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logging.go
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logging.go
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// Copyright 2018 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"
"fmt"
"path/filepath"
corev1 "k8s.io/api/core/v1"
networkingv1 "k8s.io/api/networking/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
gardencore "github.com/gardener/gardener/pkg/apis/core"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
"github.com/gardener/gardener/pkg/client/kubernetes"
"github.com/gardener/gardener/pkg/component"
"github.com/gardener/gardener/pkg/component/logging/eventlogger"
"github.com/gardener/gardener/pkg/features"
gardenlethelper "github.com/gardener/gardener/pkg/gardenlet/apis/config/helper"
"github.com/gardener/gardener/pkg/operation/common"
gardenerutils "github.com/gardener/gardener/pkg/utils/gardener"
"github.com/gardener/gardener/pkg/utils/images"
"github.com/gardener/gardener/pkg/utils/imagevector"
kubernetesutils "github.com/gardener/gardener/pkg/utils/kubernetes"
"github.com/gardener/gardener/pkg/utils/secrets"
secretsmanager "github.com/gardener/gardener/pkg/utils/secrets/manager"
)
// DeploySeedLogging will install the Helm release "seed-bootstrap/charts/vali" in the Seed clusters.
func (b *Botanist) DeploySeedLogging(ctx context.Context) error {
if !b.Shoot.IsShootControlPlaneLoggingEnabled(b.Config) {
return b.destroyShootLoggingStack(ctx)
}
//TODO(rickardsjp, istvanballok): Remove in release v1.77 once the Loki to Vali migration is complete.
if exists, err := b.lokiPvcExists(ctx); err != nil {
return err
} else if exists {
if err := b.destroyLokiBasedShootLoggingStackRetainingPvc(ctx); err != nil {
return err
}
// If a Loki PVC exists, rename it to Vali.
if err := b.renameLokiPvcToVali(ctx); err != nil {
return err
}
}
seedImages, err := b.InjectSeedSeedImages(map[string]interface{}{},
images.ImageNameVali,
images.ImageNameValiCurator,
images.ImageNameKubeRbacProxy,
images.ImageNameTelegraf,
images.ImageNameTune2fs,
images.ImageNameAlpine,
)
if err != nil {
return err
}
if b.isShootEventLoggerEnabled() {
if err := b.Shoot.Components.Logging.ShootEventLogger.Deploy(ctx); err != nil {
return err
}
} else {
if err := b.Shoot.Components.Logging.ShootEventLogger.Destroy(ctx); err != nil {
return err
}
}
valiValues := map[string]interface{}{
"global": seedImages,
"replicas": b.Shoot.GetReplicas(1),
"clusterType": "shoot",
}
// check if vali is enabled in gardenlet config, default is true
if !gardenlethelper.IsValiEnabled(b.Config) {
// Because ShootNodeLogging is installed as part of the Vali pod
// we have to delete it too in case it was previously deployed
if err := b.destroyShootNodeLogging(ctx); err != nil {
return err
}
return common.DeleteVali(ctx, b.SeedClientSet.Client(), b.Shoot.SeedNamespace)
}
hvpaValues := make(map[string]interface{})
hvpaEnabled := features.DefaultFeatureGate.Enabled(features.HVPA)
if b.ManagedSeed != nil {
hvpaEnabled = features.DefaultFeatureGate.Enabled(features.HVPAForShootedSeed)
}
if b.isShootNodeLoggingEnabled() {
if err := b.Shoot.Components.Logging.ShootRBACProxy.Deploy(ctx); err != nil {
return err
}
genericTokenKubeconfigSecret, found := b.SecretsManager.Get(v1beta1constants.SecretNameGenericTokenKubeconfig)
if !found {
return fmt.Errorf("secret %q not found", v1beta1constants.SecretNameGenericTokenKubeconfig)
}
ingressClass, err := gardenerutils.ComputeNginxIngressClassForSeed(b.Seed.GetInfo(), b.Seed.GetInfo().Status.KubernetesVersion)
if err != nil {
return err
}
ingressTLSSecret, err := b.SecretsManager.Generate(ctx, &secrets.CertificateSecretConfig{
Name: "vali-tls",
CommonName: b.ComputeValiHost(),
Organization: []string{"gardener.cloud:monitoring:ingress"},
DNSNames: b.ComputeValiHosts(),
CertType: secrets.ServerCert,
Validity: &ingressTLSCertificateValidity,
SkipPublishingCACertificate: true,
}, secretsmanager.SignedByCA(v1beta1constants.SecretNameCACluster))
if err != nil {
return err
}
valiValues["rbacSidecarEnabled"] = true
valiValues["ingress"] = map[string]interface{}{
"class": ingressClass,
"hosts": []map[string]interface{}{
{
"hostName": b.ComputeValiHost(),
"secretName": ingressTLSSecret.Name,
"serviceName": "vali",
"servicePort": 8080,
"backendPath": "/vali/api/v1/push",
},
},
}
valiValues["genericTokenKubeconfigSecretName"] = genericTokenKubeconfigSecret.Name
} else {
if err := b.destroyShootNodeLogging(ctx); err != nil {
return err
}
}
hvpaValues["enabled"] = hvpaEnabled
valiValues["hvpa"] = hvpaValues
valiValues["priorityClassName"] = v1beta1constants.PriorityClassNameShootControlPlane100
if hvpaEnabled {
currentResources, err := kubernetesutils.GetContainerResourcesInStatefulSet(ctx, b.SeedClientSet.Client(), kubernetesutils.Key(b.Shoot.SeedNamespace, "vali"))
if err != nil {
return err
}
if len(currentResources) != 0 && currentResources["vali"] != nil {
valiValues["resources"] = map[string]interface{}{
// Copy requests only, effectively removing limits
"vali": &corev1.ResourceRequirements{Requests: currentResources["vali"].Requests},
}
}
}
return b.SeedClientSet.ChartApplier().Apply(ctx, filepath.Join(ChartsPath, "seed-bootstrap", "charts", "vali"), b.Shoot.SeedNamespace, fmt.Sprintf("%s-logging", b.Shoot.SeedNamespace), kubernetes.Values(valiValues))
}
func (b *Botanist) destroyShootLoggingStack(ctx context.Context) error {
if err := b.destroyShootNodeLogging(ctx); err != nil {
return err
}
if err := b.Shoot.Components.Logging.ShootEventLogger.Destroy(ctx); err != nil {
return err
}
return common.DeleteVali(ctx, b.SeedClientSet.Client(), b.Shoot.SeedNamespace)
}
func (b *Botanist) lokiPvcExists(ctx context.Context) (bool, error) {
return common.LokiPvcExists(ctx, b.SeedClientSet.Client(), b.Shoot.SeedNamespace, b.Logger)
}
func (b *Botanist) renameLokiPvcToVali(ctx context.Context) error {
if err := common.RenameLokiPvcToValiPvc(ctx, b.SeedClientSet.Client(), b.Shoot.SeedNamespace, b.Logger); err != nil {
return err
}
return nil
}
func (b *Botanist) destroyLokiBasedShootLoggingStackRetainingPvc(ctx context.Context) error {
if err := b.destroyLokiBasedShootNodeLogging(ctx); err != nil {
return err
}
// The EventLogger is not dependent on Loki/Vali and therefore doesn't need to be deleted.
// if err := b.Shoot.Components.Logging.ShootEventLogger.Destroy(ctx); err != nil {
// return err
// }
return common.DeleteLokiRetainPvc(ctx, b.SeedClientSet.Client(), b.Shoot.SeedNamespace, b.Logger)
}
func (b *Botanist) destroyShootNodeLogging(ctx context.Context) error {
if err := b.Shoot.Components.Logging.ShootRBACProxy.Destroy(ctx); err != nil {
return err
}
return kubernetesutils.DeleteObjects(ctx, b.SeedClientSet.Client(),
&networkingv1.Ingress{ObjectMeta: metav1.ObjectMeta{Name: "vali", Namespace: b.Shoot.SeedNamespace}},
&corev1.ConfigMap{ObjectMeta: metav1.ObjectMeta{Name: "telegraf-config", Namespace: b.Shoot.SeedNamespace}},
)
}
func (b *Botanist) destroyLokiBasedShootNodeLogging(ctx context.Context) error {
if err := b.Shoot.Components.Logging.ShootRBACProxy.Destroy(ctx); err != nil {
return err
}
return kubernetesutils.DeleteObjects(ctx, b.SeedClientSet.Client(),
&networkingv1.Ingress{ObjectMeta: metav1.ObjectMeta{Name: "loki", Namespace: b.Shoot.SeedNamespace}},
&networkingv1.NetworkPolicy{ObjectMeta: metav1.ObjectMeta{Name: "allow-from-prometheus-to-loki-telegraf", Namespace: b.Shoot.SeedNamespace}},
&corev1.ConfigMap{ObjectMeta: metav1.ObjectMeta{Name: "telegraf-config", Namespace: b.Shoot.SeedNamespace}},
)
}
func (b *Botanist) isShootNodeLoggingEnabled() bool {
if b.Shoot != nil && !b.Shoot.IsWorkerless && b.Shoot.IsShootControlPlaneLoggingEnabled(b.Config) &&
gardenlethelper.IsValiEnabled(b.Config) && b.Config != nil &&
b.Config.Logging != nil && b.Config.Logging.ShootNodeLogging != nil {
for _, purpose := range b.Config.Logging.ShootNodeLogging.ShootPurposes {
if gardencore.ShootPurpose(b.Shoot.Purpose) == purpose {
return true
}
}
}
return false
}
func (b *Botanist) isShootEventLoggerEnabled() bool {
return b.Shoot != nil && b.Shoot.IsShootControlPlaneLoggingEnabled(b.Config) && gardenlethelper.IsEventLoggingEnabled(b.Config)
}
// DefaultEventLogger returns a deployer for the shoot-event-logger.
func (b *Botanist) DefaultEventLogger() (component.Deployer, error) {
imageEventLogger, err := b.ImageVector.FindImage(images.ImageNameEventLogger, imagevector.RuntimeVersion(b.SeedVersion()), imagevector.TargetVersion(b.ShootVersion()))
if err != nil {
return nil, err
}
return eventlogger.New(
b.SeedClientSet.Client(),
b.Shoot.SeedNamespace,
b.SecretsManager,
eventlogger.Values{
Image: imageEventLogger.String(),
Replicas: b.Shoot.GetReplicas(1),
})
}