forked from knative/serving
/
certificate.go
301 lines (264 loc) · 11.5 KB
/
certificate.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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
/*
Copyright 2019 The Knative 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 certificate
import (
"context"
"fmt"
"hash/adler32"
"reflect"
"strconv"
"k8s.io/apimachinery/pkg/util/sets"
cmv1alpha2 "github.com/jetstack/cert-manager/pkg/apis/certmanager/v1alpha2"
cmmeta "github.com/jetstack/cert-manager/pkg/apis/meta/v1"
"go.uber.org/zap"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/equality"
apierrs "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/selection"
kubelisters "k8s.io/client-go/listers/core/v1"
"k8s.io/client-go/tools/cache"
"knative.dev/pkg/apis"
"knative.dev/pkg/controller"
"knative.dev/pkg/logging"
"knative.dev/pkg/tracker"
"knative.dev/serving/pkg/apis/networking/v1alpha1"
certmanagerclientset "knative.dev/serving/pkg/client/certmanager/clientset/versioned"
acmelisters "knative.dev/serving/pkg/client/certmanager/listers/acme/v1alpha2"
certmanagerlisters "knative.dev/serving/pkg/client/certmanager/listers/certmanager/v1alpha2"
listers "knative.dev/serving/pkg/client/listers/networking/v1alpha1"
"knative.dev/serving/pkg/reconciler"
"knative.dev/serving/pkg/reconciler/certificate/config"
"knative.dev/serving/pkg/reconciler/certificate/resources"
)
const (
noCMConditionReason = "NoCertManagerCertCondition"
noCMConditionMessage = "The ready condition of Cert Manager Certifiate does not exist."
notReconciledReason = "ReconcileFailed"
notReconciledMessage = "Cert-Manager certificate has not yet been reconciled."
httpDomainLabel = "acme.cert-manager.io/http-domain"
httpChallengePath = "/.well-known/acme-challenge"
)
// It comes from cert-manager status:
// https://github.com/jetstack/cert-manager/blob/b7e83b53820e712e7cf6b8dce3e5a050f249da79/pkg/controller/certificates/sync.go#L130
var notReadyReasons = sets.NewString("InProgress", "Pending", "TemporaryCertificate")
// Reconciler implements controller.Reconciler for Certificate resources.
type Reconciler struct {
*reconciler.Base
// listers index properties about resources
knCertificateLister listers.CertificateLister
cmCertificateLister certmanagerlisters.CertificateLister
cmChallengeLister acmelisters.ChallengeLister
cmIssuerLister certmanagerlisters.ClusterIssuerLister
svcLister kubelisters.ServiceLister
certManagerClient certmanagerclientset.Interface
tracker tracker.Interface
configStore reconciler.ConfigStore
}
// Check that our Reconciler implements controller.Reconciler
var _ controller.Reconciler = (*Reconciler)(nil)
// Reconcile compares the actual state with the desired, and attempts to
// converge the two. It then updates the Status block of the Certificate resource
// with the current status of the resource.
func (c *Reconciler) Reconcile(ctx context.Context, key string) error {
logger := logging.FromContext(ctx)
ctx = c.configStore.ToContext(ctx)
namespace, name, err := cache.SplitMetaNamespaceKey(key)
if err != nil {
logger.Errorw("Invalid resource key", zap.Error(err))
return nil
}
original, err := c.knCertificateLister.Certificates(namespace).Get(name)
if apierrs.IsNotFound(err) {
logger.Info("Knative Certificate in work queue no longer exists")
return nil
} else if err != nil {
return err
}
// Don't modify the informers copy
knCert := original.DeepCopy()
// Reconcile this copy of the Certificate and then write back any status
// updates regardless of whether the reconciliation errored out.
err = c.reconcile(ctx, knCert)
if err != nil {
logger.Warnw("Failed to reconcile certificate", zap.Error(err))
c.Recorder.Event(knCert, corev1.EventTypeWarning, "InternalError", err.Error())
knCert.Status.MarkNotReady(notReconciledReason, notReconciledMessage)
}
if equality.Semantic.DeepEqual(original.Status, knCert.Status) {
// If we didn't change anything then don't call updateStatus.
// This is important because the copy we loaded from the informer's
// cache may be stale and we don't want to overwrite a prior update
// to status with this stale state.
} else if err := c.updateStatus(original, knCert); err != nil {
logger.Warnw("Failed to update certificate status", zap.Error(err))
c.Recorder.Eventf(knCert, corev1.EventTypeWarning, "UpdateFailed",
"Failed to update status for Certificate %s: %v", key, err)
return err
}
return err
}
func (c *Reconciler) reconcile(ctx context.Context, knCert *v1alpha1.Certificate) error {
logger := logging.FromContext(ctx)
knCert.SetDefaults(ctx)
knCert.Status.InitializeConditions()
logger.Infof("Reconciling Cert-Manager certificate for Knative cert %s/%s.", knCert.Namespace, knCert.Name)
knCert.Status.ObservedGeneration = knCert.Generation
cmConfig := config.FromContext(ctx).CertManager
cmCert := resources.MakeCertManagerCertificate(cmConfig, knCert)
cmCert, err := c.reconcileCMCertificate(ctx, knCert, cmCert)
if err != nil {
return err
}
knCert.Status.NotAfter = cmCert.Status.NotAfter
// Propagate cert-manager Certificate status to Knative Certificate.
cmCertReadyCondition := resources.GetReadyCondition(cmCert)
logger.Infof("cm cert condition %v.", cmCertReadyCondition)
switch {
case cmCertReadyCondition == nil:
knCert.Status.MarkNotReady(noCMConditionReason, noCMConditionMessage)
return c.setHTTP01Challenges(knCert, cmCert)
case cmCertReadyCondition.Status == cmmeta.ConditionUnknown:
knCert.Status.MarkNotReady(cmCertReadyCondition.Reason, cmCertReadyCondition.Message)
return c.setHTTP01Challenges(knCert, cmCert)
case cmCertReadyCondition.Status == cmmeta.ConditionTrue:
knCert.Status.MarkReady()
knCert.Status.HTTP01Challenges = []v1alpha1.HTTP01Challenge{}
case cmCertReadyCondition.Status == cmmeta.ConditionFalse:
if notReadyReasons.Has(cmCertReadyCondition.Reason) {
knCert.Status.MarkNotReady(cmCertReadyCondition.Reason, cmCertReadyCondition.Message)
} else {
knCert.Status.MarkFailed(cmCertReadyCondition.Reason, cmCertReadyCondition.Message)
}
return c.setHTTP01Challenges(knCert, cmCert)
}
return nil
}
func (c *Reconciler) reconcileCMCertificate(ctx context.Context, knCert *v1alpha1.Certificate, desired *cmv1alpha2.Certificate) (*cmv1alpha2.Certificate, error) {
cmCert, err := c.cmCertificateLister.Certificates(desired.Namespace).Get(desired.Name)
if apierrs.IsNotFound(err) {
cmCert, err = c.certManagerClient.CertmanagerV1alpha2().Certificates(desired.Namespace).Create(desired)
if err != nil {
c.Recorder.Eventf(knCert, corev1.EventTypeWarning, "CreationFailed",
"Failed to create Cert-Manager Certificate %s/%s: %v", desired.Name, desired.Namespace, err)
return nil, fmt.Errorf("failed to create Cert-Manager Certificate: %w", err)
}
c.Recorder.Eventf(knCert, corev1.EventTypeNormal, "Created",
"Created Cert-Manager Certificate %s/%s", desired.Namespace, desired.Name)
} else if err != nil {
return nil, fmt.Errorf("failed to get Cert-Manager Certificate: %w", err)
} else if !metav1.IsControlledBy(desired, knCert) {
knCert.Status.MarkResourceNotOwned("CertManagerCertificate", desired.Name)
return nil, fmt.Errorf("knative Certificate %s in namespace %s does not own CertManager Certificate: %s", knCert.Name, knCert.Namespace, desired.Name)
} else if !equality.Semantic.DeepEqual(cmCert.Spec, desired.Spec) {
copy := cmCert.DeepCopy()
copy.Spec = desired.Spec
updated, err := c.certManagerClient.CertmanagerV1alpha2().Certificates(copy.Namespace).Update(copy)
if err != nil {
c.Recorder.Eventf(knCert, corev1.EventTypeWarning, "UpdateFailed",
"Failed to create Cert-Manager Certificate %s/%s: %v", desired.Namespace, desired.Name, err)
return nil, fmt.Errorf("failed to update Cert-Manager Certificate: %w", err)
}
c.Recorder.Eventf(knCert, corev1.EventTypeNormal, "Updated",
"Updated Spec for Cert-Manager Certificate %s/%s", desired.Namespace, desired.Name)
return updated, nil
}
return cmCert, nil
}
func (c *Reconciler) updateStatus(existing *v1alpha1.Certificate, desired *v1alpha1.Certificate) error {
existing = existing.DeepCopy()
return reconciler.RetryUpdateConflicts(func(attempts int) (err error) {
// The first iteration tries to use the informer's state, subsequent attempts fetch the latest state via API.
if attempts > 0 {
existing, err = c.ServingClientSet.NetworkingV1alpha1().Certificates(desired.Namespace).Get(desired.Name, metav1.GetOptions{})
if err != nil {
return err
}
}
// If there's nothing to update, just return.
if reflect.DeepEqual(existing.Status, desired.Status) {
return nil
}
existing.Status = desired.Status
_, err = c.ServingClientSet.NetworkingV1alpha1().Certificates(existing.Namespace).UpdateStatus(existing)
return err
})
}
func (c *Reconciler) setHTTP01Challenges(knCert *v1alpha1.Certificate, cmCert *cmv1alpha2.Certificate) error {
if isHTTP, err := c.isHTTPChallenge(cmCert); err != nil {
return err
} else if !isHTTP {
return nil
}
challenges := make([]v1alpha1.HTTP01Challenge, 0, len(cmCert.Spec.DNSNames))
for _, dnsName := range cmCert.Spec.DNSNames {
// This selector comes from https://github.com/jetstack/cert-manager/blob/1b9b83a4b80068207b0a8070dadb0e760f5095f6/pkg/issuer/acme/http/pod.go#L34
selector := labels.NewSelector()
value := strconv.FormatUint(uint64(adler32.Checksum([]byte(dnsName))), 10)
req, err := labels.NewRequirement(httpDomainLabel, selection.Equals, []string{value})
if err != nil {
return fmt.Errorf("failed to create requirement %s=%s: %w", httpDomainLabel, value, err)
}
selector = selector.Add(*req)
svcs, err := c.svcLister.Services(knCert.Namespace).List(selector)
if err != nil {
return fmt.Errorf("failed to list services: %w", err)
}
if len(svcs) == 0 {
return fmt.Errorf("no challenge solver service for domain %s", dnsName)
}
for _, svc := range svcs {
if err := c.tracker.Track(svcRef(svc.Namespace, svc.Name), knCert); err != nil {
return err
}
owner := svc.GetOwnerReferences()[0]
cmChallenge, err := c.cmChallengeLister.Challenges(knCert.Namespace).Get(owner.Name)
if err != nil {
return err
}
challenge := v1alpha1.HTTP01Challenge{
ServiceName: svc.Name,
ServicePort: svc.Spec.Ports[0].TargetPort,
ServiceNamespace: svc.Namespace,
URL: &apis.URL{
Scheme: "http",
Path: fmt.Sprintf("%s/%s", httpChallengePath, cmChallenge.Spec.Token),
Host: cmChallenge.Spec.DNSName,
},
}
challenges = append(challenges, challenge)
}
}
knCert.Status.HTTP01Challenges = challenges
return nil
}
func (c *Reconciler) isHTTPChallenge(cmCert *cmv1alpha2.Certificate) (bool, error) {
if issuer, err := c.cmIssuerLister.Get(cmCert.Spec.IssuerRef.Name); err != nil {
return false, err
} else {
return issuer.Spec.ACME != nil &&
len(issuer.Spec.ACME.Solvers) > 0 &&
issuer.Spec.ACME.Solvers[0].HTTP01 != nil, nil
}
}
func svcRef(namespace, name string) corev1.ObjectReference {
gvk := corev1.SchemeGroupVersion.WithKind("Service")
apiVersion, kind := gvk.ToAPIVersionAndKind()
return corev1.ObjectReference{
APIVersion: apiVersion,
Kind: kind,
Namespace: namespace,
Name: name,
}
}