According to @Scriptkiddi code review, except sympa/dbconfig-install …

…debconf parameter

defaults/main.yml

@@ -11,7 +11,7 @@ sympa_template_lists: []
 
 ## Database variables
 sympa_db_type: mysql             # mysql or PostgreSQL
-sympa_install_db_package: false  # yes for this role to install mysql or postgres, no if installed elsewhere 
+sympa_install_db_package: False  # yes for this role to install mysql or postgres, no if installed elsewhere 
 sympa_db_name: sympa
 sympa_db_host: localhost
 sympa_db_port: 3306

tasks/main.yml

@@ -1,13 +1,20 @@
 ---
 ## Sympa configuration main tasks file
 
+- name: Check that "debconf" and "debconf-utils" are installed
+  apt:
+    name:
+    - debconf
+    - debconf-utils
+    state: latest
+
 - name: MySQL/MariaDB configuration
   include_tasks: mysql.yml
-  when: sympa_db_type == 'mysql'
+  when: sympa_db_type | lower == 'mysql'
 
 - name: PostgreSQL configuration
   include_tasks: postgresql.yml
-  when: sympa_db_type == 'PostgreSQL'
+  when: sympa_db_type | lower == 'postgresql'
 
 - name: Set debconf options for sympa
   debconf:

tasks/mysql.yml

@@ -1,21 +1,21 @@
 ---
 ## MySQL configuration for sympa
 
-- name: check MySQL installation
+- name: Check MySQL installation
   block: 
   - name: Gather installed packages
     package_facts:
       manager: auto
 
-  - name: check if MySQL is installed
+  - name: Check if mysql server package is installed
     assert:
       that: >
         ansible_facts.packages['default-mysql-server'] is defined or
         ansible_facts.packages['mysql-server'] is defined or
         ansible_facts.packages['mariadb-server-10.1'] is defined   
       ## The last condition could be replaced by a jinja2 json_query filter to match any version 
-      fail_msg: "No MySQL pachage found. We stop, because we can't install sympa without its database. Sorry."
-      success_msg: "MySQL package found. We can continue!"
+      fail_msg: "No mysql package found. We stop, because we can't install sympa without its database. Sorry."
+      success_msg: "mysql package found. We can continue!"
   when: not sympa_install_db_package
 
 - name: Install MySQL packages 

tasks/postgresql.yml

@@ -1,17 +1,17 @@
 ---
 ## PostgreSQL installation and configuration for sympa
 
-- name: check PostgreSQL installation
+- name: Check PostgreSQL installation
   block: 
   - name: Gather installed packages
     package_facts:
       manager: auto
 
-  - name: check if postgres is installed
+  - name: Check if postgresql server package is installed
     assert:
       that: ansible_facts.packages['postgresql'] is defined
-      fail_msg: "No PostgreSQL pachage found. We stop, because we can't install sympa without its database. Sorry."
-      success_msg: "PostgreSQL package found. We can continue!"
+      fail_msg: "No postgresql package found. We stop, because we can't install sympa without its database. Sorry."
+      success_msg: "postgresql package found. We can continue!"
   when: not sympa_install_db_package
 
 - name: Install PostgreSQL
@@ -53,13 +53,10 @@
 
 ## Debconf keys for sympa database
 
-- name: Definir opciones debconf de sympa, relativas a la base PostgreSQL
+- name: Define sympa postgresql database's password through debconf 
   debconf:
-    name: "{{ item.name }}"
-    question: "{{ item.question }}"
-    value: "{{ item.value }}"
-    vtype: "{{ item.vtype }}"
-  loop:
-      ## Set the sympa database password
-  - { name: 'sympa', question: 'sympa/pgsql/app-pass', value: '{{ sympa_db_password | mandatory }}' , vtype: password }
+    name: sympa
+    question: 'sympa/pgsql/app-pass'
+    value: '{{ sympa_db_password | mandatory }}'
+    vtype: password
 ...