Add ceph-ansible support to tripleo-ansible-inventory

The tripleo-ansible-inventory command produces an inventory
which works with TripleO but not with ceph-ansible. TripleO
ceph-ansible integration then creates its own inventory for
the ceph-ansible playbook run. This patch makes generating
a separate inventory for ceph-ansible no longer necessary.

TripleO services already map to the same inventory groups
used by ceph-ansible, e.g. ceph_clients:clients, ceph_mons:
mons, ceph_osds:osds, etc. This patch maps the names of the
TripleO inventory Ceph groups to the names of the inventory
groups used by ceph-ansible and creates a duplicate group
entry in the inventory, but with the names that ceph-ansible
expects.

Change-Id: Ie9880d7b6702b3c5f0e407e4ffe6f297912a1d10

tripleo_common/inventory.py

@@ -287,6 +287,27 @@ class TripleoInventory(object):
         # Associate services with roles
         roles_by_service = self.get_roles_by_service(
             self.stack_outputs.get('EnabledServices', {}))
+
+        # tripleo-groups map to ceph-ansible groups as follows
+        ceph_group_map = {
+            'ceph_mon': 'mons',
+            'ceph_osd': 'osds',
+            'ceph_mgr': 'mgrs',
+            'ceph_rgw': 'rgws',
+            'ceph_mds': 'mdss',
+            'ceph_nfs': 'nfss',
+            'ceph_client': 'clients',
+            'ceph_rbdmirror': 'rbdmirrors'
+        }
+        # add a ceph-ansible compatible group to the inventory
+        # which has the same roles. E.g. if the inventory has
+        # a group 'ceph_mon' which has childen and vars, then
+        # the inventory will now also have a group 'mons' with
+        # the same children and vars.
+        for service, roles in roles_by_service.copy().items():
+            if service in ceph_group_map.keys():
+                roles_by_service[ceph_group_map[service]] = roles
+
         for service, roles in roles_by_service.items():
             service_children = [role for role in roles
                                 if ret.get(role) is not None]

tripleo_common/tests/test_inventory.py

@@ -39,7 +39,8 @@ MOCK_ENABLED_SERVICES = {
     "Compute": [
         "nova_compute",
         "kernel",
-        "tripleo_packages"
+        "tripleo_packages",
+        "ceph_client"
     ],
     "CephStorage": [
         "kernel",
@@ -60,7 +61,7 @@ class TestInventory(base.TestCase):
             {'output_key': 'EnabledServices',
              'output_value': {
                  'Controller': ['sa', 'sb'],
-                 'Compute': ['sd', 'se'],
+                 'Compute': ['sd', 'se', 'ceph_client'],
                  'CustomRole': ['sg', 'sh']}},
             {'output_key': 'KeystoneURL',
              'output_value': 'xyz://keystone'},
@@ -138,6 +139,7 @@ class TestInventory(base.TestCase):
             'keystone': ['Controller'],
             'nova_compute': ['Compute'],
             'cinder_volume': ['BlockStorage'],
+            'ceph_client': ['Compute'],
         }
         self.assertDictEqual(services, expected)
 
@@ -389,6 +391,10 @@ class TestInventory(base.TestCase):
                    'vars': {'ansible_ssh_user': 'heat-admin'}},
             'se': {'children': {'Compute': {}},
                    'vars': {'ansible_ssh_user': 'heat-admin'}},
+            'ceph_client': {'children': {'Compute': {}},
+                            'vars': {'ansible_ssh_user': 'heat-admin'}},
+            'clients': {'children': {'Compute': {}},
+                        'vars': {'ansible_ssh_user': 'heat-admin'}},
             'sg': {'children': {'CustomRole': {}},
                    'vars': {'ansible_ssh_user': 'heat-admin'}},
             'sh': {'children': {'CustomRole': {}},