108 lines
3.6 KiB
Go
108 lines
3.6 KiB
Go
/*
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Copyright 2020 The Jetstack cert-manager contributors.
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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
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import (
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"context"
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"flag"
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"fmt"
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"github.com/spf13/cobra"
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"k8s.io/client-go/tools/clientcmd"
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"github.com/jetstack/cert-manager/cmd/webhook/app/options"
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"github.com/jetstack/cert-manager/pkg/logs"
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logf "github.com/jetstack/cert-manager/pkg/logs"
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"github.com/jetstack/cert-manager/pkg/util"
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"github.com/jetstack/cert-manager/pkg/webhook"
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"github.com/jetstack/cert-manager/pkg/webhook/authority"
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"github.com/jetstack/cert-manager/pkg/webhook/handlers"
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"github.com/jetstack/cert-manager/pkg/webhook/server"
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"github.com/jetstack/cert-manager/pkg/webhook/server/tls"
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)
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var validationHook handlers.ValidatingAdmissionHook = handlers.NewRegistryBackedValidator(logs.Log, webhook.Scheme, webhook.ValidationRegistry)
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var mutationHook handlers.MutatingAdmissionHook = handlers.NewSchemeBackedDefaulter(logs.Log, webhook.Scheme)
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var conversionHook handlers.ConversionHook = handlers.NewSchemeBackedConverter(logs.Log, webhook.Scheme)
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func RunServer(opts options.WebhookOptions, stopCh <-chan struct{}) error {
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rootCtx := util.ContextWithStopCh(context.Background(), stopCh)
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rootCtx = logf.NewContext(rootCtx, nil, "webhook")
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log := logf.FromContext(rootCtx)
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var source tls.CertificateSource
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switch {
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case options.FileTLSSourceEnabled(opts):
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log.Info("using TLS certificate from local filesystem", "private_key_path", opts.TLSKeyFile, "certificate", opts.TLSCertFile)
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source = &tls.FileCertificateSource{
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CertPath: opts.TLSCertFile,
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KeyPath: opts.TLSKeyFile,
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Log: log,
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}
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case options.DynamicTLSSourceEnabled(opts):
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restcfg, err := clientcmd.BuildConfigFromFlags("", opts.Kubeconfig)
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if err != nil {
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return err
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}
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log.Info("using dynamic certificate generating using CA stored in Secret resource", "secret_namespace", opts.DynamicServingCASecretNamespace, "secret_name", opts.DynamicServingCASecretName)
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source = &tls.DynamicSource{
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DNSNames: opts.DynamicServingDNSNames,
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Authority: &authority.DynamicAuthority{
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SecretNamespace: opts.DynamicServingCASecretNamespace,
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SecretName: opts.DynamicServingCASecretName,
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RESTConfig: restcfg,
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Log: log,
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},
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Log: log,
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}
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default:
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log.Info("warning: serving insecurely as tls certificate data not provided")
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}
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srv := &server.Server{
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ListenAddr: fmt.Sprintf(":%d", opts.ListenPort),
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HealthzAddr: fmt.Sprintf(":%d", opts.HealthzPort),
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EnablePprof: true,
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CertificateSource: source,
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CipherSuites: opts.TLSCipherSuites,
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MinTLSVersion: opts.MinTLSVersion,
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ValidationWebhook: validationHook,
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MutationWebhook: mutationHook,
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ConversionWebhook: conversionHook,
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Log: log,
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}
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return srv.Run(stopCh)
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}
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func NewServerCommand(stopCh <-chan struct{}) *cobra.Command {
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opts := options.WebhookOptions{}
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cmd := &cobra.Command{
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Use: "cert-manager-webhook",
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Short: fmt.Sprintf("Webhook for automated TLS controller for Kubernetes (%s) (%s)", util.AppVersion, util.AppGitCommit),
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RunE: func(cmd *cobra.Command, args []string) error {
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return RunServer(opts, stopCh)
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},
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}
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cmd.Flags().AddGoFlagSet(flag.CommandLine)
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return cmd
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}
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