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nginxingress.go
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/
nginxingress.go
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// Copyright 2023 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"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
v1beta1helper "github.com/gardener/gardener/pkg/apis/core/v1beta1/helper"
extensionsv1alpha1helper "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1/helper"
"github.com/gardener/gardener/pkg/component"
extensionsdnsrecord "github.com/gardener/gardener/pkg/component/extensions/dnsrecord"
sharedcomponent "github.com/gardener/gardener/pkg/component/shared"
"github.com/gardener/gardener/pkg/controllerutils"
"github.com/gardener/gardener/pkg/utils"
)
// DefaultNginxIngress returns a deployer for the nginxingress.
func (b *Botanist) DefaultNginxIngress() (component.DeployWaiter, error) {
var (
configData map[string]string
loadBalancerSourceRanges []string
externalTrafficPolicy corev1.ServiceExternalTrafficPolicyType
)
if nginxIngressSpec := b.Shoot.GetInfo().Spec.Addons.NginxIngress; nginxIngressSpec != nil {
configData = getConfig(nginxIngressSpec.Config)
if nginxIngressSpec.LoadBalancerSourceRanges != nil {
loadBalancerSourceRanges = nginxIngressSpec.LoadBalancerSourceRanges
}
if nginxIngressSpec.ExternalTrafficPolicy != nil {
externalTrafficPolicy = *nginxIngressSpec.ExternalTrafficPolicy
}
}
return sharedcomponent.NewNginxIngress(
b.SeedClientSet.Client(),
b.Shoot.SeedNamespace,
metav1.NamespaceSystem,
b.Shoot.KubernetesVersion,
configData,
nil,
loadBalancerSourceRanges,
v1beta1constants.PriorityClassNameShootSystem600,
b.Shoot.PSPDisabled,
b.Shoot.WantsVerticalPodAutoscaler,
component.ClusterTypeShoot,
externalTrafficPolicy,
v1beta1constants.ShootNginxIngressClass,
)
}
// DeployNginxIngressAddon deploys the NginxIngress Addon component.
func (b *Botanist) DeployNginxIngressAddon(ctx context.Context) error {
if !v1beta1helper.NginxIngressEnabled(b.Shoot.GetInfo().Spec.Addons) {
return b.Shoot.Components.Addons.NginxIngress.Destroy(ctx)
}
return b.Shoot.Components.Addons.NginxIngress.Deploy(ctx)
}
func getConfig(config map[string]string) map[string]string {
var (
defaultConfig = map[string]string{
"server-name-hash-bucket-size": "256",
"use-proxy-protocol": "false",
"worker-processes": "2",
}
)
if config != nil {
return utils.MergeStringMaps(defaultConfig, config)
}
return defaultConfig
}
// NeedsIngressDNS returns true if the Shoot cluster needs ingress DNS.
func (b *Botanist) NeedsIngressDNS() bool {
return b.NeedsExternalDNS() && v1beta1helper.NginxIngressEnabled(b.Shoot.GetInfo().Spec.Addons)
}
// DefaultIngressDNSRecord creates the default deployer for the ingress DNSRecord resource.
func (b *Botanist) DefaultIngressDNSRecord() extensionsdnsrecord.Interface {
values := &extensionsdnsrecord.Values{
Name: b.Shoot.GetInfo().Name + "-ingress",
SecretName: DNSRecordSecretPrefix + "-" + b.Shoot.GetInfo().Name + "-" + v1beta1constants.DNSRecordExternalName,
Namespace: b.Shoot.SeedNamespace,
TTL: b.Config.Controllers.Shoot.DNSEntryTTLSeconds,
AnnotateOperation: controllerutils.HasTask(b.Shoot.GetInfo().Annotations, v1beta1constants.ShootTaskDeployDNSRecordIngress) || b.IsRestorePhase(),
}
// Set component values even if the nginx-ingress addons is not enabled.
if b.NeedsExternalDNS() {
values.Type = b.Shoot.ExternalDomain.Provider
if b.Shoot.ExternalDomain.Zone != "" {
values.Zone = &b.Shoot.ExternalDomain.Zone
}
values.SecretData = b.Shoot.ExternalDomain.SecretData
values.DNSName = b.Shoot.GetIngressFQDN("*")
}
return extensionsdnsrecord.New(
b.Logger,
b.SeedClientSet.Client(),
values,
extensionsdnsrecord.DefaultInterval,
extensionsdnsrecord.DefaultSevereThreshold,
extensionsdnsrecord.DefaultTimeout,
)
}
// DeployOrDestroyIngressDNSRecord deploys, restores, or destroys the ingress DNSRecord and waits for the operation to complete.
func (b *Botanist) DeployOrDestroyIngressDNSRecord(ctx context.Context) error {
if b.NeedsIngressDNS() {
return b.deployIngressDNSRecord(ctx)
}
return b.DestroyIngressDNSRecord(ctx)
}
// deployIngressDNSRecord deploys or restores the ingress DNSRecord and waits for the operation to complete.
func (b *Botanist) deployIngressDNSRecord(ctx context.Context) error {
if err := b.deployOrRestoreDNSRecord(ctx, b.Shoot.Components.Extensions.IngressDNSRecord); err != nil {
return err
}
return b.Shoot.Components.Extensions.IngressDNSRecord.Wait(ctx)
}
// DestroyIngressDNSRecord destroys the ingress DNSRecord and waits for the operation to complete.
func (b *Botanist) DestroyIngressDNSRecord(ctx context.Context) error {
if err := b.Shoot.Components.Extensions.IngressDNSRecord.Destroy(ctx); err != nil {
return err
}
return b.Shoot.Components.Extensions.IngressDNSRecord.WaitCleanup(ctx)
}
// MigrateIngressDNSRecord migrates the ingress DNSRecord and waits for the operation to complete.
func (b *Botanist) MigrateIngressDNSRecord(ctx context.Context) error {
if err := b.Shoot.Components.Extensions.IngressDNSRecord.Migrate(ctx); err != nil {
return err
}
return b.Shoot.Components.Extensions.IngressDNSRecord.WaitMigrate(ctx)
}
// SetNginxIngressAddress sets the IP address of the API server's LoadBalancer.
func (b *Botanist) SetNginxIngressAddress(address string) {
if b.NeedsIngressDNS() {
b.Shoot.Components.Extensions.IngressDNSRecord.SetRecordType(extensionsv1alpha1helper.GetDNSRecordType(address))
b.Shoot.Components.Extensions.IngressDNSRecord.SetValues([]string{address})
}
}