Graph for templates about number of running instances

closes #420

circle/dashboard/templates/dashboard/template-edit.html

@@ -166,6 +166,20 @@
         </ul>
       </div>
     </div>
+
+    {% if show_graph %}
+      <div class="panel panel-default">
+        <div class="panel-heading">
+          <div class="pull-right graph-buttons">
+            {% include "dashboard/_graph-time-buttons.html" %}
+          </div>
+          <h3 class="no-margin"><i class="fa fa-area-chart"></i> {% trans "Graphs" %}</h3>
+        </div>
+        <div class="text-center graph-images">
+          <img src="{% url "dashboard.views.template-graph" object.pk "instances" graph_time %}"/>
+        </div>
+      </div>
+    {% endif %}
   </div><!-- .col-md-4 -->
 </div><!-- .row -->
 

circle/dashboard/urls.py

@@ -47,7 +47,7 @@ from .views import (
     LeaseAclUpdateView,
     toggle_template_tutorial,
     ClientCheck, TokenLogin,
-    VmGraphView, NodeGraphView, NodeListGraphView,
+    VmGraphView, NodeGraphView, NodeListGraphView, TemplateGraphView,
     TransferInstanceOwnershipView, TransferInstanceOwnershipConfirmView,
     TransferTemplateOwnershipView, TransferTemplateOwnershipConfirmView,
     OpenSearchDescriptionView,
@@ -152,6 +152,10 @@ urlpatterns = patterns(
          r'(?P<time>[0-9]{1,2}[hdwy])$'),
         NodeListGraphView.as_view(),
         name='dashboard.views.node-list-graph'),
+    url((r'^template/(?P<pk>\d+)/graph/(?P<metric>[a-z]+)/'
+         r'(?P<time>[0-9]{1,2}[hdwy])$'),
+        TemplateGraphView.as_view(),
+        name='dashboard.views.template-graph'),
     url(r'^group/(?P<pk>\d+)/$', GroupDetailView.as_view(),
         name='dashboard.views.group-detail'),
     url(r'^group/(?P<pk>\d+)/update/$', GroupProfileUpdate.as_view(),

circle/dashboard/views/graph.py

@@ -28,7 +28,7 @@ from django.views.generic import View
 
 from braces.views import LoginRequiredMixin
 
-from vm.models import Instance, Node
+from vm.models import Instance, Node, InstanceTemplate
 
 
 logger = logging.getLogger(__name__)
@@ -152,6 +152,28 @@ class NodeGraphView(GraphViewBase):
         return self.model.objects.get(id=pk)
 
 
+class TemplateGraphView(GraphViewBase):
+    model = InstanceTemplate
+    base = Metric
+
+    def get_object(self, request, pk):
+        instance = super(TemplateGraphView, self).get_object(request, pk)
+        if not instance.has_level(request.user, 'operator'):
+            raise PermissionDenied()
+        return instance
+
+
+class TemplateVms(object):
+    metric_name = "instances.running"
+    title = _("Instance count")
+    label = _("instance count")
+
+    def get_minmax(self):
+        return (0, None)
+
+register_graph(TemplateVms, 'instances', TemplateGraphView)
+
+
 class NodeListGraphView(GraphViewBase):
     model = Node
     base = Metric

circle/dashboard/views/template.py

@@ -47,7 +47,8 @@ from ..tables import TemplateListTable, LeaseListTable
 from .util import (
     AclUpdateView, FilterMixin,
     TransferOwnershipConfirmView, TransferOwnershipView,
-    DeleteViewBase
+    DeleteViewBase,
+    GraphMixin
 )
 
 logger = logging.getLogger(__name__)
@@ -258,7 +259,8 @@ class TemplateDelete(DeleteViewBase):
         object.delete()
 
 
-class TemplateDetail(LoginRequiredMixin, SuccessMessageMixin, UpdateView):
+class TemplateDetail(LoginRequiredMixin, GraphMixin,
+                     SuccessMessageMixin, UpdateView):
     model = InstanceTemplate
     template_name = "dashboard/template-edit.html"
     form_class = TemplateForm
@@ -300,6 +302,7 @@ class TemplateDetail(LoginRequiredMixin, SuccessMessageMixin, UpdateView):
         context['is_owner'] = obj.has_level(self.request.user, 'owner')
         context['aclform'] = AclUserOrGroupAddForm()
         context['parent'] = obj.parent
+        context['show_graph'] = obj.has_level(self.request.user, 'operator')
         return context
 
     def get_success_url(self):

circle/vm/models/instance.py

@@ -200,6 +200,10 @@ class InstanceTemplate(AclBase, VirtualMachineDescModel, TimeStampedModel):
     def get_running_instances(self):
         return Instance.active.filter(template=self, status="RUNNING")
 
+    @property
+    def metric_prefix(self):
+        return 'template.%d' % self.pk
+
 
 class Instance(AclBase, VirtualMachineDescModel, StatusModel, OperatedMixin,
                TimeStampedModel):