Refactor DB initialization handling: externalize database_init flag for svc-db-mariadb and svc-db-postgres, remove internal auto-detection, and pass explicit init signal from sys-stk-back-stateful. Improves clarity, avoids incorrect credential lookups, and stabilizes central DB setup.

Reference: ChatGPT conversation https://chatgpt.com/share/692def1c-a79c-800f-b7dd-35e1845424bf

roles/svc-db-mariadb/defaults/main.yml

@@ -1,3 +1,4 @@
 # Check out the README.md file for more information, why this encodings and collations are used
 database_encoding:  "utf8mb4"
-database_collation: "utf8mb4_unicode_ci"
+database_collation: "utf8mb4_unicode_ci"
+database_init:      false # When true a database is initialized

roles/svc-db-mariadb/tasks/01_core.yml

@@ -1,7 +1,7 @@
 
 - name: Create Docker network for MariaDB
   community.docker.docker_network:
-    name: "{{ mariadb_network_name }}"
+    name: "{{ mariadb_network }}"
     state: present
     ipam_config:
       - subnet: "{{ mariadb_subnet }}"
@@ -15,7 +15,7 @@
       MARIADB_ROOT_PASSWORD:  "{{ mariadb_root_pwd }}"
       MARIADB_AUTO_UPGRADE:   "1"
     networks:
-      - name: "{{ mariadb_network_name }}"
+      - name: "{{ mariadb_network }}"
     volumes:
       - "{{ mariadb_volume }}:/var/lib/mysql"
     published_ports:

roles/svc-db-mariadb/tasks/main.yml

@@ -3,4 +3,4 @@
 
 - name: "Initialize database for '{{ database_name }}'"
   include_tasks: 02_init.yml
-  when: "{{ mariadb_init }}"
+  when: database_init | bool

roles/svc-db-mariadb/vars/main.yml

@@ -1,10 +1,9 @@
-application_id:       svc-db-mariadb
-mariadb_root_pwd:     "{{ applications | get_app_conf(application_id,'credentials.root_password', True) }}"
-mariadb_init:         "{{ database_username is defined and database_password is defined and database_name is defined }}"
-mariadb_subnet:       "{{ networks.local['svc-db-mariadb'].subnet  }}"
-mariadb_network_name: "{{ applications | get_app_conf(application_id,'docker.network', True) }}"
-mariadb_volume:       "{{ applications | get_app_conf(application_id,'docker.volumes.data', True) }}"
-mariadb_image:        "{{ applications | get_app_conf(application_id,'docker.services.mariadb.image','mariadb', True) }}"
-mariadb_version:      "{{ applications | get_app_conf(application_id,'docker.services.mariadb.version', True) }}"
-mariadb_name:         "{{ applications | get_app_conf(application_id,'docker.services.mariadb.name', True) }}"
-mariadb_port:         "{{ database_port | default(ports.localhost.database[ application_id ]) }}"
+application_id:   svc-db-mariadb
+mariadb_root_pwd: "{{ applications | get_app_conf(application_id,'credentials.root_password') }}"
+mariadb_subnet:   "{{ networks.local['svc-db-mariadb'].subnet  }}"
+mariadb_network:  "{{ applications | get_app_conf(application_id,'docker.network') }}"
+mariadb_volume:   "{{ applications | get_app_conf(application_id,'docker.volumes.data') }}"
+mariadb_image:    "{{ applications | get_app_conf(application_id,'docker.services.mariadb.image','mariadb') }}"
+mariadb_version:  "{{ applications | get_app_conf(application_id,'docker.services.mariadb.version') }}"
+mariadb_name:     "{{ applications | get_app_conf(application_id,'docker.services.mariadb.name') }}"
+mariadb_port:     "{{ database_port | default(ports.localhost.database[ application_id ]) }}"

roles/svc-db-postgres/defaults/main.yml

@@ -1 +1,2 @@
-postgres_gis_enabled: false # Needed by mobilizon
+postgres_gis_enabled: false # Needed by mobilizon
+database_init:        false # When true a database is initialized

roles/svc-db-postgres/tasks/main.yml

@@ -11,4 +11,4 @@
 
 - name: "Initialize database for '{{ database_name }}'"
   include_tasks: 02_init.yml
-  when: POSTGRES_INIT | bool
+  when: database_init | bool

roles/svc-db-postgres/vars/main.yml

@@ -18,7 +18,6 @@ POSTGRES_NETWORK_NAME:                    "{{ applications | get_app_conf(applic
 POSTGRES_SUBNET:                          "{{ networks.local['svc-db-postgres'].subnet }}"
 POSTGRES_PASSWORD:                        "{{ applications | get_app_conf(application_id, 'credentials.POSTGRES_PASSWORD') }}"
 POSTGRES_PORT:                            "{{ database_port | default(ports.localhost.database[ application_id ]) }}"
-POSTGRES_INIT:                            "{{ database_username is defined and database_password is defined and database_name is defined }}"
 POSTGRES_EXPOSE_LOCAL:                    True # Exposes the db to localhost, almost everytime neccessary
 POSTGRES_CUSTOM_IMAGE_NAME:               "postgres_custom"
 POSTGRES_LOCAL_HOST:                      "127.0.0.1"

roles/sys-stk-back-stateful/tasks/main.yml

@@ -13,6 +13,8 @@
 - name: "For '{{ application_id }}': Load central RDBMS"
   include_role:
     name: sys-svc-rdbms
+  vars:
+    database_init: true # Initialize a custom database for the application
 
 - name: "For '{{ application_id }}': Load sys-stk-back-stateless"
   include_role: