When you omit internal_port
in your fly.toml
you get the default of 8080
, as expected. However, the part of the deployment process that checks for a running app appears to default to port 0
(Go’s default value?):
WARNING The app is not listening on the expected address and will not be reachable by fly-proxy.
You can fix this by configuring your app to listen on the following addresses:
- 0.0.0.0:0
(Yes, the app works with or without explicit internal_port
.)