/
update.go
81 lines (71 loc) · 3.26 KB
/
update.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
// Copyright 2019 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 controllerutils
import (
"context"
"fmt"
apiequality "k8s.io/apimachinery/pkg/api/equality"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
)
// TypedCreateOrUpdate is like controllerutil.CreateOrUpdate, it retrieves the current state of the object from the
// API server, applies the given mutate func and creates or updates it afterwards. In contrast to
// controllerutil.CreateOrUpdate it tries to create a new typed object of obj's kind (using the provided scheme)
// to make typed Get requests in order to leverage the client's cache.
func TypedCreateOrUpdate(ctx context.Context, c client.Client, scheme *runtime.Scheme, obj *unstructured.Unstructured, alwaysUpdate bool, mutate func() error) (controllerutil.OperationResult, error) {
// client.DelegatingReader does not use its cache for unstructured.Unstructured objects, so we
// create a new typed object of the object's type to use the cache for get calls before applying changes
var current client.Object
if typed, err := scheme.New(obj.GetObjectKind().GroupVersionKind()); err == nil {
var ok bool
current, ok = typed.(client.Object)
if !ok {
return controllerutil.OperationResultNone, fmt.Errorf("object type %q is unsupported", obj.GetObjectKind().GroupVersionKind().String())
}
} else {
// fallback to unstructured request (type might not be registered in scheme)
current = obj
}
if err := c.Get(ctx, client.ObjectKeyFromObject(obj), current); err != nil {
if !apierrors.IsNotFound(err) {
return controllerutil.OperationResultNone, err
}
if err := mutate(); err != nil {
return controllerutil.OperationResultNone, err
}
return controllerutil.OperationResultCreated, c.Create(ctx, obj)
}
var existing *unstructured.Unstructured
// convert object back to unstructured for easy mutating/merging
if _, isUnstructured := current.(*unstructured.Unstructured); !isUnstructured {
u := &unstructured.Unstructured{}
if err := scheme.Convert(current, u, nil); err != nil {
return controllerutil.OperationResultNone, err
}
u.DeepCopyInto(obj)
existing = u
} else {
existing = obj.DeepCopy()
}
if err := mutate(); err != nil {
return controllerutil.OperationResultNone, err
}
if !alwaysUpdate && apiequality.Semantic.DeepEqual(existing, obj) {
return controllerutil.OperationResultNone, nil
}
return controllerutil.OperationResultUpdated, c.Update(ctx, obj)
}