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vpn_seed_server.go
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vpn_seed_server.go
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// 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 vpnseedserver
import (
"context"
"fmt"
"path/filepath"
"github.com/Masterminds/semver"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
"github.com/gardener/gardener/pkg/controllerutils"
"github.com/gardener/gardener/pkg/gardenlet/apis/config"
"github.com/gardener/gardener/pkg/operation/botanist/component"
"github.com/gardener/gardener/pkg/resourcemanager/controller/garbagecollector/references"
"github.com/gardener/gardener/pkg/utils"
gutil "github.com/gardener/gardener/pkg/utils/gardener"
kutil "github.com/gardener/gardener/pkg/utils/kubernetes"
secretutils "github.com/gardener/gardener/pkg/utils/secrets"
secretsmanager "github.com/gardener/gardener/pkg/utils/secrets/manager"
"github.com/gardener/gardener/pkg/utils/version"
"google.golang.org/protobuf/types/known/durationpb"
"google.golang.org/protobuf/types/known/wrapperspb"
istionetworkingv1beta1 "istio.io/api/networking/v1beta1"
networkingv1alpha3 "istio.io/client-go/pkg/apis/networking/v1alpha3"
networkingv1beta1 "istio.io/client-go/pkg/apis/networking/v1beta1"
appsv1 "k8s.io/api/apps/v1"
autoscalingv1 "k8s.io/api/autoscaling/v1"
corev1 "k8s.io/api/core/v1"
networkingv1 "k8s.io/api/networking/v1"
policyv1 "k8s.io/api/policy/v1"
policyv1beta1 "k8s.io/api/policy/v1beta1"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"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"
"k8s.io/utils/pointer"
"sigs.k8s.io/controller-runtime/pkg/client"
)
const (
// GatewayPort is the port exposed by the istio ingress gateway
GatewayPort = 8132
// SecretNameTLSAuth is the name of seed server tlsauth Secret.
SecretNameTLSAuth = "vpn-seed-server-tlsauth"
// DeploymentName is the name of vpn seed server deployment.
DeploymentName = v1beta1constants.DeploymentNameVPNSeedServer
// ServiceName is the name of the vpn seed server service running internally on the control plane in seed.
ServiceName = DeploymentName
// EnvoyPort is the port exposed by the envoy proxy on which it receives http proxy/connect requests.
EnvoyPort = 9443
// OpenVPNPort is the port exposed by the vpn seed server for tcp tunneling.
OpenVPNPort = 1194
metricsPort = 15000
metricsPortName = "metrics"
secretNameDH = "vpn-seed-server-dh"
envoyProxyContainerName = "envoy-proxy"
fileNameEnvoyConfig = "envoy.yaml"
fileNameCABundle = "ca.crt"
volumeMountPathDevNetTun = "/dev/net/tun"
volumeMountPathCerts = "/srv/secrets/vpn-server"
volumeMountPathTLSAuth = "/srv/secrets/tlsauth"
volumeMountPathDH = "/srv/secrets/dh"
volumeMountPathEnvoyConfig = "/etc/envoy"
volumeMountPathStatusDir = "/srv/status"
volumeNameDevNetTun = "dev-net-tun"
volumeNameCerts = "certs"
volumeNameTLSAuth = "tlsauth"
volumeNameDH = "dh"
volumeNameEnvoyConfig = "envoy-config"
volumeNameStatusDir = "openvpn-status"
)
// Interface contains functions for a vpn-seed-server deployer.
type Interface interface {
component.DeployWaiter
component.MonitoringComponent
// SetSecrets sets the secrets.
SetSecrets(Secrets)
// SetSeedNamespaceObjectUID sets UID for the namespace
SetSeedNamespaceObjectUID(namespaceUID types.UID)
// SetExposureClassHandlerName sets the name of the ExposureClass handler.
SetExposureClassHandlerName(string)
// SetSNIConfig set the sni config.
SetSNIConfig(*config.SNI)
// GetValues returns the current configuration values of the deployer.
GetValues() Values
}
// Secrets is collection of secrets for the vpn-seed-server.
type Secrets struct {
// DiffieHellmanKey is a secret containing the diffie hellman key.
DiffieHellmanKey component.Secret
}
// IstioIngressGateway contains the values for istio ingress gateway configuration.
type IstioIngressGateway struct {
Namespace string
Labels map[string]string
}
// NetworkValues contains the configuration values for the network.
type NetworkValues struct {
// PodCIDR is the CIDR of the pod network.
PodCIDR string
// ServiceCIDR is the CIDR of the service network.
ServiceCIDR string
// NodeCIDR is the CIDR of the node network.
NodeCIDR string
}
// Values is a set of configuration values for the VPNSeedServer component.
type Values struct {
// ImageAPIServerProxy is the image name of the apiserver-proxy
ImageAPIServerProxy string
// ImageVPNSeedServer is the image name of the vpn-seed-server
ImageVPNSeedServer string
// KubeAPIServerHost is the FQDN of the kube-apiserver
KubeAPIServerHost *string
// Network contains the configuration values for the network.
Network NetworkValues
// Replicas is the number of deployment replicas
Replicas int32
// HighAvailabilityEnabled marks whether HA is enabled for VPN.
HighAvailabilityEnabled bool
// HighAvailabilityNumberOfSeedServers is the number of VPN seed servers used for HA
HighAvailabilityNumberOfSeedServers int
// HighAvailabilityNumberOfShootClients is the number of VPN shoot clients used for HA
HighAvailabilityNumberOfShootClients int
// IstioIngressGateway contains the values for istio ingress gateway configuration.
IstioIngressGateway IstioIngressGateway
// SeedVersion is the Kubernetes version of the Seed.
SeedVersion *semver.Version
}
// New creates a new instance of DeployWaiter for the vpn-seed-server.
func New(
client client.Client,
namespace string,
secretsManager secretsmanager.Interface,
values Values,
) Interface {
return &vpnSeedServer{
client: client,
namespace: namespace,
secretsManager: secretsManager,
values: values,
}
}
type vpnSeedServer struct {
client client.Client
namespace string
secretsManager secretsmanager.Interface
namespaceUID types.UID
values Values
exposureClassHandlerName *string
sniConfig *config.SNI
secrets Secrets
}
func (v *vpnSeedServer) GetValues() Values {
return v.values
}
func (v *vpnSeedServer) Deploy(ctx context.Context) error {
if v.secrets.DiffieHellmanKey.Name == "" || v.secrets.DiffieHellmanKey.Checksum == "" {
return fmt.Errorf("missing DH secret information")
}
var (
configMap = &corev1.ConfigMap{
ObjectMeta: metav1.ObjectMeta{
Name: "vpn-seed-server-envoy-config",
Namespace: v.namespace,
},
Data: map[string]string{
fileNameEnvoyConfig: envoyConfig,
},
}
dhSecret = &corev1.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: secretNameDH,
Namespace: v.namespace,
},
Type: corev1.SecretTypeOpaque,
Data: v.secrets.DiffieHellmanKey.Data,
}
)
utilruntime.Must(kutil.MakeUnique(configMap))
utilruntime.Must(kutil.MakeUnique(dhSecret))
secretCAVPN, found := v.secretsManager.Get(v1beta1constants.SecretNameCAVPN)
if !found {
return fmt.Errorf("secret %q not found", v1beta1constants.SecretNameCAVPN)
}
secretServer, err := v.secretsManager.Generate(ctx, &secretutils.CertificateSecretConfig{
Name: "vpn-seed-server",
CommonName: "vpn-seed-server",
DNSNames: kutil.DNSNamesForService(ServiceName, v.namespace),
CertType: secretutils.ServerCert,
SkipPublishingCACertificate: true,
}, secretsmanager.SignedByCA(v1beta1constants.SecretNameCAVPN), secretsmanager.Rotate(secretsmanager.InPlace))
if err != nil {
return err
}
secretTLSAuth, err := v.secretsManager.Generate(ctx, &secretutils.VPNTLSAuthConfig{
Name: SecretNameTLSAuth,
}, secretsmanager.Rotate(secretsmanager.InPlace))
if err != nil {
return err
}
if err := v.client.Create(ctx, configMap); client.IgnoreAlreadyExists(err) != nil {
return err
}
if err := v.client.Create(ctx, dhSecret); client.IgnoreAlreadyExists(err) != nil {
return err
}
if err := v.deployNetworkPolicy(ctx); err != nil {
return err
}
podTemplate := v.podTemplate(configMap, dhSecret, secretCAVPN, secretServer, secretTLSAuth)
labels := map[string]string{
v1beta1constants.GardenRole: v1beta1constants.GardenRoleControlPlane,
v1beta1constants.LabelApp: DeploymentName,
v1beta1constants.LabelNetworkPolicyFromShootAPIServer: v1beta1constants.LabelNetworkPolicyAllowed,
}
if v.values.HighAvailabilityEnabled {
if err := v.deployStatefulSet(ctx, labels, podTemplate); err != nil {
return err
}
for i := 0; i < int(v.values.Replicas); i++ {
if err := v.deployService(ctx, &i); err != nil {
return err
}
if err := v.deployDestinationRule(ctx, &i); err != nil {
return err
}
}
if err := kutil.DeleteObjects(ctx, v.client,
v.emptyDeployment(),
v.emptyService(nil),
v.emptyDestinationRule(nil),
); err != nil {
return err
}
} else {
if err := v.deployDeployment(ctx, labels, podTemplate); err != nil {
return err
}
if err := v.deployService(ctx, nil); err != nil {
return err
}
if err := v.deployDestinationRule(ctx, nil); err != nil {
return err
}
objects := []client.Object{v.emptyStatefulSet()}
for i := 0; i < v.values.HighAvailabilityNumberOfSeedServers; i++ {
objects = append(objects, v.emptyService(&i), v.emptyDestinationRule(&i))
}
if err := kutil.DeleteObjects(ctx, v.client, objects...); err != nil {
return err
}
}
if err := v.deployVPA(ctx); err != nil {
return err
}
return nil
}
func (v *vpnSeedServer) podTemplate(configMap *corev1.ConfigMap, dhSecret, secretCAVPN, secretServer, secretTLSAuth *corev1.Secret) *corev1.PodTemplateSpec {
hostPathCharDev := corev1.HostPathCharDev
template := &corev1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{
v1beta1constants.GardenRole: v1beta1constants.GardenRoleControlPlane,
v1beta1constants.LabelApp: DeploymentName,
v1beta1constants.LabelNetworkPolicyToShootNetworks: v1beta1constants.LabelNetworkPolicyAllowed,
v1beta1constants.LabelNetworkPolicyToDNS: v1beta1constants.LabelNetworkPolicyAllowed,
v1beta1constants.LabelNetworkPolicyToPrivateNetworks: v1beta1constants.LabelNetworkPolicyAllowed,
v1beta1constants.LabelNetworkPolicyFromPrometheus: v1beta1constants.LabelNetworkPolicyAllowed,
},
},
Spec: corev1.PodSpec{
AutomountServiceAccountToken: pointer.Bool(false),
PriorityClassName: v1beta1constants.PriorityClassNameShootControlPlane300,
DNSPolicy: corev1.DNSDefault, // make sure to not use the coredns for DNS resolution.
Containers: []corev1.Container{
{
Name: DeploymentName,
Image: v.values.ImageVPNSeedServer,
ImagePullPolicy: corev1.PullIfNotPresent,
Ports: []corev1.ContainerPort{
{
Name: "tcp-tunnel",
ContainerPort: OpenVPNPort,
Protocol: corev1.ProtocolTCP,
},
},
SecurityContext: &corev1.SecurityContext{
Capabilities: &corev1.Capabilities{
Add: []corev1.Capability{
"NET_ADMIN",
},
},
},
Env: []corev1.EnvVar{
{
Name: "SERVICE_NETWORK",
Value: v.values.Network.ServiceCIDR,
},
{
Name: "POD_NETWORK",
Value: v.values.Network.PodCIDR,
},
{
Name: "NODE_NETWORK",
Value: v.values.Network.NodeCIDR,
},
{
Name: "LOCAL_NODE_IP",
ValueFrom: &corev1.EnvVarSource{
FieldRef: &corev1.ObjectFieldSelector{
FieldPath: "status.hostIP",
},
},
},
},
ReadinessProbe: &corev1.Probe{
ProbeHandler: corev1.ProbeHandler{
TCPSocket: &corev1.TCPSocketAction{
Port: intstr.FromInt(OpenVPNPort),
},
},
},
LivenessProbe: &corev1.Probe{
ProbeHandler: corev1.ProbeHandler{
TCPSocket: &corev1.TCPSocketAction{
Port: intstr.FromInt(OpenVPNPort),
},
},
},
Resources: corev1.ResourceRequirements{
Requests: corev1.ResourceList{
corev1.ResourceCPU: resource.MustParse("100m"),
corev1.ResourceMemory: resource.MustParse("100Mi"),
},
Limits: corev1.ResourceList{
corev1.ResourceMemory: resource.MustParse("100Mi"),
},
},
VolumeMounts: []corev1.VolumeMount{
{
Name: volumeNameDevNetTun,
MountPath: volumeMountPathDevNetTun,
},
{
Name: volumeNameCerts,
MountPath: volumeMountPathCerts,
},
{
Name: volumeNameTLSAuth,
MountPath: volumeMountPathTLSAuth,
},
{
Name: volumeNameDH,
MountPath: volumeMountPathDH,
},
},
},
},
TerminationGracePeriodSeconds: pointer.Int64(30),
Volumes: []corev1.Volume{
{
Name: volumeNameDevNetTun,
VolumeSource: corev1.VolumeSource{
HostPath: &corev1.HostPathVolumeSource{
Path: volumeMountPathDevNetTun,
Type: &hostPathCharDev,
},
},
},
{
Name: volumeNameCerts,
VolumeSource: corev1.VolumeSource{
Projected: &corev1.ProjectedVolumeSource{
DefaultMode: pointer.Int32(420),
Sources: []corev1.VolumeProjection{
{
Secret: &corev1.SecretProjection{
LocalObjectReference: corev1.LocalObjectReference{
Name: secretCAVPN.Name,
},
Items: []corev1.KeyToPath{{
Key: secretutils.DataKeyCertificateBundle,
Path: fileNameCABundle,
}},
},
},
{
Secret: &corev1.SecretProjection{
LocalObjectReference: corev1.LocalObjectReference{
Name: secretServer.Name,
},
Items: []corev1.KeyToPath{
{
Key: secretutils.DataKeyCertificate,
Path: secretutils.DataKeyCertificate,
},
{
Key: secretutils.DataKeyPrivateKey,
Path: secretutils.DataKeyPrivateKey,
},
},
},
},
},
},
},
},
{
Name: volumeNameTLSAuth,
VolumeSource: corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: secretTLSAuth.Name,
DefaultMode: pointer.Int32(0400),
},
},
},
{
Name: volumeNameDH,
VolumeSource: corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: dhSecret.Name,
DefaultMode: pointer.Int32(0400),
},
},
},
},
},
}
if !v.values.HighAvailabilityEnabled {
template.Spec.Containers = append(template.Spec.Containers, corev1.Container{
Name: envoyProxyContainerName,
Image: v.values.ImageAPIServerProxy,
ImagePullPolicy: corev1.PullIfNotPresent,
SecurityContext: &corev1.SecurityContext{
Capabilities: &corev1.Capabilities{
Drop: []corev1.Capability{
"all",
},
},
},
Command: []string{
"envoy",
"--concurrency",
"2",
"-c",
fmt.Sprintf("%s/%s", volumeMountPathEnvoyConfig, fileNameEnvoyConfig),
},
ReadinessProbe: &corev1.Probe{
ProbeHandler: corev1.ProbeHandler{
TCPSocket: &corev1.TCPSocketAction{
Port: intstr.FromInt(EnvoyPort),
},
},
},
LivenessProbe: &corev1.Probe{
ProbeHandler: corev1.ProbeHandler{
TCPSocket: &corev1.TCPSocketAction{
Port: intstr.FromInt(EnvoyPort),
},
},
},
Resources: corev1.ResourceRequirements{
Requests: corev1.ResourceList{
corev1.ResourceCPU: resource.MustParse("20m"),
corev1.ResourceMemory: resource.MustParse("20Mi"),
},
Limits: corev1.ResourceList{
corev1.ResourceMemory: resource.MustParse("850M"),
},
},
VolumeMounts: []corev1.VolumeMount{
{
Name: volumeNameCerts,
MountPath: volumeMountPathCerts,
},
{
Name: volumeNameEnvoyConfig,
MountPath: volumeMountPathEnvoyConfig,
},
},
})
template.Spec.Volumes = append(template.Spec.Volumes, corev1.Volume{
Name: volumeNameEnvoyConfig,
VolumeSource: corev1.VolumeSource{
ConfigMap: &corev1.ConfigMapVolumeSource{
LocalObjectReference: corev1.LocalObjectReference{
Name: configMap.Name,
},
},
},
})
} else {
statusPath := filepath.Join(volumeMountPathStatusDir, "openvpn.status")
template.Spec.Containers = append(template.Spec.Containers, corev1.Container{
Name: "openvpn-exporter",
Image: v.values.ImageVPNSeedServer,
ImagePullPolicy: corev1.PullIfNotPresent,
Command: []string{
"/openvpn-exporter",
"-openvpn.status_paths",
statusPath,
"-web.listen-address",
fmt.Sprintf(":%d", metricsPort),
},
Ports: []corev1.ContainerPort{
{
Name: metricsPortName,
ContainerPort: metricsPort,
Protocol: corev1.ProtocolTCP,
},
},
SecurityContext: &corev1.SecurityContext{
Capabilities: &corev1.Capabilities{
Drop: []corev1.Capability{
"all",
},
},
},
ReadinessProbe: &corev1.Probe{
ProbeHandler: corev1.ProbeHandler{
TCPSocket: &corev1.TCPSocketAction{
Port: intstr.FromInt(metricsPort),
},
},
},
LivenessProbe: &corev1.Probe{
ProbeHandler: corev1.ProbeHandler{
TCPSocket: &corev1.TCPSocketAction{
Port: intstr.FromInt(metricsPort),
},
},
},
Resources: corev1.ResourceRequirements{
Requests: corev1.ResourceList{
corev1.ResourceCPU: resource.MustParse("20m"),
corev1.ResourceMemory: resource.MustParse("100Mi"),
},
Limits: corev1.ResourceList{
corev1.ResourceMemory: resource.MustParse("100Mi"),
},
},
VolumeMounts: []corev1.VolumeMount{
{
Name: volumeNameStatusDir,
MountPath: volumeMountPathStatusDir,
},
},
})
template.Spec.Containers[0].Env = append(template.Spec.Containers[0].Env, corev1.EnvVar{
Name: "OPENVPN_STATUS_PATH",
Value: statusPath,
})
template.Spec.Containers[0].VolumeMounts = append(template.Spec.Containers[0].VolumeMounts, corev1.VolumeMount{
Name: volumeNameStatusDir,
MountPath: volumeMountPathStatusDir,
})
template.Spec.Volumes = append(template.Spec.Volumes, corev1.Volume{
Name: volumeNameStatusDir,
VolumeSource: corev1.VolumeSource{
EmptyDir: &corev1.EmptyDirVolumeSource{},
},
})
}
if v.values.HighAvailabilityEnabled {
template.Spec.Containers[0].Env = append(
template.Spec.Containers[0].Env,
[]corev1.EnvVar{
{
Name: "CLIENT_TO_CLIENT",
Value: "true",
},
{
Name: "POD_NAME",
ValueFrom: &corev1.EnvVarSource{
FieldRef: &corev1.ObjectFieldSelector{
FieldPath: "metadata.name",
},
},
},
{
Name: "HA_VPN_CLIENTS",
Value: fmt.Sprintf("%d", v.values.HighAvailabilityNumberOfShootClients),
},
}...)
}
return template
}
func (v *vpnSeedServer) deployStatefulSet(ctx context.Context, labels map[string]string, template *corev1.PodTemplateSpec) error {
sts := v.emptyStatefulSet()
podLabels := map[string]string{
v1beta1constants.LabelApp: DeploymentName,
}
_, err := controllerutils.GetAndCreateOrMergePatch(ctx, v.client, sts, func() error {
sts.Labels = labels
sts.Spec = appsv1.StatefulSetSpec{
PodManagementPolicy: appsv1.ParallelPodManagement,
Replicas: pointer.Int32(v.values.Replicas),
RevisionHistoryLimit: pointer.Int32(1),
Selector: &metav1.LabelSelector{MatchLabels: podLabels},
UpdateStrategy: appsv1.StatefulSetUpdateStrategy{
Type: appsv1.RollingUpdateStatefulSetStrategyType,
},
Template: *template,
}
utilruntime.Must(references.InjectAnnotations(sts))
return nil
})
if err != nil {
return err
}
return v.deployPodDisruptionBudget(ctx, podLabels)
}
func (v *vpnSeedServer) deployPodDisruptionBudget(ctx context.Context, podLabels map[string]string) error {
var (
pdbMaxUnavailable = intstr.FromInt(1)
pdbSelector = &metav1.LabelSelector{MatchLabels: podLabels}
)
obj := v.emptyPodDisruptionBudget()
_, err := controllerutils.GetAndCreateOrMergePatch(ctx, v.client, obj, func() error {
switch pdb := obj.(type) {
case *policyv1.PodDisruptionBudget:
pdb.Labels = podLabels
pdb.Spec = policyv1.PodDisruptionBudgetSpec{
MaxUnavailable: &pdbMaxUnavailable,
Selector: pdbSelector,
}
case *policyv1beta1.PodDisruptionBudget:
pdb.Labels = podLabels
pdb.Spec = policyv1beta1.PodDisruptionBudgetSpec{
MaxUnavailable: &pdbMaxUnavailable,
Selector: pdbSelector,
}
}
return nil
})
return err
}
func (v *vpnSeedServer) deployDeployment(ctx context.Context, labels map[string]string, template *corev1.PodTemplateSpec) error {
deployment := v.emptyDeployment()
_, err := controllerutils.GetAndCreateOrMergePatch(ctx, v.client, deployment, func() error {
maxSurge := intstr.FromInt(100)
maxUnavailable := intstr.FromInt(0)
deployment.Labels = labels
deployment.Spec = appsv1.DeploymentSpec{
Replicas: pointer.Int32(v.values.Replicas),
RevisionHistoryLimit: pointer.Int32(1),
Selector: &metav1.LabelSelector{MatchLabels: map[string]string{
v1beta1constants.LabelApp: DeploymentName,
}},
Strategy: appsv1.DeploymentStrategy{
RollingUpdate: &appsv1.RollingUpdateDeployment{
MaxUnavailable: &maxUnavailable,
MaxSurge: &maxSurge,
},
Type: appsv1.RollingUpdateDeploymentStrategyType,
},
Template: *template,
}
utilruntime.Must(references.InjectAnnotations(deployment))
return nil
})
return err
}
func (v *vpnSeedServer) deployService(ctx context.Context, idx *int) error {
var (
service = v.emptyService(idx)
)
_, err := controllerutils.GetAndCreateOrMergePatch(ctx, v.client, service, func() error {
service.Annotations = map[string]string{
"networking.istio.io/exportTo": "*",
}
service.Spec.Type = corev1.ServiceTypeClusterIP
service.Spec.Ports = []corev1.ServicePort{
{
Name: DeploymentName,
Port: OpenVPNPort,
TargetPort: intstr.FromInt(OpenVPNPort),
},
{
Name: "http-proxy",
Port: EnvoyPort,
TargetPort: intstr.FromInt(EnvoyPort),
},
{
Name: metricsPortName,
Port: metricsPort,
TargetPort: intstr.FromInt(metricsPort),
},
}
if idx == nil {
service.Spec.Selector = map[string]string{
v1beta1constants.LabelApp: DeploymentName,
}
} else {
service.Spec.Selector = map[string]string{
"statefulset.kubernetes.io/pod-name": v.indexedName(idx),
}
}
return nil
})
return err
}
func (v *vpnSeedServer) deployDestinationRule(ctx context.Context, idx *int) error {
destinationRule := v.emptyDestinationRule(idx)
_, err := controllerutils.GetAndCreateOrMergePatch(ctx, v.client, destinationRule, func() error {
destinationRule.Spec = istionetworkingv1beta1.DestinationRule{
ExportTo: []string{"*"},
Host: fmt.Sprintf("%s.%s.svc.cluster.local", v.indexedName(idx), v.namespace),
TrafficPolicy: &istionetworkingv1beta1.TrafficPolicy{
ConnectionPool: &istionetworkingv1beta1.ConnectionPoolSettings{
Tcp: &istionetworkingv1beta1.ConnectionPoolSettings_TCPSettings{
MaxConnections: 5000,
TcpKeepalive: &istionetworkingv1beta1.ConnectionPoolSettings_TCPSettings_TcpKeepalive{
Interval: &durationpb.Duration{
Seconds: 75,
},
Time: &durationpb.Duration{
Seconds: 7200,
},
},
},
},
LoadBalancer: &istionetworkingv1beta1.LoadBalancerSettings{
LocalityLbSetting: &istionetworkingv1beta1.LocalityLoadBalancerSetting{
Enabled: &wrapperspb.BoolValue{Value: true},
FailoverPriority: []string{corev1.LabelTopologyZone},
},
},
// OutlierDetection is required for locality settings to take effect
OutlierDetection: &istionetworkingv1beta1.OutlierDetection{
MinHealthPercent: 0,
},
Tls: &istionetworkingv1beta1.ClientTLSSettings{
Mode: istionetworkingv1beta1.ClientTLSSettings_DISABLE,
},
},
}
return nil
})
return err
}
func (v *vpnSeedServer) deployNetworkPolicy(ctx context.Context) error {
var (
networkPolicy = v.emptyNetworkPolicy()
igwSelectors = v.getIngressGatewaySelectors()
)
_, err := controllerutils.GetAndCreateOrMergePatch(ctx, v.client, networkPolicy, func() error {
networkPolicy.ObjectMeta.Annotations = map[string]string{
v1beta1constants.GardenerDescription: "Allows only Ingress/Egress between the kube-apiserver of the same control plane and the corresponding vpn-seed-server and Ingress from the istio ingress gateway to the vpn-seed-server.",
}
networkPolicy.Spec = networkingv1.NetworkPolicySpec{
PodSelector: metav1.LabelSelector{
MatchLabels: GetLabels(),
},
Ingress: []networkingv1.NetworkPolicyIngressRule{
{
From: []networkingv1.NetworkPolicyPeer{
{
PodSelector: &metav1.LabelSelector{
MatchLabels: map[string]string{
v1beta1constants.GardenRole: v1beta1constants.GardenRoleControlPlane,
v1beta1constants.LabelApp: v1beta1constants.LabelKubernetes,
v1beta1constants.LabelRole: v1beta1constants.LabelAPIServer,
},
},
},
},
},
{
From: []networkingv1.NetworkPolicyPeer{
{
PodSelector: &metav1.LabelSelector{
MatchLabels: map[string]string{
v1beta1constants.GardenRole: v1beta1constants.GardenRoleMonitoring,
v1beta1constants.LabelApp: v1beta1constants.StatefulSetNamePrometheus,
v1beta1constants.LabelRole: v1beta1constants.GardenRoleMonitoring,
},
},
},
},
},
{
From: []networkingv1.NetworkPolicyPeer{
{
// we don't want to modify existing labels on the istio namespace
NamespaceSelector: &metav1.LabelSelector{},
PodSelector: &metav1.LabelSelector{
MatchLabels: igwSelectors,
},
},
},
},
},
Egress: []networkingv1.NetworkPolicyEgressRule{
{
To: []networkingv1.NetworkPolicyPeer{
{
PodSelector: &metav1.LabelSelector{
MatchLabels: map[string]string{
v1beta1constants.GardenRole: v1beta1constants.GardenRoleControlPlane,
v1beta1constants.LabelApp: v1beta1constants.LabelKubernetes,
v1beta1constants.LabelRole: v1beta1constants.LabelAPIServer,
},
},
},
},
},
},
PolicyTypes: []networkingv1.PolicyType{
networkingv1.PolicyTypeIngress,
networkingv1.PolicyTypeEgress,
},
}
return nil
})
return err
}
func (v *vpnSeedServer) deployVPA(ctx context.Context) error {
var (
vpa = v.emptyVPA()
vpaUpdateMode = vpaautoscalingv1.UpdateModeAuto
controlledValues = vpaautoscalingv1.ContainerControlledValuesRequestsOnly
)
_, err := controllerutils.GetAndCreateOrMergePatch(ctx, v.client, vpa, func() error {
vpa.Spec.TargetRef = &autoscalingv1.CrossVersionObjectReference{
APIVersion: appsv1.SchemeGroupVersion.String(),
Kind: "Deployment",
Name: DeploymentName,
}
vpa.Spec.UpdatePolicy = &vpaautoscalingv1.PodUpdatePolicy{
UpdateMode: &vpaUpdateMode,
}
vpa.Spec.ResourcePolicy = &vpaautoscalingv1.PodResourcePolicy{
ContainerPolicies: []vpaautoscalingv1.ContainerResourcePolicy{
{
ContainerName: DeploymentName,
MinAllowed: corev1.ResourceList{
corev1.ResourceCPU: resource.MustParse("100m"),
corev1.ResourceMemory: resource.MustParse("100Mi"),
},
ControlledValues: &controlledValues,
},
{
ContainerName: envoyProxyContainerName,
MinAllowed: corev1.ResourceList{
corev1.ResourceCPU: resource.MustParse("20m"),
corev1.ResourceMemory: resource.MustParse("20Mi"),
},
ControlledValues: &controlledValues,
},
},
}
return nil
})
return err
}
func (v *vpnSeedServer) Destroy(ctx context.Context) error {
objects := []client.Object{
v.emptyNetworkPolicy(),
v.emptyDeployment(),
v.emptyStatefulSet(),
v.emptyDestinationRule(nil),
v.emptyService(nil),
v.emptyVPA(),
v.emptyEnvoyFilter(),
v.emptyPodDisruptionBudget(),
}
for i := 0; i < v.values.HighAvailabilityNumberOfSeedServers; i++ {
objects = append(objects, v.emptyDestinationRule(&i), v.emptyService(&i))
}
return kutil.DeleteObjects(ctx, v.client, objects...)
}
func (v *vpnSeedServer) Wait(_ context.Context) error { return nil }
func (v *vpnSeedServer) WaitCleanup(_ context.Context) error { return nil }
func (v *vpnSeedServer) SetSecrets(secrets Secrets) { v.secrets = secrets }
func (v *vpnSeedServer) SetSeedNamespaceObjectUID(namespaceUID types.UID) {
v.namespaceUID = namespaceUID
}
func (v *vpnSeedServer) SetExposureClassHandlerName(handlerName string) {
v.exposureClassHandlerName = &handlerName
}
func (v *vpnSeedServer) SetSNIConfig(cfg *config.SNI) { v.sniConfig = cfg }
func (v *vpnSeedServer) indexedName(idx *int) string {
if idx == nil {
return DeploymentName
}
return fmt.Sprintf("%s-%d", DeploymentName, *idx)
}
func (v *vpnSeedServer) emptyService(idx *int) *corev1.Service {
return &corev1.Service{ObjectMeta: metav1.ObjectMeta{Name: v.indexedName(idx), Namespace: v.namespace}}
}
func (v *vpnSeedServer) emptyDeployment() *appsv1.Deployment {
return &appsv1.Deployment{ObjectMeta: metav1.ObjectMeta{Name: DeploymentName, Namespace: v.namespace}}
}
func (v *vpnSeedServer) emptyStatefulSet() *appsv1.StatefulSet {
return &appsv1.StatefulSet{ObjectMeta: metav1.ObjectMeta{Name: DeploymentName, Namespace: v.namespace}}
}
func (v *vpnSeedServer) emptyPodDisruptionBudget() client.Object {
pdbObjectMeta := metav1.ObjectMeta{
Name: DeploymentName,
Namespace: v.namespace,
}
if version.ConstraintK8sGreaterEqual121.Check(v.values.SeedVersion) {
return &policyv1.PodDisruptionBudget{
ObjectMeta: pdbObjectMeta,
}
}
return &policyv1beta1.PodDisruptionBudget{
ObjectMeta: pdbObjectMeta,
}
}
func (v *vpnSeedServer) emptyNetworkPolicy() *networkingv1.NetworkPolicy {
return &networkingv1.NetworkPolicy{ObjectMeta: metav1.ObjectMeta{Name: "allow-to-vpn-seed-server", Namespace: v.namespace}}
}
func (v *vpnSeedServer) emptyDestinationRule(idx *int) *networkingv1beta1.DestinationRule {
return &networkingv1beta1.DestinationRule{ObjectMeta: metav1.ObjectMeta{Name: v.indexedName(idx), Namespace: v.namespace}}
}
func (v *vpnSeedServer) emptyVPA() *vpaautoscalingv1.VerticalPodAutoscaler {
return &vpaautoscalingv1.VerticalPodAutoscaler{ObjectMeta: metav1.ObjectMeta{Name: DeploymentName + "-vpa", Namespace: v.namespace}}
}
func (v *vpnSeedServer) emptyEnvoyFilter() *networkingv1alpha3.EnvoyFilter {
var namespace = v.values.IstioIngressGateway.Namespace
if v.sniConfig != nil && v.exposureClassHandlerName != nil {
namespace = *v.sniConfig.Ingress.Namespace
}
return &networkingv1alpha3.EnvoyFilter{ObjectMeta: metav1.ObjectMeta{Name: v.namespace + "-vpn", Namespace: namespace}}