wrap NTO controller with controller runtime lib

Dockerfile

@@ -1,4 +1,4 @@
-FROM registry.ci.openshift.org/openshift/release:golang-1.16 AS builder
+FROM registry.ci.openshift.org/openshift/release:golang-1.17 AS builder
 WORKDIR /go/src/github.com/openshift/cluster-node-tuning-operator
 COPY . .
 RUN make build
@@ -20,7 +20,7 @@ RUN INSTALL_PKGS=" \
 
 FROM centos:8
 COPY --from=builder /go/src/github.com/openshift/cluster-node-tuning-operator/_output/cluster-node-tuning-operator /usr/bin/
-COPY manifests/*.yaml manifests/image-references /manifests
+COPY manifests/*.yaml manifests/image-references /manifests/
 ENV APP_ROOT=/var/lib/tuned
 ENV PATH=${APP_ROOT}/bin:${PATH}
 ENV HOME=${APP_ROOT}

Dockerfile.rhel8

@@ -20,7 +20,7 @@ RUN INSTALL_PKGS=" \
 
 FROM registry.ci.openshift.org/ocp/4.11:base
 COPY --from=builder /go/src/github.com/openshift/cluster-node-tuning-operator/_output/cluster-node-tuning-operator /usr/bin/
-COPY manifests/*.yaml manifests/image-references /manifests
+COPY manifests/*.yaml manifests/image-references /manifests/
 ENV APP_ROOT=/var/lib/tuned
 ENV PATH=${APP_ROOT}/bin:${PATH}
 ENV HOME=${APP_ROOT}

cmd/cluster-node-tuning-operator/main.go

@@ -6,58 +6,112 @@ import (
 	"path/filepath"
 	"runtime"
 
+	apiconfigv1 "github.com/openshift/api/config/v1"
+	mcov1 "github.com/openshift/machine-config-operator/pkg/apis/machineconfiguration.openshift.io/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	apiruntime "k8s.io/apimachinery/pkg/runtime"
+	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
+	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
+
 	"k8s.io/klog/v2"
 
 	tunedv1 "github.com/openshift/cluster-node-tuning-operator/pkg/apis/tuned/v1"
+	"github.com/openshift/cluster-node-tuning-operator/pkg/config"
 	"github.com/openshift/cluster-node-tuning-operator/pkg/metrics"
 	"github.com/openshift/cluster-node-tuning-operator/pkg/operator"
 	"github.com/openshift/cluster-node-tuning-operator/pkg/signals"
 	"github.com/openshift/cluster-node-tuning-operator/pkg/tuned"
+	"github.com/openshift/cluster-node-tuning-operator/pkg/util"
 	"github.com/openshift/cluster-node-tuning-operator/version"
+	ctrl "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/cache"
+)
+
+const (
+	operandFilename  = "openshift-tuned"
+	operatorFilename = "cluster-node-tuning-operator"
+	metricsHost      = "0.0.0.0"
 )
 
 var (
-	boolVersion = flag.Bool("version", false, "show program version and exit")
-	boolLocal   = flag.Bool("local", false, "local run outside a pod")
+	scheme = apiruntime.NewScheme()
 )
 
+func init() {
+	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
+	utilruntime.Must(tunedv1.AddToScheme(scheme))
+	utilruntime.Must(mcov1.AddToScheme(scheme))
+	utilruntime.Must(apiconfigv1.Install(scheme))
+}
+
 func printVersion() {
 	klog.Infof("Go Version: %s", runtime.Version())
 	klog.Infof("Go OS/Arch: %s/%s", runtime.GOOS, runtime.GOARCH)
 	klog.Infof("%s Version: %s", tunedv1.TunedClusterOperatorResourceName, version.Version)
 }
 
 func main() {
-	const (
-		operandFilename  string = "openshift-tuned"
-		operatorFilename string = "cluster-node-tuning-operator"
-	)
+	var boolVersion bool
+	var enableLeaderElection bool
+	flag.BoolVar(&boolVersion, "version", false, "show program version and exit")
+	flag.BoolVar(&enableLeaderElection, "enable-leader-election", true,
+		"Enable leader election for controller manager. "+
+			"Enabling this will ensure there is only one active controller manager.")
 
 	runAs := filepath.Base(os.Args[0])
 
-	stopCh := signals.SetupSignalHandler()
-
 	switch runAs {
 	case operatorFilename:
 		klog.InitFlags(nil)
 		flag.Parse()
 
 		printVersion()
 
-		if *boolVersion {
+		if boolVersion {
 			os.Exit(0)
 		}
 
-		go metrics.RunServer(metrics.MetricsPort, stopCh)
-		metrics.RegisterVersion(version.Version)
+		// We have two namespaces that we need to watch:
+		// 1. NTO namespace - for NTO resources
+		// 2. None namespace - for cluster wide resources
+		ntoNamespace := config.OperatorNamespace()
+		namespaces := []string{
+			ntoNamespace,
+			metav1.NamespaceNone,
+		}
+
+		restConfig := ctrl.GetConfigOrDie()
+		le := util.GetLeaderElectionConfig(restConfig, enableLeaderElection)
+		mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
+			NewCache:                cache.MultiNamespacedCacheBuilder(namespaces),
+			Scheme:                  scheme,
+			LeaderElection:          true,
+			LeaderElectionID:        config.OperatorLockName,
+			LeaderElectionNamespace: ntoNamespace,
+			LeaseDuration:           &le.LeaseDuration.Duration,
+			RetryPeriod:             &le.RetryPeriod.Duration,
+			RenewDeadline:           &le.RenewDeadline.Duration,
+			Namespace:               ntoNamespace,
+		})
+
+		if err != nil {
+			klog.Exit(err)
+		}
+
 		controller, err := operator.NewController()
 		if err != nil {
 			klog.Fatal(err)
 		}
+		mgr.Add(controller)
+		mgr.Add(metrics.Server{})
+		metrics.RegisterVersion(version.Version)
 
-		controller.BecomeLeader(stopCh)
+		if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
+			klog.Exitf("manager exited with non-zero code: %v", err)
+		}
 	case operandFilename:
-		tuned.Run(stopCh, boolVersion, version.Version)
+		stopCh := signals.SetupSignalHandler()
+		tuned.Run(stopCh, &boolVersion, version.Version)
 	default:
 		klog.Fatalf("application should be run as \"%s\" or \"%s\"", operatorFilename, operandFilename)
 	}

go.mod

@@ -4,10 +4,9 @@ go 1.17
 
 require (
 	github.com/coreos/ignition/v2 v2.7.0
-	github.com/google/uuid v1.1.2
 	github.com/kevinburke/go-bindata v3.16.0+incompatible
-	github.com/onsi/ginkgo v1.14.0
-	github.com/onsi/gomega v1.10.1
+	github.com/onsi/ginkgo v1.16.5
+	github.com/onsi/gomega v1.17.0
 	github.com/openshift/api v0.0.0-20211209135129-c58d9f695577
 	github.com/openshift/build-machinery-go v0.0.0-20211213093930-7e33a7eb4ce3
 	github.com/openshift/client-go v0.0.0-20211209144617-7385dd6338e3
@@ -24,6 +23,7 @@ require (
 	k8s.io/klog v1.0.0
 	k8s.io/klog/v2 v2.30.0
 	k8s.io/utils v0.0.0-20210930125809-cb0fa318a74b
+	sigs.k8s.io/controller-runtime v0.11.0
 	sigs.k8s.io/controller-tools v0.4.0
 )
 
@@ -39,31 +39,32 @@ require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/emicklei/go-restful v2.10.0+incompatible // indirect
 	github.com/evanphx/json-patch v4.12.0+incompatible // indirect
-	github.com/fatih/color v1.7.0 // indirect
-	github.com/fsnotify/fsnotify v1.4.9 // indirect
+	github.com/fatih/color v1.12.0 // indirect
+	github.com/fsnotify/fsnotify v1.5.1 // indirect
 	github.com/ghodss/yaml v1.0.0 // indirect
 	github.com/go-logr/logr v1.2.0 // indirect
 	github.com/go-openapi/jsonpointer v0.19.5 // indirect
 	github.com/go-openapi/jsonreference v0.19.5 // indirect
 	github.com/go-openapi/swag v0.19.14 // indirect
-	github.com/gobuffalo/flect v0.2.0 // indirect
+	github.com/gobuffalo/flect v0.2.3 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
-	github.com/google/go-cmp v0.5.5 // indirect
+	github.com/google/go-cmp v0.5.6 // indirect
 	github.com/google/gofuzz v1.1.0 // indirect
+	github.com/google/uuid v1.1.2 // indirect
 	github.com/googleapis/gnostic v0.5.5 // indirect
-	github.com/imdario/mergo v0.3.9 // indirect
+	github.com/imdario/mergo v0.3.12 // indirect
 	github.com/inconshreveable/mousetrap v1.0.0 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/mailru/easyjson v0.7.6 // indirect
-	github.com/mattn/go-colorable v0.1.2 // indirect
+	github.com/mattn/go-colorable v0.1.8 // indirect
 	github.com/mattn/go-isatty v0.0.12 // indirect
 	github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
-	github.com/nxadm/tail v1.4.4 // indirect
+	github.com/nxadm/tail v1.4.8 // indirect
 	github.com/prometheus/client_model v0.2.0 // indirect
 	github.com/prometheus/common v0.28.0 // indirect
 	github.com/prometheus/procfs v0.6.0 // indirect
@@ -73,24 +74,26 @@ require (
 	golang.org/x/mod v0.4.2 // indirect
 	golang.org/x/net v0.0.0-20210825183410-e898025ed96a // indirect
 	golang.org/x/oauth2 v0.0.0-20210819190943-2bc19b11175f // indirect
-	golang.org/x/sys v0.0.0-20210831042530-f4d43177bf5e // indirect
+	golang.org/x/sys v0.0.0-20211029165221-6e7872819dc8 // indirect
 	golang.org/x/term v0.0.0-20210615171337-6886f2dfbf5b // indirect
 	golang.org/x/text v0.3.7 // indirect
 	golang.org/x/time v0.0.0-20210723032227-1f47c861a9ac // indirect
 	golang.org/x/tools v0.1.6-0.20210820212750-d4cc65f0b2ff // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
+	gomodules.xyz/jsonpatch/v2 v2.2.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
 	google.golang.org/protobuf v1.27.1 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
 	k8s.io/apiextensions-apiserver v0.23.0 // indirect
+	k8s.io/component-base v0.23.0 // indirect
 	k8s.io/gengo v0.0.0-20210813121822-485abfe95c7c // indirect
 	k8s.io/kube-openapi v0.0.0-20211115234752-e816edb12b65 // indirect
 	sigs.k8s.io/json v0.0.0-20211020170558-c049b76a60c6 // indirect
 	sigs.k8s.io/structured-merge-diff/v4 v4.2.0 // indirect
-	sigs.k8s.io/yaml v1.2.0 // indirect
+	sigs.k8s.io/yaml v1.3.0 // indirect
 )
 
 // Pinned to kubernetes-1.23.0
@@ -105,6 +108,8 @@ replace (
 	k8s.io/cluster-bootstrap => k8s.io/cluster-bootstrap v0.23.0
 	k8s.io/code-generator => k8s.io/code-generator v0.23.0
 	k8s.io/component-base => k8s.io/component-base v0.23.0
+	k8s.io/component-helpers => k8s.io/component-helpers v0.23.0
+	k8s.io/controller-manager => k8s.io/controller-manager v0.23.0
 	k8s.io/cri-api => k8s.io/cri-api v0.23.0
 	k8s.io/csi-translation-lib => k8s.io/csi-translation-lib v0.23.0
 	k8s.io/kube-aggregator => k8s.io/kube-aggregator v0.23.0
@@ -116,5 +121,8 @@ replace (
 	k8s.io/kubernetes => k8s.io/kubernetes v1.23.0
 	k8s.io/legacy-cloud-providers => k8s.io/legacy-cloud-providers v0.23.0
 	k8s.io/metrics => k8s.io/metrics v0.23.0
+	k8s.io/mount-utils => k8s.io/mount-utils v0.23.0
 	k8s.io/sample-apiserver => k8s.io/sample-apiserver v0.23.0
+	sigs.k8s.io/controller-runtime => sigs.k8s.io/controller-runtime v0.11.0
+	sigs.k8s.io/controller-tools => sigs.k8s.io/controller-tools v0.7.0
 )