add new deleters, update existing deleters
diff --git a/planetstack/observer/deleters/network_deployment_deleter.py b/planetstack/observer/deleters/network_deployment_deleter.py
new file mode 100644
index 0000000..72b10b2
--- /dev/null
+++ b/planetstack/observer/deleters/network_deployment_deleter.py
@@ -0,0 +1,21 @@
+from core.models import Network, NetworkDeployments
+from observer.deleter import Deleter
+from openstack.driver import OpenStackDriver
+
+class NetworkDeploymentDeleter(Deleter):
+    model='NetworkDeployment'
+
+    def call(self, pk):
+        network_deployment = NetworkDeployments.objects.get(pk=pk)
+        driver = OpenStackDriver().client_driver(caller=network_deployment.network.owner.creator,
+                                                 tenant=network_deployment.network.owner.name,
+                                                 deployment=network_deployment.deployment.name)
+        if (network_deployment.router_id) and (network_deployment.subnet_id):
+            driver.delete_router_interface(network_deployment.router_id, network_deployment.subnet_id)
+        if network_deployment.subnet_id:
+            driver.delete_subnet(network_deployment.subnet_id)
+        if network_deployment.router_id:
+            driver.delete_router(network_deployment.router_id)
+        if network_deployment.net_id:
+            driver.delete_network(network_deployment.net_id)
+        network_deployment.delete()