Feature: Take some of the parameters from the Environment so that it can work in a containerized environment

brewman/__init__.py

@@ -1,6 +1,8 @@
 import datetime
+import os
 from pyramid.config import Configurator
 from sqlalchemy import engine_from_config
+from sqlalchemy.engine.url import make_url
 
 from pyramid.authentication import AuthTktAuthenticationPolicy
 from pyramid.authorization import ACLAuthorizationPolicy
@@ -10,16 +12,23 @@ from brewman.models import initialize_sql
 from brewman.renderers import json_renderer, CSVRenderer
 from brewman.security import groupfinder
 
-current_table = 1
-
-
 def main(global_config, **settings):
     """ This function returns a Pyramid WSGI application.
     """
+    if 'sqlalchemy.url' not in settings:
+        DB_NAME = os.environ['DB_NAME']
+        DB_USER = os.environ['DB_USER']
+        DB_PASS = os.environ['DB_PASS']
+        DB_URI = 'postgresql://{0}:{1}@postgres:5432/{2}'.format(
+            DB_USER, DB_PASS, DB_NAME
+        )
+
+        settings['sqlalchemy.url']= DB_URI
     engine = engine_from_config(settings, 'sqlalchemy.')
     initialize_sql(engine)
 
-    session_factory = SignedCookieSessionFactory('secret')
+    SECRET_KEY = os.environ.get('SECRET_KEY', settings.get('secret_key', ''))
+    session_factory = SignedCookieSessionFactory(SECRET_KEY)
 
     authentication_policy = AuthTktAuthenticationPolicy('brewman', timeout=900, reissue_time=90, callback=groupfinder)
     authorization_policy = ACLAuthorizationPolicy()