diff --git a/roldefs.py b/roldefs.py
new file mode 100644
index 0000000..58f04e1
--- /dev/null
+++ b/roldefs.py
@@ -0,0 +1,8 @@
+from fabric.api import env, run
+env.roledefs = {
+    'web': ['web1', 'web2', 'web3'],
+    'db': ['db1', 'db2']
+}
+
+def hello():
+    run('hostname')