This repository has been archived by the owner on Mar 9, 2022. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 3
/
checkout.go
175 lines (149 loc) · 4.98 KB
/
checkout.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
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
package webhook
import (
"context"
"errors"
"fmt"
"net/http"
pvpoolv1alpha1 "github.com/puppetlabs/pvpool/pkg/apis/pvpool.puppet.com/v1alpha1"
"github.com/puppetlabs/pvpool/pkg/apis/pvpool.puppet.com/validation"
admissionv1 "k8s.io/api/admission/v1"
authorizationv1 "k8s.io/api/authorization/v1"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/meta"
runtime "k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/validation/field"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/runtime/inject"
"sigs.k8s.io/controller-runtime/pkg/webhook"
"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
)
// +kubebuilder:webhook:name=checkout.validate.webhook.pvpool.puppet.com,groups=pvpool.puppet.com,versions=v1alpha1,resources=checkouts,verbs=create;update,path=/validate-pvpool-puppet-com-v1alpha1-checkout,failurePolicy=fail,mutating=false,sideEffects=None,admissionReviewVersions=v1;v1beta1
// +kubebuilder:rbac:groups=authorization.k8s.io,resources=subjectaccessreviews,verbs=create
// CheckoutValidator extends the Checkout type to provide validation.
//
// +kubebuilder:object:root=true
type CheckoutValidator struct {
*pvpoolv1alpha1.Checkout `json:",inline"`
}
var _ webhook.Validator = &CheckoutValidator{}
func (cv *CheckoutValidator) ValidateCreate() error {
return nil
}
func (cv *CheckoutValidator) ValidateUpdate(old runtime.Object) error {
oldCV, ok := old.(*CheckoutValidator)
if !ok {
return fmt.Errorf("unexpected type %T for old object in update", old)
}
var errs field.ErrorList
errs = append(errs, validation.ValidateCheckoutUpdate(cv.Checkout, oldCV.Checkout)...)
if len(errs) != 0 {
return k8serrors.NewInvalid(pvpoolv1alpha1.CheckoutKind.GroupKind(), cv.GetName(), errs)
}
return nil
}
func (cv *CheckoutValidator) ValidateDelete() error {
return nil
}
// CheckoutRBACValidatorHandler performs access control validation for the
// Checkout type.
type CheckoutRBACValidatorHandler struct {
cl client.Client
decoder *admission.Decoder
mapper meta.RESTMapper
}
func (crvh *CheckoutRBACValidatorHandler) Handle(ctx context.Context, req admission.Request) admission.Response {
switch req.Operation {
case admissionv1.Create, admissionv1.Update:
default:
return admission.Allowed("")
}
checkout := &pvpoolv1alpha1.Checkout{}
if err := crvh.decoder.Decode(req, checkout); err != nil {
return admission.Errored(http.StatusBadRequest, err)
}
gvr, err := crvh.mapper.RESTMapping(pvpoolv1alpha1.PoolKind.GroupKind())
if err != nil {
return admission.Errored(http.StatusInternalServerError, err)
}
namespace := checkout.Spec.PoolRef.Namespace
if namespace == "" {
namespace = checkout.GetNamespace()
}
extra := make(map[string]authorizationv1.ExtraValue, len(req.UserInfo.Extra))
for k, v := range req.UserInfo.Extra {
extra[k] = authorizationv1.ExtraValue(v)
}
review := &authorizationv1.SubjectAccessReview{
Spec: authorizationv1.SubjectAccessReviewSpec{
ResourceAttributes: &authorizationv1.ResourceAttributes{
Verb: "use",
Group: gvr.Resource.Group,
Resource: gvr.Resource.Resource,
Namespace: namespace,
Name: checkout.Spec.PoolRef.Name,
},
User: req.UserInfo.Username,
Groups: req.UserInfo.Groups,
Extra: extra,
UID: req.UserInfo.UID,
},
}
if err := crvh.cl.Create(ctx, review); err != nil {
return admission.Errored(http.StatusInternalServerError, err)
}
if !review.Status.Allowed {
var err error
if review.Status.Reason != "" {
err = errors.New(review.Status.Reason)
} else {
err = fmt.Errorf("User %q cannot use resource %q in API group %q in the namespace %q", req.UserInfo.Username, gvr.Resource.Resource, gvr.Resource.Group, namespace)
}
status := k8serrors.NewForbidden(
gvr.Resource.GroupResource(),
checkout.Spec.PoolRef.Name,
err,
).Status()
return admission.Response{
AdmissionResponse: admissionv1.AdmissionResponse{
Allowed: false,
Result: &status,
},
}
}
return admission.Allowed("")
}
var _ admission.DecoderInjector = &CheckoutRBACValidatorHandler{}
var _ inject.Mapper = &CheckoutRBACValidatorHandler{}
func (crvh *CheckoutRBACValidatorHandler) InjectDecoder(d *admission.Decoder) error {
crvh.decoder = d
return nil
}
func (crvh *CheckoutRBACValidatorHandler) InjectMapper(m meta.RESTMapper) error {
crvh.mapper = m
return nil
}
func AddCheckoutValidatorToManager(mgr manager.Manager) error {
mgr.GetWebhookServer().Register(
"/validate-pvpool-puppet-com-v1alpha1-checkout",
&admission.Webhook{
Handler: admission.MultiValidatingHandler(
admission.ValidatingHandlerFor(&CheckoutValidator{}),
&CheckoutRBACValidatorHandler{
cl: mgr.GetClient(),
},
),
},
)
if err := mgr.AddHealthzCheck("checkout", func(_ *http.Request) error {
return nil
}); err != nil {
return err
}
if err := mgr.AddReadyzCheck("checkout", func(_ *http.Request) error {
return nil
}); err != nil {
return err
}
return nil
}