Add `bifrost-cli enroll` command

Change-Id: I14979136e8c3befaabce9c6b169b5d6659f42812

bifrost/cli.py

@@ -171,6 +171,21 @@ def cmd_install(args):
         "See documentation for next steps")
 
 
+def cmd_enroll(args):
+    inventory = os.path.join(PLAYBOOKS, 'inventory', 'bifrost_inventory.py')
+    if os.path.exists(args.inventory):
+        nodes_inventory = os.path.abspath(args.inventory)
+        os.environ['BIFROST_INVENTORY_SOURCE'] = nodes_inventory
+    else:
+        sys.exit('Inventory file %s cannot be found' % args.inventory)
+
+    ansible('enroll-dynamic.yaml',
+            inventory=inventory,
+            verbose=args.debug,
+            inspect_nodes=args.inspect,
+            extra_vars=args.extra_vars)
+
+
 def parse_args():
     parser = argparse.ArgumentParser("Bifrost CLI")
     parser.add_argument('--debug', action='store_true',
@@ -243,6 +258,16 @@ def parse_args():
     install.add_argument('-e', '--extra-vars', action='append',
                          help='additional vars to pass to ansible')
 
+    enroll = subparsers.add_parser(
+        'enroll', help='Enroll bare metal nodes')
+    enroll.set_defaults(func=cmd_enroll)
+    enroll.add_argument('inventory', default='baremetal-inventory.json',
+                        help='file with the inventory')
+    enroll.add_argument('--inspect', action='store_true',
+                        help='inspect nodes while enrolling')
+    enroll.add_argument('-e', '--extra-vars', action='append',
+                        help='additional vars to pass to ansible')
+
     args = parser.parse_args()
     if getattr(args, 'func', None) is None:
         parser.print_usage(file=sys.stderr)

doc/source/user/howto.rst

@@ -123,6 +123,10 @@ injection can be found in the ``playbooks/inventory/`` folder.
 How this works?
 ---------------
 
+Starting with the Wallaby cycle, you can use ``bifrost-cli`` for enrolling::
+
+    ./bifrost-cli enroll /tmp/baremetal.json
+
 Utilizing the dynamic inventory module, enrollment is as simple as setting
 the ``BIFROST_INVENTORY_SOURCE`` environment variable to your inventory data
 source, and then executing the enrollment playbook.::

releasenotes/notes/bifrost-cli-enroll-dd5a22f17c6666d5.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    Adds a new command ``bifrost-cli enroll`` to simplify enrolling nodes.