.SetName(input.GetName())
yamlObj, err := yaml.Marshal(obj.Object)
if err != nil {
return err
}
// Patching with a minimal spec tells the cluster that this field manager will no longer be managing any fields.
_, err = client.Patch(ctx, input.GetName(), types.ApplyPatchType, yamlObj,
metav1.PatchOptions{
FieldManager: fieldManager,
})
return err
}