kubernetes: move k8s-components creation to internal

The CLI will have to create similar objects for k8s upgrades.

internal/kubernetes/configmaps.go

@@ -7,12 +7,19 @@ SPDX-License-Identifier: AGPL-3.0-only
 package kubernetes
 
 import (
-	k8s "k8s.io/api/core/v1"
+	"encoding/json"
+	"fmt"
+	"strings"
+
+	"github.com/edgelesssys/constellation/v2/internal/constants"
+	"github.com/edgelesssys/constellation/v2/internal/versions/components"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 )
 
 // ConfigMaps represent a list of k8s ConfigMap.
-type ConfigMaps []*k8s.ConfigMap
+type ConfigMaps []*corev1.ConfigMap
 
 // Marshal marshals config maps into multiple YAML documents.
 func (s ConfigMaps) Marshal() ([]byte, error) {
@@ -22,3 +29,34 @@ func (s ConfigMaps) Marshal() ([]byte, error) {
 	}
 	return MarshalK8SResourcesList(objects)
 }
+
+// ConstructK8sComponentsCM creates a k8s-components config map for the given components.
+func ConstructK8sComponentsCM(components components.Components, clusterVersion string) (corev1.ConfigMap, error) {
+	componentsMarshalled, err := json.Marshal(components)
+	if err != nil {
+		return corev1.ConfigMap{}, fmt.Errorf("marshalling component versions: %w", err)
+	}
+
+	componentsHash := components.GetHash()
+	componentConfigMapName := fmt.Sprintf("k8s-components-%s", strings.ReplaceAll(componentsHash, ":", "-"))
+
+	return corev1.ConfigMap{
+		TypeMeta: metav1.TypeMeta{
+			APIVersion: "v1",
+			Kind:       "ConfigMap",
+		},
+		Immutable: toPtr(true),
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      componentConfigMapName,
+			Namespace: "kube-system",
+		},
+		Data: map[string]string{
+			constants.ComponentsListKey:   string(componentsMarshalled),
+			constants.K8sVersionFieldName: clusterVersion,
+		},
+	}, nil
+}
+
+func toPtr[T any](v T) *T {
+	return &v
+}