Add proxysql-config role and wrap it in loadbalancer-config role

This patch ads proxysql-config role
which is used for generating users and
rules configuration.

Change-Id: I1fcb0e8040ea55f8f6b8384a56479eabdaf61c33

ansible/roles/loadbalancer-config/tasks/main.yml

@@ -2,3 +2,7 @@
 - import_role:
     name: haproxy-config
   when: haproxy_config_install | bool
+
+- import_role:
+    name: proxysql-config
+  when: enable_proxysql | bool

ansible/roles/proxysql-config/defaults/main.yml

@@ -1,5 +1,5 @@
 ---
-proxysql_project_database_shard: "{{ lookup('vars', (kolla_role_name | default(project_name)) + '_database_shard') }}"
+proxysql_project_database_shard: "{{ lookup('vars', (kolla_role_name | default(project_name)) + '_database_shard', default=omit) }}"
 # NOTE(kevko): Kolla_role_name and replace is used only because of nova-cell
 proxysql_project: "{{ kolla_role_name | default(project_name) | replace('_','-') }}"
 proxysql_config_users: "{% if proxysql_project_database_shard is defined and proxysql_project_database_shard['users'] is defined %}True{% else %}False{% endif %}"

ansible/roles/proxysql-config/tasks/main.yml

@@ -1,24 +1,22 @@
 ---
-- name: "Copying over {{ proxysql_project }} users config"
+- name: "Copying over {{ proxysql_project }} ProxySQL users config"
   template:
     src: "users.yaml.j2"
     dest: "{{ node_config_directory }}/proxysql/users/{{ proxysql_project }}.yaml"
     mode: "0660"
   become: true
   when:
-    - enable_proxysql | bool
     - proxysql_config_users | bool
   notify:
     - Restart proxysql container
 
-- name: "Copying over {{ proxysql_project }} rules config"
+- name: "Copying over {{ proxysql_project }} ProxySQL rules config"
   template:
     src: "rules.yaml.j2"
     dest: "{{ node_config_directory }}/proxysql/rules/{{ proxysql_project }}.yaml"
     mode: "0660"
   become: true
   when:
-    - enable_proxysql | bool
     - proxysql_config_rules | bool
   notify:
     - Restart proxysql container