main.go

/*


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 (
	"fmt"
	"os"

	"github.com/spf13/cobra"
	"github.com/spf13/pflag"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/client-go/kubernetes"
	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
	_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/log/zap"

	operatorv1 "github.com/opencurve/curve-operator/api/v1"
	"github.com/opencurve/curve-operator/pkg/clusterd"
	"github.com/opencurve/curve-operator/pkg/controllers"
)

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

func init() {
	_ = clientgoscheme.AddToScheme(scheme)
	_ = operatorv1.AddToScheme(scheme)
	// +kubebuilder:scaffold:scheme
}

type CurveOptions struct {
	MetricsAddr          string
	EnableLeaderElection bool
}

// NewCurveOptions creates a new CurveOptions with a default config
func NewCurveOptions() (*CurveOptions, error) {
	return &CurveOptions{
		MetricsAddr:          ":8080",
		EnableLeaderElection: false,
	}, nil
}

func main() {
	opts, err := NewCurveOptions()
	if err != nil {
		fmt.Fprintf(os.Stderr, "error: %v\n", err)
		os.Exit(1)
	}

	cmd := &cobra.Command{
		Use: "curve-operator",
		Long: `The Curve-Operator is a daemon to deploy Curve and auto it on kubernetes. 
		It supports Curve storage to natively integrate with cloud-native environments.`,
		Run: func(cmd *cobra.Command, args []string) {
			setupLog.Error(opts.Run(), "failed to run curve-operator")
			os.Exit(1)
		},
	}

	opts.AddFlags(cmd.Flags())

	if err := cmd.Execute(); err != nil {
		fmt.Fprintf(os.Stderr, "error: %v\n", err)
		os.Exit(1)
	}
}

func (opts *CurveOptions) Run() error {
	ctrl.SetLogger(zap.New(zap.UseDevMode(true)))

	config := ctrl.GetConfigOrDie()
	clientSet, err := kubernetes.NewForConfig(config)
	if err != nil {
		setupLog.Error(err, "failed to create clientset")
		os.Exit(1)
	}

	mgr, err := ctrl.NewManager(config, ctrl.Options{
		Scheme:             scheme,
		MetricsBindAddress: opts.MetricsAddr,
		Port:               9443,
		LeaderElection:     opts.EnableLeaderElection,
		LeaderElectionID:   "aa88fc6c.curve.io",
	})
	if err != nil {
		setupLog.Error(err, "unable to start manager")
		os.Exit(1)
	}

	context := clusterd.Context{
		KubeConfig: config,
		Clientset:  clientSet,
		Client:     mgr.GetClient(),
	}

	if err = (controllers.NewCurveClusterReconciler(
		mgr.GetClient(),
		ctrl.Log.WithName("controllers").WithName("CurveCluster"),
		mgr.GetScheme(),
		context,
	)).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "CurveCluster")
		os.Exit(1)
	}
	if err = (controllers.NewCurvefsReconciler(
		mgr.GetClient(),
		ctrl.Log.WithName("controllers").WithName("Curvefs"),
		mgr.GetScheme(),
		context,
	)).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "CurvefsCluster")
		os.Exit(1)
	}
	if err = (&operatorv1.CurveCluster{}).SetupWebhookWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create webhook", "webhook", "CurveCluster")
		os.Exit(1)
	}
	if err = (&operatorv1.Curvefs{}).SetupWebhookWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create webhook", "webhook", "Curvefs")
		os.Exit(1)
	}
	// +kubebuilder:scaffold:builder

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

	return nil
}

// AddFlags adds flags to fs and binds them to options.
func (opts *CurveOptions) AddFlags(fs *pflag.FlagSet) {
	fs.StringVar(&opts.MetricsAddr, "metrics-port", opts.MetricsAddr, "The address on which to advertise.")
	fs.BoolVar(&opts.EnableLeaderElection, "enable-leader-election", opts.EnableLeaderElection, "Enables leader election for curve-operator master.")
}