In the on-premises installation prerequisites [1] it would be good to mention that a valid HTTPS certificate needs to be configured in OpenShift for 3scale components to ensure everything functions properly.

For example, on the Integration page the generated curl command will not work as it is if there is a self-signed certificate on APIcast (in this case -k needs to be added to the curl.

[1] https://access.redhat.com/documentation/en-us/red_hat_3scale/2.2/html/infrastructure/onpremises-installation#prerequisites_3