/
defaults.go
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/
defaults.go
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// Copyright (c) 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 v1alpha1
import (
"math"
"github.com/gardener/gardener/pkg/utils"
versionutils "github.com/gardener/gardener/pkg/utils/version"
corev1 "k8s.io/api/core/v1"
rbacv1 "k8s.io/api/rbac/v1"
"k8s.io/apimachinery/pkg/runtime"
)
func addDefaultingFuncs(scheme *runtime.Scheme) error {
return RegisterDefaults(scheme)
}
// SetDefaults_SecretBinding sets default values for SecretBinding objects.
func SetDefaults_SecretBinding(obj *SecretBinding) {
if len(obj.SecretRef.Namespace) == 0 {
obj.SecretRef.Namespace = obj.Namespace
}
for i, quota := range obj.Quotas {
if len(quota.Namespace) == 0 {
obj.Quotas[i].Namespace = obj.Namespace
}
}
}
// SetDefaults_Project sets default values for Project objects.
func SetDefaults_Project(obj *Project) {
defaultSubject(obj.Spec.Owner)
for i, member := range obj.Spec.Members {
defaultSubject(&obj.Spec.Members[i].Subject)
if len(member.Role) == 0 && len(member.Roles) == 0 {
obj.Spec.Members[i].Role = ProjectMemberViewer
}
}
}
func defaultSubject(obj *rbacv1.Subject) {
if obj != nil && len(obj.APIGroup) == 0 {
switch obj.Kind {
case rbacv1.ServiceAccountKind:
obj.APIGroup = ""
case rbacv1.UserKind:
obj.APIGroup = rbacv1.GroupName
case rbacv1.GroupKind:
obj.APIGroup = rbacv1.GroupName
}
}
}
// SetDefaults_MachineType sets default values for MachineType objects.
func SetDefaults_MachineType(obj *MachineType) {
if obj.Usable == nil {
trueVar := true
obj.Usable = &trueVar
}
}
// SetDefaults_VolumeType sets default values for VolumeType objects.
func SetDefaults_VolumeType(obj *VolumeType) {
if obj.Usable == nil {
trueVar := true
obj.Usable = &trueVar
}
}
// SetDefaults_Shoot sets default values for Shoot objects.
func SetDefaults_Shoot(obj *Shoot) {
k8sVersionLessThan116, _ := versionutils.CompareVersions(obj.Spec.Kubernetes.Version, "<", "1.16")
// Error is ignored here because we cannot do anything meaningful with it.
// k8sVersionLessThan116 will default to `false`.
trueVar := true
falseVar := false
if obj.Spec.Kubernetes.AllowPrivilegedContainers == nil {
obj.Spec.Kubernetes.AllowPrivilegedContainers = &trueVar
}
if obj.Spec.Kubernetes.KubeAPIServer == nil {
obj.Spec.Kubernetes.KubeAPIServer = &KubeAPIServerConfig{}
}
if obj.Spec.Kubernetes.KubeAPIServer.EnableBasicAuthentication == nil {
if k8sVersionLessThan116 {
obj.Spec.Kubernetes.KubeAPIServer.EnableBasicAuthentication = &trueVar
} else {
obj.Spec.Kubernetes.KubeAPIServer.EnableBasicAuthentication = &falseVar
}
}
if obj.Spec.Kubernetes.KubeControllerManager == nil {
obj.Spec.Kubernetes.KubeControllerManager = &KubeControllerManagerConfig{}
}
if obj.Spec.Kubernetes.KubeControllerManager.NodeCIDRMaskSize == nil {
obj.Spec.Kubernetes.KubeControllerManager.NodeCIDRMaskSize = calculateDefaultNodeCIDRMaskSize(obj.Spec.Kubernetes.Kubelet, obj.Spec.Provider.Workers)
}
if obj.Spec.Kubernetes.KubeProxy == nil {
obj.Spec.Kubernetes.KubeProxy = &KubeProxyConfig{}
}
if obj.Spec.Kubernetes.KubeProxy.Mode == nil {
defaultProxyMode := ProxyModeIPTables
obj.Spec.Kubernetes.KubeProxy.Mode = &defaultProxyMode
}
if obj.Spec.Addons == nil {
obj.Spec.Addons = &Addons{}
}
if obj.Spec.Addons.KubernetesDashboard == nil {
obj.Spec.Addons.KubernetesDashboard = &KubernetesDashboard{}
}
if obj.Spec.Addons.KubernetesDashboard.AuthenticationMode == nil {
var defaultAuthMode string
if *obj.Spec.Kubernetes.KubeAPIServer.EnableBasicAuthentication {
defaultAuthMode = KubernetesDashboardAuthModeBasic
} else {
defaultAuthMode = KubernetesDashboardAuthModeToken
}
obj.Spec.Addons.KubernetesDashboard.AuthenticationMode = &defaultAuthMode
}
if obj.Spec.Purpose == nil {
p := ShootPurposeEvaluation
obj.Spec.Purpose = &p
}
}
// SetDefaults_Maintenance sets default values for Maintenance objects.
func SetDefaults_Maintenance(obj *Maintenance) {
if obj == nil {
obj = &Maintenance{}
}
if obj.AutoUpdate == nil {
obj.AutoUpdate = &MaintenanceAutoUpdate{
KubernetesVersion: true,
MachineImageVersion: true,
}
}
if obj.TimeWindow == nil {
mt := utils.RandomMaintenanceTimeWindow()
obj.TimeWindow = &MaintenanceTimeWindow{
Begin: mt.Begin().Formatted(),
End: mt.End().Formatted(),
}
}
}
// SetDefaults_Worker sets default values for Worker objects.
func SetDefaults_Worker(obj *Worker) {
if obj.MaxSurge == nil {
obj.MaxSurge = &DefaultWorkerMaxSurge
}
if obj.MaxUnavailable == nil {
obj.MaxUnavailable = &DefaultWorkerMaxUnavailable
}
}
// SetDefaults_NginxIngress sets default values for NginxIngress objects.
func SetDefaults_NginxIngress(obj *NginxIngress) {
if obj.ExternalTrafficPolicy == nil {
v := corev1.ServiceExternalTrafficPolicyTypeCluster
obj.ExternalTrafficPolicy = &v
}
}
// Helper functions
func calculateDefaultNodeCIDRMaskSize(kubelet *KubeletConfig, workers []Worker) *int32 {
var maxPods int32 = 110 // default maxPods setting on kubelet
if kubelet != nil && kubelet.MaxPods != nil {
maxPods = *kubelet.MaxPods
}
for _, worker := range workers {
if worker.Kubernetes != nil && worker.Kubernetes.Kubelet != nil && worker.Kubernetes.Kubelet.MaxPods != nil && *worker.Kubernetes.Kubelet.MaxPods > maxPods {
maxPods = *worker.Kubernetes.Kubelet.MaxPods
}
}
// by having approximately twice as many available IP addresses as possible Pods, Kubernetes is able to mitigate IP address reuse as Pods are added to and removed from a node.
nodeCidrRange := int32(32 - int(math.Ceil(math.Log2(float64(maxPods*2)))))
return &nodeCidrRange
}