Today, all Omicron zones that have an external IP address are assumed to have exactly one of them. For example, this is the one IP address that Nexus listens on. This isn't flexible enough to support things like dual IPv4 and IPv6 deployments of the same service. Note that it's also not enough to have one IP of each version (even an optional one), since it's plausible that operators want to make services available on multiple disjoint networks.
There's a lot of work needed to make this happen, tracked by individual issues below.
Today, all Omicron zones that have an external IP address are assumed to have exactly one of them. For example, this is the one IP address that Nexus listens on. This isn't flexible enough to support things like dual IPv4 and IPv6 deployments of the same service. Note that it's also not enough to have one IP of each version (even an optional one), since it's plausible that operators want to make services available on multiple disjoint networks.
There's a lot of work needed to make this happen, tracked by individual issues below.