Set Kafka envs on runtime instead of compile time

config/runtime.exs

@@ -13,19 +13,7 @@ if System.get_env("PHX_SERVER") && System.get_env("RELEASE_NAME") do
 end
 
 if config_env() == :prod do
-  # The secret key base is used to sign/encrypt cookies and other secrets.
-  # A default value is used in config/dev.exs and config/test.exs but you
-  # want to use a different value for prod and you most likely don't want
-  # to check this value into version control, so we use an environment
-  # variable instead.
-  secret_key_base =
-    System.get_env("SECRET_KEY_BASE") ||
-      raise """
-      environment variable SECRET_KEY_BASE is missing.
-      You can generate one by calling: mix phx.gen.secret
-      """
-
-  host = System.get_env("PHX_HOST") || "example.com"
+  host = System.get_env("PHX_HOST") || "localhost"
   port = String.to_integer(System.get_env("PORT") || "4000")
 
   config :kafkaex_lag_exporter, KafkaexLagExporterWeb.Endpoint,
@@ -37,8 +25,7 @@ if config_env() == :prod do
       # for details about using IPv6 vs IPv4 and loopback vs public addresses.
       ip: {0, 0, 0, 0, 0, 0, 0, 0},
       port: port
-    ],
-    secret_key_base: secret_key_base
+    ]
 
   # ## Using releases
   #
@@ -50,3 +37,14 @@ if config_env() == :prod do
   # Then you can assemble a release by calling `mix release`.
   # See `mix help release` for more information.
 end
+
+{port, _} = System.fetch_env!("KAFKA_BROKER_PORT")
+  |> Integer.parse
+
+config :kafka_ex,
+       brokers: [
+         {System.fetch_env!("KAFKA_BROKER1_HOST"), port},
+         {System.fetch_env!("KAFKA_BROKER2_HOST"), port},
+         {System.fetch_env!("KAFKA_BROKER3_HOST"), port},
+       ]
+