Consistent external Ceph configuration for Glance

Made glance follow the <service>_backend_ceph configuration pattern.

Change-Id: I7bc2b3b35d96bd297d520750dccd7333fa68d941
Closes-Bug: #1605962

ansible/group_vars/all.yml

@@ -223,8 +223,6 @@ nova_keystone_user: "nova"
 enable_nova_fake: "no"
 num_nova_fake_per_node: 5
 
-# Control usage of ceph per service
-glance_enable_ceph: "{{ enable_ceph }}"
 
 ####################
 # RabbitMQ options
@@ -247,6 +245,13 @@ kolla_external_fqdn_cert: "{{ node_config_directory }}/certificates/haproxy.pem"
 kibana_user: "kibana"
 
 
+#######################
+# Glance options
+#######################
+glance_backend_file: "{{ not enable_ceph | bool }}"
+glance_backend_ceph: "{{ enable_ceph }}"
+
+
 #################################
 # Cinder options
 #################################

ansible/roles/glance/tasks/deploy.yml

@@ -1,14 +1,14 @@
 ---
 - include: ceph.yml
   when:
-    - (enable_ceph | bool) and (glance_enable_ceph | bool)
+    - (enable_ceph | bool) and (glance_backend_ceph | bool)
     - inventory_hostname in groups['ceph-mon'] or
       inventory_hostname in groups['glance-api'] or
       inventory_hostname in groups['glance-registry']
 
 - include: external_ceph.yml
   when:
-    - (enable_ceph | bool == False) and (glance_enable_ceph | bool)
+    - (enable_ceph | bool == False) and (glance_backend_ceph | bool)
     - inventory_hostname in groups['glance-api'] or
       inventory_hostname in groups['glance-registry']
 

ansible/roles/glance/templates/glance-api.conf.j2

@@ -40,7 +40,7 @@ memcached_servers = {% for host in groups['memcached'] %}{{ hostvars[host]['ansi
 flavor = keystone
 
 [glance_store]
-{% if enable_ceph | bool and glance_enable_ceph | bool %}
+{% if enable_ceph | bool and glance_backend_ceph | bool %}
 default_store = rbd
 stores = rbd
 rbd_store_user = glance

ansible/roles/glance/templates/glance-api.json.j2

@@ -6,7 +6,7 @@
             "dest": "/etc/glance/glance-api.conf",
             "owner": "glance",
             "perm": "0600"
-        }{% if glance_enable_ceph | bool %},
+        }{% if glance_backend_ceph | bool %},
         {
             "source": "{{ container_config_directory }}/ceph.*",
             "dest": "/etc/ceph/",

doc/external-ceph-guide.rst

@@ -33,10 +33,10 @@ service in ``/etc/kolla/global.yml``:
 
 ::
 
-  glance_enable_ceph: "yes"
+  glance_backend_ceph: "yes"
   cinder_backend_ceph: "yes"
 
-The combination of ``enable_ceph: "no"`` and ``<service>_enable_ceph: "yes"``
+The combination of ``enable_ceph: "no"`` and ``<service>_backend_ceph: "yes"``
 triggers the activation of external ceph mechanism in Kolla.
 
 Configuring External Ceph

etc/kolla/globals.yml

@@ -126,10 +126,6 @@ neutron_external_interface: "eth1"
 #enable_swift: "no"
 #enable_tempest: "no"
 
-# Control usage of ceph per service. This allows to configure external ceph
-# when ceph is not deployed by Kolla.
-#glance_enable_ceph: "{{ enable_ceph }}"
-
 
 ###################
 # Ceph options
@@ -144,6 +140,13 @@ neutron_external_interface: "eth1"
 # Valid options are [ erasure, replicated ]
 #ceph_pool_type: "replicated"
 
+#######################
+# Glance options
+#######################
+# Configure image backend. 
+glance_backend_file: "yes"
+#glance_backend_ceph: "no"
+
 
 #######################
 # Cinder options