Comment 10 for bug 1896438

@Billy, I personally disagree with the statement. In any case, we need to see the clear list of minimum expected functionality of OpenStack charms so we can avoid ambiguity.

For example:
- High-availability (with vip or DNS HA)
- TLS encryption for endpoints (with vault or ssl_* options)

and "use-internal-endpoint" should be one of them since if one charm is missing it then it will ruin the idea of having "use-internal-endpoint" by other charms and ruin the network segregation and design.

> Having "use-internal-endpoint" option or equivalent is one of the minimal expected feature set in OpenStack charms/services. Otherwise we have to put every single node/service onto an external/public network.