solution

apache.yml

@@ -1,4 +1,4 @@
 ---
-- hosts: centos
+- hosts: cibles
   roles:
   - sib.apache

sib.apache/handlers/main.yml

@@ -2,5 +2,5 @@
 # handlers file for sib.apache
 - name: restart httpd
   service:
-    name: httpd
+    name: "{{ apache_service_name }}"
     state: restarted

sib.apache/tasks/main.yml

@@ -1,22 +1,36 @@
 ---
 # tasks file for sib.apache
-- name: install apache
-  yum:
-    name: httpd
+
+- name: read OS vars
+  tags: always
+  ansible.builtin.include_vars: "{{ ansible_os_family | lower }}.yml"
+
+
+- name: install apache on Centos
+  package:
+    name: "{{ apache_package_name }}"
     state: present
 
 - name: conf httpd
   template:
-    src: vhost.conf
-    dest: /etc/httpd/conf.d/vhost.conf
+    src: vhost.conf.jj
+    dest: "{{ apache_config_dir }}"
     mode: 0640
     owner: root
-    group: apache
+    group: "{{ apache_group_name }}"
   notify: restart httpd
 
+- name: delete default conf on debian
+  tags: debian
+  file:
+      path: "{{ apache_config_dir }}/000-default.conf"
+      state: absent
+  notify: restart httpd
+  when: ansible_os_family | lower == 'debian'
+
 - name: activate apache
   service:
-    name: httpd
+    name: "{{ apache_service_name }}"
     enabled: yes
     state: started
 
@@ -42,14 +56,17 @@
       immediate: yes
       state: enabled
   ignore_errors: true
+  when: ansible_os_family == 'RedHat'
 
 - name: create documentroot
   file:
-    name: /var/www/html/example.org/
+    name: '{{ item.documentroot }}'
     state: directory
+  loop: "{{ apache_vhosts }}"
 
 - name: copy index file
   template:
     src: index.txt
-    dest: /var/www/html/example.org/index.html
+    dest: "{{ item.documentroot }}"
     mode: 0644
+  loop: "{{ apache_vhosts }}"

sib.apache/vars/debian.yml

@@ -0,0 +1,4 @@
+apache_service_name: apache2
+apache_package_name: apache2
+apache_group_name: www-data
+apache_config_dir: /etc/apache2/sites-enabled/

sib.apache/vars/main.yml

@@ -1,2 +1,3 @@
 ---
 # vars file for sib.apache
+http_port: 80

sib.apache/vars/redhat.yml

@@ -0,0 +1,4 @@
+apache_service_name: httpd
+apache_package_name: httpd
+apache_group_name: apache
+apache_config_dir: /etc/httpd/conf.d/