Configuration of the Webhook plugin in Aria Operations fails with the error: 'Test was not successful: Failed to post to the server.'

Products

• VCF Operations

Issue/Introduction

• When attempting to test the connection during Webhook plugin configuration in VMware Aria Operations, the following error is encountered:
  
• Error messages similar to the following appear in /storage/log/vcops/log/analytics-***.log file indicate a failure to connect to the Microsoft Teams webhook endpoint, with the following error:

Failed to send Webhook: org.apache.http.conn.HttpHostConnectException: Connect to webhook@domain:443 [webhook@domain/##.##.##.##.
####:####:####:####:####:####:####:####] failed: Network is unreachable (connect failed)

Environment

VMware Aria Operations 8.x

Cause

This error occurs due to the inability of Aria Operations to establish a connection to the Microsoft Teams webhook endpoint over port 443. This network-level issue prevents the Webhook plugin from successfully posting alert notifications.

Resolution

• Ensure network connectivity from the Aria Operations appliance to the Microsoft Teams webhook endpoint over port 443 (HTTPS). Connectivity can be confirmed using the command "curl -v telnet://webhook@domain: 443"

• Reconfigure the Webhook plugin by following the steps outlined in the official VMware documentation: Adding Outbound Notification Plug-Ins in VMware Aria Operations

• If the issue persists, engage network or endpoint team to verify why the webhook endpoint is refusing connections from the Aria Operations.