Use global service variables

Instead of overriding each service separatelly it might make
sense for deployers to define some higher level variable that
will be used first or fallback to default variable.

Change-Id: Ic2fa270a3582db3da01b3c449fbdd8c2d5045062

defaults/main.yml

@@ -26,8 +26,7 @@ trove_venv_python_executable: "{{ openstack_venv_python_executable | default('py
 trove_service_setup_host: "{{ openstack_service_setup_host | default('localhost') }}"
 trove_service_setup_host_python_interpreter: "{{ openstack_service_setup_host_python_interpreter | default((trove_service_setup_host == 'localhost') | ternary(ansible_playbook_python, ansible_python['executable'])) }}"
 
-trove_package_state: "latest"
-trove_pip_package_state: "latest"
+trove_package_state: "{{ package_state | default('latest') }}"
 
 debug: false
 trove_system_group_name: trove
@@ -48,7 +47,7 @@ trove_service_description: "OpenStack DBaaS (Trove)"
 trove_service_project_name: "{{ trove_service_tenant_name }}"
 trove_service_admin_role_names:
   - admin
-trove_service_region: RegionOne
+trove_service_region: "{{ service_region | default('RegionOne') }}"
 trove_service_host: "{{ openstack_service_bind_address | default('0.0.0.0') }}"
 trove_service_port: 8779
 trove_service_proto: http
@@ -60,6 +59,8 @@ trove_service_internalurl: "{{ trove_service_internaluri_proto }}://{{ internal_
 trove_service_adminurl: "{{ trove_service_adminuri_proto }}://{{ internal_lb_vip_address }}:{{ trove_service_port }}/v1.0/%(tenant_id)s"
 trove_auth_url: "{{ keystone_service_internalurl }}"
 
+trove_service_in_ldap: "{{ service_ldap_backend_enabled | default(False) }}"
+
 trove_profiler_enabled: false
 
 ## Cap the maximum number of threads / workers when a user value is unspecified.
@@ -71,7 +72,7 @@ trove_conductor_workers_max: 16
 trove_conductor_workers: "{{ [[(ansible_processor_vcpus//ansible_processor_threads_per_core)|default(1), 1] | max * 2, trove_conductor_workers_max] | min }}"
 
 # Enable/Disable Ceilometer
-trove_ceilometer_enabled: False
+trove_ceilometer_enabled: "{{ (groups['ceilometer_all'] is defined) and (groups['ceilometer_all'] | length > 0) }}"
 
 trove_pip_install_args: "{{ pip_install_options | default('') }}"
 
@@ -95,7 +96,7 @@ trove_galera_user: trove
 trove_db_sync_options:
 trove_galera_use_ssl: "{{ galera_use_ssl | default(False) }}"
 trove_galera_ssl_ca_cert: "{{ galera_ssl_ca_cert | default('/etc/ssl/certs/galera-ca.pem') }}"
-trove_galera_port: 3306
+trove_galera_port: "{{ galera_port | default('3306') }}"
 trove_galera_connection_string: "mysql+pymysql://{{ trove_galera_user}}:{{ trove_galera_password }}@{{ trove_galera_address }}:{{ trove_galera_port }}/{{ trove_galera_database_name }}?charset=utf8{% if trove_galera_use_ssl | bool %}&ssl_ca={{ trove_galera_ssl_ca_cert }}{% endif %}"
 
 ## Oslo Messaging vars

tasks/main.yml

@@ -145,6 +145,7 @@
     _service_adminuri_insecure: "{{ keystone_service_adminuri_insecure }}"
     _service_setup_host: "{{ trove_service_setup_host }}"
     _service_setup_host_python_interpreter: "{{ trove_service_setup_host_python_interpreter }}"
+    _service_in_ldap: "{{ trove_service_in_ldap }}"
     _service_project_name: "{{ trove_service_project_name }}"
     _service_region: "{{ trove_service_region }}"
     _service_users: |-