-
Notifications
You must be signed in to change notification settings - Fork 473
/
coredns.go
102 lines (85 loc) · 4.15 KB
/
coredns.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
// Copyright (c) 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 botanist
import (
"context"
"time"
gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
gardencorev1beta1helper "github.com/gardener/gardener/pkg/apis/core/v1beta1/helper"
"github.com/gardener/gardener/pkg/controllerutils"
"github.com/gardener/gardener/pkg/operation/botanist/component/coredns"
"github.com/gardener/gardener/pkg/utils/images"
"github.com/gardener/gardener/pkg/utils/imagevector"
appsv1 "k8s.io/api/apps/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/utils/pointer"
"sigs.k8s.io/controller-runtime/pkg/client"
)
// DefaultCoreDNS returns a deployer for the CoreDNS.
func (b *Botanist) DefaultCoreDNS() (coredns.Interface, error) {
image, err := b.ImageVector.FindImage(images.ImageNameCoredns, imagevector.RuntimeVersion(b.ShootVersion()), imagevector.TargetVersion(b.ShootVersion()))
if err != nil {
return nil, err
}
values := coredns.Values{
// resolve conformance test issue (https://github.com/kubernetes/kubernetes/blob/master/test/e2e/network/dns.go#L44)
// before changing
ClusterDomain: gardencorev1beta1.DefaultDomain,
ClusterIP: b.Shoot.Networks.CoreDNS.String(),
Image: image.String(),
PodNetworkCIDR: b.Shoot.Networks.Pods.String(),
NodeNetworkCIDR: b.Shoot.GetInfo().Spec.Networking.Nodes,
AutoscalingMode: gardencorev1beta1.CoreDNSAutoscalingModeHorizontal,
}
if b.APIServerSNIEnabled() {
values.APIServerHost = pointer.String(b.outOfClusterAPIServerFQDN())
}
if gardencorev1beta1helper.IsCoreDNSAutoscalingModeUsed(b.Shoot.GetInfo().Spec.SystemComponents, gardencorev1beta1.CoreDNSAutoscalingModeClusterProportional) {
image, err = b.ImageVector.FindImage(images.ImageNameClusterProportionalAutoscaler, imagevector.RuntimeVersion(b.ShootVersion()), imagevector.TargetVersion(b.ShootVersion()))
if err != nil {
return nil, err
}
values.ClusterProportionalAutoscalerImage = image.String()
values.AutoscalingMode = gardencorev1beta1.CoreDNSAutoscalingModeClusterProportional
values.WantsVerticalPodAutoscaler = b.Shoot.WantsVerticalPodAutoscaler
}
return coredns.New(b.K8sSeedClient.Client(), b.Shoot.SeedNamespace, values), nil
}
// DeployCoreDNS deploys the CoreDNS system component.
func (b *Botanist) DeployCoreDNS(ctx context.Context) error {
restartedAtAnnotations, err := b.getCoreDNSRestartedAtAnnotations(ctx)
if err != nil {
return err
}
b.Shoot.Components.SystemComponents.CoreDNS.SetPodAnnotations(restartedAtAnnotations)
return b.Shoot.Components.SystemComponents.CoreDNS.Deploy(ctx)
}
// NowFunc is a function returning the current time.
// Exposed for testing.
var NowFunc = time.Now
func (b *Botanist) getCoreDNSRestartedAtAnnotations(ctx context.Context) (map[string]string, error) {
const key = "gardener.cloud/restarted-at"
if controllerutils.HasTask(b.Shoot.GetInfo().Annotations, v1beta1constants.ShootTaskRestartCoreAddons) {
return map[string]string{key: NowFunc().UTC().Format(time.RFC3339)}, nil
}
deployment := &appsv1.Deployment{ObjectMeta: metav1.ObjectMeta{Name: coredns.DeploymentName, Namespace: metav1.NamespaceSystem}}
if err := b.K8sShootClient.Client().Get(ctx, client.ObjectKeyFromObject(deployment), deployment); client.IgnoreNotFound(err) != nil {
return nil, err
}
if val, ok := deployment.Spec.Template.ObjectMeta.Annotations[key]; ok {
return map[string]string{key: val}, nil
}
return nil, nil
}