diff --git a/ansible/group_vars/all.yml b/ansible/group_vars/all.yml
new file mode 100644
index 0000000..caa297a
--- /dev/null
+++ b/ansible/group_vars/all.yml
@@ -0,0 +1,21 @@
+life_noc_fqdn: c7-life-noc-01
+life_noc_admin_user: icingadmin
+life_noc_admin_password: l1f3_N0C!_ADM
+
+life_noc_db_root_socket: /run/mysqld/mysqld.sock
+
+life_noc_db_icinga_name: icinga
+life_noc_db_icinga_user: icinga
+life_noc_db_icinga_password: l1f3_N0C!_DB
+
+life_noc_db_web_name: icingaweb2
+life_noc_db_web_user: icingaweb2
+life_noc_db_web_password: l1f3_N0C!_WEB_DB
+
+life_noc_icinga_repo_enabled: true
+life_noc_icinga_repo_distribution: icinga-bookworm
+life_noc_icinga_keyring_deb_url: https://packages.icinga.com/icinga-archive-keyring_latest+debian12.deb
+
+life_noc_businessprocess_enabled: true
+life_noc_businessprocess_version: v2.5.2
+life_noc_businessprocess_repo: https://github.com/Icinga/icingaweb2-module-businessprocess.git
diff --git a/ansible/inventory b/ansible/inventory
new file mode 100644
index 0000000..cd798c4
--- /dev/null
+++ b/ansible/inventory
@@ -0,0 +1,2 @@
+[icinga]
+c7-life-noc-01 ansible_host=192.168.12.40 ansible_user=ansible
diff --git a/ansible/roles/base/tasks/main.yml b/ansible/roles/base/tasks/main.yml
index 4bd05ac..adc44cf 100644
--- a/ansible/roles/base/tasks/main.yml
+++ b/ansible/roles/base/tasks/main.yml
@@ -9,6 +9,7 @@
       - python3
       - python3-yaml
       - unzip
+      - wget
     state: present
     update_cache: true
 
@@ -25,10 +26,42 @@
     state: present
   when: life_noc_icinga_repo_enabled | bool
 
+- name: verify icinga keyring exists
+  ansible.builtin.stat:
+    path: /usr/share/keyrings/icinga-archive-keyring.gpg
+  register: icinga_keyring_file
+
+- name: fail if icinga keyring is missing
+  ansible.builtin.fail:
+    msg: "La keyring Icinga /usr/share/keyrings/icinga-archive-keyring.gpg est absente après installation."
+  when: not icinga_keyring_file.stat.exists
+
 - name: configure official icinga apt repository
   ansible.builtin.apt_repository:
-    repo: "deb https://packages.icinga.com/debian {{ life_noc_icinga_repo_distribution }} main"
+    repo: "deb [signed-by=/usr/share/keyrings/icinga-archive-keyring.gpg] https://packages.icinga.com/debian {{ life_noc_icinga_repo_distribution }} main"
     filename: icinga
     state: present
-    update_cache: true
+    update_cache: false
   when: life_noc_icinga_repo_enabled | bool
+
+- name: configure official icinga apt source repository
+  ansible.builtin.apt_repository:
+    repo: "deb-src [signed-by=/usr/share/keyrings/icinga-archive-keyring.gpg] https://packages.icinga.com/debian {{ life_noc_icinga_repo_distribution }} main"
+    filename: icinga
+    state: present
+    update_cache: false
+  when: life_noc_icinga_repo_enabled | bool
+
+- name: verify icinga repository file exists
+  ansible.builtin.stat:
+    path: /etc/apt/sources.list.d/icinga.list
+  register: icinga_repo_file
+
+- name: fail if icinga repository file is missing
+  ansible.builtin.fail:
+    msg: "Le fichier /etc/apt/sources.list.d/icinga.list est absent."
+  when: not icinga_repo_file.stat.exists
+
+- name: update apt cache after icinga repository configuration
+  ansible.builtin.apt:
+    update_cache: true
diff --git a/ansible/roles/icingaweb2/tasks/main.yml b/ansible/roles/icingaweb2/tasks/main.yml
index dbe9f59..438f8bf 100644
--- a/ansible/roles/icingaweb2/tasks/main.yml
+++ b/ansible/roles/icingaweb2/tasks/main.yml
@@ -46,7 +46,9 @@
 
 - name: import icingaweb2 schema
   ansible.builtin.shell: |
-    mysql --socket={{ life_noc_db_root_socket }} {{ life_noc_db_web_name }} < /usr/share/icingaweb2/etc/schema/mysql.schema.sql
+    mysql --socket={{ life_noc_db_root_socket }} {{ life_noc_db_web_name }} < /usr/share/icingaweb2/schema/mysql.schema.sql
+  args:
+    executable: /bin/bash
   when: life_noc_web_schema_check.stdout | trim == '0'
 
 - name: generate icingaweb2 admin password hash
diff --git a/ansible/roles/life_noc/defaults/main.yml b/ansible/roles/life_noc/defaults/main.yml
index 74a3ee6..50d0941 100644
--- a/ansible/roles/life_noc/defaults/main.yml
+++ b/ansible/roles/life_noc/defaults/main.yml
@@ -3,7 +3,10 @@ life_noc_icinga_conf_root: /etc/icinga2/conf.d/life-noc
 life_noc_plugin_dir: /usr/lib/nagios/plugins
 life_noc_validate_icinga: true
 life_noc_reload_icinga: true
-life_noc_bpm_deploy_enabled: true
+life_noc_bpm_deploy_enabled: false
+life_noc_project_root: /opt/life-noc
+life_noc_bpm_deploy_enabled: false
+life_noc_bpm_destination_dir: /etc/icingaweb2/modules/businessprocess/processes
 life_noc_bpm_target_file: /etc/icingaweb2/modules/businessprocess/processes/life-noc.json
 life_noc_owner: root
 life_noc_group: root
diff --git a/ansible/roles/life_noc/tasks/main.yml b/ansible/roles/life_noc/tasks/main.yml
index b671ae0..08a3a71 100644
--- a/ansible/roles/life_noc/tasks/main.yml
+++ b/ansible/roles/life_noc/tasks/main.yml
@@ -1,124 +1,191 @@
+---
 - name: install minimal dependencies
-  ansible.builtin.package:
+  ansible.builtin.apt:
     name:
       - python3
       - python3-yaml
     state: present
+    update_cache: true
+
+- name: remove legacy life-noc subdirectory under icinga conf.d
+  ansible.builtin.file:
+    path: /etc/icinga2/conf.d/life-noc
+    state: absent
+  notify:
+    - validate icinga
+    - reload icinga
+
+- name: find previously deployed flattened life-noc config files
+  ansible.builtin.find:
+    paths: /etc/icinga2/conf.d
+    patterns: "life-noc-*"
+    file_type: file
+  register: life_noc_flattened_files
+
+- name: remove previously deployed flattened life-noc config files
+  ansible.builtin.file:
+    path: "{{ item.path }}"
+    state: absent
+  loop: "{{ life_noc_flattened_files.files }}"
+  notify:
+    - validate icinga
+    - reload icinga
 
 - name: create project root
   ansible.builtin.file:
     path: "{{ life_noc_project_root }}"
     state: directory
-    owner: "{{ life_noc_owner }}"
-    group: "{{ life_noc_group }}"
+    owner: root
+    group: root
     mode: "0755"
 
 - name: copy project files
   ansible.builtin.copy:
     src: "{{ playbook_dir }}/../"
     dest: "{{ life_noc_project_root }}/"
-    owner: "{{ life_noc_owner }}"
-    group: "{{ life_noc_group }}"
-
-- name: ensure icinga config tree exists
-  ansible.builtin.file:
-    path: "{{ item }}"
-    state: directory
     owner: root
     group: root
-    mode: "0755"
-  loop:
-    - "{{ life_noc_icinga_conf_root }}"
-    - "{{ life_noc_icinga_conf_root }}/commands"
-    - "{{ life_noc_icinga_conf_root }}/hosts"
-    - "{{ life_noc_icinga_conf_root }}/services"
-    - "{{ life_noc_icinga_conf_root }}/templates"
+    mode: preserve
 
 - name: generate icinga services from domains
-  ansible.builtin.command: python3 scripts/generate_services.py
-  args:
+  ansible.builtin.command:
+    cmd: python3 scripts/generate_services.py
     chdir: "{{ life_noc_project_root }}"
+  changed_when: true
 
 - name: generate bpm from domains
-  ansible.builtin.command: python3 scripts/generate_bpm.py
-  args:
+  ansible.builtin.command:
+    cmd: python3 scripts/generate_bpm.py
     chdir: "{{ life_noc_project_root }}"
+  changed_when: true
 
-- name: deploy icinga commands
+##################################
+
+- name: find life-noc command files on target
+  ansible.builtin.find:
+    paths: "{{ life_noc_project_root }}/icinga/commands"
+    patterns: "*.conf"
+    file_type: file
+  register: life_noc_command_files
+
+- name: deploy life-noc command files into icinga conf.d
   ansible.builtin.copy:
-    src: "{{ life_noc_project_root }}/icinga/commands/"
-    dest: "{{ life_noc_icinga_conf_root }}/commands/"
+    src: "{{ item.path }}"
+    dest: "/etc/icinga2/conf.d/life-noc-command-{{ item.path | basename }}"
     remote_src: true
     owner: root
     group: root
     mode: "0644"
-  notify: validate and reload icinga
+  loop: "{{ life_noc_command_files.files }}"
+  notify:
+    - validate icinga
+    - reload icinga
 
-- name: deploy icinga hosts
+- name: find life-noc template files on target
+  ansible.builtin.find:
+    paths: "{{ life_noc_project_root }}/icinga/templates"
+    patterns: "*.conf"
+    file_type: file
+  register: life_noc_template_files
+
+- name: deploy life-noc template files into icinga conf.d
   ansible.builtin.copy:
-    src: "{{ life_noc_project_root }}/icinga/hosts/"
-    dest: "{{ life_noc_icinga_conf_root }}/hosts/"
+    src: "{{ item.path }}"
+    dest: "/etc/icinga2/conf.d/life-noc-template-{{ item.path | basename }}"
     remote_src: true
     owner: root
     group: root
     mode: "0644"
-  notify: validate and reload icinga
+  loop: "{{ life_noc_template_files.files }}"
+  notify:
+    - validate icinga
+    - reload icinga
 
-- name: deploy icinga templates
+- name: find life-noc host files on target
+  ansible.builtin.find:
+    paths: "{{ life_noc_project_root }}/icinga/hosts"
+    patterns: "*.conf"
+    file_type: file
+  register: life_noc_host_files
+
+- name: deploy life-noc host files into icinga conf.d
   ansible.builtin.copy:
-    src: "{{ life_noc_project_root }}/icinga/templates/"
-    dest: "{{ life_noc_icinga_conf_root }}/templates/"
+    src: "{{ item.path }}"
+    dest: "/etc/icinga2/conf.d/life-noc-host-{{ item.path | basename }}"
     remote_src: true
     owner: root
     group: root
     mode: "0644"
-  notify: validate and reload icinga
+  loop: "{{ life_noc_host_files.files }}"
+  notify:
+    - validate icinga
+    - reload icinga
 
-- name: deploy icinga services
+- name: find life-noc service files on target
+  ansible.builtin.find:
+    paths: "{{ life_noc_project_root }}/icinga/services"
+    patterns: "*.conf"
+    file_type: file
+  register: life_noc_service_files
+
+- name: deploy life-noc service files into icinga conf.d
   ansible.builtin.copy:
-    src: "{{ life_noc_project_root }}/icinga/services/"
-    dest: "{{ life_noc_icinga_conf_root }}/services/"
+    src: "{{ item.path }}"
+    dest: "/etc/icinga2/conf.d/life-noc-service-{{ item.path | basename }}"
     remote_src: true
     owner: root
     group: root
     mode: "0644"
-  notify: validate and reload icinga
+  loop: "{{ life_noc_service_files.files }}"
+  notify:
+    - validate icinga
+    - reload icinga
+
+##################################
 
 - name: install mock plugin
   ansible.builtin.copy:
     src: "{{ life_noc_project_root }}/checks/check_life_noc_mock.sh"
-    dest: "{{ life_noc_plugin_dir }}/check_life_noc_mock.sh"
+    dest: /usr/lib/nagios/plugins/check_life_noc_mock.sh
     remote_src: true
     owner: root
     group: root
     mode: "0755"
-  notify: validate and reload icinga
+  notify:
+    - validate icinga
+    - reload icinga
 
 - name: install compatibility wrapper plugin
   ansible.builtin.copy:
     src: "{{ life_noc_project_root }}/checks/check_echeance_vie.sh"
-    dest: "{{ life_noc_plugin_dir }}/check_echeance_vie.sh"
+    dest: /usr/lib/nagios/plugins/check_echeance_vie.sh
     remote_src: true
     owner: root
     group: root
     mode: "0755"
-  notify: validate and reload icinga
+  notify:
+    - validate icinga
+    - reload icinga
 
 - name: ensure bpm destination directory exists
   ansible.builtin.file:
-    path: "{{ life_noc_bpm_target_file | dirname }}"
+    path: "{{ life_noc_bpm_destination_dir }}"
     state: directory
     owner: root
     group: root
     mode: "0755"
-  when: life_noc_bpm_deploy_enabled | bool
+  when:
+    - life_noc_bpm_deploy_enabled | bool
+    - life_noc_bpm_destination_dir is defined
 
 - name: deploy bpm json
   ansible.builtin.copy:
     src: "{{ life_noc_project_root }}/bpm/life-noc.json"
-    dest: "{{ life_noc_bpm_target_file }}"
+    dest: "{{ life_noc_bpm_destination_dir }}/life-noc.json"
     remote_src: true
     owner: root
     group: root
     mode: "0644"
-  when: life_noc_bpm_deploy_enabled | bool
+  when:
+    - life_noc_bpm_deploy_enabled | bool
+    - life_noc_bpm_destination_dir is defined