I’m trying to wrap my head around the endpoint configuration, especially in prod settings.
Generally I have something like this:
config :btest, BtestWeb.Endpoint,
url: [host: "localhost", port: 4480, scheme: "http"],
http: [
# Enable IPv6 and bind on all interfaces.
# Set it to {0, 0, 0, 0, 0, 0, 0, 1} for local network only access.
# See the documentation on https://hexdocs.pm/bandit/Bandit.html#t:options/0
# for details about using IPv6 vs IPv4 and loopback vs public addresses.
ip: {127, 0, 0, 1},
port: port
],
The idea is to have the Phoenix app behind an nginx load balancer, offloading the SSL handshake to it, I’d say not a very unusual set up if you want to run more than one app on the same server. I do care only about binding to localhost on a certain port and that’s that.
What I can’t understand: I can set the port variable to a different value than the one hardcoded in the url , let’s say 4481. The server goes up, but the messages are a little bit confusing:
[info] Running BtestWeb.Endpoint with Bandit 1.6.10 at 127.0.0.1:4481 (http)
[info] Access BtestWeb.Endpoint at http://localhost:4480
Actually, it listens on 4481 only.
So, my questions are:
- why do I need the port two times, and what parts of the Endpoint are configured via these two options? (I tried to look in the code with no success)
- In which specific situation I would need to provide a different value for the port in
httpand the one configured via the env variable?
