diff --git a/workflows/tt-workflow/templates/_tosca.tpl b/workflows/tt-workflow/templates/_tosca.tpl
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+++ b/workflows/tt-workflow/templates/_tosca.tpl
@@ -0,0 +1,59 @@
+{{/* vim: set filetype=mustache: */}}
+{{/*
+Copyright 2018-present Open Networking Foundation
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/}}
+
+{{- define "tt-workflow.serviceGraphTosca" -}}
+tosca_definitions_version: tosca_simple_yaml_1_0
+imports:
+  - custom_types/ttworkflowdriverservice.yaml
+  - custom_types/voltservice.yaml
+  - custom_types/servicedependency.yaml
+  - custom_types/servicegraphconstraint.yaml
+description: tt-workflow-driver service graph
+topology_template:
+  node_templates:
+
+# These services must be defined before loading the graph
+
+    service#volt:
+      type: tosca.nodes.VOLTService
+      properties:
+        name: volt
+        must-exist: true
+
+    service#tt-workflow-driver:
+      type: tosca.nodes.TtWorkflowDriverService
+      properties:
+        name: tt-workflow-driver
+        must-exist: true
+
+    service_dependency#workflow_volt:
+      type: tosca.nodes.ServiceDependency
+      properties:
+        connect_method: none
+      requirements:
+        - subscriber_service:
+            node: service#tt-workflow-driver
+            relationship: tosca.relationships.BelongsToOne
+        - provider_service:
+            node: service#volt
+            relationship: tosca.relationships.BelongsToOne
+
+    constraints:
+      type: tosca.nodes.ServiceGraphConstraint
+      properties:
+        constraints: '[[null, "rcord", null], [null, "volt", null], ["onos", "fabric-crossconnect", "tt-workflow-driver"], ["fabric", null, null]]'
+{{- end -}}