mirror of https://github.com/k3s-io/k3s
156 lines
5.7 KiB
Go
156 lines
5.7 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Package app implements a server that runs a set of active
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// components. This includes replication controllers, service endpoints and
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// nodes.
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//
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package app
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import (
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"fmt"
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"os"
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"k8s.io/klog"
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"net/http"
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"k8s.io/apimachinery/pkg/runtime/schema"
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utilfeature "k8s.io/apiserver/pkg/util/feature"
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kubeoptions "k8s.io/kubernetes/cmd/kube-controller-manager/app/options"
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"k8s.io/kubernetes/pkg/controller/certificates/approver"
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"k8s.io/kubernetes/pkg/controller/certificates/cleaner"
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"k8s.io/kubernetes/pkg/controller/certificates/rootcacertpublisher"
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"k8s.io/kubernetes/pkg/controller/certificates/signer"
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"k8s.io/kubernetes/pkg/features"
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)
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func startCSRSigningController(ctx ControllerContext) (http.Handler, bool, error) {
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if !ctx.AvailableResources[schema.GroupVersionResource{Group: "certificates.k8s.io", Version: "v1beta1", Resource: "certificatesigningrequests"}] {
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return nil, false, nil
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}
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if ctx.ComponentConfig.CSRSigningController.ClusterSigningCertFile == "" || ctx.ComponentConfig.CSRSigningController.ClusterSigningKeyFile == "" {
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return nil, false, nil
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}
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// Deprecation warning for old defaults.
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//
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// * If the signing cert and key are the default paths but the files
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// exist, warn that the paths need to be specified explicitly in a
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// later release and the defaults will be removed. We don't expect this
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// to be the case.
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//
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// * If the signing cert and key are default paths but the files don't exist,
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// bail out of startController without logging.
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var keyFileExists, keyUsesDefault, certFileExists, certUsesDefault bool
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_, err := os.Stat(ctx.ComponentConfig.CSRSigningController.ClusterSigningCertFile)
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certFileExists = !os.IsNotExist(err)
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certUsesDefault = (ctx.ComponentConfig.CSRSigningController.ClusterSigningCertFile == kubeoptions.DefaultClusterSigningCertFile)
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_, err = os.Stat(ctx.ComponentConfig.CSRSigningController.ClusterSigningKeyFile)
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keyFileExists = !os.IsNotExist(err)
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keyUsesDefault = (ctx.ComponentConfig.CSRSigningController.ClusterSigningKeyFile == kubeoptions.DefaultClusterSigningKeyFile)
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switch {
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case (keyFileExists && keyUsesDefault) || (certFileExists && certUsesDefault):
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klog.Warningf("You might be using flag defaulting for --cluster-signing-cert-file and" +
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" --cluster-signing-key-file. These defaults are deprecated and will be removed" +
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" in a subsequent release. Please pass these options explicitly.")
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case (!keyFileExists && keyUsesDefault) && (!certFileExists && certUsesDefault):
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// This is what we expect right now if people aren't
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// setting up the signing controller. This isn't
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// actually a problem since the signer is not a
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// required controller.
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return nil, false, nil
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default:
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// Note that '!filesExist && !usesDefaults' is obviously
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// operator error. We don't handle this case here and instead
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// allow it to be handled by NewCSR... below.
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}
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c := ctx.ClientBuilder.ClientOrDie("certificate-controller")
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signer, err := signer.NewCSRSigningController(
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c,
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ctx.InformerFactory.Certificates().V1beta1().CertificateSigningRequests(),
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ctx.ComponentConfig.CSRSigningController.ClusterSigningCertFile,
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ctx.ComponentConfig.CSRSigningController.ClusterSigningKeyFile,
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ctx.ComponentConfig.CSRSigningController.ClusterSigningDuration.Duration,
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)
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if err != nil {
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return nil, false, fmt.Errorf("failed to start certificate controller: %v", err)
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}
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go signer.Run(1, ctx.Stop)
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return nil, true, nil
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}
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func startCSRApprovingController(ctx ControllerContext) (http.Handler, bool, error) {
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if !ctx.AvailableResources[schema.GroupVersionResource{Group: "certificates.k8s.io", Version: "v1beta1", Resource: "certificatesigningrequests"}] {
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return nil, false, nil
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}
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approver := approver.NewCSRApprovingController(
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ctx.ClientBuilder.ClientOrDie("certificate-controller"),
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ctx.InformerFactory.Certificates().V1beta1().CertificateSigningRequests(),
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)
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go approver.Run(1, ctx.Stop)
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return nil, true, nil
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}
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func startCSRCleanerController(ctx ControllerContext) (http.Handler, bool, error) {
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cleaner := cleaner.NewCSRCleanerController(
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ctx.ClientBuilder.ClientOrDie("certificate-controller").CertificatesV1beta1().CertificateSigningRequests(),
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ctx.InformerFactory.Certificates().V1beta1().CertificateSigningRequests(),
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)
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go cleaner.Run(1, ctx.Stop)
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return nil, true, nil
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}
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func startRootCACertPublisher(ctx ControllerContext) (http.Handler, bool, error) {
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if !utilfeature.DefaultFeatureGate.Enabled(features.BoundServiceAccountTokenVolume) {
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return nil, false, nil
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}
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var (
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rootCA []byte
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err error
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)
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if ctx.ComponentConfig.SAController.RootCAFile != "" {
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if rootCA, err = readCA(ctx.ComponentConfig.SAController.RootCAFile); err != nil {
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return nil, true, fmt.Errorf("error parsing root-ca-file at %s: %v", ctx.ComponentConfig.SAController.RootCAFile, err)
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}
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} else {
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rootCA = ctx.ClientBuilder.ConfigOrDie("root-ca-cert-publisher").CAData
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}
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sac, err := rootcacertpublisher.NewPublisher(
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ctx.InformerFactory.Core().V1().ConfigMaps(),
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ctx.InformerFactory.Core().V1().Namespaces(),
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ctx.ClientBuilder.ClientOrDie("root-ca-cert-publisher"),
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rootCA,
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)
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if err != nil {
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return nil, true, fmt.Errorf("error creating root CA certificate publisher: %v", err)
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}
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go sac.Run(1, ctx.Stop)
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return nil, true, nil
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}
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