Integrate a migration-detector middleware

This attempts to detect if there are migrations in-progress and will
force display an interstitial page in the process that attempts to
load the index page every 10s until it succeeds.

This is only attached in production settings so the development
environment can proceed even if the migrations haven't been applied yet

.gitignore

@@ -21,6 +21,7 @@ awx/ui/static
 awx/ui/build_test
 awx/ui/client/languages
 awx/ui/templates/ui/index.html
+awx/ui/templates/ui/installing.html
 
 # Tower setup playbook testing
 setup/test/roles/postgresql

awx/main/middleware.py

@@ -9,11 +9,13 @@ import six
 from django.conf import settings
 from django.contrib.auth.models import User
 from django.db.models.signals import post_save
-from django.db import IntegrityError
+from django.db.migrations.executor import MigrationExecutor
+from django.db import IntegrityError, connection
 from django.utils.functional import curry
-from django.shortcuts import get_object_or_404
+from django.shortcuts import get_object_or_404, redirect
 from django.apps import apps
 from django.utils.translation import ugettext_lazy as _
+from django.core.urlresolvers import reverse
 
 from awx.main.models import ActivityStream
 from awx.api.authentication import TokenAuthentication
@@ -162,3 +164,12 @@ class URLModificationMiddleware(object):
         if request.path_info != new_path:
             request.path = request.path.replace(request.path_info, new_path)
             request.path_info = new_path
+
+
+class MigrationRanCheckMiddleware(object):
+
+    def process_request(self, request):
+        executor = MigrationExecutor(connection)
+        plan = executor.migration_plan(executor.loader.graph.leaf_nodes())
+        if bool(plan) and 'migrations_notran' not in request.path:
+            return redirect(reverse("ui:migrations_notran"))

awx/settings/production.py

@@ -87,6 +87,8 @@ settings_files = os.path.join(settings_dir, '*.py')
 settings_file = os.environ.get('AWX_SETTINGS_FILE',
                                '/etc/tower/settings.py')
 
+MIDDLEWARE_CLASSES = ('awx.main.middleware.MigrationRanCheckMiddleware',) + MIDDLEWARE_CLASSES
+
 # Attempt to load settings from /etc/tower/settings.py first, followed by
 # /etc/tower/conf.d/*.py.
 try:

awx/sso/middleware.py

@@ -34,7 +34,7 @@ class SocialAuthMiddleware(SocialAuthExceptionMiddleware):
         if not hasattr(request, 'successful_authenticator'):
             request.successful_authenticator = None
 
-        if not request.path.startswith('/sso/'):
+        if not request.path.startswith('/sso/') and 'migrations_notran' not in request.path:
 
             # If token isn't present but we still have a user logged in via Django
             # sessions, log them out.

awx/ui/build/webpack.base.js

@@ -25,6 +25,8 @@ const APP_ENTRY = path.join(SOURCE_PATH, 'app.js');
 const VENDOR_ENTRY = path.join(SOURCE_PATH, 'vendor.js');
 const INDEX_ENTRY = path.join(CLIENT_PATH, 'index.template.ejs');
 const INDEX_OUTPUT = path.join(UI_PATH, 'templates/ui/index.html');
+const INSTALL_RUNNING_ENTRY = path.join(CLIENT_PATH, 'installing.template.ejs')
+const INSTALL_RUNNING_OUTPUT = path.join(UI_PATH, 'templates/ui/installing.html');
 const THEME_ENTRY = path.join(LIB_PATH, 'theme', 'index.less');
 const OUTPUT = 'js/[name].[hash].js';
 const CHUNKS = ['vendor', 'app'];
@@ -168,6 +170,19 @@ let base = {
                 moduleA.files.sort((fileA, fileB) => fileA.includes('js') ? -1 : 1)
                 moduleB.files.sort((fileA, fileB) => fileA.includes('js') ? -1 : 1)
 
+                return moduleA.names[0] === 'vendor' ? -1 : 1
+            }
+        }),
+        new HtmlWebpackPlugin({
+            alwaysWriteToDisk: true,
+            template: INSTALL_RUNNING_ENTRY,
+            filename: INSTALL_RUNNING_OUTPUT,
+            inject: false,
+            chunks: CHUNKS,
+            chunksSortMode: (moduleA, moduleB) => {
+                moduleA.files.sort((fileA, fileB) => fileA.includes('js') ? -1 : 1)
+                moduleB.files.sort((fileA, fileB) => fileA.includes('js') ? -1 : 1)
+
                 return moduleA.names[0] === 'vendor' ? -1 : 1
             }
         })

awx/ui/client/installing.template.ejs

@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<html lang="en" ng-app="awApp">
+  <head>
+    {% load staticfiles %}
+    <meta charset="utf-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <link rel="shortcut icon" href="{{ STATIC_URL }}assets/favicon.ico?v={{version}}" />
+    <title ng-bind="tabTitle"></title>
+    <% htmlWebpackPlugin.files.css.forEach(file => {%>
+        <link href="{{ STATIC_URL }}<%= file %>" rel="stylesheet" />
+    <% }) %>
+    <% htmlWebpackPlugin.files.js.forEach(file => {%>
+        <script src="{{ STATIC_URL }}<%= file %>"></script>
+    <% }) %>
+    <script>
+        setInterval(function() {
+        window.location = '/#/index.html';
+        }, 10000);
+    </script>
+  </head>
+  <body>
+    <div class="jumbotron">
+      <div class="container-fluid" id="content-container">
+        <div class="span4">
+          <img style="float:left" src="{% static 'assets/logo-header.svg' %}" width="200"/>
+          <div class="content-heading"><h1>AWX is Upgrading</h1></div>
+          <p>
+            AWX is currently upgrading or installing, this page will refresh when done.
+          </p>
+        </div>
+      </div>
+    </div>
+  </body>
+</html>

awx/ui/urls.py

@@ -6,5 +6,6 @@ from django.conf.urls import *
 
 urlpatterns = patterns('awx.ui.views',
     url(r'^$', 'index', name='index'),
+    url(r'^migrations_notran/$', 'migrations_notran', name='migrations_notran'),
     url(r'^portal/$', 'portal_redirect', name='portal_redirect'),
 )

awx/ui/views.py

@@ -20,3 +20,9 @@ class PortalRedirectView(RedirectView):
     url = '/#/portal'
 
 portal_redirect = PortalRedirectView.as_view()
+
+class MigrationsNotran(TemplateView):
+
+    template_name = 'ui/installing.html'
+
+migrations_notran = MigrationsNotran.as_view()