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main.go
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main.go
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/*
* MIT License
*
* Copyright (c) since 2021, flomesh.io Authors.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package main
import (
"context"
"flag"
"fmt"
"github.com/flomesh-io/fsm-classic/pkg/commons"
"github.com/flomesh-io/fsm-classic/pkg/config"
"github.com/flomesh-io/fsm-classic/pkg/event"
"github.com/flomesh-io/fsm-classic/pkg/kube"
"github.com/flomesh-io/fsm-classic/pkg/repo"
"github.com/flomesh-io/fsm-classic/pkg/util"
"github.com/flomesh-io/fsm-classic/pkg/util/tls"
"github.com/flomesh-io/fsm-classic/pkg/version"
"github.com/spf13/pflag"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/rest"
"k8s.io/klog/v2"
"k8s.io/klog/v2/klogr"
"math/rand"
"os"
"sigs.k8s.io/controller-runtime/pkg/manager"
"time"
// Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.)
// to ensure that exec-entrypoint and run can make use of them.
_ "k8s.io/client-go/plugin/pkg/client/auth"
flomeshscheme "github.com/flomesh-io/fsm-classic/pkg/generated/clientset/versioned/scheme"
"github.com/go-co-op/gocron"
"k8s.io/apimachinery/pkg/runtime"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
clientgoscheme "k8s.io/client-go/kubernetes/scheme"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/healthz"
gwschema "sigs.k8s.io/gateway-api/pkg/client/clientset/versioned/scheme"
//+kubebuilder:scaffold:imports
)
var (
scheme = runtime.NewScheme()
//setupLog = ctrl.Log.WithName("setup")
)
func init() {
utilruntime.Must(clientgoscheme.AddToScheme(scheme))
utilruntime.Must(flomeshscheme.AddToScheme(scheme))
utilruntime.Must(gwschema.AddToScheme(scheme))
//+kubebuilder:scaffold:scheme
}
type startArgs struct {
managerConfigFile string
namespace string
}
func main() {
// process CLI arguments and parse them to flags
args := processFlags()
options := loadManagerOptions(args.managerConfigFile)
klog.Infof(commons.AppVersionTemplate, version.Version, version.ImageVersion, version.GitVersion, version.GitCommit, version.BuildDate)
kubeconfig := ctrl.GetConfigOrDie()
k8sApi := newK8sAPI(kubeconfig, args)
if !version.IsSupportedK8sVersion(k8sApi) {
klog.Error(fmt.Errorf("kubernetes server version %s is not supported, requires at least %s",
version.ServerVersion.String(), version.MinK8sVersion.String()))
os.Exit(1)
}
// fsm configurations
controlPlaneConfigStore := config.NewStore(k8sApi)
mcClient := controlPlaneConfigStore.MeshConfig
mc := mcClient.GetConfig()
mc.Cluster.UID = getClusterUID(k8sApi, mc)
mc, err := mcClient.UpdateConfig(mc)
if err != nil {
os.Exit(1)
}
// generate certificate and store it in k8s secret flomesh-ca-bundle
certMgr, err := tls.GetCertificateManager(k8sApi, mc)
if err != nil {
os.Exit(1)
}
// upload init scripts to pipy repo
repoClient := repo.NewRepoClient(mc.RepoRootURL())
initRepo(repoClient)
// setup HTTP
setupHTTP(repoClient, mc)
// setup TLS config
setupTLS(certMgr, repoClient, mc)
// setup Logging
setupLogging(k8sApi, repoClient, mc)
// create a new manager for controllers
mgr := newManager(kubeconfig, options)
stopCh := util.RegisterOSExitHandlers()
broker := event.NewBroker(stopCh)
// create mutating and validating webhook configurations
createWebhookConfigurations(k8sApi, controlPlaneConfigStore, certMgr)
// register webhooks
registerToWebhookServer(mgr, k8sApi, controlPlaneConfigStore)
// register Reconcilers
registerReconcilers(mgr, k8sApi, controlPlaneConfigStore, certMgr, broker)
registerEventHandler(mgr, k8sApi, controlPlaneConfigStore, certMgr, repoClient)
// add endpoints for Liveness and Readiness check
addLivenessAndReadinessCheck(mgr)
//+kubebuilder:scaffold:builder
// start the controller manager
startManager(mgr, mc, repoClient)
}
func processFlags() *startArgs {
var configFile string
flag.StringVar(&configFile, "config", "manager_config.yaml",
"The controller will load its initial configuration from this file. "+
"Omit this flag to use the default configuration values. "+
"Command-line flags override configuration from this file.")
klog.InitFlags(nil)
pflag.CommandLine.AddGoFlagSet(flag.CommandLine)
pflag.Parse()
rand.Seed(time.Now().UnixNano())
ctrl.SetLogger(klogr.New())
return &startArgs{
managerConfigFile: configFile,
namespace: config.GetFsmNamespace(),
}
}
func loadManagerOptions(configFile string) ctrl.Options {
var err error
options := ctrl.Options{Scheme: scheme}
if configFile != "" {
options, err = options.AndFrom(ctrl.ConfigFile().AtPath(configFile))
if err != nil {
klog.Error(err, "unable to load the config file")
os.Exit(1)
}
}
return options
}
func newManager(kubeconfig *rest.Config, options ctrl.Options) manager.Manager {
mgr, err := ctrl.NewManager(kubeconfig, options)
if err != nil {
klog.Error(err, "unable to create manager")
os.Exit(1)
}
return mgr
}
func newK8sAPI(kubeconfig *rest.Config, args *startArgs) *kube.K8sAPI {
api, err := kube.NewAPIForConfig(kubeconfig, 30*time.Second)
if err != nil {
klog.Error(err, "unable to create k8s client")
os.Exit(1)
}
return api
}
func getClusterUID(api *kube.K8sAPI, mc *config.MeshConfig) string {
ns, err := api.Client.CoreV1().Namespaces().Get(context.TODO(), mc.GetMeshNamespace(), metav1.GetOptions{})
if err != nil {
klog.Errorf("Failed to get fsm namespace: %s", err)
os.Exit(1)
}
return string(ns.UID)
}
func addLivenessAndReadinessCheck(mgr manager.Manager) {
if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil {
klog.Error(err, "unable to set up health check")
os.Exit(1)
}
if err := mgr.AddReadyzCheck("readyz", healthz.Ping); err != nil {
klog.Error(err, "unable to set up ready check")
os.Exit(1)
}
}
func startManager(mgr manager.Manager, mc *config.MeshConfig, repoClient *repo.PipyRepoClient) {
klog.V(5).Infof("===> RepoRecoverIntervalInSeconds: %d", mc.Repo.RecoverIntervalInSeconds)
s := gocron.NewScheduler(time.Local)
s.SingletonModeAll()
if _, err := s.Every(30).Seconds().
Name("rebuild-repo").
Do(rebuildRepoJob, repoClient, mgr.GetClient(), mc); err != nil {
klog.Errorf("Error happened while rebuilding repo: %s", err)
}
s.RegisterEventListeners(
gocron.AfterJobRuns(func(jobName string) {
klog.Infof(">>>>>> afterJobRuns: %s\n", jobName)
}),
gocron.BeforeJobRuns(func(jobName string) {
klog.Infof(">>>>>> beforeJobRuns: %s\n", jobName)
}),
gocron.WhenJobReturnsError(func(jobName string, err error) {
klog.Errorf(">>>>>> whenJobReturnsError: %s, %v\n", jobName, err)
}),
)
s.StartAsync()
klog.Info("starting manager")
if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
klog.Fatalf("problem running manager, %s", err.Error())
os.Exit(1)
}
}