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resource_manager.go
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resource_manager.go
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// 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 resourcemanager
import (
"context"
_ "embed"
"fmt"
"time"
"github.com/Masterminds/semver"
druidv1alpha1 "github.com/gardener/etcd-druid/api/v1alpha1"
hvpav1alpha1 "github.com/gardener/hvpa-controller/api/v1alpha1"
admissionv1 "k8s.io/api/admission/v1"
admissionv1beta1 "k8s.io/api/admission/v1beta1"
admissionregistrationv1 "k8s.io/api/admissionregistration/v1"
appsv1 "k8s.io/api/apps/v1"
autoscalingv1 "k8s.io/api/autoscaling/v1"
autoscalingv2 "k8s.io/api/autoscaling/v2"
autoscalingv2beta1 "k8s.io/api/autoscaling/v2beta1"
corev1 "k8s.io/api/core/v1"
discoveryv1 "k8s.io/api/discovery/v1"
networkingv1 "k8s.io/api/networking/v1"
policyv1 "k8s.io/api/policy/v1"
policyv1beta1 "k8s.io/api/policy/v1beta1"
rbacv1 "k8s.io/api/rbac/v1"
apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
apiextensionsv1beta1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/runtime/serializer"
"k8s.io/apimachinery/pkg/runtime/serializer/json"
"k8s.io/apimachinery/pkg/util/intstr"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
vpaautoscalingv1 "k8s.io/autoscaler/vertical-pod-autoscaler/pkg/apis/autoscaling.k8s.io/v1"
componentbaseconfigv1alpha1 "k8s.io/component-base/config/v1alpha1"
"k8s.io/utils/pointer"
"sigs.k8s.io/controller-runtime/pkg/client"
gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
resourcesv1alpha1 "github.com/gardener/gardener/pkg/apis/resources/v1alpha1"
"github.com/gardener/gardener/pkg/client/kubernetes"
"github.com/gardener/gardener/pkg/controllerutils"
"github.com/gardener/gardener/pkg/operation/botanist/component"
kubeapiserverconstants "github.com/gardener/gardener/pkg/operation/botanist/component/kubeapiserver/constants"
"github.com/gardener/gardener/pkg/operation/botanist/component/kubescheduler"
resourcemanagerconstants "github.com/gardener/gardener/pkg/operation/botanist/component/resourcemanager/constants"
resourcemanagerv1alpha1 "github.com/gardener/gardener/pkg/resourcemanager/apis/config/v1alpha1"
"github.com/gardener/gardener/pkg/resourcemanager/controller/garbagecollector/references"
"github.com/gardener/gardener/pkg/resourcemanager/webhook/crddeletionprotection"
"github.com/gardener/gardener/pkg/resourcemanager/webhook/endpointslicehints"
"github.com/gardener/gardener/pkg/resourcemanager/webhook/extensionvalidation"
"github.com/gardener/gardener/pkg/resourcemanager/webhook/highavailabilityconfig"
"github.com/gardener/gardener/pkg/resourcemanager/webhook/podschedulername"
"github.com/gardener/gardener/pkg/resourcemanager/webhook/podtopologyspreadconstraints"
"github.com/gardener/gardener/pkg/resourcemanager/webhook/projectedtokenmount"
"github.com/gardener/gardener/pkg/resourcemanager/webhook/seccompprofile"
"github.com/gardener/gardener/pkg/resourcemanager/webhook/systemcomponentsconfig"
"github.com/gardener/gardener/pkg/resourcemanager/webhook/tokeninvalidator"
"github.com/gardener/gardener/pkg/utils"
"github.com/gardener/gardener/pkg/utils/flow"
gardenerutils "github.com/gardener/gardener/pkg/utils/gardener"
kubernetesutils "github.com/gardener/gardener/pkg/utils/kubernetes"
"github.com/gardener/gardener/pkg/utils/kubernetes/health"
"github.com/gardener/gardener/pkg/utils/managedresources"
"github.com/gardener/gardener/pkg/utils/retry"
"github.com/gardener/gardener/pkg/utils/secrets"
secretsmanager "github.com/gardener/gardener/pkg/utils/secrets/manager"
"github.com/gardener/gardener/pkg/utils/version"
)
var (
scheme *runtime.Scheme
codec runtime.Codec
//go:embed assets/crd-resources.gardener.cloud_managedresources.yaml
// CRD is the custom resource definition for ManagedResources.
CRD string
// SkipWebhookDeployment is a variable which controls whether the webhook deployment should be skipped.
// Exposed for testing.
SkipWebhookDeployment bool
)
func init() {
scheme = runtime.NewScheme()
utilruntime.Must(resourcemanagerv1alpha1.AddToScheme(scheme))
utilruntime.Must(apiextensionsv1.AddToScheme(scheme))
var (
ser = json.NewSerializerWithOptions(json.DefaultMetaFactory, scheme, scheme, json.SerializerOptions{
Yaml: true,
Pretty: false,
Strict: false,
})
versions = schema.GroupVersions([]schema.GroupVersion{
resourcemanagerv1alpha1.SchemeGroupVersion,
apiextensionsv1.SchemeGroupVersion,
})
)
codec = serializer.NewCodecFactory(scheme).CodecForVersions(ser, ser, versions, versions)
}
const (
// ManagedResourceName is the name for the ManagedResource containing resources deployed to the shoot cluster.
ManagedResourceName = "shoot-core-gardener-resource-manager"
// SecretNameShootAccess is the name of the shoot access secret for the gardener-resource-manager.
SecretNameShootAccess = gardenerutils.SecretNamePrefixShootAccess + v1beta1constants.DeploymentNameGardenerResourceManager
// LabelValue is a constant for the value of the 'app' label on Kubernetes resources.
LabelValue = "gardener-resource-manager"
// labelChecksum is a constant for the label key which holds the checksum of the pod template.
labelChecksum = "checksum/pod-template"
configMapNamePrefix = "gardener-resource-manager"
secretNameServer = "gardener-resource-manager-server"
clusterRoleName = "gardener-resource-manager-seed"
roleName = "gardener-resource-manager"
serviceAccountName = "gardener-resource-manager"
metricsPortName = "metrics"
containerName = v1beta1constants.DeploymentNameGardenerResourceManager
healthPort = 8081
metricsPort = 8080
serverServicePort = 443
configMapDataKey = "config.yaml"
volumeNameBootstrapKubeconfig = "kubeconfig-bootstrap"
volumeNameCerts = "tls"
volumeNameAPIServerAccess = "kube-api-access-gardener"
volumeNameRootCA = "root-ca"
volumeNameConfiguration = "config"
volumeMountPathCerts = "/etc/gardener-resource-manager-tls"
volumeMountPathAPIServerAccess = "/var/run/secrets/kubernetes.io/serviceaccount"
volumeMountPathRootCA = "/etc/gardener-resource-manager-root-ca"
volumeMountPathConfiguration = "/etc/gardener-resource-manager-config"
)
var (
allowAll = []rbacv1.PolicyRule{{
APIGroups: []string{"*"},
Resources: []string{"*"},
Verbs: []string{"*"},
}}
allowManagedResources = []rbacv1.PolicyRule{
{
APIGroups: []string{"resources.gardener.cloud"},
Resources: []string{"managedresources", "managedresources/status"},
Verbs: []string{"get", "list", "watch", "update", "patch"},
},
{
APIGroups: []string{""},
Resources: []string{"secrets"},
Verbs: []string{"get", "list", "watch", "update", "patch"},
},
{
APIGroups: []string{""},
Resources: []string{"configmaps", "events"},
Verbs: []string{"create"},
},
{
APIGroups: []string{""},
Resources: []string{"configmaps"},
ResourceNames: []string{"gardener-resource-manager"},
Verbs: []string{"get", "watch", "update", "patch"},
},
{
APIGroups: []string{"coordination.k8s.io"},
Resources: []string{"leases"},
Verbs: []string{"create"},
},
{
APIGroups: []string{"coordination.k8s.io"},
Resources: []string{"leases"},
ResourceNames: []string{"gardener-resource-manager"},
Verbs: []string{"get", "watch", "update"},
},
}
allowMachines = []rbacv1.PolicyRule{
{
APIGroups: []string{"machine.sapcloud.io"},
Resources: []string{"machines"},
Verbs: []string{"get", "list", "watch"},
},
}
)
// Interface contains functions for a gardener-resource-manager deployer.
type Interface interface {
component.DeployWaiter
component.MonitoringComponent
// GetReplicas gets the Replicas field in the Values.
GetReplicas() *int32
// SetReplicas sets the Replicas field in the Values.
SetReplicas(*int32)
// SetSecrets sets the secrets.
SetSecrets(Secrets)
// GetValues returns the current configuration values of the deployer.
GetValues() Values
}
// New creates a new instance of the gardener-resource-manager.
func New(
client client.Client,
namespace string,
secretsManager secretsmanager.Interface,
values Values,
) Interface {
return &resourceManager{
client: client,
namespace: namespace,
secretsManager: secretsManager,
values: values,
}
}
type resourceManager struct {
client client.Client
namespace string
secretsManager secretsmanager.Interface
values Values
secrets Secrets
}
// Values holds the optional configuration options for the gardener resource manager
type Values struct {
// AlwaysUpdate if set to false then a resource will only be updated if its desired state differs from the actual state. otherwise, an update request will be always sent
AlwaysUpdate *bool
// ClusterIdentity is the identity of the managing cluster.
ClusterIdentity *string
// ConcurrentSyncs are the number of worker threads for concurrent reconciliation of resources
ConcurrentSyncs *int
// HealthSyncPeriod describes the duration of how often the health of existing resources should be synced
HealthSyncPeriod *metav1.Duration
// FullNetworkPolicies makes the network policy controller to consider all relevant namespaces.
FullNetworkPolicies bool
// NetworkPolicyControllerIncludesGardenNamespace describes whether the 'garden' namespace should be targeted by the
// network policy controller.
NetworkPolicyControllerIncludesGardenNamespace bool
// NetworkPolicyControllerIngressControllerSelector is the peer information of the ingress controller for the
// network policy controller.
NetworkPolicyControllerIngressControllerSelector *resourcemanagerv1alpha1.IngressControllerSelector
// Image is the container image.
Image string
// LogLevel is the level/severity for the logs. Must be one of [info,debug,error].
LogLevel string
// LogFormat is the output format for the logs. Must be one of [text,json].
LogFormat string
// MaxConcurrentHealthWorkers configures the number of worker threads for concurrent health reconciliation of resources
MaxConcurrentHealthWorkers *int
// MaxConcurrentTokenInvalidatorWorkers configures the number of worker threads for concurrent token invalidator reconciliations
MaxConcurrentTokenInvalidatorWorkers *int
// MaxConcurrentTokenRequestorWorkers configures the number of worker threads for concurrent token requestor reconciliations
MaxConcurrentTokenRequestorWorkers *int
// MaxConcurrentCSRApproverWorkers configures the number of worker threads for concurrent kubelet CSR approver reconciliations
MaxConcurrentCSRApproverWorkers *int
// PriorityClassName is the name of the priority class.
PriorityClassName string
// Replicas is the number of replicas for the gardener-resource-manager deployment.
Replicas *int32
// ResourceClass is used to filter resource resources
ResourceClass *string
// SecretNameServerCA is the name of the server CA secret.
SecretNameServerCA string
// SyncPeriod configures the duration of how often existing resources should be synced
SyncPeriod *metav1.Duration
// SystemComponentTolerations are the tolerations required for shoot system components.
SystemComponentTolerations []corev1.Toleration
// TargetDiffersFromSourceCluster states whether the target cluster is a different one than the source cluster
TargetDiffersFromSourceCluster bool
// TargetDisableCache disables the cache for target cluster and always talk directly to the API server (defaults to false)
TargetDisableCache *bool
// WatchedNamespace restricts the gardener-resource-manager to only watch ManagedResources in the defined namespace.
// If not set the gardener-resource-manager controller watches for ManagedResources in all namespaces
WatchedNamespace *string
// KubernetesVersion is the Kubernetes version for the Kubernetes components.
KubernetesVersion *semver.Version
// VPA contains information for configuring VerticalPodAutoscaler settings for the gardener-resource-manager deployment.
VPA *VPAConfig
// SchedulingProfile is the kube-scheduler profile configured for the Shoot.
SchedulingProfile *gardencorev1beta1.SchedulingProfile
// DefaultSeccompProfileEnabled specifies if the defaulting seccomp profile webhook of GRM should be enabled or not.
DefaultSeccompProfileEnabled bool
// EndpointSliceHintsEnabled specifies if the EndpointSlice hints webhook of GRM should be enabled or not.
EndpointSliceHintsEnabled bool
// PodTopologySpreadConstraintsEnabled specifies if the pod's TSC should be mutated to support rolling updates.
PodTopologySpreadConstraintsEnabled bool
// FailureToleranceType determines the failure tolerance type for the resource manager deployment.
FailureToleranceType *gardencorev1beta1.FailureToleranceType
// Zones is number of availability zones.
Zones []string
// TopologyAwareRoutingEnabled indicates whether topology-aware routing is enabled for the gardener-resource-manager service.
// This value is only applicable for the GRM that is deployed in the Shoot control plane (when TargetDiffersFromSourceCluster=true).
TopologyAwareRoutingEnabled bool
}
// VPAConfig contains information for configuring VerticalPodAutoscaler settings for the gardener-resource-manager deployment.
type VPAConfig struct {
// MinAllowed specifies the minimal amount of resources that will be recommended
// for the container.
MinAllowed corev1.ResourceList
}
func (r *resourceManager) Deploy(ctx context.Context) error {
if r.values.TargetDiffersFromSourceCluster {
r.secrets.shootAccess = r.newShootAccessSecret()
if err := r.secrets.shootAccess.WithTokenExpirationDuration("24h").Reconcile(ctx, r.client); err != nil {
return err
}
} else {
if err := r.ensureCustomResourceDefinition(ctx); err != nil {
return err
}
}
configMap := r.emptyConfigMap()
fns := []flow.TaskFn{
r.ensureServiceAccount,
func(ctx context.Context) error { return r.ensureConfigMap(ctx, configMap) },
r.ensureRBAC,
r.ensureService,
func(ctx context.Context) error { return r.ensureDeployment(ctx, configMap) },
r.ensurePodDisruptionBudget,
r.ensureVPA,
}
if r.values.TargetDiffersFromSourceCluster {
fns = append(fns, r.ensureShootResources)
// TODO(rfranzke): Remove this in a future version.
fns = append(fns, func(ctx context.Context) error {
return kubernetesutils.DeleteObject(ctx, r.client, &networkingv1.NetworkPolicy{ObjectMeta: metav1.ObjectMeta{Name: "allow-kube-apiserver-to-gardener-resource-manager", Namespace: r.namespace}})
})
} else {
fns = append(fns, r.ensureMutatingWebhookConfiguration)
fns = append(fns, r.ensureValidatingWebhookConfiguration)
}
if err := flow.Sequential(fns...)(ctx); err != nil {
return err
}
return nil
}
func (r *resourceManager) Destroy(ctx context.Context) error {
objectsToDelete := []client.Object{
r.emptyPodDisruptionBudget(),
r.emptyVPA(),
r.emptyDeployment(),
r.emptyService(),
r.emptyServiceAccount(),
}
if r.values.TargetDiffersFromSourceCluster {
if err := managedresources.DeleteForShoot(ctx, r.client, r.namespace, ManagedResourceName); err != nil {
return err
}
timeoutCtx, cancel := context.WithTimeout(ctx, 2*time.Minute)
defer cancel()
if err := managedresources.WaitUntilDeleted(timeoutCtx, r.client, r.namespace, ManagedResourceName); err != nil {
return err
}
objectsToDelete = append(objectsToDelete,
r.newShootAccessSecret().Secret,
r.emptyRoleInWatchedNamespace(),
r.emptyRoleBindingInWatchedNamespace(),
)
} else {
crd, err := r.emptyCustomResourceDefinition()
if err != nil {
return err
}
if err := gardenerutils.ConfirmDeletion(ctx, r.client, crd); client.IgnoreNotFound(err) != nil {
return err
}
objectsToDelete = append([]client.Object{
&apiextensionsv1.CustomResourceDefinition{ObjectMeta: metav1.ObjectMeta{Name: crd.Name}},
r.emptyMutatingWebhookConfiguration(),
r.emptyValidatingWebhookConfiguration(),
r.emptyClusterRole(),
r.emptyClusterRoleBinding(),
// TODO(rfranzke): Remove this in a future version.
&networkingv1.NetworkPolicy{ObjectMeta: metav1.ObjectMeta{Name: "allow-kube-apiserver-to-gardener-resource-manager", Namespace: r.namespace}},
}, objectsToDelete...)
}
return kubernetesutils.DeleteObjects(ctx, r.client, objectsToDelete...)
}
func (r *resourceManager) emptyCustomResourceDefinition() (*apiextensionsv1.CustomResourceDefinition, error) {
obj, err := runtime.Decode(codec, []byte(CRD))
if err != nil {
return nil, err
}
crd, ok := obj.(*apiextensionsv1.CustomResourceDefinition)
if !ok {
return nil, fmt.Errorf("expected *apiextensionsv1.CustomResourceDefinition but got %T", obj)
}
return crd, nil
}
func (r *resourceManager) ensureCustomResourceDefinition(ctx context.Context) error {
desiredCRD, err := r.emptyCustomResourceDefinition()
if err != nil {
return err
}
crd := &apiextensionsv1.CustomResourceDefinition{ObjectMeta: metav1.ObjectMeta{Name: desiredCRD.Name}}
_, err = controllerutils.GetAndCreateOrMergePatch(ctx, r.client, crd, func() error {
crd.Annotations = utils.MergeStringMaps(crd.Annotations, desiredCRD.Annotations)
crd.Labels = utils.MergeStringMaps(crd.Labels, desiredCRD.Labels)
crd.Spec = desiredCRD.Spec
return nil
})
return err
}
func (r *resourceManager) ensureRBAC(ctx context.Context) error {
if r.values.TargetDiffersFromSourceCluster {
if r.values.WatchedNamespace == nil {
if err := r.ensureClusterRole(ctx, allowManagedResources); err != nil {
return err
}
if err := r.ensureClusterRoleBinding(ctx); err != nil {
return err
}
} else {
if err := r.ensureRoleInWatchedNamespace(ctx, append(allowManagedResources, allowMachines...)...); err != nil {
return err
}
if err := r.ensureRoleBinding(ctx); err != nil {
return err
}
}
} else {
if err := r.ensureClusterRole(ctx, allowAll); err != nil {
return err
}
if err := r.ensureClusterRoleBinding(ctx); err != nil {
return err
}
}
return nil
}
func (r *resourceManager) ensureClusterRole(ctx context.Context, policies []rbacv1.PolicyRule) error {
clusterRole := r.emptyClusterRole()
_, err := controllerutils.GetAndCreateOrMergePatch(ctx, r.client, clusterRole, func() error {
clusterRole.Labels = r.getLabels()
clusterRole.Rules = policies
return nil
})
return err
}
func (r *resourceManager) emptyClusterRole() *rbacv1.ClusterRole {
return &rbacv1.ClusterRole{ObjectMeta: metav1.ObjectMeta{Name: clusterRoleName}}
}
func (r *resourceManager) ensureClusterRoleBinding(ctx context.Context) error {
clusterRoleBinding := r.emptyClusterRoleBinding()
_, err := controllerutils.GetAndCreateOrMergePatch(ctx, r.client, clusterRoleBinding, func() error {
clusterRoleBinding.Labels = r.getLabels()
clusterRoleBinding.RoleRef = rbacv1.RoleRef{
APIGroup: rbacv1.GroupName,
Kind: "ClusterRole",
Name: clusterRoleName,
}
clusterRoleBinding.Subjects = []rbacv1.Subject{{
Kind: rbacv1.ServiceAccountKind,
Name: serviceAccountName,
Namespace: r.namespace,
}}
return nil
})
return err
}
func (r *resourceManager) emptyClusterRoleBinding() *rbacv1.ClusterRoleBinding {
return &rbacv1.ClusterRoleBinding{ObjectMeta: metav1.ObjectMeta{Name: clusterRoleName}}
}
func (r *resourceManager) ensureConfigMap(ctx context.Context, configMap *corev1.ConfigMap) error {
config := &resourcemanagerv1alpha1.ResourceManagerConfiguration{
SourceClientConnection: resourcemanagerv1alpha1.SourceClientConnection{
Namespace: r.values.WatchedNamespace,
},
LeaderElection: componentbaseconfigv1alpha1.LeaderElectionConfiguration{
LeaderElect: pointer.Bool(true),
ResourceNamespace: r.namespace,
},
Server: resourcemanagerv1alpha1.ServerConfiguration{
HealthProbes: &resourcemanagerv1alpha1.Server{
Port: healthPort,
},
Metrics: &resourcemanagerv1alpha1.Server{
Port: metricsPort,
},
Webhooks: resourcemanagerv1alpha1.HTTPSServer{
Server: resourcemanagerv1alpha1.Server{
Port: resourcemanagerconstants.ServerPort,
},
TLS: resourcemanagerv1alpha1.TLSServer{
ServerCertDir: volumeMountPathCerts,
},
},
},
LogLevel: r.values.LogLevel,
LogFormat: r.values.LogFormat,
Controllers: resourcemanagerv1alpha1.ResourceManagerControllerConfiguration{
ClusterID: r.values.ClusterIdentity,
ResourceClass: r.values.ResourceClass,
GarbageCollector: resourcemanagerv1alpha1.GarbageCollectorControllerConfig{
Enabled: true,
SyncPeriod: &metav1.Duration{Duration: 12 * time.Hour},
},
Health: resourcemanagerv1alpha1.HealthControllerConfig{
ConcurrentSyncs: r.values.MaxConcurrentHealthWorkers,
SyncPeriod: r.values.HealthSyncPeriod,
},
ManagedResource: resourcemanagerv1alpha1.ManagedResourceControllerConfig{
ConcurrentSyncs: r.values.ConcurrentSyncs,
SyncPeriod: r.values.SyncPeriod,
AlwaysUpdate: r.values.AlwaysUpdate,
},
},
Webhooks: resourcemanagerv1alpha1.ResourceManagerWebhookConfiguration{
EndpointSliceHints: resourcemanagerv1alpha1.EndpointSliceHintsWebhookConfig{
Enabled: r.values.EndpointSliceHintsEnabled,
},
HighAvailabilityConfig: resourcemanagerv1alpha1.HighAvailabilityConfigWebhookConfig{
Enabled: true,
},
PodTopologySpreadConstraints: resourcemanagerv1alpha1.PodTopologySpreadConstraintsWebhookConfig{
Enabled: r.values.PodTopologySpreadConstraintsEnabled,
},
ProjectedTokenMount: resourcemanagerv1alpha1.ProjectedTokenMountWebhookConfig{
Enabled: true,
},
SeccompProfile: resourcemanagerv1alpha1.SeccompProfileWebhookConfig{
Enabled: r.values.DefaultSeccompProfileEnabled,
},
},
}
if r.values.TargetDiffersFromSourceCluster {
config.TargetClientConnection = &resourcemanagerv1alpha1.TargetClientConnection{
ClientConnectionConfiguration: componentbaseconfigv1alpha1.ClientConnectionConfiguration{
Kubeconfig: gardenerutils.PathGenericKubeconfig,
},
DisableCachedClient: r.values.TargetDisableCache,
}
} else {
config.Controllers.NetworkPolicy = resourcemanagerv1alpha1.NetworkPolicyControllerConfig{
Enabled: true,
NamespaceSelectors: []metav1.LabelSelector{
{MatchLabels: map[string]string{v1beta1constants.GardenRole: v1beta1constants.GardenRoleShoot}},
{MatchLabels: map[string]string{v1beta1constants.GardenRole: v1beta1constants.GardenRoleIstioSystem}},
{MatchLabels: map[string]string{v1beta1constants.GardenRole: v1beta1constants.GardenRoleIstioIngress}},
{MatchExpressions: []metav1.LabelSelectorRequirement{{Key: v1beta1constants.LabelExposureClassHandlerName, Operator: metav1.LabelSelectorOpExists}}},
},
IngressControllerSelector: r.values.NetworkPolicyControllerIngressControllerSelector,
}
config.Webhooks.CRDDeletionProtection.Enabled = true
config.Webhooks.ExtensionValidation.Enabled = true
if r.values.FullNetworkPolicies {
config.Controllers.NetworkPolicy.NamespaceSelectors = append(config.Controllers.NetworkPolicy.NamespaceSelectors,
metav1.LabelSelector{MatchLabels: map[string]string{v1beta1constants.GardenRole: v1beta1constants.GardenRoleExtension}},
)
}
if r.values.NetworkPolicyControllerIncludesGardenNamespace {
config.Controllers.NetworkPolicy.NamespaceSelectors = append(config.Controllers.NetworkPolicy.NamespaceSelectors,
metav1.LabelSelector{MatchLabels: map[string]string{corev1.LabelMetadataName: v1beta1constants.GardenNamespace}},
)
}
}
if v := r.values.MaxConcurrentCSRApproverWorkers; v != nil {
config.Controllers.KubeletCSRApprover.Enabled = true
config.Controllers.KubeletCSRApprover.ConcurrentSyncs = v
}
if v := r.values.MaxConcurrentTokenRequestorWorkers; v != nil {
config.Controllers.TokenRequestor.Enabled = true
config.Controllers.TokenRequestor.ConcurrentSyncs = v
}
if v := r.values.MaxConcurrentTokenInvalidatorWorkers; v != nil {
config.Webhooks.TokenInvalidator.Enabled = true
config.Controllers.TokenInvalidator.Enabled = true
config.Controllers.TokenInvalidator.ConcurrentSyncs = v
}
if r.values.SchedulingProfile != nil && *r.values.SchedulingProfile != gardencorev1beta1.SchedulingProfileBalanced {
config.Webhooks.PodSchedulerName.Enabled = true
config.Webhooks.PodSchedulerName.SchedulerName = pointer.String(kubescheduler.BinPackingSchedulerName)
}
if r.values.TargetDiffersFromSourceCluster {
config.Webhooks.SystemComponentsConfig = resourcemanagerv1alpha1.SystemComponentsConfigWebhookConfig{
Enabled: true,
NodeSelector: map[string]string{
v1beta1constants.LabelWorkerPoolSystemComponents: "true",
},
PodNodeSelector: map[string]string{
v1beta1constants.LabelWorkerPoolSystemComponents: "true",
},
PodTolerations: r.values.SystemComponentTolerations,
}
}
if r.values.TargetDiffersFromSourceCluster {
config.Controllers.Node.Enabled = true
}
data, err := runtime.Encode(codec, config)
if err != nil {
return err
}
configMap.Data = map[string]string{configMapDataKey: string(data)}
utilruntime.Must(kubernetesutils.MakeUnique(configMap))
return client.IgnoreAlreadyExists(r.client.Create(ctx, configMap))
}
func (r *resourceManager) emptyConfigMap() *corev1.ConfigMap {
return &corev1.ConfigMap{ObjectMeta: metav1.ObjectMeta{Name: configMapNamePrefix, Namespace: r.namespace}}
}
func (r *resourceManager) ensureRoleInWatchedNamespace(ctx context.Context, policies ...rbacv1.PolicyRule) error {
role := r.emptyRoleInWatchedNamespace()
_, err := controllerutils.GetAndCreateOrMergePatch(ctx, r.client, role, func() error {
role.Labels = r.getLabels()
role.Rules = policies
return nil
})
return err
}
func (r *resourceManager) emptyRoleInWatchedNamespace() *rbacv1.Role {
return &rbacv1.Role{ObjectMeta: metav1.ObjectMeta{Name: roleName, Namespace: *r.values.WatchedNamespace}}
}
func (r *resourceManager) ensureRoleBinding(ctx context.Context) error {
roleBinding := r.emptyRoleBindingInWatchedNamespace()
_, err := controllerutils.GetAndCreateOrMergePatch(ctx, r.client, roleBinding, func() error {
roleBinding.Labels = r.getLabels()
roleBinding.RoleRef = rbacv1.RoleRef{
APIGroup: rbacv1.GroupName,
Kind: "Role",
Name: roleName,
}
roleBinding.Subjects = []rbacv1.Subject{{
Kind: rbacv1.ServiceAccountKind,
Name: serviceAccountName,
Namespace: r.namespace,
}}
return nil
})
return err
}
func (r *resourceManager) emptyRoleBindingInWatchedNamespace() *rbacv1.RoleBinding {
return &rbacv1.RoleBinding{ObjectMeta: metav1.ObjectMeta{Name: "gardener-resource-manager", Namespace: *r.values.WatchedNamespace}}
}
func (r *resourceManager) ensureService(ctx context.Context) error {
const (
healthPortName = "health"
serverPortName = "server"
)
service := r.emptyService()
_, err := controllerutils.GetAndCreateOrMergePatch(ctx, r.client, service, func() error {
service.Labels = utils.MergeStringMaps(service.Labels, r.getLabels())
portMetrics := networkingv1.NetworkPolicyPort{
Port: utils.IntStrPtrFromInt(metricsPort),
Protocol: utils.ProtocolPtr(corev1.ProtocolTCP),
}
if !r.values.TargetDiffersFromSourceCluster {
utilruntime.Must(gardenerutils.InjectNetworkPolicyAnnotationsForSeedScrapeTargets(service, portMetrics))
metav1.SetMetaDataAnnotation(&service.ObjectMeta, resourcesv1alpha1.NetworkingFromWorldToPorts, fmt.Sprintf(`[{"protocol":"TCP","port":%d}]`, resourcemanagerconstants.ServerPort))
} else {
utilruntime.Must(gardenerutils.InjectNetworkPolicyAnnotationsForScrapeTargets(service, portMetrics))
}
topologyAwareRoutingEnabled := r.values.TopologyAwareRoutingEnabled && r.values.TargetDiffersFromSourceCluster
gardenerutils.ReconcileTopologyAwareRoutingMetadata(service, topologyAwareRoutingEnabled)
service.Spec.Selector = appLabel()
service.Spec.Type = corev1.ServiceTypeClusterIP
desiredPorts := []corev1.ServicePort{
{
Name: metricsPortName,
Protocol: corev1.ProtocolTCP,
Port: metricsPort,
},
{
Name: healthPortName,
Protocol: corev1.ProtocolTCP,
Port: healthPort,
},
{
Name: serverPortName,
Protocol: corev1.ProtocolTCP,
Port: serverServicePort,
TargetPort: intstr.FromInt(resourcemanagerconstants.ServerPort),
},
}
service.Spec.Ports = kubernetesutils.ReconcileServicePorts(service.Spec.Ports, desiredPorts, corev1.ServiceTypeClusterIP)
return nil
})
return err
}
func (r *resourceManager) emptyService() *corev1.Service {
return &corev1.Service{ObjectMeta: metav1.ObjectMeta{Name: resourcemanagerconstants.ServiceName, Namespace: r.namespace}}
}
func (r *resourceManager) ensureDeployment(ctx context.Context, configMap *corev1.ConfigMap) error {
deployment := r.emptyDeployment()
secretServer, err := r.secretsManager.Generate(ctx, &secrets.CertificateSecretConfig{
Name: secretNameServer,
CommonName: v1beta1constants.DeploymentNameGardenerResourceManager,
DNSNames: kubernetesutils.DNSNamesForService(resourcemanagerconstants.ServiceName, r.namespace),
CertType: secrets.ServerCert,
SkipPublishingCACertificate: true,
}, secretsmanager.SignedByCA(r.values.SecretNameServerCA, secretsmanager.UseCurrentCA), secretsmanager.Rotate(secretsmanager.InPlace))
if err != nil {
return err
}
_, err = controllerutils.GetAndCreateOrMergePatch(ctx, r.client, deployment, func() error {
deployment.Labels = r.getLabels()
deployment.Spec.Replicas = r.values.Replicas
deployment.Spec.RevisionHistoryLimit = pointer.Int32(2)
deployment.Spec.Selector = &metav1.LabelSelector{MatchLabels: appLabel()}
deployment.Spec.Template = corev1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: utils.MergeStringMaps(r.getDeploymentTemplateLabels(), r.getNetworkPolicyLabels(), map[string]string{
resourcesv1alpha1.ProjectedTokenSkip: "true",
}),
},
Spec: corev1.PodSpec{
PriorityClassName: r.values.PriorityClassName,
SecurityContext: &corev1.PodSecurityContext{
SeccompProfile: &corev1.SeccompProfile{
Type: corev1.SeccompProfileTypeRuntimeDefault,
},
},
ServiceAccountName: serviceAccountName,
Containers: []corev1.Container{
{
Name: containerName,
Image: r.values.Image,
ImagePullPolicy: corev1.PullIfNotPresent,
Args: []string{fmt.Sprintf("--config=%s/%s", volumeMountPathConfiguration, configMapDataKey)},
Ports: []corev1.ContainerPort{
{
Name: "metrics",
ContainerPort: metricsPort,
Protocol: corev1.ProtocolTCP,
},
{
Name: "health",
ContainerPort: healthPort,
Protocol: corev1.ProtocolTCP,
},
},
Resources: corev1.ResourceRequirements{
Requests: corev1.ResourceList{
corev1.ResourceCPU: resource.MustParse("23m"),
corev1.ResourceMemory: resource.MustParse("47Mi"),
},
},
LivenessProbe: &corev1.Probe{
ProbeHandler: corev1.ProbeHandler{
HTTPGet: &corev1.HTTPGetAction{
Path: "/healthz",
Scheme: "HTTP",
Port: intstr.FromInt(healthPort),
},
},
InitialDelaySeconds: 30,
FailureThreshold: 5,
PeriodSeconds: 10,
SuccessThreshold: 1,
TimeoutSeconds: 5,
},
ReadinessProbe: &corev1.Probe{
ProbeHandler: corev1.ProbeHandler{
HTTPGet: &corev1.HTTPGetAction{
Path: "/readyz",
Scheme: "HTTP",
Port: intstr.FromInt(healthPort),
},
},
InitialDelaySeconds: 10,
},
VolumeMounts: []corev1.VolumeMount{
{
Name: volumeNameAPIServerAccess,
MountPath: volumeMountPathAPIServerAccess,
ReadOnly: true,
},
{
MountPath: volumeMountPathCerts,
Name: volumeNameCerts,
ReadOnly: true,
},
{
MountPath: volumeMountPathConfiguration,
Name: volumeNameConfiguration,
ReadOnly: true,
},
},
},
},
Volumes: []corev1.Volume{
{
Name: volumeNameAPIServerAccess,
VolumeSource: corev1.VolumeSource{
Projected: &corev1.ProjectedVolumeSource{
DefaultMode: pointer.Int32(420),
Sources: []corev1.VolumeProjection{
{
ServiceAccountToken: &corev1.ServiceAccountTokenProjection{
ExpirationSeconds: pointer.Int64(60 * 60 * 12),
Path: "token",
},
},
{
ConfigMap: &corev1.ConfigMapProjection{
LocalObjectReference: corev1.LocalObjectReference{
Name: "kube-root-ca.crt",
},
Items: []corev1.KeyToPath{{
Key: "ca.crt",
Path: "ca.crt",
}},
},
},
{
DownwardAPI: &corev1.DownwardAPIProjection{
Items: []corev1.DownwardAPIVolumeFile{{
FieldRef: &corev1.ObjectFieldSelector{
APIVersion: "v1",
FieldPath: "metadata.namespace",
},
Path: "namespace",
}},
},
},
},
},
},
},
{
Name: volumeNameCerts,
VolumeSource: corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: secretServer.Name,
DefaultMode: pointer.Int32(420),
},
},
},
{
Name: volumeNameConfiguration,
VolumeSource: corev1.VolumeSource{
ConfigMap: &corev1.ConfigMapVolumeSource{
LocalObjectReference: corev1.LocalObjectReference{
Name: configMap.Name,
},
},
},
},
},
},
}
if r.values.TargetDiffersFromSourceCluster {
clusterCASecret, found := r.secretsManager.Get(v1beta1constants.SecretNameCACluster)
if !found {
return fmt.Errorf("secret %q not found", v1beta1constants.SecretNameCACluster)
}
deployment.Spec.Template.Spec.Volumes = append(deployment.Spec.Template.Spec.Volumes, corev1.Volume{
Name: volumeNameRootCA,
VolumeSource: corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: clusterCASecret.Name,
DefaultMode: pointer.Int32(420),
},
},
})
deployment.Spec.Template.Spec.Containers[0].VolumeMounts = append(deployment.Spec.Template.Spec.Containers[0].VolumeMounts, corev1.VolumeMount{
MountPath: volumeMountPathRootCA,
Name: volumeNameRootCA,
ReadOnly: true,
})
if r.secrets.BootstrapKubeconfig != nil {
deployment.Spec.Template.Spec.Volumes = append(deployment.Spec.Template.Spec.Volumes, corev1.Volume{
Name: volumeNameBootstrapKubeconfig,
VolumeSource: corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: r.secrets.BootstrapKubeconfig.Name,
DefaultMode: pointer.Int32(420),
},
},
})
deployment.Spec.Template.Spec.Containers[0].VolumeMounts = append(deployment.Spec.Template.Spec.Containers[0].VolumeMounts, corev1.VolumeMount{
MountPath: gardenerutils.VolumeMountPathGenericKubeconfig,
Name: volumeNameBootstrapKubeconfig,
ReadOnly: true,
})
} else if r.secrets.shootAccess != nil {
genericTokenKubeconfigSecret, found := r.secretsManager.Get(v1beta1constants.SecretNameGenericTokenKubeconfig)
if !found {
return fmt.Errorf("secret %q not found", v1beta1constants.SecretNameGenericTokenKubeconfig)
}
utilruntime.Must(gardenerutils.InjectGenericKubeconfig(deployment, genericTokenKubeconfigSecret.Name, r.secrets.shootAccess.Secret.Name))
}
}
utilruntime.Must(references.InjectAnnotations(deployment))
if r.values.TargetDiffersFromSourceCluster {
deployment.Labels = utils.MergeStringMaps(deployment.Labels, map[string]string{
resourcesv1alpha1.HighAvailabilityConfigType: resourcesv1alpha1.HighAvailabilityConfigTypeServer,
})
} else {
deployment.Labels = utils.MergeStringMaps(deployment.Labels, map[string]string{
resourcesv1alpha1.HighAvailabilityConfigSkip: "true",
})
deployment.Spec.Template.Spec.TopologySpreadConstraints = kubernetesutils.GetTopologySpreadConstraints(pointer.Int32Deref(r.values.Replicas, 0), pointer.Int32Deref(r.values.Replicas, 0), metav1.LabelSelector{MatchLabels: r.getDeploymentTemplateLabels()}, int32(len(r.values.Zones)), nil)
// ATTENTION: THIS MUST BE THE LAST THING HAPPENING IN THIS FUNCTION TO MAKE SURE THE COMPUTED CHECKSUM IS
// ACCURATE!
// TODO(timuthy): Remove this workaround once the Kubernetes MatchLabelKeysInPodTopologySpread feature gate is beta
// and enabled by default (probably 1.26+) for all supported clusters.
{
// Assign a predictable but unique label value per ReplicaSet which can be used for the
// Topology Spread Constraint selectors to prevent imbalanced deployments after rolling-updates.
// See https://github.com/kubernetes/kubernetes/issues/98215 for more information.
// This must be done as a last step because we need to consider that the pod topology constraints themselves
// can change and cause a rolling update.
podTemplateChecksum := utils.ComputeChecksum(deployment.Spec.Template)[:16]
deployment.Spec.Template.Labels[labelChecksum] = podTemplateChecksum
for i := range deployment.Spec.Template.Spec.TopologySpreadConstraints {
deployment.Spec.Template.Spec.TopologySpreadConstraints[i].LabelSelector.MatchLabels[labelChecksum] = podTemplateChecksum
}
}
}
return nil
})
return err
}
func (r *resourceManager) emptyDeployment() *appsv1.Deployment {
return &appsv1.Deployment{ObjectMeta: metav1.ObjectMeta{Name: v1beta1constants.DeploymentNameGardenerResourceManager, Namespace: r.namespace}}