Error "ERR_SSL_PROTOCOL_ERROR" when attempting to access VAMI portal of VCF Usage Meter

Products

• VMware Usage Meter

Issue/Introduction

• Usage Meter(UM) is upgraded from 4.8 to 9.x
• Attempting to access VAMI portal of VCF Usage Meter(<https://UM-IP or FQDN:5480> fails with error "ERR_SSL_PROTOCOL_ERROR":
  
  
  
  
  

Environment

VCF Usage Meter 9.x

Cause

This issue occurs when the "certificate subject alternative name" of SSL certificate does not contain hostname/IP address of Usage Meter or the 'certificate subject alternative name' field itself is missing from the SSL certificate.

Resolution

To resolve this issue, 

1. SSH to Usage Meter appliance and ensure hostname is correctly set by running the following command: hostname
2. If the hostname is not configured, set the hostname using the command: setup-hostname.sh <hostname in lowercase>
3. Regenerate the SSL certificates following the instructions provided here: VCF Usage Meter Certificate Management .