main.go

// Copyright © 2021 - 2022 Dell Inc. or its subsidiaries. All Rights Reserved.
//
// 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"
	"os"
	"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.

	csiclient "github.com/dell/csi-volumegroup-snapshotter/pkg/csiclient"
	"k8s.io/apimachinery/pkg/runtime"
	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
	"k8s.io/client-go/util/workqueue"
	ctrl "sigs.k8s.io/controller-runtime"

	volumegroupv1 "github.com/dell/csi-volumegroup-snapshotter/api/v1"

	// latest v1 from external does compile ok
	s1 "github.com/kubernetes-csi/external-snapshotter/client/v6/apis/volumesnapshot/v1"

	"github.com/dell/csi-volumegroup-snapshotter/controllers"
	"github.com/dell/csi-volumegroup-snapshotter/pkg/common"
	"github.com/dell/csi-volumegroup-snapshotter/pkg/connection"
	"sigs.k8s.io/controller-runtime/pkg/log/zap"
	//+kubebuilder:scaffold:imports
)

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

func init() {
	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
	utilruntime.Must(s1.AddToScheme(scheme))
	utilruntime.Must(volumegroupv1.AddToScheme(scheme))
	//+kubebuilder:scaffold:scheme
}

func main() {
	var enableLeaderElection bool
	var csiAddress string
	var workerThreads int
	var retryIntervalStart time.Duration
	var retryIntervalMax time.Duration
	var csiOperationTimeout time.Duration
	// var vgContextKeyPrefix   string
	var domain string
	flag.StringVar(&csiAddress, "csi-address", "/var/run/csi/csi.sock", "Address for the csi driver socket")
	flag.IntVar(&workerThreads, "worker-threads", 2, "Number of concurrent reconcilers for each of the controllers")
	flag.DurationVar(&retryIntervalStart, "retry-interval-start", time.Second, "Initial retry interval of failed reconcile request. It doubles with each failure, upto retry-interval-max")
	flag.DurationVar(&retryIntervalMax, "retry-interval-max", 5*time.Minute, "Maximum retry interval of failed reconcile request")
	flag.DurationVar(&csiOperationTimeout, "timeout", 10*time.Second, "Timeout of waiting for response for CSI Driver")
	// flag.StringVar(&vgContextKeyPrefix, "context-prefix", "", "All the volume-group-attribute-keys with this prefix are added as annotation to the DellCSIVolumeGroup")
	flag.Parse()

	flag.BoolVar(&enableLeaderElection, "leader-elect", false,
		"Enable leader election for controller manager. "+
			"Enabling this will ensure there is only one active controller manager.")

	// todo : remove later
	opts := zap.Options{
		Development: true,
	}
	opts.BindFlags(flag.CommandLine)
	flag.Parse()

	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
	setupLog.V(1).Info("Prefix", "Domain", domain)
	// setupLog.V(1).Info(common.DellCSIVolumegroup, "Version", "1.0.0")
	// Connect to csi
	csiConn, err := connection.Connect(csiAddress)
	if err != nil {
		setupLog.Error(err, "failed to connect to CSI driver")
		os.Exit(1)
	}
	leaderElectionID := common.DellCSIVolumegroup

	csiclientconn := csiclient.New(csiConn, ctrl.Log.WithName("csiclient"), csiOperationTimeout)

	driverName, err := csiclientconn.ProbeDriver()
	if err != nil {
		setupLog.Error(err, "error waiting for the CSI driver to be ready")
		os.Exit(1)
	}

	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
		Scheme:             scheme,
		MetricsBindAddress: "0",
		Port:               9443,
		LeaderElection:     enableLeaderElection,
		LeaderElectionID:   leaderElectionID,
	})
	if err != nil {
		setupLog.Error(err, "unable to start controller")
		os.Exit(1)
	}

	expRateLimiter := workqueue.NewItemExponentialFailureRateLimiter(retryIntervalStart, retryIntervalMax)
	schemaErr := s1.AddToScheme(mgr.GetScheme())
	if schemaErr != nil {
		setupLog.Error(schemaErr, "problem running manager")
		os.Exit(1)
	}
	if err = (&controllers.DellCsiVolumeGroupSnapshotReconciler{
		Client:        mgr.GetClient(),
		Log:           ctrl.Log.WithName("controllers").WithName("DellCsiVolumeGroupSnapshot"),
		VGClient:      csiclient.New(csiConn, ctrl.Log.WithName("volumegroup-client"), csiOperationTimeout),
		EventRecorder: mgr.GetEventRecorderFor(common.DellCSIVolumegroup),
		DriverName:    driverName,
		Scheme:        mgr.GetScheme(),
	}).SetupWithManager(mgr, expRateLimiter, workerThreads); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "DellCsiVolumeGroupSnapshot")
		os.Exit(1)
	}
	//+kubebuilder:scaffold:builder

	setupLog.Info("starting controller")
	if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
		setupLog.Error(err, "problem running manager")
		os.Exit(1)
	}
}