fix(deps): update k8s.io/utils digest to 914a6e7

| datasource | package      | from                               | to                                 |
| ---------- | ------------ | ---------------------------------- | ---------------------------------- |
| go         | k8s.io/utils | v0.0.0-20251222233032-718f0e51e6d2 | v0.0.0-20260108192941-914a6e750570 |


Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.wordlist.txt

@@ -1,3 +1,4 @@
+AKS
 AccessDenied
 AdditionalContainerArgs
 Akamai
@@ -5,6 +6,7 @@ Azurite
 BarmanObjectStore
 BarmanObjectStoreConfiguration
 BarmanObjectStores
+CLI
 CNCF
 CRD
 CloudNativePG
@@ -38,6 +40,7 @@ PITR
 PoR
 PostgreSQL
 Postgres
+PowerShell
 README
 RPO
 RTO
@@ -45,6 +48,7 @@ RecoveryWindow
 ResourceRequirements
 RetentionPolicy
 SAS
+SDK
 SFO
 SPDX
 SPDX

config/crd/bases/barmancloud.cnpg.io_objectstores.yaml

@@ -108,6 +108,11 @@ spec:
                         - key
                         - name
                         type: object
+                      useDefaultAzureCredentials:
+                        description: |-
+                          Use the default Azure authentication flow, which includes DefaultAzureCredential.
+                          This allows authentication using environment variables and managed identities.
+                        type: boolean
                     type: object
                   data:
                     description: |-

go.mod

@@ -7,7 +7,7 @@ toolchain go1.25.5
 require (
 	github.com/cert-manager/cert-manager v1.19.2
 	github.com/cloudnative-pg/api v1.28.0
-	github.com/cloudnative-pg/barman-cloud v0.4.0
+	github.com/cloudnative-pg/barman-cloud v0.4.1-0.20260108104508-ced266c145f5
 	github.com/cloudnative-pg/cloudnative-pg v1.28.0
 	github.com/cloudnative-pg/cnpg-i v0.3.1
 	github.com/cloudnative-pg/cnpg-i-machinery v0.4.2
@@ -22,7 +22,7 @@ require (
 	k8s.io/apiextensions-apiserver v0.35.0
 	k8s.io/apimachinery v0.35.0
 	k8s.io/client-go v0.35.0
-	k8s.io/utils v0.0.0-20251222233032-718f0e51e6d2
+	k8s.io/utils v0.0.0-20260108192941-914a6e750570
 	sigs.k8s.io/controller-runtime v0.22.4
 	sigs.k8s.io/kustomize/api v0.21.0
 	sigs.k8s.io/kustomize/kyaml v0.21.0

go.sum

@@ -18,8 +18,8 @@ github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UF
 github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/cloudnative-pg/api v1.28.0 h1:xElzHliO0eKkVQafkfMhDJo0aIRCmB1ItEt+SGh6B58=
 github.com/cloudnative-pg/api v1.28.0/go.mod h1:puXJBOsEaJd8JLgvCtxgl2TO/ZANap/z7bPepKRUgrk=
-github.com/cloudnative-pg/barman-cloud v0.4.0 h1:V4ajM5yDWq2m+TxmnDtCBGmfMXAxbXr9k7lfR4jM+eE=
+github.com/cloudnative-pg/barman-cloud v0.4.1-0.20260108104508-ced266c145f5 h1:wPB7VTNgTv6t9sl4QYOBakmVTqHnOdKUht7Q3aL+uns=
-github.com/cloudnative-pg/barman-cloud v0.4.0/go.mod h1:AWdyNP2jvMO1c7eOOwT8kT+QGyK5O7lEBZX12LEZ1Ic=
+github.com/cloudnative-pg/barman-cloud v0.4.1-0.20260108104508-ced266c145f5/go.mod h1:qD0NtJOllNQbRB0MaleuHsZjFYaXtXfdg0HbFTbuHn0=
 github.com/cloudnative-pg/cloudnative-pg v1.28.0 h1:vkv0a0ewDSfJOPJrsyUr4uczsxheReAWf/k171V0Dm0=
 github.com/cloudnative-pg/cloudnative-pg v1.28.0/go.mod h1:209fkRR6m0vXUVQ9Q498eAPQqN2UlXECbXXtpGsZz3I=
 github.com/cloudnative-pg/cnpg-i v0.3.1 h1:fKj8NoToWI11HUL2UWYJBpkVzmaTvbs3kDMo7wQF8RU=
@@ -326,8 +326,8 @@ k8s.io/klog/v2 v2.130.1 h1:n9Xl7H1Xvksem4KFG4PYbdQCQxqc/tTUyrgXaOhHSzk=
 k8s.io/klog/v2 v2.130.1/go.mod h1:3Jpz1GvMt720eyJH1ckRHK1EDfpxISzJ7I9OYgaDtPE=
 k8s.io/kube-openapi v0.0.0-20251125145642-4e65d59e963e h1:iW9ChlU0cU16w8MpVYjXk12dqQ4BPFBEgif+ap7/hqQ=
 k8s.io/kube-openapi v0.0.0-20251125145642-4e65d59e963e/go.mod h1:kdmbQkyfwUagLfXIad1y2TdrjPFWp2Q89B3qkRwf/pQ=
-k8s.io/utils v0.0.0-20251222233032-718f0e51e6d2 h1:OfgiEo21hGiwx1oJUU5MpEaeOEg6coWndBkZF/lkFuE=
+k8s.io/utils v0.0.0-20260108192941-914a6e750570 h1:JT4W8lsdrGENg9W+YwwdLJxklIuKWdRm+BC+xt33FOY=
-k8s.io/utils v0.0.0-20251222233032-718f0e51e6d2/go.mod h1:xDxuJ0whA3d0I4mf/C4ppKHxXynQ+fxnkmQH0vTHnuk=
+k8s.io/utils v0.0.0-20260108192941-914a6e750570/go.mod h1:xDxuJ0whA3d0I4mf/C4ppKHxXynQ+fxnkmQH0vTHnuk=
 sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.33.0 h1:qPrZsv1cwQiFeieFlRqT627fVZ+tyfou/+S5S0H5ua0=
 sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.33.0/go.mod h1:Ve9uj1L+deCXFrPOk1LpFXqTg7LCFzFso6PA48q/XZw=
 sigs.k8s.io/controller-runtime v0.22.4 h1:GEjV7KV3TY8e+tJ2LCTxUTanW4z/FmNB7l327UfMq9A=

internal/cnpgi/operator/specs/secrets.go

@@ -37,6 +37,9 @@ func CollectSecretNamesFromCredentials(barmanCredentials *barmanapi.BarmanCreden
 		)
 	}
 	if barmanCredentials.Azure != nil {
+		// When using default Azure credentials or managed identity, no secrets are required
+		if !barmanCredentials.Azure.UseDefaultAzureCredentials &&
+			!barmanCredentials.Azure.InheritFromAzureAD {
 			references = append(
 				references,
 				barmanCredentials.Azure.ConnectionString,
@@ -45,6 +48,7 @@ func CollectSecretNamesFromCredentials(barmanCredentials *barmanapi.BarmanCreden
 				barmanCredentials.Azure.StorageSasToken,
 			)
 		}
+	}
 	if barmanCredentials.Google != nil {
 		references = append(
 			references,

internal/cnpgi/operator/specs/secrets_test.go

@@ -0,0 +1,227 @@
+/*
+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 (
+	barmanapi "github.com/cloudnative-pg/barman-cloud/pkg/api"
+	machineryapi "github.com/cloudnative-pg/machinery/pkg/api"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("CollectSecretNamesFromCredentials", func() {
+	Context("when collecting secrets from AWS credentials", func() {
+		It("should return secret names from S3 credentials", func() {
+			credentials := &barmanapi.BarmanCredentials{
+				AWS: &barmanapi.S3Credentials{
+					AccessKeyIDReference: &machineryapi.SecretKeySelector{
+						LocalObjectReference: machineryapi.LocalObjectReference{
+							Name: "aws-secret",
+						},
+						Key: "access-key-id",
+					},
+					SecretAccessKeyReference: &machineryapi.SecretKeySelector{
+						LocalObjectReference: machineryapi.LocalObjectReference{
+							Name: "aws-secret",
+						},
+						Key: "secret-access-key",
+					},
+				},
+			}
+
+			secrets := CollectSecretNamesFromCredentials(credentials)
+			Expect(secrets).To(ContainElement("aws-secret"))
+		})
+
+		It("should handle nil AWS credentials", func() {
+			credentials := &barmanapi.BarmanCredentials{}
+
+			secrets := CollectSecretNamesFromCredentials(credentials)
+			Expect(secrets).To(BeEmpty())
+		})
+	})
+
+	Context("when collecting secrets from Azure credentials", func() {
+		It("should return secret names when using explicit credentials", func() {
+			credentials := &barmanapi.BarmanCredentials{
+				Azure: &barmanapi.AzureCredentials{
+					ConnectionString: &machineryapi.SecretKeySelector{
+						LocalObjectReference: machineryapi.LocalObjectReference{
+							Name: "azure-secret",
+						},
+						Key: "connection-string",
+					},
+				},
+			}
+
+			secrets := CollectSecretNamesFromCredentials(credentials)
+			Expect(secrets).To(ContainElement("azure-secret"))
+		})
+
+		It("should return empty list when using UseDefaultAzureCredentials", func() {
+			credentials := &barmanapi.BarmanCredentials{
+				Azure: &barmanapi.AzureCredentials{
+					UseDefaultAzureCredentials: true,
+					ConnectionString: &machineryapi.SecretKeySelector{
+						LocalObjectReference: machineryapi.LocalObjectReference{
+							Name: "azure-secret",
+						},
+						Key: "connection-string",
+					},
+				},
+			}
+
+			secrets := CollectSecretNamesFromCredentials(credentials)
+			Expect(secrets).To(BeEmpty())
+		})
+
+		It("should return empty list when using InheritFromAzureAD", func() {
+			credentials := &barmanapi.BarmanCredentials{
+				Azure: &barmanapi.AzureCredentials{
+					InheritFromAzureAD: true,
+				},
+			}
+
+			secrets := CollectSecretNamesFromCredentials(credentials)
+			Expect(secrets).To(BeEmpty())
+		})
+
+		It("should return secret names for storage account and key", func() {
+			credentials := &barmanapi.BarmanCredentials{
+				Azure: &barmanapi.AzureCredentials{
+					StorageAccount: &machineryapi.SecretKeySelector{
+						LocalObjectReference: machineryapi.LocalObjectReference{
+							Name: "azure-storage",
+						},
+						Key: "account-name",
+					},
+					StorageKey: &machineryapi.SecretKeySelector{
+						LocalObjectReference: machineryapi.LocalObjectReference{
+							Name: "azure-storage",
+						},
+						Key: "account-key",
+					},
+				},
+			}
+
+			secrets := CollectSecretNamesFromCredentials(credentials)
+			Expect(secrets).To(ContainElement("azure-storage"))
+		})
+	})
+
+	Context("when collecting secrets from Google credentials", func() {
+		It("should return secret names from Google credentials", func() {
+			credentials := &barmanapi.BarmanCredentials{
+				Google: &barmanapi.GoogleCredentials{
+					ApplicationCredentials: &machineryapi.SecretKeySelector{
+						LocalObjectReference: machineryapi.LocalObjectReference{
+							Name: "google-secret",
+						},
+						Key: "credentials.json",
+					},
+				},
+			}
+
+			secrets := CollectSecretNamesFromCredentials(credentials)
+			Expect(secrets).To(ContainElement("google-secret"))
+		})
+	})
+
+	Context("when collecting secrets from multiple cloud providers", func() {
+		It("should return secret names from all providers", func() {
+			credentials := &barmanapi.BarmanCredentials{
+				AWS: &barmanapi.S3Credentials{
+					AccessKeyIDReference: &machineryapi.SecretKeySelector{
+						LocalObjectReference: machineryapi.LocalObjectReference{
+							Name: "aws-secret",
+						},
+						Key: "access-key-id",
+					},
+				},
+				Azure: &barmanapi.AzureCredentials{
+					ConnectionString: &machineryapi.SecretKeySelector{
+						LocalObjectReference: machineryapi.LocalObjectReference{
+							Name: "azure-secret",
+						},
+						Key: "connection-string",
+					},
+				},
+				Google: &barmanapi.GoogleCredentials{
+					ApplicationCredentials: &machineryapi.SecretKeySelector{
+						LocalObjectReference: machineryapi.LocalObjectReference{
+							Name: "google-secret",
+						},
+						Key: "credentials.json",
+					},
+				},
+			}
+
+			secrets := CollectSecretNamesFromCredentials(credentials)
+			Expect(secrets).To(ContainElements("aws-secret", "azure-secret", "google-secret"))
+		})
+
+		It("should skip Azure secrets when using UseDefaultAzureCredentials with other providers", func() {
+			credentials := &barmanapi.BarmanCredentials{
+				AWS: &barmanapi.S3Credentials{
+					AccessKeyIDReference: &machineryapi.SecretKeySelector{
+						LocalObjectReference: machineryapi.LocalObjectReference{
+							Name: "aws-secret",
+						},
+						Key: "access-key-id",
+					},
+				},
+				Azure: &barmanapi.AzureCredentials{
+					UseDefaultAzureCredentials: true,
+					ConnectionString: &machineryapi.SecretKeySelector{
+						LocalObjectReference: machineryapi.LocalObjectReference{
+							Name: "azure-secret",
+						},
+						Key: "connection-string",
+					},
+				},
+			}
+
+			secrets := CollectSecretNamesFromCredentials(credentials)
+			Expect(secrets).To(ContainElement("aws-secret"))
+			Expect(secrets).NotTo(ContainElement("azure-secret"))
+		})
+	})
+
+	Context("when handling nil references", func() {
+		It("should skip nil secret references", func() {
+			credentials := &barmanapi.BarmanCredentials{
+				AWS: &barmanapi.S3Credentials{
+					AccessKeyIDReference: &machineryapi.SecretKeySelector{
+						LocalObjectReference: machineryapi.LocalObjectReference{
+							Name: "aws-secret",
+						},
+						Key: "access-key-id",
+					},
+					SecretAccessKeyReference: nil,
+				},
+			}
+
+			secrets := CollectSecretNamesFromCredentials(credentials)
+			Expect(secrets).To(ContainElement("aws-secret"))
+			Expect(len(secrets)).To(Equal(1))
+		})
+	})
+})

internal/cnpgi/operator/specs/suite_test.go

@@ -0,0 +1,32 @@
+/*
+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 (
+	"testing"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+)
+
+func TestSpecs(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Specs Suite")
+}

manifest.yaml

@@ -107,6 +107,11 @@ spec:
                         - key
                         - name
                         type: object
+                      useDefaultAzureCredentials:
+                        description: |-
+                          Use the default Azure authentication flow, which includes DefaultAzureCredential.
+                          This allows authentication using environment variables and managed identities.
+                        type: boolean
                     type: object
                   data:
                     description: |-

web/docs/object_stores.md

@@ -29,6 +29,16 @@ the specific object storage provider you are using.
 
 The following sections detail the setup for each.
 
+:::note Authentication Methods
+The Barman Cloud Plugin does not independently test all authentication methods
+supported by `barman-cloud`. The plugin's responsibility is limited to passing
+the provided credentials to `barman-cloud`, which then handles authentication
+according to its own implementation. Users should refer to the
+[Barman Cloud documentation](https://docs.pgbarman.org/release/latest/) to
+verify that their chosen authentication method is supported and properly
+configured.
+:::
+
 ---
 
 ## AWS S3
@@ -230,14 +240,18 @@ is Microsoft’s cloud-based object storage solution.
 Barman Cloud supports the following authentication methods:
 
 - [Connection String](https://learn.microsoft.com/en-us/azure/storage/common/storage-configure-connection-string)
-- Storage Account Name + [Access Key](https://learn.microsoft.com/en-us/azure/storage/common/storage-account-keys-manage)
+- Storage Account Name + [Storage Account Access Key](https://learn.microsoft.com/en-us/azure/storage/common/storage-account-keys-manage)
-- Storage Account Name + [SAS Token](https://learn.microsoft.com/en-us/azure/storage/blobs/sas-service-create)
+- Storage Account Name + [Storage Account SAS Token](https://learn.microsoft.com/en-us/azure/storage/blobs/sas-service-create)
-- [Azure AD Workload Identity](https://azure.github.io/azure-workload-identity/docs/introduction.html)
+- [Azure AD Managed Identity](https://learn.microsoft.com/en-us/entra/identity/managed-identities-azure-resources/overview)
+- [Default Azure Credentials](https://learn.microsoft.com/en-us/dotnet/api/azure.identity.defaultazurecredential?view=azure-dotnet)
 
-### Azure AD Workload Identity
+### Azure AD Managed Identity
 
-This method avoids storing credentials in Kubernetes via the
+This method avoids storing credentials in Kubernetes by enabling the
-`.spec.configuration.inheritFromAzureAD` option:
+usage of [Azure Managed Identities](https://learn.microsoft.com/en-us/entra/identity/managed-identities-azure-resources/overview) authentication mechanism.
+This can be enabled by setting the `inheritFromAzureAD` option to `true`.
+Managed Identity can be configured for the AKS Cluster by following
+the [Azure documentation](https://learn.microsoft.com/en-us/azure/aks/use-managed-identity?pivots=system-assigned).
 
 ```yaml
 apiVersion: barmancloud.cnpg.io/v1
@@ -252,6 +266,36 @@ spec:
   [...]
 ```
 
+### Default Azure Credentials
+
+The `useDefaultAzureCredentials` option enables the default Azure credentials
+flow, which uses [`DefaultAzureCredential`](https://learn.microsoft.com/en-us/python/api/azure-identity/azure.identity.defaultazurecredential)
+to automatically discover and use available credentials in the following order:
+
+1. **Environment Variables** — `AZURE_CLIENT_ID`, `AZURE_CLIENT_SECRET`, and `AZURE_TENANT_ID` for Service Principal authentication
+2. **Managed Identity** — Uses the managed identity assigned to the pod
+3. **Azure CLI** — Uses credentials from the Azure CLI if available
+4. **Azure PowerShell** — Uses credentials from Azure PowerShell if available
+
+This approach is particularly useful for getting started with development and testing; it allows
+the SDK to attempt multiple authentication mechanisms seamlessly across different environments.
+However, this is not recommended for production. Please refer to the
+[official Azure guidance](https://learn.microsoft.com/en-us/dotnet/azure/sdk/authentication/credential-chains?tabs=dac#usage-guidance-for-defaultazurecredential)
+for a comprehensive understanding of `DefaultAzureCredential`.
+
+```yaml
+apiVersion: barmancloud.cnpg.io/v1
+kind: ObjectStore
+metadata:
+  name: azure-store
+spec:
+  configuration:
+    destinationPath: "<destination path here>"
+    azureCredentials:
+      useDefaultAzureCredentials: true
+  [...]
+```
+
 ### Access Key, SAS Token, or Connection String
 
 Store credentials in a Kubernetes secret: