-
Notifications
You must be signed in to change notification settings - Fork 458
/
actuator.go
112 lines (92 loc) · 4.8 KB
/
actuator.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
// Copyright 2021 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 dnsrecord
import (
"context"
"regexp"
"strings"
"github.com/go-logr/logr"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/manager"
extensionscontroller "github.com/gardener/gardener/extensions/pkg/controller"
"github.com/gardener/gardener/extensions/pkg/controller/dnsrecord"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
resourcesv1alpha1 "github.com/gardener/gardener/pkg/apis/resources/v1alpha1"
)
type actuator struct {
client client.Client
}
// NewActuator creates a new Actuator that updates the status of the handled DNSRecord resources.
func NewActuator(mgr manager.Manager) dnsrecord.Actuator {
return &actuator{
client: mgr.GetClient(),
}
}
func (a *actuator) Reconcile(ctx context.Context, _ logr.Logger, dnsrecord *extensionsv1alpha1.DNSRecord, cluster *extensionscontroller.Cluster) error {
return a.reconcile(ctx, dnsrecord, cluster, updateCoreDNSRewriteRule)
}
func (a *actuator) Delete(ctx context.Context, _ logr.Logger, dnsrecord *extensionsv1alpha1.DNSRecord, cluster *extensionscontroller.Cluster) error {
return a.reconcile(ctx, dnsrecord, cluster, deleteCoreDNSRewriteRule)
}
func (a *actuator) ForceDelete(ctx context.Context, log logr.Logger, dnsrecord *extensionsv1alpha1.DNSRecord, cluster *extensionscontroller.Cluster) error {
return a.Delete(ctx, log, dnsrecord, cluster)
}
func (a *actuator) reconcile(ctx context.Context, dnsRecord *extensionsv1alpha1.DNSRecord, cluster *extensionscontroller.Cluster, mutateCorednsRules func(corednsConfig *corev1.ConfigMap, dnsRecord *extensionsv1alpha1.DNSRecord, zone *string)) error {
return a.updateCoreDNSRewritingRules(ctx, dnsRecord, cluster, mutateCorednsRules)
}
func (a *actuator) Migrate(ctx context.Context, log logr.Logger, dnsrecord *extensionsv1alpha1.DNSRecord, cluster *extensionscontroller.Cluster) error {
return a.Delete(ctx, log, dnsrecord, cluster)
}
func (a *actuator) Restore(ctx context.Context, log logr.Logger, dnsrecord *extensionsv1alpha1.DNSRecord, cluster *extensionscontroller.Cluster) error {
return a.Reconcile(ctx, log, dnsrecord, cluster)
}
func (a *actuator) updateCoreDNSRewritingRules(
ctx context.Context,
dnsRecord *extensionsv1alpha1.DNSRecord,
cluster *extensionscontroller.Cluster,
mutateCorednsRules func(corednsConfig *corev1.ConfigMap, dnsRecord *extensionsv1alpha1.DNSRecord, zone *string),
) error {
// Only handle dns records for kube-apiserver
if dnsRecord == nil || !strings.HasPrefix(dnsRecord.Spec.Name, "api.") || !strings.HasSuffix(dnsRecord.Spec.Name, ".local.gardener.cloud") {
return nil
}
namespace := &corev1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: dnsRecord.Namespace}}
if err := a.client.Get(ctx, client.ObjectKeyFromObject(namespace), namespace); err != nil {
return err
}
var zone *string
if zones, ok := namespace.Annotations[resourcesv1alpha1.HighAvailabilityConfigZones]; ok && !strings.Contains(zones, ",") && len(cluster.Seed.Spec.Provider.Zones) > 1 {
zone = &zones
}
corednsConfig := &corev1.ConfigMap{ObjectMeta: metav1.ObjectMeta{Name: "coredns-custom", Namespace: "gardener-extension-provider-local-coredns"}}
if err := a.client.Get(ctx, client.ObjectKeyFromObject(corednsConfig), corednsConfig); err != nil {
return err
}
originalConfig := corednsConfig.DeepCopy()
mutateCorednsRules(corednsConfig, dnsRecord, zone)
return a.client.Patch(ctx, corednsConfig, client.MergeFrom(originalConfig))
}
func deleteCoreDNSRewriteRule(corednsConfig *corev1.ConfigMap, dnsRecord *extensionsv1alpha1.DNSRecord, _ *string) {
delete(corednsConfig.Data, dnsRecord.Spec.Name+".override")
}
func updateCoreDNSRewriteRule(corednsConfig *corev1.ConfigMap, dnsRecord *extensionsv1alpha1.DNSRecord, zone *string) {
istioNamespaceSuffix := ""
if zone != nil {
istioNamespaceSuffix = "--" + *zone
}
corednsConfig.Data[dnsRecord.Spec.Name+".override"] =
"rewrite stop name regex " + regexp.QuoteMeta(dnsRecord.Spec.Name) + " istio-ingressgateway.istio-ingress" + istioNamespaceSuffix + ".svc.cluster.local answer auto"
}