[AKS] az aks create/update: Support UserAssigned Managed Identity f…

…or grafana linking in managed prometheus (#7886)

src/aks-preview/HISTORY.rst

@@ -9,6 +9,10 @@ If there is no rush to release a new version, please just add a description of t
 
 To release a new version, please select a new version number (usually plus 1 to last patch version, X.Y.Z -> Major.Minor.Patch, more details in `\doc <https://semver.org/>`_), and then add a new section named as the new version number in this file, the content should include the new modifications and everything from the *Pending* section. Finally, update the `VERSION` variable in `setup.py` with this new version number.
 
+7.0.0b7
++++++++
+* [AKS] `az aks create/update`: Support UserAssigned Managed Identity for grafana linking in managed prometheus
+
 7.0.0b6
 +++++++
 * Add `--advanced-networking-observability-tls-management` to `az aks create/update` command.

src/aks-preview/azext_aks_preview/azuremonitormetrics/amg/link.py

@@ -24,7 +24,22 @@ def link_grafana_instance(cmd, raw_parameters, azure_monitor_workspace_resource_
         grafanaURI = f"{cmd.cli_ctx.cloud.endpoints.resource_manager}{grafana_resource_id}?api-version={GRAFANA_API}"
         headers = ['User-Agent=azuremonitormetrics.link_grafana_instance']
         grafanaArmResponse = send_raw_request(cmd.cli_ctx, "GET", grafanaURI, body={}, headers=headers)
-        servicePrincipalId = grafanaArmResponse.json()["identity"]["principalId"]
+        # Check if 'identity' and 'type' exist in the response
+        identity_info = grafanaArmResponse.json().get("identity", {})
+        identity_type = identity_info.get("type", "").lower()
+
+        if identity_type == "systemassigned":
+            servicePrincipalId = identity_info.get("principalId")
+        elif identity_type == "userassigned":
+            user_assigned_identities = identity_info.get("userAssignedIdentities", {})
+            if not user_assigned_identities:
+                raise CLIError("No user-assigned identities found.")
+            servicePrincipalId = list(user_assigned_identities.values())[0]["principalId"]
+        else:
+            raise CLIError("Unsupported or missing identity type.")
+
+        if not servicePrincipalId:
+            raise CLIError("No service principal ID found for the specified identity.")
     except CLIError as e:
         raise CLIError(e)  # pylint: disable=raise-missing-from
     # Add Role Assignment

src/aks-preview/setup.py

@@ -9,7 +9,7 @@
 
 from setuptools import setup, find_packages
 
-VERSION = "7.0.0b6"
+VERSION = "7.0.0b7"
 
 CLASSIFIERS = [
     "Development Status :: 4 - Beta",