Move database creation into role (gnocchi)

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: Ia183b0ec21863b6c8e3cce1aa7ce6d9fc55f1e04
Depends-On: https://review.openstack.org/571735

playbooks/os-gnocchi-install.yml

@@ -16,30 +16,28 @@
 - name: Install Gnocchi components
   hosts: gnocchi_all
   user: root
+  environment: "{{ deployment_environment_variables | default({}) }}"
+  tags:
+    - gnocchi
   pre_tasks:
     - include: "common-tasks/os-{{ container_tech | default('lxc') }}-container-setup.yml"
       static: no
       vars:
         list_of_bind_mounts: "{{ gnocchi_container_bind_mounts }}"
       when: (gnocchi_storage_driver == "file") or (gnocchi_storage_driver is not defined)
+
     - include: "common-tasks/os-{{ container_tech | default('lxc') }}-container-setup.yml"
       static: no
       when:
         - gnocchi_storage_driver is defined
         - gnocchi_storage_driver != "file"
+
     - include: common-tasks/os-log-dir-setup.yml
       vars:
         log_dirs:
           - src: "/openstack/log/{{ inventory_hostname }}-gnocchi"
             dest: "/var/log/gnocchi"
-    - include: common-tasks/mysql-db-user.yml
-      static: no
-      vars:
-        user_name: "{{ gnocchi_galera_user }}"
-        password: "{{ gnocchi_container_mysql_password }}"
-        login_host: "{{ gnocchi_galera_address }}"
-        db_name: "{{ gnocchi_galera_database }}"
-      when: inventory_hostname == groups['gnocchi_all'][0]
+
     - include: common-tasks/unbound-clients.yml
       static: no
       when:
@@ -53,6 +51,7 @@
         - (gnocchi_storage_driver | default('none') | lower == 'ceph')
       tags:
         - ceph
+
     - role: "os_gnocchi"
 
   post_tasks:
@@ -61,11 +60,3 @@
         rsyslog_client_log_rotate_file: gnocchi_log_rotate
         rsyslog_client_log_dir: "/var/log/gnocchi"
         rsyslog_client_config_name: "99-gnocchi-rsyslog-client.conf"
-
-  vars:
-    gnocchi_galera_user: gnocchi
-    gnocchi_galera_database: gnocchi
-    gnocchi_galera_address: "{{ galera_address }}"
-  environment: "{{ deployment_environment_variables | default({}) }}"
-  tags:
-    - gnocchi