client: don't make `osd_pool_default_pg_num` mandatory

making `osd_pool_default_pg_num` mandatory is a bit agressive and is
unrelated when you just want to create users keyrings.

Closes: #2241

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>

group_vars/clients.yml.sample

@@ -25,6 +25,7 @@ dummy:
 # Generate a keyring using ceph-authtool CLI or python.
 # Eg:
 #  $ ceph-authtool --gen-print-key
+#  or
 #  $ python2 -c "import os ; import struct ; import time; import base64 ; key = os.urandom(16) ; header = struct.pack('<hiih',1,int(time.time()),0,len(key)) ; print base64.b64encode(header + key)"
 #keys:
 #  - { name: client.test, key: "ADD-KEYRING-HERE==", mon_cap: "allow r", osd_cap: "allow class-read object_prefix rbd_children, allow rwx pool=test", mode: "0600", acls: [] }

roles/ceph-client/defaults/main.yml

@@ -17,6 +17,7 @@ pools:
 # Generate a keyring using ceph-authtool CLI or python.
 # Eg:
 #  $ ceph-authtool --gen-print-key
+#  or
 #  $ python2 -c "import os ; import struct ; import time; import base64 ; key = os.urandom(16) ; header = struct.pack('<hiih',1,int(time.time()),0,len(key)) ; print base64.b64encode(header + key)"
 keys:
   - { name: client.test, key: "ADD-KEYRING-HERE==", mon_cap: "allow r", osd_cap: "allow class-read object_prefix rbd_children, allow rwx pool=test", mode: "0600", acls: [] }

roles/ceph-client/tasks/create_users_keys.yml

@@ -51,6 +51,7 @@
   changed_when: false
   failed_when: false
   when:
+    - ceph_conf_overrides.get('global', {}).get('osd_pool_default_pg_num', False) != False
     - pools | length > 0
     - copy_admin_key
 

roles/ceph-client/tasks/main.yml

@@ -6,4 +6,3 @@
   include: create_users_keys.yml
   when:
     - user_config
-    - ceph_conf_overrides.get('global', {}).get('osd_pool_default_pg_num', False) != False