diff --git a/planetstack/observer/steps/garbage_collector.py b/planetstack/observer/steps/garbage_collector.py
index 5d434a0..a45db8c 100644
--- a/planetstack/observer/steps/garbage_collector.py
+++ b/planetstack/observer/steps/garbage_collector.py
@@ -16,7 +16,7 @@
 
     def call(self, **args):
         try:
-            #self.sync_roles()
+            #self.gc_roles()
             self.gc_tenants()
             self.gc_users()
             self.gc_user_tenant_roles()
@@ -208,3 +208,23 @@
 
     def gc_external_routes(self):
         pass
+
+    def gc_nodes(self):
+         # collect local nodes
+        nodes = Node.objects.all()
+        nodes_dict = {}
+        for node in nodes:
+            nodes_dict[node.name] = node
+
+        # collect nova nodes:
+        compute_nodes = self.client.nova.hypervisors.list()
+        compute_nodes_dict = {}
+        for compute_node in compute_nodes:
+            compute_nodes_dict[compute_node.hypervisor_hostname] = compute_node
+
+        # remove old nodes
+        old_node_names = set(nodes_dict.keys()).difference(compute_nodes_dict.keys())
+        Node.objects.filter(name__in=old_node_names).delete()
+
+    def gc_images(self):
+        pass