Addon provider here: haven't heard anything official from Heroku on this, so this is my own personal speculation based on the current public Provider API. It seems that Heroku Postgres and Redis are available, and while they're _technically_ addons, they naturally have access to somewhat privileged APIs and architectural information that other addons do not have.
Currently, when an addon is provisioned, we're given a region identifier for the US East and EU public regions. My uninformed guess is that Private Spaces amounts to "your dynos run on servers in a private VPC." IF the Postgres and Redis integrations were "quick 'n dirty," they could very well get provisioned within the same VPC. However, it also seems plausible that AWS VPC peering can be used for other addons to provide their own Private Spaces support.
So it seems to me the question comes down to whether Heroku can (and/or _wants_ to) support VPC pairing with addons via their Provider API, so that other providers can provide their own private spaces.
> So it seems to me the question comes down to whether Heroku can (and/or _wants_ to) support VPC pairing with addons via their Provider API, so that other providers can provide their own private spaces.
Addon provider here: haven't heard anything official from Heroku on this, so this is my own personal speculation based on the current public Provider API. It seems that Heroku Postgres and Redis are available, and while they're _technically_ addons, they naturally have access to somewhat privileged APIs and architectural information that other addons do not have.
Currently, when an addon is provisioned, we're given a region identifier for the US East and EU public regions. My uninformed guess is that Private Spaces amounts to "your dynos run on servers in a private VPC." IF the Postgres and Redis integrations were "quick 'n dirty," they could very well get provisioned within the same VPC. However, it also seems plausible that AWS VPC peering can be used for other addons to provide their own Private Spaces support.
So it seems to me the question comes down to whether Heroku can (and/or _wants_ to) support VPC pairing with addons via their Provider API, so that other providers can provide their own private spaces.