diff --git a/dac-ansible/README.md b/dac-ansible/README.md
index 1802deba..0bcc6986 100644
--- a/dac-ansible/README.md
+++ b/dac-ansible/README.md
@@ -2,15 +2,26 @@
 
 Install data-acc demo with ansible. It creates a bunch of OpenStack VMs, then uses ansible to install a development data-acc enviroment.
 
-To run this set of playbooks, first we create some VMs in OpenStack.
+## Setup
+
+Install Ansible and the OpenStack SDK, eg in a Python virtual environment:
+
+    virtualenv .venv
+    . .venv/bin/activate
+    pip install -U pip
+    pip install -U ansible openstacksdk
+
+Pull in Ansible role dependencies:
+
+    ansible-galaxy install -r requirements.yml
 
 Source your OpenStack RC, eg:
 
     . openrc
 
-Edit create-servers.py to set your NETWORK_NAME and KEYPAIR_NAME and then run:
+Create OpenStack VMs:
 
-    ./create-servers.py > hosts
+    ./create-servers.py -k KEYPAIR_NAME -n NETWORK_NAME > hosts
     
 Once the VMs are created, you can now use ansible to deploy the dev environment:
 
@@ -33,16 +44,6 @@ Once the ansible has finished, you can login and try a slurm test:
     squeue
     scontrol show burstbuffer
 
-## Install notes
-
-You may find this useful to run the above ansible-playbook command:
-
-    virtualenv .venv
-    . .venv/bin/activate
-    pip install -U pip
-    pip install -U ansible openstacksdk
-    ansible-galaxy install -r requirements.yml
-
 ## Debugging Guide
 
 When trying slurm-test.sh or similar, here are some debugging tips.
diff --git a/dac-ansible/create-servers.py b/dac-ansible/create-servers.py
index 40d46840..83e8601d 100755
--- a/dac-ansible/create-servers.py
+++ b/dac-ansible/create-servers.py
@@ -1,13 +1,19 @@
 #!/usr/bin/env python
 
 import openstack
+from optparse import OptionParser
 
+parser = OptionParser()
+parser.add_option("-k", "--key", dest="key",
+                  help="SSH key pair name", metavar="KEYPAIR_NAME")
+parser.add_option("-n", "--network", dest="network",
+                  help="Network name", metavar="NETWORK_NAME")
+(options, args) = parser.parse_args()
 
 IMAGE_NAME = "CentOS-7-x86_64-GenericCloud"
 FLAVOR_NAME = "C1.vss.tiny"
-NETWORK_NAME = "WCDC-Data43"
-KEYPAIR_NAME = "usual"
-
+NETWORK_NAME = options.network
+KEYPAIR_NAME = options.key
 
 def get_connection():
     # openstack.enable_logging(debug=True)