Move database creation into role (sahara)

There is no record for why we implement the database creation outside
of the role in the playbook, when we could do it inside the role.

Implementing it inside the role allows us to reduce the quantity of
group_vars duplicated from the role, and allows us to better document
the required variables in the role. The delegation can still be done
as it is done in the playbook too.

In this patch we remove the group_vars which were duplicated from the
role, and remove the DB setup tasks as they are no longer required.

Change-Id: I2556013f462e5c4bff24beb1b11006e524bab5a2
Depends-On: https://review.openstack.org/571794

inventory/group_vars/sahara_all.yml

@@ -17,8 +17,6 @@ sahara_ceilometer_enabled: "{{ (groups['ceilometer_all'] is defined) and (groups
 sahara_service_region: "{{ service_region }}"
 sahara_service_in_ldap: "{{ service_ldap_backend_enabled }}"
 
-sahara_galera_address: "{{ galera_address }}"
-
 # venv fetch configuration
 sahara_venv_tag: "{{ venv_tag }}"
 sahara_venv_download_url: "{{ venv_base_download_url }}/sahara-{{ openstack_release }}-{{ ansible_architecture | lower }}.tgz"

playbooks/os-sahara-install.yml

@@ -15,6 +15,9 @@
   hosts: sahara_all
   gather_facts: "{{ osa_gather_facts | default(True) }}"
   user: root
+  environment: "{{ deployment_environment_variables | default({}) }}"
+  tags:
+    - sahara
   pre_tasks:
     - include: "common-tasks/os-{{ container_tech | default('lxc') }}-container-setup.yml"
 
@@ -46,14 +49,7 @@
         log_dirs:
           - src: "/openstack/log/{{ inventory_hostname }}-sahara"
             dest: "/var/log/sahara"
-    - include: common-tasks/mysql-db-user.yml
-      static: no
-      vars:
-        user_name: "{{ sahara_galera_user }}"
-        password: "{{ sahara_container_mysql_password }}"
-        login_host: "{{ sahara_galera_address }}"
-        db_name: "{{ sahara_galera_database }}"
-      when: inventory_hostname == groups['sahara_all'][0]
+
     - include: common-tasks/unbound-clients.yml
       static: no
       when:
@@ -67,7 +63,3 @@
         rsyslog_client_log_rotate_file: sahara_log_rotate
         rsyslog_client_log_dir: "/var/log/sahara"
         rsyslog_client_config_name: "99-sahara-rsyslog-client.conf"
-
-  environment: "{{ deployment_environment_variables | default({}) }}"
-  tags:
-    - sahara