Remove scaffold code from operator-sdk init

This code was generated as part of the scaffold when using the sdk. This
code was intended to mitigate a user error observed when using
"operator-sdk up local" cmd.

See operator-framework/operator-sdk#2190 for
more information.

We do not longer need this code. The metrics endpoint for prometheus is
initialized by controller-runtime in the background.

Signed-off-by: Matthias Diester <matthias.diester@de.ibm.com>

Author: qu1queee

cmd/manager/main.go

@@ -6,31 +6,22 @@ package main
 
 import (
 	"context"
-	"errors"
 	"flag"
 	"fmt"
 	"os"
 	"runtime"
 
-	"github.com/operator-framework/operator-sdk/pkg/k8sutil"
-	kubemetrics "github.com/operator-framework/operator-sdk/pkg/kube-metrics"
-
 	// Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.)
 	"github.com/operator-framework/operator-sdk/pkg/log/zap"
-	"github.com/operator-framework/operator-sdk/pkg/metrics"
 	"github.com/operator-framework/operator-sdk/pkg/ready"
 	sdkVersion "github.com/operator-framework/operator-sdk/version"
 	"github.com/spf13/pflag"
 
-	v1 "k8s.io/api/core/v1"
-	"k8s.io/apimachinery/pkg/util/intstr"
 	_ "k8s.io/client-go/plugin/pkg/client/auth"
-	"k8s.io/client-go/rest"
 	"sigs.k8s.io/controller-runtime/pkg/client/config"
 	"sigs.k8s.io/controller-runtime/pkg/manager"
 	"sigs.k8s.io/controller-runtime/pkg/manager/signals"
 
-	"github.com/shipwright-io/build/pkg/apis"
 	buildconfig "github.com/shipwright-io/build/pkg/config"
 	"github.com/shipwright-io/build/pkg/controller"
 	"github.com/shipwright-io/build/pkg/ctxlog"
@@ -40,9 +31,8 @@ import (
 
 // Change below variables to serve metrics on different host or port.
 var (
-	metricsHost               = "0.0.0.0"
-	metricsPort         int32 = 8383
-	operatorMetricsPort int32 = 8686
+	metricsHost       = "0.0.0.0"
+	metricsPort int32 = 8383
 )
 
 func printVersion(ctx context.Context) {
@@ -78,12 +68,6 @@ func main() {
 
 	printVersion(ctx)
 
-	namespace, err := k8sutil.GetWatchNamespace()
-	if err != nil {
-		ctxlog.Error(ctx, err, "Failed to get watch namespace")
-		os.Exit(1)
-	}
-
 	// Get a config to talk to the apiserver
 	cfg, err := config.GetConfig()
 	if err != nil {
@@ -120,8 +104,6 @@ func main() {
 		os.Exit(1)
 	}
 
-	// Add the Metrics Service
-	addMetrics(ctx, cfg, namespace)
 	buildMetrics.InitPrometheus(buildCfg)
 
 	// Add optionally configured extra handlers to metrics endpoint
@@ -140,58 +122,3 @@ func main() {
 		os.Exit(1)
 	}
 }
-
-// addMetrics will create the Services and Service Monitors to allow the operator export the metrics by using
-// the Prometheus operator
-func addMetrics(ctx context.Context, cfg *rest.Config, namespace string) {
-	if err := serveCRMetrics(cfg); err != nil {
-		if errors.Is(err, k8sutil.ErrRunLocal) {
-			ctxlog.Info(ctx, "Skipping CR metrics server creation; not running in a cluster.")
-			return
-		}
-		ctxlog.Info(ctx, "Could not generate and serve custom resource metrics", "error", err.Error())
-	}
-
-	// Add to the below struct any other metrics ports you want to expose.
-	servicePorts := []v1.ServicePort{
-		{Port: metricsPort, Name: metrics.OperatorPortName, Protocol: v1.ProtocolTCP, TargetPort: intstr.IntOrString{Type: intstr.Int, IntVal: metricsPort}},
-		{Port: operatorMetricsPort, Name: metrics.CRPortName, Protocol: v1.ProtocolTCP, TargetPort: intstr.IntOrString{Type: intstr.Int, IntVal: operatorMetricsPort}},
-	}
-
-	// Create Service object to expose the metrics port(s).
-	service, err := metrics.CreateMetricsService(ctx, cfg, servicePorts)
-	if err != nil {
-		ctxlog.Info(ctx, "Could not create metrics Service", "error", err.Error())
-	}
-
-	// CreateServiceMonitors will automatically create the prometheus-operator ServiceMonitor resources
-	// necessary to configure Prometheus to scrape metrics from this operator.
-	services := []*v1.Service{service}
-	_, err = metrics.CreateServiceMonitors(cfg, namespace, services)
-	if err != nil {
-		ctxlog.Info(ctx, "Could not create ServiceMonitor object", "error", err.Error())
-		// If this operator is deployed to a cluster without the prometheus-operator running, it will return
-		// ErrServiceMonitorNotPresent, which can be used to safely skip ServiceMonitor creation.
-		if err == metrics.ErrServiceMonitorNotPresent {
-			ctxlog.Info(ctx, "Install prometheus-operator in your cluster to create ServiceMonitor objects", "error", err.Error())
-		}
-	}
-}
-
-// serveCRMetrics gets the Operator/CustomResource GVKs and generates metrics based on those types.
-// It serves those metrics on "http://metricsHost:operatorMetricsPort".
-func serveCRMetrics(cfg *rest.Config) error {
-	// Below function returns filtered operator/CustomResource specific GVKs.
-	// For more control override the below GVK list with your own custom logic.
-	filteredGVK, err := k8sutil.GetGVKsFromAddToScheme(apis.AddToScheme)
-	if err != nil {
-		return err
-	}
-	ns := []string{""}
-	// Generate and serve custom resource specific metrics.
-	err = kubemetrics.GenerateAndServeCRMetrics(cfg, ns, filteredGVK, metricsHost, operatorMetricsPort)
-	if err != nil {
-		return err
-	}
-	return nil
-}