Fix API Server url for Managed EKS

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- Fix api server url in case the CAPI provider sets https prefix in the CAPI CR status.
+
 ## [4.48.0] - 2023-09-19
 
 ### Changed

files/templates/scrapeconfigs/_apiserver.yaml

@@ -1,6 +1,6 @@
 [[- define "_apiserver" -]]
 [[- if ne .ClusterType "management_cluster" ]]
-    api_server: https://[[ .APIServerURL ]]
+    api_server: [[ .APIServerURL ]]
 [[- if eq .AuthenticationType "token" ]]
     bearer_token_file: /etc/prometheus/secrets/[[ .SecretName ]]/token
 [[- end ]]

service/key/key.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"math"
+	"strings"
 
 	"github.com/giantswarm/k8sclient/v7/pkg/k8sclient"
 	"github.com/giantswarm/microerror"
@@ -270,11 +271,15 @@ func AlertmanagerKey() string {
 func APIUrl(obj interface{}) string {
 	switch v := obj.(type) {
 	case *v1.Service:
-		return "kubernetes.default:443"
+		return "https://kubernetes.default:443"
 	case *capi.Cluster:
-		return fmt.Sprintf("%s:%d", v.Spec.ControlPlaneEndpoint.Host, v.Spec.ControlPlaneEndpoint.Port)
+		controlPlaneEndpointHost := v.Spec.ControlPlaneEndpoint.Host
+		if !strings.HasPrefix(controlPlaneEndpointHost, "https://") {
+			controlPlaneEndpointHost = "https://" + controlPlaneEndpointHost
+		}
+		return fmt.Sprintf("%s:%d", controlPlaneEndpointHost, v.Spec.ControlPlaneEndpoint.Port)
 	case metav1.Object:
-		return fmt.Sprintf("master.%s:443", v.GetName())
+		return fmt.Sprintf("https://master.%s:443", v.GetName())
 	}
 
 	return ""