fix region for multi metricnames

public/app/plugins/datasource/azuremonitor/components/MetricsQueryEditor/dataHooks.ts

@@ -128,7 +128,8 @@ const defaultMetricMetadata: MetricMetadata = {
 export const useMetricMetadata = (query: AzureMonitorQuery, datasource: Datasource, onChange: OnChangeFn) => {
   const [metricMetadata, setMetricMetadata] = useState<MetricMetadata>(defaultMetricMetadata);
   const { subscription } = query;
-  const { resources, metricNamespace, metricName, aggregation, timeGrain, customNamespace } = query.azureMonitor ?? {};
+  const { resources, metricNamespace, metricName, aggregation, timeGrain, customNamespace, region } =
+    query.azureMonitor ?? {};
   const { resourceGroup, resourceName } = getResourceGroupAndName(resources);
   const multipleResources = (resources && resources.length > 1) ?? false;
 
@@ -138,11 +139,11 @@ export const useMetricMetadata = (query: AzureMonitorQuery, datasource: Datasour
       setMetricMetadata(defaultMetricMetadata);
       return;
     }
-
     datasource.azureMonitorDatasource
       .getMetricMetadata(
         { subscription, resourceGroup, resourceName, metricNamespace, metricName, customNamespace },
-        multipleResources
+        multipleResources,
+        region
       )
       .then((metadata) => {
         // TODO: Move the aggregationTypes and timeGrain defaults into `getMetricMetadata`
@@ -161,6 +162,7 @@ export const useMetricMetadata = (query: AzureMonitorQuery, datasource: Datasour
         });
       });
   }, [
+    region,
     datasource,
     subscription,
     resourceGroup,

public/app/plugins/datasource/azuremonitor/resourcePicker/resourcePickerData.ts

@@ -1,7 +1,7 @@
 import { uniq } from 'lodash';
 
 import { DataSourceInstanceSettings } from '@grafana/data';
-import { DataSourceWithBackend } from '@grafana/runtime';
+import { DataSourceWithBackend, reportInteraction } from '@grafana/runtime';
 
 import { logsResourceTypes, resourceTypeDisplayNames } from '../azureMetadata';
 import AzureMonitorDatasource from '../azure_monitor/azure_monitor_datasource';
@@ -359,6 +359,7 @@ export default class ResourcePickerData extends DataSourceWithBackend<AzureMonit
 
   private async fetchAllNamespaces() {
     const subscriptions = await this.getSubscriptions();
+    reportInteraction('grafana_ds_azuremonitor_subscriptions_loaded', { subscriptions: subscriptions.length });
     let supportedMetricNamespaces: string[] = [];
     for await (const subscription of subscriptions) {
       const namespaces = await this.azureMonitorDatasource.getMetricNamespaces(