only remove the retention policy

Author: chkeita

src/ApiService/ApiService/onefuzzlib/AutoScale.cs

@@ -136,8 +136,10 @@ public async Async.Task<OneFuzzResultVoid> AddAutoScaleToVmss(ScalesetId vmss, A
         var workspaceId = _context.LogAnalytics.GetWorkspaceId().ToString();
         _logTracer.LogInformation("Setting up diagnostics for {AutoscaleResourceId} - {AutoscaleResourceName} - {WorkspaceId}", autoScaleResource.OkV.Id!, autoScaleResource.OkV.Data.Name, workspaceId);
 
-
-
+        var diagnosticsResource = await SetupAutoScaleDiagnostics(autoScaleResource.OkV, workspaceId);
+        if (!diagnosticsResource.IsOk) {
+            return OneFuzzResultVoid.Error(diagnosticsResource.ErrorV);
+        }
 
         return OneFuzzResultVoid.Ok;
     }
@@ -254,6 +256,35 @@ public AutoscaleProfile DefaultAutoScaleProfile(string queueUri, long scaleSetSi
         return CreateAutoScaleProfile(queueUri, 1L, scaleSetSize, scaleSetSize, 1, 10.0, 1, 5.0);
     }
 
+
+    private async Async.Task<OneFuzzResult<DiagnosticSettingsResource>> SetupAutoScaleDiagnostics(AutoscaleSettingResource autoscaleSettingResource, string logAnalyticsWorkspaceId) {
+        try {
+            // TODO: we are missing CategoryGroup = "allLogs", we cannot set it since current released dotnet SDK is missing the field
+            // The field is there in github though, so need to update this code once that code is released:
+            // https://github.com/Azure/azure-sdk-for-net/blob/main/sdk/monitor/Azure.ResourceManager.Monitor/src/Generated/Models/LogSettings.cs
+            // But setting logs one by one works the same as "allLogs" being set...
+
+            var parameters = new DiagnosticSettingsData {
+                WorkspaceId = logAnalyticsWorkspaceId
+            };
+
+            var diagnostics = await autoscaleSettingResource.GetDiagnosticSettings().CreateOrUpdateAsync(WaitUntil.Started, $"{autoscaleSettingResource.Data.Name}-diagnostics", parameters);
+            if (diagnostics != null && diagnostics.HasValue) {
+                return OneFuzzResult.Ok(diagnostics.Value);
+            }
+            return OneFuzzResult<DiagnosticSettingsResource>.Error(
+                ErrorCode.UNABLE_TO_CREATE,
+                $"The resulting diagnostics settings resource was null when attempting to create for {autoscaleSettingResource.Id}"
+            );
+        } catch (Exception ex) {
+            _logTracer.LogError(ex, "SetupAutoScaleDiagnostics");
+            return OneFuzzResult<DiagnosticSettingsResource>.Error(
+                    ErrorCode.UNABLE_TO_CREATE,
+                    $"unable to setup diagnostics for auto-scale resource: {autoscaleSettingResource.Id} and name: {autoscaleSettingResource.Data.Name}"
+                );
+        }
+    }
+
     public OneFuzzResult<AutoscaleSettingResource?> GetAutoscaleSettings(ScalesetId vmss) {
         _logTracer.LogInformation("Checking scaleset {ScalesetId} for existing auto scale resource", vmss);
         try {