diff --git a/start_vms.py b/start_vms.py
index 81f3e81..f7cb09f 100644
--- a/start_vms.py
+++ b/start_vms.py
@@ -10,6 +10,7 @@
 
 from nodes.node import Node
 from nodes.openstack import get_floating_ip
+from utils import parse_creds
 
 logger = logging.getLogger("io-perf-tool")
 
@@ -20,11 +21,13 @@
     passwd = env('OS_PASSWORD')
     tenant = env('OS_TENANT_NAME')
     auth_url = env('OS_AUTH_URL')
+
     return name, passwd, tenant, auth_url
 
 
 def nova_connect():
-    return n_client('1.1', *ostack_get_creds())
+    return n_client('1.1', *ostack_get_creds()
+                    )
 
 
 def create_keypair(nova, name, key_path):
@@ -84,9 +87,9 @@
 
 
 def launch_vms(config):
-    creds = config['creds']
-    if creds != 'ENV':
-        raise ValueError("Only 'ENV' creds are supported")
+    creds = config['vm_params']['creds']
+    # if creds != 'ENV':
+    #     raise ValueError("Only 'ENV' creds are supported")
 
     logger.debug("Starting new nodes on openstack")
     conn = nova_connect()
@@ -197,6 +200,11 @@
     return flt_ip.ip, nova.servers.get(srv.id)
 
 
+def clear_nodes():
+    nova = nova_connect()
+    clear_all(nova)
+
+
 def clear_all(nova, name_templ="ceph-test-{0}"):
     deleted_srvs = set()
     for srv in nova.servers.list():