OpenShift's integrated image registry warning - No HTTP secret provided

Issue

The following message occurs when trying to scale up the internal registry:

time="2017-02-17T13:35:56.187118838Z"level=warning msg="No HTTP secret provided - generated random secret. This may cause problems with uploads if multiple registries are behind a load-balancer. To provide a shared secret, fill in http.secret in the configuration file or set the REGISTRY_HTTP_SECRET environment variable." go.version=go1.6.3 instance.id=7e662707-cefd-4599-9a92-99e73285e981