Process requests for radosgw per unit keys

Process requests for radosgw per unit keys. Ideally the charm
would move to using charms.ceph.utils for the get_radosgw_key
method but this does not work atm. I have raised bug #1899643
to cover deduplicating hooks.ceph v charms.ceph.*

Change-Id: I00f5a58f127baa1f7878b0ddb31b4fa009d9651e
Closes-Bug: #1899634

hooks/ceph.py

@@ -347,8 +347,8 @@ _upgrade_caps = {
 }
 
 
-def get_radosgw_key():
-    return get_named_key('radosgw.gateway', _radosgw_caps)
+def get_radosgw_key(name='radosgw.gateway'):
+    return get_named_key(name, _radosgw_caps)
 
 
 _default_caps = collections.OrderedDict([

hooks/ceph_hooks.py

@@ -176,10 +176,18 @@ def radosgw_relation(relid=None, unit=None):
         ceph_addrs = config('monitor-hosts')
         data = {
             'fsid': config('fsid'),
-            'radosgw_key': ceph.get_radosgw_key(),
             'auth': config('auth-supported'),
             'ceph-public-address': ceph_addrs,
         }
+        key_name = relation_get('key_name', unit=unit, rid=relid)
+        if key_name:
+            # New style, per unit keys
+            data['{}_key'.format(key_name)] = (
+                ceph.get_radosgw_key(name=key_name)
+            )
+        else:
+            # Old style global radosgw key
+            data['radosgw_key'] = ceph.get_radosgw_key()
 
         settings = relation_get(rid=relid, unit=unit) or {}
         """Process broker request(s)."""

tests/tests.yaml

@@ -54,6 +54,12 @@ target_deploy_status:
   nova-compute:
     workload-status: waiting
     workload-status-message: "Incomplete relations: storage-backend"
+  cinder-ceph:
+    workload-status: waiting
+    workload-status-message: "Ceph broker request incomplete"
+  glance:
+    workload-status: waiting
+    workload-status-message: "Incomplete relations: storage-backend"
 
 tests_options:
   force_deploy: