Telegraf Agent Installation Fails with "PrerequisiteCheckException: ESXi port connectivity check failed for esxfqdn:443" in Aria Operations"

Products

• VMware Aria Operations (formerly vRealize Operations) 8.x

Issue/Introduction

• When attempting to install the Telegraf agent on a virtual machine (VM) from Aria Operations UI, the operation fails with the following error message:

PrerequisiteCheckException: ESXi port connectivity check failed for esxfqdn:443

• This issue affects both Windows and Linux virtual machines.

Environment

• Aria Operations 8.x and above
• Operating systems: Windows and Linux

Cause

This issue can occur due to any of the following reasons:

• The VM on which the telegraph agent is being installed is unable to resolve the Cloud Proxy hostname.
• Cloud proxy cannot connect to the ESXi host where the target VM is hosted over port 443

Resolution

1. Verify Port Connectivity: Ensure port 443 is open between the Cloud Proxy and the ESXi host where the target VM resides. 
2. Update DNS/Hosts File: Add the Cloud Proxy entry to the DNS hosts file on the source VM where the Telegraf Agent is being installed.

Additional Information

Communication with Cloud Proxy and vCenter Server