FilesExpand file tree

 master

/

mutatingwebhook.go

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

83 lines (67 loc) · 2.31 KB

 master

/

mutatingwebhook.go

Copy path

Top

File metadata and controls

• Code
• Blame

83 lines (67 loc) · 2.31 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

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

82

83

/*

Copyright 2018 The Kubernetes Authors.

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 main

import (

"context"

"net/http"

corev1 "k8s.io/api/core/v1"

"sigs.k8s.io/controller-runtime/pkg/client"

"sigs.k8s.io/controller-runtime/pkg/runtime/inject"

"sigs.k8s.io/controller-runtime/pkg/webhook/admission"

"sigs.k8s.io/controller-runtime/pkg/webhook/admission/types"

)

// podAnnotator annotates Pods

type podAnnotator struct {

client client.Client

decoder types.Decoder

}

// Implement admission.Handler so the controller can handle admission request.

var _ admission.Handler = &podAnnotator{}

// podAnnotator adds an annotation to every incoming pods.

func (a *podAnnotator) Handle(ctx context.Context, req types.Request) types.Response {

pod := &corev1.Pod{}

err := a.decoder.Decode(req, pod)

if err != nil {

return admission.ErrorResponse(http.StatusBadRequest, err)

}

copy := pod.DeepCopy()

err = a.mutatePodsFn(ctx, copy)

if err != nil {

return admission.ErrorResponse(http.StatusInternalServerError, err)

}

return admission.PatchResponse(pod, copy)

}

// mutatePodsFn add an annotation to the given pod

func (a *podAnnotator) mutatePodsFn(ctx context.Context, pod *corev1.Pod) error {

if pod.Annotations == nil {

pod.Annotations = map[string]string{}

}

pod.Annotations["example-mutating-admission-webhook"] = "foo"

return nil

}

// podValidator implements inject.Client.

// A client will be automatically injected.

var _ inject.Client = &podValidator{}

// InjectClient injects the client.

func (v *podAnnotator) InjectClient(c client.Client) error {

v.client = c

return nil

}

// podValidator implements inject.Decoder.

// A decoder will be automatically injected.

var _ inject.Decoder = &podValidator{}

// InjectDecoder injects the decoder.

func (v *podAnnotator) InjectDecoder(d types.Decoder) error {

v.decoder = d

return nil

}