Keystone to Keystone Federation Drop Down

This adds a dropdown to enable the user to switch Keystone providers using
Keystone to Keystone Federation.

Depends-On: I75b1a10a3b40b5544b60f6fdc060e0070c585977
Change-Id: Id39bf8d21c537347cbd23f63eaa3da8cc1bfff46
Implements: blueprint k2k-horizon

horizon/templates/horizon/common/_keystone_provider_selector.html

@@ -0,0 +1,20 @@
+{% load i18n %}
+{% if keystone_providers.support %}
+<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">
+    <span class="keystone-provider-title">{{ keystone_providers.current.name }}</span>
+    <span class="fa fa-caret-down"></span>
+</a>
+<ul id="keystone_provider_list" class="dropdown-menu dropdown-menu-right">
+<li class="dropdown-header">{% trans "Keystone Providers:" %}</li>
+{% for provider in keystone_providers.available %}
+   <li>
+     <a href="{% url 'switch_keystone_provider' provider.id %}?keystone_provider={{ provider.id|urlencode }}">
+       <span class="region-name dropdown-title">{{ provider.name }}</span>
+       {% if provider.name == keystone_providers.current.name %}
+       <span class="fa fa-check"></span>
+       {% endif %}
+     </a>
+   </li>
+{% endfor %}
+</ul>
+{% endif %}

openstack_dashboard/context_processors.py

@@ -55,6 +55,31 @@ def openstack(request):
                            'name': request.session.get('region_name')},
                'available': [{'endpoint': region[0], 'name':region[1]} for
                              region in available_regions]}
+
+    # K2K Federation Service Providers context/support
+    available_providers = request.session.get('keystone_providers', [])
+    if available_providers:
+        provider_id = request.session.get('keystone_provider_id', None)
+        provider_name = None
+        for provider in available_providers:
+            if provider['id'] == provider_id:
+                provider_name = provider.get('name')
+
+        keystone_providers = {
+            'support': len(available_providers) > 1,
+            'current': {
+                'name': provider_name,
+                'id': provider_id
+            },
+            'available': [
+                {'name': keystone_provider['name'],
+                 'id': keystone_provider['id']}
+                for keystone_provider in available_providers]
+        }
+    else:
+        keystone_providers = {'support': False}
+
+    context['keystone_providers'] = keystone_providers
     context['regions'] = regions
 
     # Adding webroot access

openstack_dashboard/local/local_settings.py.example

@@ -196,6 +196,14 @@ OPENSTACK_KEYSTONE_DEFAULT_ROLE = "_member_"
 #    "acme_saml2": ("acme", "saml2"),
 #}
 
+# The Keystone Provider drop down uses Keystone to Keystone federation
+# to switch between Keystone service providers.
+# Set display name for Identity Provider (dropdown display name)
+#KEYSTONE_PROVIDER_IDP_NAME = "Local Keystone"
+# This id is used for only for comparison with the service provider IDs. This ID
+# should not match any service provider IDs.
+#KEYSTONE_PROVIDER_IDP_ID = "localkeystone"
+
 # Disable SSL certificate checks (useful for self-signed certificates):
 #OPENSTACK_SSL_NO_VERIFY = True
 

openstack_dashboard/templates/header/_header.html

@@ -32,6 +32,7 @@
         {% if profiler_enabled %}
           {% include "developer/profiler/_mode_picker.html" %}
         {% endif %}
+        {% include "header/_keystone_provider_selection.html" %}
         {% include "header/_user_menu.html" %}
         {% include "header/_region_selection.html" %}
       </ul>

openstack_dashboard/templates/header/_keystone_provider_selection.html

@@ -0,0 +1,11 @@
+{% if not_list %}
+  <div class="dropdown">
+{% else %}
+  <li class="dropdown">
+{% endif %}
+  {% include "horizon/common/_keystone_provider_selector.html" %}
+{% if not_list %}
+  </div>
+{% else %}
+  </li>
+{% endif %}

releasenotes/notes/bp-k2k-horizon-9577253d626337c1.yaml

@@ -0,0 +1,11 @@
+---
+features:
+  - Added Keystone to Keystone (K2K) federation support in Horizon. If Keystone
+    is configured with K2K and has service providers, the list of
+    Keystone providers will appear in a dropdown. In local_settings.py you can
+    optionally set the identity provider display name with
+    ``KEYSTONE_PROVIDER_IDP_NAME`` or set the provider id that is used to
+    compare with the other service providers ``KEYSTONE_PROVIDER_IDP_ID``.
+
+    [`blueprint k2k-horizon
+    <https://blueprints.launchpad.net/horizon/+spec/k2k-horizon>`_].