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The Azure VM Extension for SAP collects performance metrics from Azure virtual machines (VMs) and forwards them to the SAP Host Agent so that SAP monitoring tools can report on system health. When the extension isn't working correctly, performance counters might be missing or empty, which can prevent you from identifying resource bottlenecks in your SAP environment.
This article helps you diagnose and resolve common issues with the extension on both Windows and Linux VMs, including missing performance counters, empty installation directories, and authentication errors.
Azure performance counters don't show up at all
The AzureEnhancedMonitoring process (Windows) or daemon (Linux), collects the performance metrics. If the process isn't running on your VM, the VM can't collect performance metrics.
Check the installation directory
Verify that the extension installation directory isn't empty.
- Windows: Check the directory
C:\Packages\Plugins\Microsoft.AzureCAT.AzureEnhancedMonitoring.MonitorX64Windows\<version>. - Linux: Check that
/var/lib/waagent/has a subdirectory for the Azure Extension for SAP.
If the directory is empty, the extension isn't installed. Determine whether the issue is proxy-related. You might need to restart the VM or install the VM extension again.
Some Azure performance counters are missing
Performance metrics are collected from several sources. Some configuration data is collected locally, and some performance metrics are read from Azure Monitor.
For a complete and up-to-date list of known issues, see SAP Note 1999351, which has extra troubleshooting information for the Azure Extension for SAP.
If troubleshooting by using SAP Note 1999351 doesn't resolve the issue, install the extension again. If the problem persists, open an SAP customer support message on the following component:
- Windows: BC-OP-NT-AZR
- Linux: BC-OP-LNX-AZR
Attach the relevant log file to the incident:
- Windows:
C:\Packages\Plugins\Microsoft.AzureCAT.AzureEnhancedMonitoring.MonitorX64Windows\<version>\logapp.txt - Linux:
/var/lib/waagent/Microsoft.AzureCAT.AzureEnhancedMonitoring.MonitorX64Linux-<version>/logapp.txt
Azure extension error codes
All error codes have a unique tag in the form of a-#, where # is a number. Use the tag to search for a specific error and its solution.
| Code | Error message | Solution |
|---|---|---|
| a-0116 | No auth token | The extension can't obtain an authentication token to access VM metrics in Azure Monitor. To deliver VM metrics, it needs access to VM resources like the VM itself, all disks, and all network interfaces attached to a VM. Enable a managed identity for the VM and assign it the Reader role for the VM's resource group. When you use a setup script, the script performs this action for you. Normally, you don't need to enable and assign a managed identity manually. |