main.go

/*
Copyright (c) 2021, 2022 Oracle and/or its affiliates.

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"

	infrastructurev1beta1 "github.com/oracle/cluster-api-provider-oci/api/v1beta1"
	"github.com/oracle/cluster-api-provider-oci/cloud/config"
	"github.com/oracle/cluster-api-provider-oci/cloud/scope"
	"github.com/oracle/cluster-api-provider-oci/controllers"
	"github.com/oracle/oci-go-sdk/v53/core"
	"github.com/oracle/oci-go-sdk/v53/identity"
	"github.com/oracle/oci-go-sdk/v53/networkloadbalancer"
	"k8s.io/apimachinery/pkg/runtime"
	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
	_ "k8s.io/client-go/plugin/pkg/client/auth"
	"k8s.io/klog/v2/klogr"
	clusterv1 "sigs.k8s.io/cluster-api/api/v1beta1"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/controller"
	"sigs.k8s.io/controller-runtime/pkg/healthz"
	"sigs.k8s.io/controller-runtime/pkg/log/zap"
	//+kubebuilder:scaffold:imports
)

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

const (
	AuthConfigDirectory = "AUTH_CONFIG_DIR"
)

func init() {
	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
	utilruntime.Must(infrastructurev1beta1.AddToScheme(scheme))
	utilruntime.Must(clusterv1.AddToScheme(scheme))
	//+kubebuilder:scaffold:scheme
}

func main() {
	var metricsAddr string
	var enableLeaderElection bool
	var probeAddr string
	var webhookPort int

	flag.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "The address the metric endpoint binds to.")
	flag.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to.")
	flag.BoolVar(&enableLeaderElection, "leader-elect", false,
		"Enable leader election for controller manager. "+
			"Enabling this will ensure there is only one active controller manager.")
	flag.IntVar(&webhookPort,
		"webhook-port",
		9443,
		"Webhook Server port.",
	)

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

	ctrl.SetLogger(klogr.New())

	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
		Scheme:                 scheme,
		MetricsBindAddress:     metricsAddr,
		Port:                   webhookPort,
		HealthProbeBindAddress: probeAddr,
		LeaderElection:         enableLeaderElection,
		LeaderElectionID:       "controller-leader-elect-capoci",
	})
	if err != nil {
		setupLog.Error(err, "unable to start manager")
		os.Exit(1)
	}

	authConfigDir := os.Getenv(AuthConfigDirectory)
	if authConfigDir == "" {
		setupLog.Error(err, "auth config directory environment variable is not set")
		os.Exit(1)
	}

	authConfig, err := config.FromDir(authConfigDir)
	if err != nil {
		setupLog.Error(err, "invalid auth config file")
		os.Exit(1)
	}

	ociAuthConfigProvider, err := config.NewConfigurationProvider(authConfig)
	if err != nil {
		setupLog.Error(err, "authentication provider could not be initialised")
		os.Exit(1)
	}

	// Setup the context that's going to be used in controllers and for the manager.
	ctx := ctrl.SetupSignalHandler()

	region, err := ociAuthConfigProvider.Region()
	if err != nil {
		setupLog.Error(err, "unable to get OCI region from AuthConfigProvider")
		os.Exit(1)
	}

	vcnClient, err := core.NewVirtualNetworkClientWithConfigurationProvider(ociAuthConfigProvider)
	if err != nil {
		setupLog.Error(err, "unable to create OCI VCN Client")
		os.Exit(1)
	}

	lbClient, err := networkloadbalancer.NewNetworkLoadBalancerClientWithConfigurationProvider(ociAuthConfigProvider)
	if err != nil {
		setupLog.Error(err, "unable to create OCI LB Client")
		os.Exit(1)
	}

	identityClient, err := identity.NewIdentityClientWithConfigurationProvider(ociAuthConfigProvider)
	if err != nil {
		setupLog.Error(err, "unable to create OCI Identity Client")
		os.Exit(1)
	}

	if err = (&controllers.OCIClusterReconciler{
		Client:                    mgr.GetClient(),
		Scheme:                    mgr.GetScheme(),
		VCNClient:                 vcnClient,
		NetworkLoadBalancerClient: lbClient,
		IdentityClient:            identityClient,
		Region:                    region,
		Recorder:                  mgr.GetEventRecorderFor("ocicluster-controller"),
	}).SetupWithManager(ctx, mgr, controller.Options{}); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", scope.OCIClusterKind)
		os.Exit(1)
	}

	computeClient, err := core.NewComputeClientWithConfigurationProvider(ociAuthConfigProvider)
	if err != nil {
		setupLog.Error(err, "unable to create OCI Compute Client")
		os.Exit(1)
	}

	if err = (&controllers.OCIMachineReconciler{
		Client:                    mgr.GetClient(),
		Scheme:                    mgr.GetScheme(),
		ComputeClient:             computeClient,
		VCNClient:                 vcnClient,
		NetworkLoadBalancerClient: lbClient,
		Recorder:                  mgr.GetEventRecorderFor("ocimachine-controller"),
	}).SetupWithManager(ctx, mgr, controller.Options{}); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", scope.OCIMachineKind)
		os.Exit(1)
	}
	//+kubebuilder:scaffold:builder

	if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil {
		setupLog.Error(err, "unable to set up health check")
		os.Exit(1)
	}
	if err := mgr.AddReadyzCheck("readyz", healthz.Ping); err != nil {
		setupLog.Error(err, "unable to set up ready check")
		os.Exit(1)
	}

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