You want your app to connect to its private-tier Heroku Postgres or Heroku Redis during deploy and build but the app reports errors like
ETIMEDOUT and can not connect to the private datastore.
Private Spaces apps are built outside of the Spaces. This makes it impossible to reach the Private datastore protected inside the Private Space while the app is being built and deployed.
If possible, eliminate the dependency on your private datastore during build time or use a datastore in Common Runtime. It maybe possible to make use of Release Phase to run tasks like database migrations on a one-off dyno in the Private Space after the build but before the deploy.
Otherwise, Pipelines maybe of your help:
- Create a pipeline and create a Common Runtime app in staging with public datastores
- Add the Private Space app in production
- Deploy to staging
- Promote the staging app to production