feat: configure k8s recommended labels on subresources

Signed-off-by: Gabriele Fedi <gabriele.fedi@enterprisedb.com>

Author: GabriFedi97

internal/cnpgi/operator/specs/metadata_test.go

@@ -0,0 +1,67 @@
+/*
+Copyright © contributors to CloudNativePG, established as
+CloudNativePG a Series of LF Projects, LLC.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+SPDX-License-Identifier: Apache-2.0
+*/
+
+package specs
+
+import (
+	cnpgv1 "github.com/cloudnative-pg/cloudnative-pg/api/v1"
+	"github.com/cloudnative-pg/cloudnative-pg/pkg/utils"
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
+	"github.com/cloudnative-pg/plugin-barman-cloud/internal/cnpgi/metadata"
+)
+
+var _ = Describe("GetRequiredLabels", func() {
+	It("should return all expected labels for a cluster without an image", func() {
+		cluster := &cnpgv1.Cluster{
+			ObjectMeta: metav1.ObjectMeta{
+				Name:      "my-cluster",
+				Namespace: "default",
+			},
+		}
+		labels := GetRequiredLabels(cluster)
+
+		Expect(labels).To(HaveKeyWithValue(metadata.ClusterLabelName, "my-cluster"))
+		Expect(labels).To(HaveKeyWithValue(utils.KubernetesAppLabelName, utils.AppName))
+		Expect(labels).To(HaveKeyWithValue(utils.KubernetesAppInstanceLabelName, "my-cluster"))
+		Expect(labels).To(HaveKeyWithValue(utils.KubernetesAppManagedByLabelName, "plugin-barman-cloud"))
+		Expect(labels).To(HaveKeyWithValue(utils.KubernetesAppComponentLabelName, utils.DatabaseComponentName))
+		Expect(labels).To(HaveLen(6))
+	})
+
+	It("should use the major version from the image catalog ref", func() {
+		cluster := &cnpgv1.Cluster{
+			ObjectMeta: metav1.ObjectMeta{
+				Name:      "pg16-cluster",
+				Namespace: "default",
+			},
+			Spec: cnpgv1.ClusterSpec{
+				ImageCatalogRef: &cnpgv1.ImageCatalogRef{
+					Major: 16,
+				},
+			},
+		}
+		labels := GetRequiredLabels(cluster)
+
+		Expect(labels).To(HaveKeyWithValue(utils.KubernetesAppVersionLabelName, "16"))
+		Expect(labels).To(HaveKeyWithValue(utils.KubernetesAppInstanceLabelName, "pg16-cluster"))
+	})
+})