Move database creation into role

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 implement a new variable called 'cloudkitty_db_setup_host'
which is used in the role to allow delegation of the database setup
task to any host, but defaults to the first member of the galera_all
host group. We also document the variable cloudkitty_galera_address which
has been used for a long time, but never documented.

Change-Id: I7bb3f38556558ef14723361d3672a1d06f839b52

defaults/main.yml

@@ -63,8 +63,12 @@ cloudkitty_output_backend: cloudkitty.backend.file.FileBackend
 cloudkitty_output_pipeline: osrf
 cloudkitty_output_basepath: /var/cloudkitty/reports
 
+cloudkitty_db_setup_host: "{{ ('galera_all' in groups) | ternary(groups['galera_all'][0], 'localhost') }}"
+cloudkitty_galera_address: "{{ galera_address | default('127.0.0.1') }}"
 cloudkitty_galera_database: cloudkitty
 cloudkitty_galera_user: cloudkitty
+cloudkitty_database_connection: >-
+  mysql+pymysql://{{ cloudkitty_galera_user }}:{{ cloudkitty_container_mysql_password }}@{{ cloudkitty_galera_address }}/{{ cloudkitty_galera_database }}?charset=utf8
 
 ## Service Type and Data
 cloudkitty_service_region: RegionOne
@@ -117,7 +121,3 @@ cloudkitty_requires_pip_packages:
 # pip packages required by this role. The value is picked up
 # by the py_pkgs lookup.
 cloudkitty_role_project_group: cloudkitty_all
-
-# The messaging driver to use, defaults to rabbit. Other drivers
-# include qpid and zmq. (string value)
-cloudkitty_database_connection: "mysql+pymysql://{{ cloudkitty_galera_user }}:{{ cloudkitty_container_mysql_password }}@{{ cloudkitty_galera_address }}/{{ cloudkitty_galera_database }}?charset=utf8"

extras/os-cloudkitty-install.yml

@@ -128,5 +128,9 @@
     cloudkitty_rabbitmq_servers: "{{ rabbitmq_servers }}"
     cloudkitty_rabbitmq_port: "{{ rabbitmq_port }}"
     cloudkitty_rabbitmq_use_ssl: "{{ rabbitmq_use_ssl }}"
+    galera_root_user: root
+  vars_prompt:
+    - name: "galera_root_password"
+      prompt: "What is galera_root_password?"
   vars_files:
     - defaults/repo_packages/openstack_services.yml

tasks/cloudkitty_db_setup.yml

@@ -22,7 +22,7 @@
     login_host: "{{ cloudkitty_galera_address }}"
     name: "{{ cloudkitty_galera_database }}"
     state: "present"
-  delegate_to: "{{ groups['galera_all'][0] }}"
+  delegate_to: "{{ cloudkitty_db_setup_host }}"
   no_log: true
   tags:
     - cloudkitty-db-setup
@@ -37,7 +37,7 @@
     host: "{{ item }}"
     state: "present"
     priv: "{{ cloudkitty_galera_database }}.*:ALL"
-  delegate_to: "{{ groups['galera_all'][0] }}"
+  delegate_to: "{{ cloudkitty_db_setup_host }}"
   no_log: true
   with_items:
     - "localhost"