preparing pg integration, mysql check and optional installation

defaults/main.yml

@@ -8,6 +8,10 @@ sympa_template_lists: []
 #  ssl: true
 #  queue_transport: sympa
 #  bouncequeue_transport: sympabounce
+
+## Database variables
+sympa_db_type: mysql             # mysql or pgsql
+sympa_install_db_package: false  # yes for this role to install mysql or postgres, no if installed elsewhere / TODO: not yet working for MySQL
 sympa_db_name: sympa
 sympa_db_host: localhost
 sympa_db_port: 3306
@@ -113,4 +117,5 @@ sympa_default_home: home
 sympa_edit_list: owner
 sympa_ldap_force_canonical_email: 1
 sympa_review_page_size: 25
+sympa_webserver_type: Other                        # 'Other' or 'Apache 2'
 sympa_web_page_title: Mailing lists service

tasks/main.yml

@@ -1,36 +1,24 @@
-- name: Set database to mysql
-  debconf:
-    name: sympa
-    question: sympa/database-type
-    value: mysql
-    vtype: select
+---
+## Sympa configuration main tasks file
 
-- name: Set webserver to other
-  debconf:
-    name: sympa
-    question: wwsympa/webserver_type
-    value: Other
-    vtype: select
+- name: MySQL/MariaDB configuration
+  include_tasks: mysql.yml
+  when: sympa_db_type == 'mysql'
+
+- name: PostgreSQL configuration
+  include_tasks: postgresql.yml
+  when: sympa_db_type == 'pgsql'
 
-- name: "Set dbconfig-install to no"
+- name: Set debconf options for sympa
   debconf:
-    name: sympa
-    question: sympa/dbconfig-install
-    value: no
-    vtype: boolean
-  changed_when: false
-
-- name: Create a new database with name '{{ sympa_db_name }}'
-  mysql_db:
-    name: "{{ sympa_db_name }}"
-    encoding: utf8
-
-- name: Create DB user '{{ sympa_db_user }}'
-  mysql_user:
-    name: "{{ sympa_db_user }}"
-    password: "{{ sympa_db_password | mandatory }}"
-    priv: '{{ sympa_db_name }}.*:ALL,GRANT'
-  no_log: True
+    name: "{{ item.name }}"
+    question: "{{ item.question }}"
+    value: "{{ item.value }}"
+    vtype: "{{ item.vtype }}"
+  loop:
+  - { name: 'sympa', question: 'sympa/database-type', value: '{{ sympa_db_type }}' , vtype: select }
+  - { name: 'sympa', question: 'sympa/dbconfig-install', value: 'true' , vtype: boolean }
+  - { name: 'sympa', question: 'wwsympa/webserver_type', value: '{{ sympa_webserver_type }}' , vtype: select }
 
 - name: Create sympa dir
   file:
@@ -173,3 +161,5 @@
     minute: "0"
     hour: "2"
     job: "/usr/lib/sympa/bin/sympa.pl --reload_list_config"
+
+...

tasks/mysql.yml

@@ -0,0 +1,53 @@
+---
+## MySQL configuration for sympa
+
+- name: check mysql installation
+  block: 
+  - name: Gather installed packages
+    package_facts:
+      manager: auto
+
+  - name: check if MySQL 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!"
+  when: not sympa_install_db_package
+
+## TODO: minimal installation of MySQL for sympa. This single task is not enough
+- name: Install MySQL packages 
+  apt: 
+    name: 
+    - default-mysql-server
+    - python-dev
+    - default-libmysqlclient-dev
+    state: present
+  when: sympa_install_db_package
+
+- name: Install pip, if not yet installed
+  apt: 
+    name: python-pip
+    state: present
+
+- name: install mysqlclient pip module, if not yet installed
+  pip: 
+    name: mysqlclient
+    state: present
+
+- name: Create a new database with name '{{ sympa_db_name }}'
+  mysql_db:
+    name: "{{ sympa_db_name }}"
+    encoding: utf8
+
+- name: Create DB user '{{ sympa_db_user }}'
+  mysql_user:
+    name: "{{ sympa_db_user }}"
+    password: "{{ sympa_db_password | mandatory }}"
+    priv: '{{ sympa_db_name }}.*:ALL,GRANT'
+  no_log: True
+
+...

tasks/postgresql.yml

@@ -0,0 +1,4 @@
+---
+## PostgreSQL configuration for sympa
+
+...