mirror of
https://github.com/k3s-io/k3s.git
synced 2024-06-07 19:41:36 +00:00
224 lines
11 KiB
Go
224 lines
11 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 (
|
|
"fmt"
|
|
"net/http"
|
|
|
|
"k8s.io/apimachinery/pkg/runtime/schema"
|
|
utilfeature "k8s.io/apiserver/pkg/util/feature"
|
|
"k8s.io/klog/v2"
|
|
"k8s.io/kubernetes/pkg/controller/certificates/approver"
|
|
"k8s.io/kubernetes/pkg/controller/certificates/cleaner"
|
|
"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 startCSRSigningController(ctx ControllerContext) (http.Handler, bool, error) {
|
|
gvr := schema.GroupVersionResource{Group: "certificates.k8s.io", Version: "v1", Resource: "certificatesigningrequests"}
|
|
if !ctx.AvailableResources[gvr] {
|
|
klog.Warningf("Resource %s is not available now", gvr.String())
|
|
return nil, false, nil
|
|
}
|
|
missingSingleSigningFile := ctx.ComponentConfig.CSRSigningController.ClusterSigningCertFile == "" || ctx.ComponentConfig.CSRSigningController.ClusterSigningKeyFile == ""
|
|
if missingSingleSigningFile && !anySpecificFilesSet(ctx.ComponentConfig.CSRSigningController) {
|
|
klog.V(2).Info("skipping CSR signer controller because no csr cert/key was specified")
|
|
return nil, false, nil
|
|
}
|
|
if !missingSingleSigningFile && anySpecificFilesSet(ctx.ComponentConfig.CSRSigningController) {
|
|
return nil, false, fmt.Errorf("cannot specify default and per controller certs at the same time")
|
|
}
|
|
|
|
c := ctx.ClientBuilder.ClientOrDie("certificate-controller")
|
|
csrInformer := ctx.InformerFactory.Certificates().V1().CertificateSigningRequests()
|
|
certTTL := ctx.ComponentConfig.CSRSigningController.ClusterSigningDuration.Duration
|
|
|
|
if kubeletServingSignerCertFile, kubeletServingSignerKeyFile := getKubeletServingSignerFiles(ctx.ComponentConfig.CSRSigningController); len(kubeletServingSignerCertFile) > 0 || len(kubeletServingSignerKeyFile) > 0 {
|
|
kubeletServingSigner, err := signer.NewKubeletServingCSRSigningController(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(1, ctx.Stop)
|
|
} else {
|
|
klog.V(2).Infof("skipping CSR signer controller %q because specific files were specified for other signers and not this one.", "kubernetes.io/kubelet-serving")
|
|
}
|
|
|
|
if kubeletClientSignerCertFile, kubeletClientSignerKeyFile := getKubeletClientSignerFiles(ctx.ComponentConfig.CSRSigningController); len(kubeletClientSignerCertFile) > 0 || len(kubeletClientSignerKeyFile) > 0 {
|
|
kubeletClientSigner, err := signer.NewKubeletClientCSRSigningController(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(1, ctx.Stop)
|
|
} else {
|
|
klog.V(2).Infof("skipping CSR signer controller %q because specific files were specified for other signers and not this one.", "kubernetes.io/kube-apiserver-client-kubelet")
|
|
}
|
|
|
|
if kubeAPIServerSignerCertFile, kubeAPIServerSignerKeyFile := getKubeAPIServerClientSignerFiles(ctx.ComponentConfig.CSRSigningController); len(kubeAPIServerSignerCertFile) > 0 || len(kubeAPIServerSignerKeyFile) > 0 {
|
|
kubeAPIServerClientSigner, err := signer.NewKubeAPIServerClientCSRSigningController(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(1, ctx.Stop)
|
|
} else {
|
|
klog.V(2).Infof("skipping CSR signer controller %q because specific files were specified for other signers and not this one.", "kubernetes.io/kube-apiserver-client")
|
|
}
|
|
|
|
if legacyUnknownSignerCertFile, legacyUnknownSignerKeyFile := getLegacyUnknownSignerFiles(ctx.ComponentConfig.CSRSigningController); len(legacyUnknownSignerCertFile) > 0 || len(legacyUnknownSignerKeyFile) > 0 {
|
|
legacyUnknownSigner, err := signer.NewLegacyUnknownCSRSigningController(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(1, ctx.Stop)
|
|
} else {
|
|
klog.V(2).Infof("skipping CSR signer controller %q because specific files were specified for other signers and not this one.", "kubernetes.io/legacy-unknown")
|
|
}
|
|
|
|
return nil, true, nil
|
|
}
|
|
|
|
func areKubeletServingSignerFilesSpecified(config csrsigningconfig.CSRSigningControllerConfiguration) bool {
|
|
if len(config.KubeletServingSignerConfiguration.CertFile) > 0 || len(config.KubeletServingSignerConfiguration.KeyFile) > 0 {
|
|
// if only one is specified, it will error later during construction
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
func areKubeletClientSignerFilesSpecified(config csrsigningconfig.CSRSigningControllerConfiguration) bool {
|
|
if len(config.KubeletClientSignerConfiguration.CertFile) > 0 || len(config.KubeletClientSignerConfiguration.KeyFile) > 0 {
|
|
// if only one is specified, it will error later during construction
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
func areKubeAPIServerClientSignerFilesSpecified(config csrsigningconfig.CSRSigningControllerConfiguration) bool {
|
|
if len(config.KubeAPIServerClientSignerConfiguration.CertFile) > 0 || len(config.KubeAPIServerClientSignerConfiguration.KeyFile) > 0 {
|
|
// if only one is specified, it will error later during construction
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
func areLegacyUnknownSignerFilesSpecified(config csrsigningconfig.CSRSigningControllerConfiguration) bool {
|
|
if len(config.LegacyUnknownSignerConfiguration.CertFile) > 0 || len(config.LegacyUnknownSignerConfiguration.KeyFile) > 0 {
|
|
// if only one is specified, it will error later during construction
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
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 startCSRApprovingController(ctx ControllerContext) (http.Handler, bool, error) {
|
|
gvr := schema.GroupVersionResource{Group: "certificates.k8s.io", Version: "v1", Resource: "certificatesigningrequests"}
|
|
if !ctx.AvailableResources[gvr] {
|
|
klog.Warningf("Resource %s is not available now", gvr.String())
|
|
return nil, false, nil
|
|
}
|
|
|
|
approver := approver.NewCSRApprovingController(
|
|
ctx.ClientBuilder.ClientOrDie("certificate-controller"),
|
|
ctx.InformerFactory.Certificates().V1().CertificateSigningRequests(),
|
|
)
|
|
go approver.Run(1, ctx.Stop)
|
|
|
|
return nil, true, nil
|
|
}
|
|
|
|
func startCSRCleanerController(ctx ControllerContext) (http.Handler, bool, error) {
|
|
cleaner := cleaner.NewCSRCleanerController(
|
|
ctx.ClientBuilder.ClientOrDie("certificate-controller").CertificatesV1().CertificateSigningRequests(),
|
|
ctx.InformerFactory.Certificates().V1().CertificateSigningRequests(),
|
|
)
|
|
go cleaner.Run(1, ctx.Stop)
|
|
return nil, true, nil
|
|
}
|
|
|
|
func startRootCACertPublisher(ctx ControllerContext) (http.Handler, bool, error) {
|
|
if !utilfeature.DefaultFeatureGate.Enabled(features.BoundServiceAccountTokenVolume) {
|
|
return nil, false, nil
|
|
}
|
|
|
|
var (
|
|
rootCA []byte
|
|
err error
|
|
)
|
|
if ctx.ComponentConfig.SAController.RootCAFile != "" {
|
|
if rootCA, err = readCA(ctx.ComponentConfig.SAController.RootCAFile); err != nil {
|
|
return nil, true, fmt.Errorf("error parsing root-ca-file at %s: %v", ctx.ComponentConfig.SAController.RootCAFile, err)
|
|
}
|
|
} else {
|
|
rootCA = ctx.ClientBuilder.ConfigOrDie("root-ca-cert-publisher").CAData
|
|
}
|
|
|
|
sac, err := rootcacertpublisher.NewPublisher(
|
|
ctx.InformerFactory.Core().V1().ConfigMaps(),
|
|
ctx.InformerFactory.Core().V1().Namespaces(),
|
|
ctx.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(1, ctx.Stop)
|
|
return nil, true, nil
|
|
}
|