In pure IPv6 environments, Skyline Collector UI returns 502 Gateway error when logging in / using the interface

Products

• VMware

Issue/Introduction

Customer has deployed Skyline VA in a pure IPv6 environment

Symptoms:
Skyline Collector UI returns 502 Gateway error when logging in / using the interface

Cause

NGINX proxy server relies on “localhost” alias to route traffic to the underlying Collector service, without the need to know how networking is configured. This alias can sometimes be missing in the /etc/hosts configuration file, controlled by VAMI, therefore the nginx service may fail to start.

Resolution

Customers should verify if /etc/hosts file has “localhost” alias configured against the IPv6 looback interface, i.e. [::1]. If not, the customer can edit the hosts file and add the alias manually against the [::1] looback interface definition. Changes to the hosts file are applied immediately, however the customer should restart the nginx service by running the command:
systemctl restart nginx

There is no need to restart the collector service.