Implemented vars, tasks and templates for central database setup until mastodon role

roles/docker-gitlab/tasks/main.yml

@@ -1,12 +1,15 @@
 ---
+- name: include docker vars
+  include_vars: vars/docker-database-service.yml.j2
+
+- name: create central database
+  include_role:
+    name: docker-{{database_type}}
+  when: enable_central_database | bool
+
 - name: "include tasks nginx-docker-proxy-domain.yml"
   include_tasks: nginx-docker-proxy-domain.yml
 
-- name: create database in central Postgres
-  include_role:
-    name: docker-postgres
-  when: enable_central_database | bool
-
 - name: "create {{docker_compose_instance_directory}}"
   file:
     path: "{{docker_compose_instance_directory}}"

roles/docker-gitlab/templates/docker-compose.yml.j2

@@ -41,15 +41,11 @@ services:
 
 {% include 'templates/docker-redis-service.yml.j2' %}
 
-{% if not enable_central_database %}
-{% include 'templates/docker-postgres-service.yml.j2' %}
-{% endif %}
+{% include 'templates/docker-{{ database_type }}-service.yml.j2' %}
 
 volumes:
   redis:
   config:
   logs:
   data:
-{% if not enable_central_database %}
-  database:
-{% endif %}
+{% include 'templates/docker-database-volume.yml.j2' %}

roles/docker-gitlab/vars/main.yml

@@ -1,7 +1,4 @@
 docker_compose_project_name:        "gitlab"
-docker_compose_instance_directory: "{{path_docker_compose_instances}}{{docker_compose_project_name}}/"
-database_host:                      "database"
-database_databasename:              "{{docker_compose_project_name}}"
-database_username:                  "{{docker_compose_project_name}}"
 database_password:                  "{{gitlab_database_password}}"
-database_version:                   "{{ gitlab_database_version | default(postgres_default_version) }}"
+database_version:                   "{{ gitlab_database_version | default(postgres_default_version) }}"
+database_type:                      "postgres"