test: add e2e test for credential rotation

Add an e2e test that verifies the ObjectStore controller updates the
RBAC Role when an ObjectStore's secret reference changes. The test
creates a Cluster with a MinIO ObjectStore, verifies the Role has the
cluster label and references the original secret, then updates the
ObjectStore to point to a new secret and waits for the Role to be
patched accordingly.

Signed-off-by: Marco Nenciarini <marco.nenciarini@enterprisedb.com>

Author: mnencia

test/e2e/e2e_suite_test.go

@@ -37,6 +37,7 @@ import (
 	"github.com/cloudnative-pg/plugin-barman-cloud/test/e2e/internal/kustomize"
 
 	_ "github.com/cloudnative-pg/plugin-barman-cloud/test/e2e/internal/tests/backup"
+	_ "github.com/cloudnative-pg/plugin-barman-cloud/test/e2e/internal/tests/credentialrotation"
 	_ "github.com/cloudnative-pg/plugin-barman-cloud/test/e2e/internal/tests/replicacluster"
 
 	. "github.com/onsi/ginkgo/v2"

test/e2e/internal/tests/credentialrotation/credential_rotation.go

@@ -0,0 +1,171 @@
+/*
+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 credentialrotation
+
+import (
+	"time"
+
+	cloudnativepgv1 "github.com/cloudnative-pg/api/pkg/api/v1"
+	corev1 "k8s.io/api/core/v1"
+	rbacv1 "k8s.io/api/rbac/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/utils/ptr"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+
+	"github.com/cloudnative-pg/plugin-barman-cloud/internal/cnpgi/metadata"
+	"github.com/cloudnative-pg/plugin-barman-cloud/internal/cnpgi/operator/specs"
+	internalClient "github.com/cloudnative-pg/plugin-barman-cloud/test/e2e/internal/client"
+	internalCluster "github.com/cloudnative-pg/plugin-barman-cloud/test/e2e/internal/cluster"
+	nmsp "github.com/cloudnative-pg/plugin-barman-cloud/test/e2e/internal/namespace"
+	"github.com/cloudnative-pg/plugin-barman-cloud/test/e2e/internal/objectstore"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+)
+
+const (
+	clusterName     = "source"
+	objectStoreName = "source"
+	oldSecretName   = "minio"
+	newSecretName   = "minio-rotated"
+)
+
+var _ = Describe("Credential rotation", func() {
+	var namespace *corev1.Namespace
+	var cl client.Client
+
+	BeforeEach(func(ctx SpecContext) {
+		var err error
+		cl, _, err = internalClient.NewClient()
+		Expect(err).NotTo(HaveOccurred())
+		namespace, err = nmsp.CreateUniqueNamespace(ctx, cl, "cred-rotation")
+		Expect(err).NotTo(HaveOccurred())
+	})
+
+	AfterEach(func(ctx SpecContext) {
+		Expect(cl.Delete(ctx, namespace)).To(Succeed())
+	})
+
+	It("should update the Role when the ObjectStore secret reference changes", func(ctx SpecContext) {
+		By("starting the ObjectStore deployment")
+		resources := objectstore.NewMinioObjectStoreResources(namespace.Name, oldSecretName)
+		Expect(resources.Create(ctx, cl)).To(Succeed())
+
+		By("creating the ObjectStore")
+		store := objectstore.NewMinioObjectStore(namespace.Name, objectStoreName, oldSecretName)
+		Expect(cl.Create(ctx, store)).To(Succeed())
+
+		By("creating the Cluster")
+		cluster := newCluster(namespace.Name)
+		Expect(cl.Create(ctx, cluster)).To(Succeed())
+
+		By("waiting for the Cluster to be ready")
+		Eventually(func(g Gomega) {
+			g.Expect(cl.Get(ctx, types.NamespacedName{
+				Name:      cluster.Name,
+				Namespace: cluster.Namespace,
+			}, cluster)).To(Succeed())
+			g.Expect(internalCluster.IsReady(*cluster)).To(BeTrue())
+		}).WithTimeout(10 * time.Minute).WithPolling(10 * time.Second).Should(Succeed())
+
+		roleKey := types.NamespacedName{
+			Name:      specs.GetRBACName(clusterName),
+			Namespace: namespace.Name,
+		}
+
+		By("verifying the Role has the cluster label and references the original secret")
+		var role rbacv1.Role
+		Expect(cl.Get(ctx, roleKey, &role)).To(Succeed())
+		Expect(role.Labels).To(HaveKeyWithValue(metadata.ClusterLabelName, clusterName))
+		Expect(secretNamesFromRole(&role)).To(ContainElement(oldSecretName))
+
+		By("creating a new secret with the same credentials")
+		newSecret := &corev1.Secret{
+			ObjectMeta: metav1.ObjectMeta{
+				Name:      newSecretName,
+				Namespace: namespace.Name,
+			},
+			Data: map[string][]byte{
+				"ACCESS_KEY_ID":     []byte("minio"),
+				"ACCESS_SECRET_KEY": []byte("minio123"),
+			},
+		}
+		Expect(cl.Create(ctx, newSecret)).To(Succeed())
+
+		By("updating the ObjectStore to reference the new secret")
+		Expect(cl.Get(ctx, types.NamespacedName{
+			Name:      objectStoreName,
+			Namespace: namespace.Name,
+		}, store)).To(Succeed())
+		store.Spec.Configuration.BarmanCredentials.AWS.AccessKeyIDReference.Name = newSecretName
+		store.Spec.Configuration.BarmanCredentials.AWS.SecretAccessKeyReference.Name = newSecretName
+		Expect(cl.Update(ctx, store)).To(Succeed())
+
+		By("waiting for the Role to reference the new secret")
+		Eventually(func(g Gomega) {
+			g.Expect(cl.Get(ctx, roleKey, &role)).To(Succeed())
+			g.Expect(secretNamesFromRole(&role)).To(ContainElement(newSecretName))
+			g.Expect(secretNamesFromRole(&role)).NotTo(ContainElement(oldSecretName))
+		}).WithTimeout(3 * time.Minute).WithPolling(5 * time.Second).Should(Succeed())
+	})
+})
+
+func newCluster(namespace string) *cloudnativepgv1.Cluster {
+	return &cloudnativepgv1.Cluster{
+		TypeMeta: metav1.TypeMeta{
+			Kind:       "Cluster",
+			APIVersion: "postgresql.cnpg.io/v1",
+		},
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      clusterName,
+			Namespace: namespace,
+		},
+		Spec: cloudnativepgv1.ClusterSpec{
+			Instances:       1,
+			ImagePullPolicy: corev1.PullAlways,
+			Plugins: []cloudnativepgv1.PluginConfiguration{
+				{
+					Name: "barman-cloud.cloudnative-pg.io",
+					Parameters: map[string]string{
+						"barmanObjectName": objectStoreName,
+					},
+					IsWALArchiver: ptr.To(true),
+				},
+			},
+			StorageConfiguration: cloudnativepgv1.StorageConfiguration{
+				Size: "1Gi",
+			},
+		},
+	}
+}
+
+func secretNamesFromRole(role *rbacv1.Role) []string {
+	for _, rule := range role.Rules {
+		if len(rule.APIGroups) == 1 &&
+			rule.APIGroups[0] == "" &&
+			len(rule.Resources) == 1 &&
+			rule.Resources[0] == "secrets" {
+			return rule.ResourceNames
+		}
+	}
+
+	return nil
+}