terway-controlplane.go

/*
Copyright 2021-2022 Terway 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 main

import (
	"flag"
	"math/rand"
	"os"
	"time"

	apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
	"k8s.io/apimachinery/pkg/runtime"
	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
	"k8s.io/client-go/util/flowcontrol"
	"k8s.io/klog/v2"
	"k8s.io/klog/v2/klogr"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/client"
	"sigs.k8s.io/controller-runtime/pkg/healthz"
	"sigs.k8s.io/controller-runtime/pkg/metrics"
	wh "sigs.k8s.io/controller-runtime/pkg/webhook"

	aliyun "github.com/AliyunContainerService/terway/pkg/aliyun/client"
	"github.com/AliyunContainerService/terway/pkg/aliyun/credential"
	"github.com/AliyunContainerService/terway/pkg/apis/crds"
	networkv1beta1 "github.com/AliyunContainerService/terway/pkg/apis/network.alibabacloud.com/v1beta1"
	"github.com/AliyunContainerService/terway/pkg/backoff"
	"github.com/AliyunContainerService/terway/pkg/cert"
	register "github.com/AliyunContainerService/terway/pkg/controller"
	_ "github.com/AliyunContainerService/terway/pkg/controller/all"
	"github.com/AliyunContainerService/terway/pkg/controller/webhook"
	"github.com/AliyunContainerService/terway/pkg/metric"
	"github.com/AliyunContainerService/terway/pkg/utils"
	"github.com/AliyunContainerService/terway/pkg/utils/k8sclient"
	"github.com/AliyunContainerService/terway/pkg/version"
	"github.com/AliyunContainerService/terway/pkg/vswitch"
	"github.com/AliyunContainerService/terway/types/controlplane"
)

var (
	scheme = runtime.NewScheme()
	log    = ctrl.Log.WithName("setup")
)

func init() {
	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
	utilruntime.Must(apiextensionsv1.AddToScheme(scheme))
	utilruntime.Must(networkv1beta1.AddToScheme(scheme))

	metrics.Registry.MustRegister(metric.OpenAPILatency)
}

func main() {
	rand.New(rand.NewSource(time.Now().UnixNano()))
	var (
		configFilePath     string
		credentialFilePath string
	)
	flag.StringVar(&configFilePath, "config", "/etc/config/ctrl-config.yaml", "config file for controlplane")
	flag.StringVar(&credentialFilePath, "credential", "/etc/credential/ctrl-secret.yaml", "secret file for controlplane")
	klog.InitFlags(nil)
	defer klog.Flush()

	flag.Parse()

	ctrl.SetLogger(klogr.New())
	log.Info(version.Version)

	ctx := ctrl.SetupSignalHandler()

	cfg, err := controlplane.ParseAndValidate(configFilePath, credentialFilePath)
	if err != nil {
		panic(err)
	}
	backoff.OverrideBackoff(cfg.BackoffOverride)
	utils.SetStsKinds(cfg.CustomStatefulWorkloadKinds)

	log.Info("using config", "config", cfg)

	restConfig := ctrl.GetConfigOrDie()
	restConfig.QPS = cfg.KubeClientQPS
	restConfig.Burst = cfg.KubeClientBurst
	restConfig.UserAgent = version.UA
	k8sclient.RegisterClients(restConfig)

	directClient, err := client.New(restConfig, client.Options{Scheme: scheme})
	if err != nil {
		log.Error(err, "unable to init k8s client")
		os.Exit(1)
	}

	err = crds.CreateOrUpdateCRD(ctx, directClient, crds.CRDPodENI)
	if err != nil {
		log.Error(err, "unable sync crd")
		os.Exit(1)
	}
	err = crds.CreateOrUpdateCRD(ctx, directClient, crds.CRDPodNetworking)
	if err != nil {
		log.Error(err, "unable sync crd")
		os.Exit(1)
	}

	ws := wh.NewServer(wh.Options{
		Port:    cfg.WebhookPort,
		CertDir: cfg.CertDir,
	})
	options := ctrl.Options{
		Scheme:                     scheme,
		HealthProbeBindAddress:     cfg.HealthzBindAddress,
		WebhookServer:              ws,
		LeaderElection:             cfg.LeaderElection,
		LeaderElectionID:           cfg.ControllerName,
		LeaderElectionNamespace:    cfg.ControllerNamespace,
		LeaderElectionResourceLock: "leases",
		MetricsBindAddress:         cfg.MetricsBindAddress,
	}

	if !cfg.DisableWebhook {
		err = cert.SyncCert(ctx, directClient, cfg.ControllerNamespace, cfg.ControllerName, cfg.ClusterDomain, cfg.CertDir)
		if err != nil {
			panic(err)
		}
	}

	var providers []credential.Interface
	if string(cfg.Credential.AccessKey) != "" && string(cfg.Credential.AccessSecret) != "" {
		providers = append(providers, credential.NewAKPairProvider(string(cfg.Credential.AccessKey), string(cfg.Credential.AccessSecret)))
	}
	providers = append(providers, credential.NewEncryptedCredentialProvider(cfg.CredentialPath, cfg.SecretNamespace, cfg.SecretName))
	providers = append(providers, credential.NewMetadataProvider())

	clientSet, err := credential.NewClientMgr(cfg.RegionID, providers...)
	if err != nil {
		panic(err)
	}

	aliyunClient, err := aliyun.New(clientSet, flowcontrol.NewTokenBucketRateLimiter(cfg.ReadOnlyQPS, cfg.ReadOnlyBurst), flowcontrol.NewTokenBucketRateLimiter(cfg.MutatingQPS, cfg.MutatingBurst))
	if err != nil {
		panic(err)
	}

	mgr, err := ctrl.NewManager(restConfig, options)
	if err != nil {
		panic(err)
	}

	err = mgr.AddHealthzCheck("healthz", healthz.Ping)
	if err != nil {
		panic(err)
	}
	err = mgr.AddReadyzCheck("readyz", healthz.Ping)
	if err != nil {
		panic(err)
	}

	if !cfg.DisableWebhook {
		mgr.GetWebhookServer().Register("/mutating", webhook.MutatingHook(mgr.GetClient()))
		mgr.GetWebhookServer().Register("/validate", webhook.ValidateHook())
	}

	vSwitchCtrl, err := vswitch.NewSwitchPool(cfg.VSwitchPoolSize, cfg.VSwitchCacheTTL)
	if err != nil {
		panic(err)
	}

	ctrlCtx := &register.ControllerCtx{
		Config:       cfg,
		VSwitchPool:  vSwitchCtrl,
		AliyunClient: aliyunClient,
	}

	for name := range register.Controllers {
		if controlplane.IsControllerEnabled(name, register.Controllers[name].Enable, cfg.Controllers) {
			err = register.Controllers[name].Creator(mgr, ctrlCtx)
			if err != nil {
				panic(err)
			}
			log.Info("register controller", "controller", name)
		}
	}

	log.Info("controller started")
	err = mgr.Start(ctx)
	if err != nil {
		panic(err)
	}
}