mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
synced 2025-11-01 10:48:15 +00:00
323 lines
15 KiB
Go
323 lines
15 KiB
Go
/*
|
|
Copyright 2016 The Kubernetes Authors.
|
|
|
|
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 app implements a server that runs a set of active
|
|
// components. This includes replication controllers, service endpoints and
|
|
// nodes.
|
|
package app
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
|
|
certificatesv1alpha1 "k8s.io/api/certificates/v1alpha1"
|
|
certificatesv1beta1 "k8s.io/api/certificates/v1beta1"
|
|
"k8s.io/apimachinery/pkg/api/errors"
|
|
"k8s.io/apimachinery/pkg/runtime/schema"
|
|
"k8s.io/apiserver/pkg/server/dynamiccertificates"
|
|
utilfeature "k8s.io/apiserver/pkg/util/feature"
|
|
"k8s.io/client-go/kubernetes"
|
|
"k8s.io/component-base/featuregate"
|
|
"k8s.io/controller-manager/controller"
|
|
"k8s.io/klog/v2"
|
|
"k8s.io/kubernetes/cmd/kube-controller-manager/names"
|
|
"k8s.io/kubernetes/pkg/controller/certificates/approver"
|
|
"k8s.io/kubernetes/pkg/controller/certificates/cleaner"
|
|
ctbpublisher "k8s.io/kubernetes/pkg/controller/certificates/clustertrustbundlepublisher"
|
|
"k8s.io/kubernetes/pkg/controller/certificates/rootcacertpublisher"
|
|
"k8s.io/kubernetes/pkg/controller/certificates/signer"
|
|
csrsigningconfig "k8s.io/kubernetes/pkg/controller/certificates/signer/config"
|
|
"k8s.io/kubernetes/pkg/features"
|
|
)
|
|
|
|
func newCertificateSigningRequestSigningControllerDescriptor() *ControllerDescriptor {
|
|
return &ControllerDescriptor{
|
|
name: names.CertificateSigningRequestSigningController,
|
|
aliases: []string{"csrsigning"},
|
|
initFunc: startCertificateSigningRequestSigningController,
|
|
}
|
|
}
|
|
|
|
func startCertificateSigningRequestSigningController(ctx context.Context, controllerContext ControllerContext, controllerName string) (controller.Interface, bool, error) {
|
|
logger := klog.FromContext(ctx)
|
|
missingSingleSigningFile := controllerContext.ComponentConfig.CSRSigningController.ClusterSigningCertFile == "" || controllerContext.ComponentConfig.CSRSigningController.ClusterSigningKeyFile == ""
|
|
if missingSingleSigningFile && !anySpecificFilesSet(controllerContext.ComponentConfig.CSRSigningController) {
|
|
logger.Info("Skipping CSR signer controller because no csr cert/key was specified")
|
|
return nil, false, nil
|
|
}
|
|
if !missingSingleSigningFile && anySpecificFilesSet(controllerContext.ComponentConfig.CSRSigningController) {
|
|
return nil, false, fmt.Errorf("cannot specify default and per controller certs at the same time")
|
|
}
|
|
|
|
c := controllerContext.ClientBuilder.ClientOrDie("certificate-controller")
|
|
csrInformer := controllerContext.InformerFactory.Certificates().V1().CertificateSigningRequests()
|
|
certTTL := controllerContext.ComponentConfig.CSRSigningController.ClusterSigningDuration.Duration
|
|
|
|
if kubeletServingSignerCertFile, kubeletServingSignerKeyFile := getKubeletServingSignerFiles(controllerContext.ComponentConfig.CSRSigningController); len(kubeletServingSignerCertFile) > 0 || len(kubeletServingSignerKeyFile) > 0 {
|
|
kubeletServingSigner, err := signer.NewKubeletServingCSRSigningController(ctx, c, csrInformer, kubeletServingSignerCertFile, kubeletServingSignerKeyFile, certTTL)
|
|
if err != nil {
|
|
return nil, false, fmt.Errorf("failed to start kubernetes.io/kubelet-serving certificate controller: %v", err)
|
|
}
|
|
go kubeletServingSigner.Run(ctx, 5)
|
|
} else {
|
|
logger.Info("Skipping CSR signer controller because specific files were specified for other signers and not this one", "controller", "kubernetes.io/kubelet-serving")
|
|
}
|
|
|
|
if kubeletClientSignerCertFile, kubeletClientSignerKeyFile := getKubeletClientSignerFiles(controllerContext.ComponentConfig.CSRSigningController); len(kubeletClientSignerCertFile) > 0 || len(kubeletClientSignerKeyFile) > 0 {
|
|
kubeletClientSigner, err := signer.NewKubeletClientCSRSigningController(ctx, c, csrInformer, kubeletClientSignerCertFile, kubeletClientSignerKeyFile, certTTL)
|
|
if err != nil {
|
|
return nil, false, fmt.Errorf("failed to start kubernetes.io/kube-apiserver-client-kubelet certificate controller: %v", err)
|
|
}
|
|
go kubeletClientSigner.Run(ctx, 5)
|
|
} else {
|
|
logger.Info("Skipping CSR signer controller because specific files were specified for other signers and not this one", "controller", "kubernetes.io/kube-apiserver-client-kubelet")
|
|
}
|
|
|
|
if kubeAPIServerSignerCertFile, kubeAPIServerSignerKeyFile := getKubeAPIServerClientSignerFiles(controllerContext.ComponentConfig.CSRSigningController); len(kubeAPIServerSignerCertFile) > 0 || len(kubeAPIServerSignerKeyFile) > 0 {
|
|
kubeAPIServerClientSigner, err := signer.NewKubeAPIServerClientCSRSigningController(ctx, c, csrInformer, kubeAPIServerSignerCertFile, kubeAPIServerSignerKeyFile, certTTL)
|
|
if err != nil {
|
|
return nil, false, fmt.Errorf("failed to start kubernetes.io/kube-apiserver-client certificate controller: %v", err)
|
|
}
|
|
go kubeAPIServerClientSigner.Run(ctx, 5)
|
|
} else {
|
|
logger.Info("Skipping CSR signer controller because specific files were specified for other signers and not this one", "controller", "kubernetes.io/kube-apiserver-client")
|
|
}
|
|
|
|
if legacyUnknownSignerCertFile, legacyUnknownSignerKeyFile := getLegacyUnknownSignerFiles(controllerContext.ComponentConfig.CSRSigningController); len(legacyUnknownSignerCertFile) > 0 || len(legacyUnknownSignerKeyFile) > 0 {
|
|
legacyUnknownSigner, err := signer.NewLegacyUnknownCSRSigningController(ctx, c, csrInformer, legacyUnknownSignerCertFile, legacyUnknownSignerKeyFile, certTTL)
|
|
if err != nil {
|
|
return nil, false, fmt.Errorf("failed to start kubernetes.io/legacy-unknown certificate controller: %v", err)
|
|
}
|
|
go legacyUnknownSigner.Run(ctx, 5)
|
|
} else {
|
|
logger.Info("Skipping CSR signer controller because specific files were specified for other signers and not this one", "controller", "kubernetes.io/legacy-unknown")
|
|
}
|
|
|
|
return nil, true, nil
|
|
}
|
|
|
|
func areKubeletServingSignerFilesSpecified(config csrsigningconfig.CSRSigningControllerConfiguration) bool {
|
|
// if only one is specified, it will error later during construction
|
|
return len(config.KubeletServingSignerConfiguration.CertFile) > 0 || len(config.KubeletServingSignerConfiguration.KeyFile) > 0
|
|
}
|
|
func areKubeletClientSignerFilesSpecified(config csrsigningconfig.CSRSigningControllerConfiguration) bool {
|
|
// if only one is specified, it will error later during construction
|
|
return len(config.KubeletClientSignerConfiguration.CertFile) > 0 || len(config.KubeletClientSignerConfiguration.KeyFile) > 0
|
|
}
|
|
|
|
func areKubeAPIServerClientSignerFilesSpecified(config csrsigningconfig.CSRSigningControllerConfiguration) bool {
|
|
// if only one is specified, it will error later during construction
|
|
return len(config.KubeAPIServerClientSignerConfiguration.CertFile) > 0 || len(config.KubeAPIServerClientSignerConfiguration.KeyFile) > 0
|
|
}
|
|
|
|
func areLegacyUnknownSignerFilesSpecified(config csrsigningconfig.CSRSigningControllerConfiguration) bool {
|
|
// if only one is specified, it will error later during construction
|
|
return len(config.LegacyUnknownSignerConfiguration.CertFile) > 0 || len(config.LegacyUnknownSignerConfiguration.KeyFile) > 0
|
|
}
|
|
|
|
func anySpecificFilesSet(config csrsigningconfig.CSRSigningControllerConfiguration) bool {
|
|
return areKubeletServingSignerFilesSpecified(config) ||
|
|
areKubeletClientSignerFilesSpecified(config) ||
|
|
areKubeAPIServerClientSignerFilesSpecified(config) ||
|
|
areLegacyUnknownSignerFilesSpecified(config)
|
|
}
|
|
|
|
func getKubeletServingSignerFiles(config csrsigningconfig.CSRSigningControllerConfiguration) (string, string) {
|
|
// if any cert/key is set for specific CSR signing loops, then the --cluster-signing-{cert,key}-file are not used for any CSR signing loop.
|
|
if anySpecificFilesSet(config) {
|
|
return config.KubeletServingSignerConfiguration.CertFile, config.KubeletServingSignerConfiguration.KeyFile
|
|
}
|
|
return config.ClusterSigningCertFile, config.ClusterSigningKeyFile
|
|
}
|
|
|
|
func getKubeletClientSignerFiles(config csrsigningconfig.CSRSigningControllerConfiguration) (string, string) {
|
|
// if any cert/key is set for specific CSR signing loops, then the --cluster-signing-{cert,key}-file are not used for any CSR signing loop.
|
|
if anySpecificFilesSet(config) {
|
|
return config.KubeletClientSignerConfiguration.CertFile, config.KubeletClientSignerConfiguration.KeyFile
|
|
}
|
|
return config.ClusterSigningCertFile, config.ClusterSigningKeyFile
|
|
}
|
|
|
|
func getKubeAPIServerClientSignerFiles(config csrsigningconfig.CSRSigningControllerConfiguration) (string, string) {
|
|
// if any cert/key is set for specific CSR signing loops, then the --cluster-signing-{cert,key}-file are not used for any CSR signing loop.
|
|
if anySpecificFilesSet(config) {
|
|
return config.KubeAPIServerClientSignerConfiguration.CertFile, config.KubeAPIServerClientSignerConfiguration.KeyFile
|
|
}
|
|
return config.ClusterSigningCertFile, config.ClusterSigningKeyFile
|
|
}
|
|
|
|
func getLegacyUnknownSignerFiles(config csrsigningconfig.CSRSigningControllerConfiguration) (string, string) {
|
|
// if any cert/key is set for specific CSR signing loops, then the --cluster-signing-{cert,key}-file are not used for any CSR signing loop.
|
|
if anySpecificFilesSet(config) {
|
|
return config.LegacyUnknownSignerConfiguration.CertFile, config.LegacyUnknownSignerConfiguration.KeyFile
|
|
}
|
|
return config.ClusterSigningCertFile, config.ClusterSigningKeyFile
|
|
}
|
|
|
|
func newCertificateSigningRequestApprovingControllerDescriptor() *ControllerDescriptor {
|
|
return &ControllerDescriptor{
|
|
name: names.CertificateSigningRequestApprovingController,
|
|
aliases: []string{"csrapproving"},
|
|
initFunc: startCertificateSigningRequestApprovingController,
|
|
}
|
|
}
|
|
func startCertificateSigningRequestApprovingController(ctx context.Context, controllerContext ControllerContext, controllerName string) (controller.Interface, bool, error) {
|
|
approver := approver.NewCSRApprovingController(
|
|
ctx,
|
|
controllerContext.ClientBuilder.ClientOrDie("certificate-controller"),
|
|
controllerContext.InformerFactory.Certificates().V1().CertificateSigningRequests(),
|
|
)
|
|
go approver.Run(ctx, 5)
|
|
|
|
return nil, true, nil
|
|
}
|
|
|
|
func newCertificateSigningRequestCleanerControllerDescriptor() *ControllerDescriptor {
|
|
return &ControllerDescriptor{
|
|
name: names.CertificateSigningRequestCleanerController,
|
|
aliases: []string{"csrcleaner"},
|
|
initFunc: startCertificateSigningRequestCleanerController,
|
|
}
|
|
}
|
|
func startCertificateSigningRequestCleanerController(ctx context.Context, controllerContext ControllerContext, controllerName string) (controller.Interface, bool, error) {
|
|
cleaner := cleaner.NewCSRCleanerController(
|
|
controllerContext.ClientBuilder.ClientOrDie("certificate-controller").CertificatesV1().CertificateSigningRequests(),
|
|
controllerContext.InformerFactory.Certificates().V1().CertificateSigningRequests(),
|
|
)
|
|
go cleaner.Run(ctx, 1)
|
|
return nil, true, nil
|
|
}
|
|
|
|
func newRootCACertificatePublisherControllerDescriptor() *ControllerDescriptor {
|
|
return &ControllerDescriptor{
|
|
name: names.RootCACertificatePublisherController,
|
|
aliases: []string{"root-ca-cert-publisher"},
|
|
initFunc: startRootCACertificatePublisherController,
|
|
}
|
|
}
|
|
|
|
func startRootCACertificatePublisherController(ctx context.Context, controllerContext ControllerContext, controllerName string) (controller.Interface, bool, error) {
|
|
rootCA, err := getKubeAPIServerCAFileContents(controllerContext)
|
|
if err != nil {
|
|
return nil, true, err
|
|
}
|
|
|
|
sac, err := rootcacertpublisher.NewPublisher(
|
|
controllerContext.InformerFactory.Core().V1().ConfigMaps(),
|
|
controllerContext.InformerFactory.Core().V1().Namespaces(),
|
|
controllerContext.ClientBuilder.ClientOrDie("root-ca-cert-publisher"),
|
|
rootCA,
|
|
)
|
|
if err != nil {
|
|
return nil, true, fmt.Errorf("error creating root CA certificate publisher: %v", err)
|
|
}
|
|
go sac.Run(ctx, 1)
|
|
return nil, true, nil
|
|
}
|
|
|
|
func newKubeAPIServerSignerClusterTrustBundledPublisherDescriptor() *ControllerDescriptor {
|
|
return &ControllerDescriptor{
|
|
name: names.KubeAPIServerClusterTrustBundlePublisherController,
|
|
initFunc: newKubeAPIServerSignerClusterTrustBundledPublisherController,
|
|
requiredFeatureGates: []featuregate.Feature{features.ClusterTrustBundle},
|
|
}
|
|
}
|
|
|
|
type controllerConstructor func(string, dynamiccertificates.CAContentProvider, kubernetes.Interface) (ctbpublisher.PublisherRunner, error)
|
|
|
|
func newKubeAPIServerSignerClusterTrustBundledPublisherController(ctx context.Context, controllerContext ControllerContext, controllerName string) (controller.Interface, bool, error) {
|
|
rootCA, err := getKubeAPIServerCAFileContents(controllerContext)
|
|
if err != nil {
|
|
return nil, false, err
|
|
}
|
|
|
|
if len(rootCA) == 0 || !utilfeature.DefaultFeatureGate.Enabled(features.ClusterTrustBundle) {
|
|
return nil, false, nil
|
|
}
|
|
|
|
servingSigners, err := dynamiccertificates.NewStaticCAContent("kube-apiserver-serving", rootCA)
|
|
if err != nil {
|
|
return nil, false, fmt.Errorf("failed to create a static CA content provider for the kube-apiserver-serving signer: %w", err)
|
|
}
|
|
|
|
schemaControllerMapping := map[schema.GroupVersion]controllerConstructor{
|
|
certificatesv1alpha1.SchemeGroupVersion: ctbpublisher.NewAlphaClusterTrustBundlePublisher,
|
|
certificatesv1beta1.SchemeGroupVersion: ctbpublisher.NewBetaClusterTrustBundlePublisher,
|
|
}
|
|
|
|
apiserverSignerClient := controllerContext.ClientBuilder.ClientOrDie("kube-apiserver-serving-clustertrustbundle-publisher")
|
|
var runner ctbpublisher.PublisherRunner
|
|
for _, gv := range []schema.GroupVersion{certificatesv1beta1.SchemeGroupVersion, certificatesv1alpha1.SchemeGroupVersion} {
|
|
ctbAvailable, err := clusterTrustBundlesAvailable(apiserverSignerClient, gv)
|
|
if err != nil {
|
|
return nil, false, fmt.Errorf("discovery failed for ClusterTrustBundle: %w", err)
|
|
}
|
|
|
|
if !ctbAvailable {
|
|
continue
|
|
}
|
|
|
|
runner, err = schemaControllerMapping[gv](
|
|
"kubernetes.io/kube-apiserver-serving",
|
|
servingSigners,
|
|
apiserverSignerClient,
|
|
)
|
|
if err != nil {
|
|
return nil, false, fmt.Errorf("error creating kube-apiserver-serving signer certificates publisher: %w", err)
|
|
}
|
|
break
|
|
}
|
|
|
|
if runner == nil {
|
|
klog.Info("no known scheme version was found for clustertrustbundles, cannot start kube-apiserver-serving-clustertrustbundle-publisher-controller")
|
|
return nil, false, nil
|
|
}
|
|
|
|
go runner.Run(ctx)
|
|
return nil, true, nil
|
|
}
|
|
|
|
func clusterTrustBundlesAvailable(client kubernetes.Interface, schemaVersion schema.GroupVersion) (bool, error) {
|
|
resList, err := client.Discovery().ServerResourcesForGroupVersion(schemaVersion.String())
|
|
if errors.IsNotFound(err) {
|
|
return false, nil
|
|
}
|
|
|
|
if resList != nil {
|
|
// even in case of an error above there might be a partial list for APIs that
|
|
// were already successfully discovered
|
|
for _, r := range resList.APIResources {
|
|
if r.Name == "clustertrustbundles" {
|
|
return true, nil
|
|
}
|
|
}
|
|
}
|
|
return false, err
|
|
}
|
|
|
|
func getKubeAPIServerCAFileContents(controllerContext ControllerContext) ([]byte, error) {
|
|
if controllerContext.ComponentConfig.SAController.RootCAFile == "" {
|
|
return controllerContext.ClientBuilder.ConfigOrDie("root-ca-cert-publisher").CAData, nil
|
|
}
|
|
|
|
rootCA, err := readCA(controllerContext.ComponentConfig.SAController.RootCAFile)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error parsing root-ca-file at %s: %w", controllerContext.ComponentConfig.SAController.RootCAFile, err)
|
|
}
|
|
return rootCA, nil
|
|
|
|
}
|