Replace ExposeMetricsPort by CreateMetricsService

Commit to fix breaking change introduced in operator-sdk v0.9.0:
https://github.com/operator-framework/operator-sdk/blob/master/CHANGELOG.md#v090
Breaking change: ExposeMetricsPort is removed and replaced with
CreateMetricsService() function. PrometheusPortName constant is replaced with
OperatorPortName. (operator-sdk PR #1560)

cmd/manager/main.go

@@ -8,6 +8,8 @@ import (
 	"runtime"
 
 	// Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.)
+	v1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/util/intstr"
 	_ "k8s.io/client-go/plugin/pkg/client/auth"
 
 	"github.com/3scale/apicast-operator/pkg/apis"
@@ -28,8 +30,9 @@ import (
 
 // Change below variables to serve metrics on different host or port.
 var (
-	metricsHost       = "0.0.0.0"
-	metricsPort int32 = 8383
+	metricsHost               = "0.0.0.0"
+	metricsPort         int32 = 8383
+	operatorMetricsPort int32 = 8686
 )
 var log = logf.Log.WithName("cmd")
 
@@ -109,8 +112,14 @@ func main() {
 		os.Exit(1)
 	}
 
-	// Create Service object to expose the metrics port.
-	_, err = metrics.ExposeMetricsPort(ctx, metricsPort)
+	// 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).
+	_, err = metrics.CreateMetricsService(ctx, cfg, servicePorts)
 	if err != nil {
 		log.Info(err.Error())
 	}