Ajout du playbook de desinstall du monitoring Grafana

Ansible/playbooks/uninstall_monitoring.yml

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+# Désinstaller tous les agents (comportement par défaut)
+#ansible-playbook -i inventaire.yml playbooks/uninstall_monitoring.yml
+
+# Désinstaller uniquement promtail
+#ansible-playbook -i inventaire.yml playbooks/uninstall_monitoring.yml --tags promtail
+
+# Désinstaller uniquement node_exporter
+#ansible-playbook -i inventaire.yml playbooks/uninstall_monitoring.yml --tags node_exporter
+
+# Désinstaller promtail et prometheus (mais pas node_exporter)
+#ansible-playbook -i inventaire.yml playbooks/uninstall_monitoring.yml --tags "promtail,prometheus"
+
+# Dryrun, permet de voir les changements
+#ansible-playbook -i inventaire.yml playbook/uninstall_monitoring.yml --check
+
+---
+- name: Uninstall legacy monitoring agents (promtail, node_exporter, prometheus-agent)
+  hosts: all
+  become: yes
+  tasks:
+
+    # ====================
+    # 1. Stop services
+    # ====================
+    - name: Stop promtail service
+      systemd:
+        name: promtail
+        state: stopped
+      ignore_errors: yes
+      tags:
+        - promtail
+
+    - name: Stop node_exporter service
+      systemd:
+        name: node_exporter
+        state: stopped
+      ignore_errors: yes
+      tags:
+        - node_exporter
+
+    - name: Stop prometheus-agent service
+      systemd:
+        name: prometheus-agent
+        state: stopped
+      ignore_errors: yes
+      tags:
+        - prometheus
+
+    # ====================
+    # 2. Disable services
+    # ====================
+    - name: Disable promtail service
+      systemd:
+        name: promtail
+        enabled: no
+      ignore_errors: yes
+      tags:
+        - promtail
+
+    - name: Disable node_exporter service
+      systemd:
+        name: node_exporter
+        enabled: no
+      ignore_errors: yes
+      tags:
+        - node_exporter
+
+    - name: Disable prometheus-agent service
+      systemd:
+        name: prometheus-agent
+        enabled: no
+      ignore_errors: yes
+      tags:
+        - prometheus
+
+    # ====================
+    # 3. Remove systemd service files
+    # ====================
+    - name: Remove promtail systemd service file
+      file:
+        path: /etc/systemd/system/promtail.service
+        state: absent
+      tags:
+        - promtail
+
+    - name: Remove node_exporter systemd service file
+      file:
+        path: /etc/systemd/system/node_exporter.service
+        state: absent
+      tags:
+        - node_exporter
+
+    - name: Remove prometheus-agent systemd service file
+      file:
+        path: /etc/systemd/system/prometheus-agent.service
+        state: absent
+      tags:
+        - prometheus
+
+    # ====================
+    # 4. Reload systemd daemon
+    # ====================
+    - name: Reload systemd daemon
+      systemd:
+        daemon_reload: yes
+      tags:
+        - always
+
+    # ====================
+    # 5. Remove directories
+    # ====================
+    - name: Remove promtail directory
+      file:
+        path: /appli/cimut/promtail
+        state: absent
+      tags:
+        - promtail
+
+    - name: Remove node_exporter directory
+      file:
+        path: /appli/cimut/prometheus/node_exporter
+        state: absent
+      tags:
+        - node_exporter
+
+    - name: Remove prometheus directory
+      file:
+        path: /appli/cimut/prometheus
+        state: absent
+      tags:
+        - prometheus
+
+    # ====================
+    # 6. Remove system users
+    # ====================
+    - name: Remove promtail user
+      user:
+        name: promtail
+        state: absent
+        remove: yes
+      ignore_errors: yes
+      tags:
+        - promtail
+
+    - name: Remove node-exporter user
+      user:
+        name: node-exporter
+        state: absent
+        remove: yes
+      ignore_errors: yes
+      tags:
+        - node_exporter
+
+    - name: Remove prometheus-agent user
+      user:
+        name: prometheus-agent
+        state: absent
+        remove: yes
+      ignore_errors: yes
+      tags:
+        - prometheus
+
+    # ====================
+    # 7. Final verification
+    # ====================
+    - name: Display completion message
+      debug:
+        msg: "Legacy monitoring agents have been successfully uninstalled. Grafana Alloy is now the active monitoring solution."
+      tags:
+        - always