Move ceph client role to playbooks for faster run time

The change will limit the hosts the ceph client role is executed against
by checking the ceph conditionals before simply executing the role.
This will help general run times especially on large scale clouds.

Change-Id: Ic7130368c5a2bb231c35bb459a2bebaa28a5a968
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>

playbooks/os-cinder-install.yml

@@ -103,6 +103,9 @@
     - role: "ceph_client"
       openstack_service_system_user: "{{ cinder_system_user_name }}"
       openstack_service_venv_bin: "{{ cinder_bin }}"
+      when:
+        - inventory_hostname in groups['cinder_volume']
+        - cinder_backend_rbd_inuse | default(false) | bool
       tags:
         - ceph
     - role: "rsyslog_client"

playbooks/os-glance-install.yml

@@ -70,14 +70,17 @@
     - include: common-tasks/package-cache-proxy.yml
   roles:
     - role: "os_glance"
-    - role: "openstack_openrc"
-      tags:
-        - openrc
     - role: "ceph_client"
       openstack_service_system_user: "{{ glance_system_user_name }}"
       openstack_service_venv_bin: "{{ glance_bin }}"
+      when:
+        - inventory_hostname in groups['glance_api']
+        - (glance_default_store | default('none') | lower == 'rbd')
       tags:
         - ceph
+    - role: "openstack_openrc"
+      tags:
+        - openrc
     - role: "rsyslog_client"
       rsyslog_client_log_rotate_file: glance_log_rotate
       rsyslog_client_log_dir: "/var/log/glance"

playbooks/os-gnocchi-install.yml

@@ -46,6 +46,9 @@
     - role: "ceph_client"
       openstack_service_system_user: "{{ gnocchi_system_user_name }}"
       openstack_service_venv_bin: ""
+      when:
+        - inventory_hostname in groups['gnocchi_api']
+        - (gnocchi_storage_driver | default('none') | lower == 'ceph')
       tags:
         - ceph
     - role: "os_gnocchi"

playbooks/os-nova-install.yml

@@ -147,6 +147,10 @@
     - role: "ceph_client"
       openstack_service_system_user: "{{ nova_system_user_name }}"
       openstack_service_venv_bin: "{{ nova_bin }}"
+      when:
+        - inventory_hostname in groups['nova_compute']
+        - nova_libvirt_images_rbd_pool is defined or
+          cinder_backends_rbd_inuse | default(false) | bool
       tags:
         - ceph
     - role: "openstack_openrc"