Add a config option to disable Router panel

Neutron setup allows operators not to enable Router feautre
(by not using Router service plugin in neutron.conf) and
some Neutron plugin does not support Router feature.
According to bug 1350639 there is also a case where operators
want to disable Router panel from their policy.
It seems nice we have a option to control Router panel.

This commit add a new option 'enable_router' to OPENSTACK_NEUTRON_NETWORK.
The default is True since router feature is enabled in most deployments
and it is the current default behavior of Horizon.
If this option is False, Router panel will disappear.

blueprint hide-router-panel-by-config
Partial-Bug: #1292022
Closes-Bug: #1350639
Change-Id: If90517bd35c5b18173c54c14a1ba229f97ba4797

doc/source/topics/settings.rst

@@ -493,6 +493,7 @@ by cinder.  Currently only the backup service is available.
 Default::
 
         {
+            'enable_router': True,
             'enable_distributed_router': False,
             'enable_lb': False,
             'enable_quotas': False,
@@ -507,6 +508,16 @@ A dictionary of settings which can be used to enable optional services provided
 by Neutron and configure Neutron specific features.  The following options are
 available.
 
+``enable_router``:
+
+.. versionadded:: 2014.2(Juno)
+
+Default: ``True``
+
+Enable (True) or disable (False) the router panel. If your neutron
+has no support for Layer-3 router features, or you do no not wish to
+provide the Layer-3 features through the Dashboard, this should be set to
+``False``.
 
 ``enable_distributed_router``:
 

openstack_dashboard/dashboards/admin/routers/panel.py

@@ -12,6 +12,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from django.conf import settings
 from django.utils.translation import ugettext_lazy as _
 
 import horizon
@@ -24,4 +25,6 @@ class Routers(horizon.Panel):
     slug = 'routers'
     permissions = ('openstack.services.network',)
 
-dashboard.Admin.register(Routers)
+network_config = getattr(settings, 'OPENSTACK_NEUTRON_NETWORK', {})
+if network_config.get('enable_router', True):
+    dashboard.Admin.register(Routers)

openstack_dashboard/dashboards/project/network_topology/tests.py

@@ -16,6 +16,7 @@ import json
 
 from django.core.urlresolvers import reverse
 from django import http
+import django.test
 
 from mox import IsA  # noqa
 
@@ -34,6 +35,17 @@ class NetworkTopologyTests(test.TestCase):
                                       'router_list',
                                       'port_list')})
     def test_json_view(self):
+        self._test_json_view()
+
+    @django.test.utils.override_settings(
+        OPENSTACK_NEUTRON_NETWORK={'enable_router': False})
+    @test.create_stubs({api.nova: ('server_list',),
+                        api.neutron: ('network_list_for_tenant',
+                                      'port_list')})
+    def test_json_view_router_disabled(self):
+        self._test_json_view(router_enable=False)
+
+    def _test_json_view(self, router_enable=True):
         api.nova.server_list(
             IsA(http.HttpRequest)).AndReturn([self.servers.list(), False])
         tenant_networks = [net for net in self.networks.list()
@@ -43,6 +55,7 @@ class NetworkTopologyTests(test.TestCase):
         api.neutron.network_list_for_tenant(
             IsA(http.HttpRequest),
             self.tenant.id).AndReturn(tenant_networks)
+        if router_enable:
             api.neutron.network_list(
                 IsA(http.HttpRequest),
                 **{'router:external': True}).AndReturn(external_networks)
@@ -51,6 +64,7 @@ class NetworkTopologyTests(test.TestCase):
         # router2 : no gateway port
         # router3 : gateway port included in port list
         routers = self.routers.list() + self.routers_with_rules.list()
+        if router_enable:
             api.neutron.router_list(
                 IsA(http.HttpRequest),
                 tenant_id=self.tenant.id).AndReturn(routers)
@@ -79,6 +93,7 @@ class NetworkTopologyTests(test.TestCase):
         # rotuers
         # result_router_urls = [(router['id'], router['url'])
         #                       for router in data['routers']]
+        if router_enable:
             expect_router_urls = [
                 {'id': router.id,
                  'external_gateway_info':
@@ -88,9 +103,13 @@ class NetworkTopologyTests(test.TestCase):
                  'url': '/project/routers/%s/' % router.id}
                 for router in routers]
             self.assertEqual(expect_router_urls, data['routers'])
+        else:
+            self.assertFalse(data['routers'])
 
         # networks
-        expect_net_urls = [{'id': net.id,
+        expect_net_urls = []
+        if router_enable:
+            expect_net_urls += [{'id': net.id,
                                  'url': None,
                                  'name': net.name,
                                  'router:external': net.router__external,
@@ -119,6 +138,7 @@ class NetworkTopologyTests(test.TestCase):
              'status': port.status,
              'url': '/project/networks/ports/%s/detail' % port.id}
             for port in self.ports.list()]
+        if router_enable:
             # fake port for router1 gateway (router1 on ext_net)
             router1 = routers[0]
             ext_net = external_networks[0]

openstack_dashboard/dashboards/project/network_topology/views.py

@@ -103,17 +103,25 @@ class NetworkTopologyView(TemplateView):
 
     def get_context_data(self, **kwargs):
         context = super(NetworkTopologyView, self).get_context_data(**kwargs)
+        network_config = getattr(settings, 'OPENSTACK_NEUTRON_NETWORK', {})
 
         context['launch_instance_allowed'] = self._has_permission(
             (("compute", "compute:create"),))
         context['create_network_allowed'] = self._has_permission(
             (("network", "create_network"),))
-        context['create_router_allowed'] = self._has_permission(
+        context['create_router_allowed'] = (
-            (("network", "create_router"),))
+            network_config.get('enable_router', True) and
+            self._has_permission((("network", "create_router"),)))
         return context
 
 
 class JSONView(View):
+
+    @property
+    def is_router_enabled(self):
+        network_config = getattr(settings, 'OPENSTACK_NEUTRON_NETWORK', {})
+        return network_config.get('enable_router', True)
+
     def add_resource_url(self, view, resources):
         tenant_id = self.request.user.tenant_id
         for resource in resources:
@@ -170,6 +178,7 @@ class JSONView(View):
                               networks)
 
         # Add public networks to the networks list
+        if self.is_router_enabled:
             try:
                 neutron_public_networks = api.neutron.network_list(
                     request,
@@ -196,6 +205,8 @@ class JSONView(View):
                       reverse=True)
 
     def _get_routers(self, request):
+        if not self.is_router_enabled:
+            return []
         try:
             neutron_routers = api.neutron.router_list(
                 request,

openstack_dashboard/dashboards/project/routers/panel.py

@@ -12,6 +12,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from django.conf import settings
 from django.utils.translation import ugettext_lazy as _
 
 import horizon
@@ -24,4 +25,6 @@ class Routers(horizon.Panel):
     slug = 'routers'
     permissions = ('openstack.services.network',)
 
-dashboard.Project.register(Routers)
+network_config = getattr(settings, 'OPENSTACK_NEUTRON_NETWORK', {})
+if network_config.get('enable_router', True):
+    dashboard.Project.register(Routers)

openstack_dashboard/local/local_settings.py.example

@@ -178,6 +178,7 @@ OPENSTACK_CINDER_FEATURES = {
 # services provided by neutron. Options currently available are load
 # balancer service, security groups, quotas, VPN service.
 OPENSTACK_NEUTRON_NETWORK = {
+    'enable_router': True,
     'enable_lb': False,
     'enable_firewall': False,
     'enable_quotas': True,

openstack_dashboard/test/settings.py

@@ -104,6 +104,7 @@ OPENSTACK_CINDER_FEATURES = {
 }
 
 OPENSTACK_NEUTRON_NETWORK = {
+    'enable_router': True,
     'enable_lb': True,
     'enable_firewall': True,
     'enable_quotas': False,  # Enabled in specific tests only