From 2ea3a51ff4d482338a9731158234df2a844d2109 Mon Sep 17 00:00:00 2001
From: Lukasz Polanski <wookasz@gmail.com>
Date: Thu, 16 Nov 2023 16:20:15 +0200
Subject: [PATCH] Closes #13808: render-config API endpoint for virtual
 machines

---
 netbox/virtualization/api/views.py | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/netbox/virtualization/api/views.py b/netbox/virtualization/api/views.py
index 5b9cf411733..cc64b1f6fe0 100644
--- a/netbox/virtualization/api/views.py
+++ b/netbox/virtualization/api/views.py
@@ -1,8 +1,12 @@
+from rest_framework.decorators import action
+from rest_framework.renderers import JSONRenderer
+from rest_framework.response import Response
 from rest_framework.routers import APIRootView
 
 from dcim.models import Device
-from extras.api.mixins import ConfigContextQuerySetMixin
+from extras.api.mixins import ConfigContextQuerySetMixin, ConfigTemplateRenderMixin
 from netbox.api.viewsets import NetBoxModelViewSet
+from netbox.api.renderers import TextRenderer
 from utilities.utils import count_related
 from virtualization import filtersets
 from virtualization.models import Cluster, ClusterGroup, ClusterType, VirtualMachine, VMInterface
@@ -52,7 +56,7 @@ class ClusterViewSet(NetBoxModelViewSet):
 # Virtual machines
 #
 
-class VirtualMachineViewSet(ConfigContextQuerySetMixin, NetBoxModelViewSet):
+class VirtualMachineViewSet(ConfigContextQuerySetMixin, NetBoxModelViewSet, ConfigTemplateRenderMixin):
     queryset = VirtualMachine.objects.prefetch_related(
         'site', 'cluster', 'device', 'role', 'tenant', 'platform', 'primary_ip4', 'primary_ip6', 'tags'
     )
@@ -78,6 +82,23 @@ def get_serializer_class(self):
 
         return serializers.VirtualMachineWithConfigContextSerializer
 
+    @action(detail=True, methods=['post'], url_path='render-config', renderer_classes=[JSONRenderer, TextRenderer])
+    def render_config(self, request, pk):
+        """
+        Resolve and render the preferred ConfigTemplate for this virtual machine.
+        """
+        vm = self.get_object()
+        configtemplate = vm.get_config_template()
+        if not configtemplate:
+            return Response({'error': 'No config template found for this virtualmachine.'}, status=HTTP_400_BAD_REQUEST)
+
+        # Compile context data
+        context_data = vm.get_config_context()
+        context_data.update(request.data)
+        context_data.update({'virtualmachine': vm})
+
+        return self.render_configtemplate(request, configtemplate, context_data)
+
 
 class VMInterfaceViewSet(NetBoxModelViewSet):
     queryset = VMInterface.objects.prefetch_related(